/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <stefano@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.generation;
import java.beans.PropertyDescriptor;
import java.io.CharArrayReader;
import java.io.IOException;
import java.io.StringReader;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.components.flow.FlowHelper;
import org.apache.cocoon.components.flow.WebContinuation;
import org.apache.cocoon.components.flow.javascript.JavaScriptFlow;
import org.apache.cocoon.components.source.SourceUtil;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.Response;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.transformation.AbstractTransformer;
import org.apache.cocoon.xml.XMLConsumer;
import org.apache.cocoon.xml.dom.DOMBuilder;
import org.apache.cocoon.xml.dom.DOMStreamer;
import org.apache.commons.jexl.ExpressionFactory;
import org.apache.commons.jexl.JexlContext;
import org.apache.commons.jexl.util.introspection.Info;
import org.apache.commons.jexl.util.introspection.UberspectImpl;
import org.apache.commons.jexl.util.introspection.VelMethod;
import org.apache.commons.jexl.util.introspection.VelPropertyGet;
import org.apache.commons.jexl.util.introspection.VelPropertySet;
import org.apache.commons.jxpath.*;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceException;
import org.mozilla.javascript.*;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.AttributesImpl;
import org.xml.sax.helpers.LocatorImpl;
/**
* <p>(<em>JX</em> for <a href="http://jakarta.apache.org/commons/jxpath">Apache <em>JX</em>Path</a>
* and <a href="http://jakarta.apache.org/commons/jexl">Apache <em>J</em>e<em>x</em>l</a>).</p>
* <p>Uses the namespace <code>http://cocoon.apache.org/templates/jx/1.0</code></p>
* <p>Provides a generic page template with embedded JSTL and XPath
* expression substitution to access data sent by Cocoon Flowscripts.</p>
* The embedded expression language allows a page author to access an
* object using a simplified syntax such as
*
* <p><pre>
* <site signOn="${accountForm.signOn}">
* </pre></p>
*
* <p>Embedded JSTL expressions are contained in <code>${}</code>.</p>
* <p>Embedded XPath expressions are contained in <code>#{}</code>.</p>
* <p>Note that since this generator uses
* <a href="http://jakarta.apache.org/commons/jxpath">Apache JXPath</a>
* and <a href="http://jakarta.apache.org/commons/jexl">Apache Jexl</a>, the
* referenced objects may be Java Beans, DOM, JDOM, or JavaScript objects from
* a Flowscript. In addition the following implicit objects are available as
* both XPath and JSTL variables:</p>
* <p>
* <dl>
* <dt><code>request</code> (<code>org.apache.cocoon.environment.Request</code>)</dt>
* <dd>The Cocoon current request</dd>
*
* <dt><code>response</code> (<code>org.apache.cocoon.environment.Response</code>)</dt>
* <dd>The Cocoon response associated with the current request</dd>
*
* <dt><code>session</code> (<code>org.apache.cocoon.environment.Session</code>)</dt>
* <dd>The Cocoon session associated with the current request</dd>
*
* <dt><code>context</code> (<code>org.apache.cocoon.environment.Context</code>)</dt>
* <dd>The Cocoon context associated with the current request</dd>
*
* <dt><code>parameters</code> (<code>org.apache.avalon.framework.parameters.Parameters</code>)</dt>
* <dd>Any parameters passed to the generator in the pipeline</dd>
* </dl>
* </p>
*
* The current Web Continuation from the Flowscript
* is also available as a variable named <code>continuation</code>. You would
* typically access its <code>id</code>:
*
* <p><pre>
* <form action="${continuation.id}">
* </pre></p>
*
* <p>You can also reach previous continuations by using the
* <code>getContinuation()</code> function:</p>
*
* <p><pre>
* <form action="${continuation.getContinuation(1).id}" >
* </pre></p>
*
* <p>
* <p>The <code>template</code> tag defines a new template:</p><pre>
* <template>
* body
* </template>
* </pre></p>
*
* <p>The <code>import</code> tag allows you to include another template
* within the current template. The content of the imported template is
* compiled and will be executed in place of the <code>import</code> tag:</p><pre>
* <import uri="URI" [context="Expression"]/>
* </pre></p><p>The Cocoon source resolver is used to resolve <code>uri</code>.
* If <code>context</code> is present, then its value is used as the context
* for evaluating the imported template, otherwise the current context is
* used.</p>
* <p>The <code>set</code> tag creates a local alias of an object. The
* <code>var</code> attribute specifies the name of a variable to assign the
* object to. The <code>value</code> attribute specifies the object (defaults
* to <code>body</code> if not present):</p>
*
* <pre>
* <set var="Name" [value="Value"]>
* [body]
* </set>
* </pre></p>
*
* <p>If used within a <code>macro</code> definition (see below)
* variables created by <code>set</code> are only visible within the body of
* the <code>macro</code>.</p>
* <p>The <code>if</code> tag allows the conditional execution of its body
* according to value of a <code>test</code> attribute:</p>
*
* <p><pre>
* <if test="Expression">
* body
* </if>
* </pre></p>
*
* <p>The <code>choose</code> tag performs conditional block execution by the
* embedded <code>when</code> sub tags. It renders the body of the first
* <code>when</code> tag whose <code>test</code> condition evaluates to true.
* If none of the <code>test</code> conditions of nested <code>when</code> tags
* evaluate to <code>true</code>, then the body of an <code>otherwise</code>
* tag is evaluated, if present:</p>
*
* <p><pre>
* <choose>
* <when test="Expression">
* body
* </when>
* <otherwise>
* body
* </otherwise>
* </choose>
* </pre></p>
*
* <p>The <code>out</code> tag evaluates an expression and outputs
* the result of the evaluation:</p>
*
* <p><pre>
* <out value="Expression"/>
* </pre></p>
*
* <p>The <code>forEach</code> tag allows you to iterate over a collection
* of objects:<p>
*
* <p><pre>
* <forEach [var="Name"] [items="Expression"]
[begin="Number"] [end="Number"] [step="Number"]>
* body
* </forEach>
* </pre></p>
*
* <p>The <code>items</code> attribute specifies the list of items to iterate
* over. The <code>var</code> attribute specifies the name of a variable to
* hold the current item. The <code>begin</code> attribute specifies the
* element to start with (<code>0</code> = first item,
* <code>1</code> = second item, ...).
* If unspecified it defaults to <code>0</code>. The <code>end</code>
* attribute specifies the item to end with (<code>0</code> = first item,
* <code>1</code> = second item, ...). If unspecified it defaults to the last
* item in the list. Every <code>step</code> items are
* processed (defaults to <code>1</code> if <code>step</code> is absent).
* Either <code>items</code> or both <code>begin</code> and <code>end</code>
* must be present.<p>
*
* <p>The <code>macro</code> tag allows you define a new custom tag.</p>
*
* <p><pre>
* <macro name="Name" [targetNamespace="Namespace"]>
* <parameter name="Name" [optional="Boolean"] [default="Value"]/>*
* body
* </macro>
* </pre></p>
*
*<p> For example:</p>
*
*<p><pre>
* <c:macro name="d">
* <tr><td></td></tr>
* </c:macro>
* </pre></p>
*
* <p>The tag being defined in this example is <code><d></code> and it
* can be used like any other tag:</p>
*
* <p><pre>
* <d/>
* </pre></p>
*
* <p>However, when this tag is used it will be replaced with a row containing
* a single empty data cell.</p>
* <p> When such a tag is used, the attributes and content of the tag become
* available as variables in the body of the <code>macro</code>'s definition,
* for example:</p>
*
* <p><pre>
* <c:macro name="tablerows">
* <c:parameter name="list"/>
* <c:parameter name="color"/>
* <c:forEach var="item" items="${list}">
* <tr><td bgcolor="${color}">${item}</td></tr>
* </c:forEach>
* </c:macro>
* </pre></p>
*
* <p>The <code>parameter</code> tags in the macro definition define formal
* parameters, which are replaced with the actual attribute values of the
* tag when it is used. The content of the tag is also available as a special
* variable <code>${content}</code>.</p><p>Assuming you had this code in your
* flowscript:</p>
* <code>var greatlakes = ["Superior", "Michigan", "Huron", "Erie", "Ontario"];</code>
* </p><p><code> sendPage(uri, {greatlakes: greatlakes});</code>
* </p><p>and a template like this:</p>
*
* <p><pre>
* <table>
* <tablerows list="${greatlakes}" color="blue"/>
* </table>
* </pre></p>
*
* <p>When the <code>tablerows</code> tag is used in this situation the
* following output would be generated:
* </p>
*<p><pre>
* <table>
* <tr><td bgcolor="blue">Superior</td></tr>
* <tr><td bgcolor="blue">Michigan</td></tr>
* <tr><td bgcolor="blue">Huron</td></tr>
* <tr><td bgcolor="blue">Erie</td></tr>
* <tr><td bgcolor="blue">Ontario</td></tr>
* </table>
* </pre></p>
*/
public class JXTemplateGenerator extends ComposerGenerator {
private static final JXPathContextFactory
jxpathContextFactory = JXPathContextFactory.newInstance();
private static final char[] EMPTY_CHARS = "".toCharArray();
private static final Attributes EMPTY_ATTRS = new AttributesImpl();
private static final Iterator EMPTY_ITER = new Iterator() {
public boolean hasNext() {
return false;
}
public Object next() {
return null;
}
public void remove() {
}
};
private static final Iterator NULL_ITER = new Iterator() {
public boolean hasNext() {
return true;
}
public Object next() {
return null;
}
public void remove() {
}
};
private static final Locator NULL_LOCATOR = new LocatorImpl();
/**
* Jexl Introspector that supports Rhino JavaScript objects
* as well as Java Objects
*/
static class JSIntrospector extends UberspectImpl {
static class JSMethod implements VelMethod {
Scriptable scope;
String name;
public JSMethod(Scriptable scope, String name) {
this.scope = scope;
this.name = name;
}
public Object invoke(Object thisArg, Object[] args)
throws Exception {
Context cx = Context.enter();
try {
Object result;
Scriptable thisObj;
if (!(thisArg instanceof Scriptable)) {
thisObj = Context.toObject(thisArg, scope);
} else {
thisObj = (Scriptable)thisArg;
}
result = ScriptableObject.getProperty(thisObj, name);
Object[] newArgs = null;
if (args != null) {
newArgs = new Object[args.length];
for (int i = 0; i < args.length; i++) {
newArgs[i] = args[i];
if (args[i] != null &&
!(args[i] instanceof Number) &&
!(args[i] instanceof Boolean) &&
!(args[i] instanceof String) &&
!(args[i] instanceof Scriptable)) {
newArgs[i] = Context.toObject(args[i], scope);
}
}
}
result = ScriptRuntime.call(cx, result, thisObj,
newArgs, scope);
if (result == Undefined.instance ||
result == ScriptableObject.NOT_FOUND) {
result = null;
} else while (result instanceof Wrapper) {
result = ((Wrapper)result).unwrap();
}
return result;
} catch (JavaScriptException e) {
throw new java.lang.reflect.InvocationTargetException(e);
} finally {
Context.exit();
}
}
public boolean isCacheable() {
return false;
}
public String getMethodName() {
return name;
}
public Class getReturnType() {
return Object.class;
}
}
static class JSPropertyGet implements VelPropertyGet {
Scriptable scope;
String name;
public JSPropertyGet(Scriptable scope, String name) {
this.scope = scope;
this.name = name;
}
public Object invoke(Object thisArg) throws Exception {
Context.enter();
try {
Scriptable thisObj;
if (!(thisArg instanceof Scriptable)) {
thisObj = Context.toObject(thisArg, scope);
} else {
thisObj = (Scriptable)thisArg;
}
Object result = ScriptableObject.getProperty(thisObj, name);
if (result == Undefined.instance ||
result == ScriptableObject.NOT_FOUND) {
result = null;
} else while (result instanceof Wrapper) {
result = ((Wrapper)result).unwrap();
}
return result;
} finally {
Context.exit();
}
}
public boolean isCacheable() {
return false;
}
public String getMethodName() {
return name;
}
}
static class JSPropertySet implements VelPropertySet {
Scriptable scope;
String name;
public JSPropertySet(Scriptable scope, String name) {
this.scope = scope;
this.name = name;
}
public Object invoke(Object thisArg, Object rhs) throws Exception {
Context.enter();
try {
Scriptable thisObj;
Object arg = rhs;
if (!(thisArg instanceof Scriptable)) {
thisObj = Context.toObject(thisArg, scope);
} else {
thisObj = (Scriptable)thisArg;
}
if (arg != null &&
!(arg instanceof Number) &&
!(arg instanceof Boolean) &&
!(arg instanceof String) &&
!(arg instanceof Scriptable)) {
arg = Context.toObject(arg, scope);
}
ScriptableObject.putProperty(thisObj, name, arg);
return rhs;
} finally {
Context.exit();
}
}
public boolean isCacheable() {
return false;
}
public String getMethodName() {
return name;
}
}
static class NativeArrayIterator implements Iterator {
NativeArray arr;
int index;
public NativeArrayIterator(NativeArray arr) {
this.arr = arr;
this.index = 0;
}
public boolean hasNext() {
return index < (int)arr.jsGet_length();
}
public Object next() {
Context.enter();
try {
Object result = arr.get(index++, arr);
if (result == Undefined.instance ||
result == ScriptableObject.NOT_FOUND) {
result = null;
} else while (result instanceof Wrapper) {
result = ((Wrapper)result).unwrap();
}
return result;
} finally {
Context.exit();
}
}
public void remove() {
arr.delete(index);
}
}
static class ScriptableIterator implements Iterator {
Scriptable scope;
Object[] ids;
int index;
public ScriptableIterator(Scriptable scope) {
this.scope = scope;
this.ids = scope.getIds();
this.index = 0;
}
public boolean hasNext() {
return index < ids.length;
}
public Object next() {
Context.enter();
try {
Object result =
ScriptableObject.getProperty(scope,
ids[index++].toString());
if (result == Undefined.instance ||
result == ScriptableObject.NOT_FOUND) {
result = null;
} else while (result instanceof Wrapper) {
result = ((Wrapper)result).unwrap();
}
return result;
} finally {
Context.exit();
}
}
public void remove() {
Context.enter();
try {
scope.delete(ids[index].toString());
} finally {
Context.exit();
}
}
}
public Iterator getIterator(Object obj, Info i)
throws Exception {
if (!(obj instanceof Scriptable)) {
return super.getIterator(obj, i);
}
if (obj instanceof NativeArray) {
return new NativeArrayIterator((NativeArray)obj);
}
return new ScriptableIterator((Scriptable)obj);
}
public VelMethod getMethod(Object obj, String methodName,
Object[] args, Info i)
throws Exception {
if (!(obj instanceof Scriptable)) {
return super.getMethod(obj, methodName, args, i);
}
return new JSMethod((Scriptable)obj, methodName);
}
public VelPropertyGet getPropertyGet(Object obj, String identifier,
Info i)
throws Exception {
if (!(obj instanceof Scriptable)) {
return super.getPropertyGet(obj, identifier, i);
}
return new JSPropertyGet((Scriptable)obj, identifier);
}
public VelPropertySet getPropertySet(Object obj, String identifier,
Object arg, Info i)
throws Exception {
if (!(obj instanceof Scriptable)) {
return super.getPropertySet(obj, identifier, arg, i);
}
return new JSPropertySet((Scriptable)obj, identifier);
}
}
static class MyJexlContext
extends HashMap implements JexlContext {
public Map getVars() {
return this;
}
public void setVars(Map map) {
putAll(map);
}
public Object get(Object key) {
Object result = super.get(key);
if (result != null) {
return result;
}
MyJexlContext c = closure;
for (; c != null; c = c.closure) {
result = c.get(key);
if (result != null) {
return result;
}
}
return result;
}
MyJexlContext closure;
MyJexlContext() {
}
MyJexlContext(MyJexlContext closure) {
this.closure = closure;
}
}
static class MyVariables implements Variables {
Map localVariables = new HashMap();
static final String[] VARIABLES = new String[] {
"continuation",
"flowContext",
"request",
"response",
"context",
"session",
"parameters"
};
Object bean, kont, request, response,
session, context, parameters;
MyVariables(Object bean, WebContinuation kont,
Request request, Response response,
org.apache.cocoon.environment.Context context,
Parameters parameters) {
this.bean = bean;
this.kont = kont;
this.request = request;
this.session = request.getSession(false);
this.response = response;
this.context = context;
this.parameters = parameters;
}
public boolean isDeclaredVariable(String varName) {
for (int i = 0; i < VARIABLES.length; i++) {
if (varName.equals(VARIABLES[i])) {
return true;
}
}
return localVariables.containsKey(varName);
}
public Object getVariable(String varName) {
if (varName.equals("continuation")) {
return kont;
} else if (varName.equals("flowContext")) {
return bean;
} else if (varName.equals("request")) {
return request;
} else if (varName.equals("response")) {
return response;
} else if (varName.equals("session")) {
return session;
} else if (varName.equals("context")) {
return context;
} else if (varName.equals("parameters")) {
return parameters;
}
return localVariables.get(varName);
}
public void declareVariable(String varName, Object value) {
localVariables.put(varName, value);
}
public void undeclareVariable(String varName) {
localVariables.remove(varName);
}
}
static {
// Hack: there's no _nice_ way to add my introspector to Jexl right now
try {
Field field =
org.apache.commons.jexl.util.Introspector.class.getDeclaredField("uberSpect");
field.setAccessible(true);
field.set(null, new JSIntrospector());
} catch (Exception e) {
e.printStackTrace();
}
}
final static String NS =
"http://apache.org/cocoon/templates/jx/1.0";
final static String TEMPLATE = "template";
final static String FOR_EACH = "forEach";
final static String IF = "if";
final static String CHOOSE = "choose";
final static String WHEN = "when";
final static String OTHERWISE = "otherwise";
final static String OUT = "out";
final static String IMPORT = "import";
final static String SET = "set";
final static String MACRO = "macro";
final static String PARAMETER = "parameter";
/**
* Compile a single Jexl expr (contained in ${}) or XPath expression
* (contained in #{})
*/
private static Expression compileExpr(String expr, String errorPrefix,
Locator location)
throws SAXParseException {
try {
return compileExpr(expr);
} catch (Exception exc) {
throw new SAXParseException(errorPrefix + exc.getMessage(),
location, exc);
} catch (Error err) {
throw new SAXParseException(errorPrefix + err.getMessage(),
location, null);
}
}
private static Expression compileExpr(String inStr) throws Exception {
try {
if (inStr == null) return null;
StringReader in = new StringReader(inStr.trim());
int ch;
StringBuffer expr = new StringBuffer();
boolean xpath = false;
boolean inExpr = false;
while ((ch = in.read()) != -1) {
char c = (char)ch;
if (inExpr) {
if (c == '\\') {
ch = in.read();
if (ch == -1) {
expr.append('\\');
} else {
expr.append((char)ch);
}
} else if (c == '}') {
String str = expr.toString();
return compile(str, xpath);
} else {
expr.append(c);
}
} else {
if (c == '$' || c == '#') {
ch = in.read();
if (ch == '{') {
inExpr = true;
xpath = c == '#';
continue;
}
}
// hack: invalid expression?
// just return the original and swallow exception
return new Expression(inStr, null);
}
}
} catch (IOException ignored) {
ignored.printStackTrace();
}
return new Expression(inStr, null);
}
// Compile an integer expression (returns either a Compiled Expression
// or an Integer literal)
private static Expression compileInt(String val, String msg, Locator location)
throws SAXException {
Expression res = compileExpr(val, msg, location);
if (res == null) return null;
if (res.compiledExpression != null) {
res.compiledExpression = Integer.valueOf(res.raw);
}
return res;
}
private static Expression compile(final String variable, boolean xpath)
throws Exception {
Object compiled;
if (xpath) {
compiled = JXPathContext.compile(variable);
} else {
compiled = ExpressionFactory.createExpression(variable);
}
return new Expression(variable, compiled);
}
private Object getValue(Expression expr, JexlContext jexlContext,
JXPathContext jxpathContext)
throws Exception {
Object compiled = expr.compiledExpression;
try {
if (compiled instanceof CompiledExpression) {
CompiledExpression e = (CompiledExpression)compiled;
return e.getValue(jxpathContext);
} else if (compiled instanceof org.apache.commons.jexl.Expression) {
org.apache.commons.jexl.Expression e =
(org.apache.commons.jexl.Expression)compiled;
return e.evaluate(jexlContext);
}
return compiled;
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t instanceof Exception) {
throw (Exception)t;
}
throw (Error)t;
}
}
private int getIntValue(Expression expr, JexlContext jexlContext,
JXPathContext jxpathContext)
throws Exception {
Object res = getValue(expr, jexlContext, jxpathContext);
if (res instanceof Number) {
return ((Number)res).intValue();
}
return 0;
}
// Hack: try to prevent JXPath from converting result to a String
private Object getNode(Expression expr, JexlContext jexlContext,
JXPathContext jxpathContext)
throws Exception {
try {
Object compiled = expr.compiledExpression;
if (compiled instanceof CompiledExpression) {
CompiledExpression e = (CompiledExpression)compiled;
return e.getPointer(jxpathContext, expr.raw).getNode();
} else if (compiled instanceof org.apache.commons.jexl.Expression) {
org.apache.commons.jexl.Expression e =
(org.apache.commons.jexl.Expression)compiled;
return e.evaluate(jexlContext);
}
return compiled;
} catch (InvocationTargetException e) {
Throwable t = e.getTargetException();
if (t instanceof Exception) {
throw (Exception)t;
}
throw (Error)t;
}
}
static class Event {
final Locator location;
Event next; // in document order
Event(Locator locator) {
this.location =
locator == null ? NULL_LOCATOR : new LocatorImpl(locator);
}
public String locationString() {
String result = "";
String systemId = location.getSystemId();
if (systemId != null) {
result += systemId + ", ";
}
result += "Line " + location.getLineNumber();
int col = location.getColumnNumber();
if (col > 0) {
result += "." + col;
}
return result;
}
}
static class TextEvent extends Event {
TextEvent(Locator location,
char[] chars, int start, int length)
throws SAXException {
super(location);
StringBuffer buf = new StringBuffer();
this.raw = new char[length];
System.arraycopy(chars, start, this.raw, 0, length);
CharArrayReader in = new CharArrayReader(chars, start, length);
int ch;
boolean inExpr = false;
boolean xpath = false;
try {
top: while ((ch = in.read()) != -1) {
char c = (char)ch;
processChar: while (true) {
if (inExpr) {
if (c == '\\') {
ch = in.read();
if (ch == -1) {
buf.append('\\');
} else {
buf.append((char)ch);
}
} else if (c == '}') {
String str = buf.toString();
Object compiledExpression;
try {
if (xpath) {
compiledExpression =
JXPathContext.compile(str);
} else {
compiledExpression =
ExpressionFactory.createExpression(str);
}
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
location,
exc);
}
substitutions.add(new Expression(str,
compiledExpression));
buf.setLength(0);
inExpr = false;
} else {
buf.append(c);
}
} else {
if (c == '\\') {
ch = in.read();
if (ch == -1) {
buf.append('\\');
} else {
buf.append((char)ch);
}
} else if (c == '$' || c == '#') {
ch = in.read();
if (ch == '{') {
xpath = c == '#';
inExpr = true;
if (buf.length() > 0) {
char[] charArray =
new char[buf.length()];
buf.getChars(0, buf.length(),
charArray, 0);
substitutions.add(charArray);
buf.setLength(0);
}
continue top;
} else {
buf.append(c);
if (ch != -1) {
c = (char)ch;
continue processChar;
}
}
} else {
buf.append(c);
}
}
break;
}
}
} catch (IOException ignored) {
// won't happen
ignored.printStackTrace();
}
if (buf.length() > 0) {
char[] charArray =
new char[buf.length()];
buf.getChars(0, buf.length(), charArray, 0);
substitutions.add(charArray);
} else if (substitutions.size() == 0) {
substitutions.add(EMPTY_CHARS);
}
}
final List substitutions = new LinkedList();
final char[] raw;
}
static class Characters extends TextEvent {
Characters(Locator location,
char[] chars, int start, int length)
throws SAXException {
super(location, chars, start, length);
}
}
static class StartDocument extends Event {
StartDocument(Locator location) {
super(location);
}
long compileTime;
EndDocument endDocument; // null if document fragment
}
static class EndDocument extends Event {
EndDocument(Locator location) {
super(location);
}
}
static class EndElement extends Event {
EndElement(Locator location,
StartElement startElement) {
super(location);
this.startElement = startElement;
}
final StartElement startElement;
}
static class EndPrefixMapping extends Event {
EndPrefixMapping(Locator location, String prefix) {
super(location);
this.prefix = prefix;
}
final String prefix;
}
static class IgnorableWhitespace extends TextEvent {
IgnorableWhitespace(Locator location,
char[] chars, int start, int length)
throws SAXException {
super(location, chars, start, length);
}
}
static class ProcessingInstruction extends Event {
ProcessingInstruction(Locator location,
String target, String data) {
super(location);
this.target = target;
this.data = data;
}
final String target;
final String data;
}
static class SkippedEntity extends Event {
SkippedEntity(Locator location, String name) {
super(location);
this.name = name;
}
final String name;
}
abstract static class AttributeEvent {
AttributeEvent(String namespaceURI, String localName, String raw,
String type) {
this.namespaceURI = namespaceURI;
this.localName = localName;
this.raw = raw;
this.type = type;
}
final String namespaceURI;
final String localName;
final String raw;
final String type;
}
static class CopyAttribute extends AttributeEvent {
CopyAttribute(String namespaceURI,
String localName,
String raw,
String type, String value) {
super(namespaceURI, localName, raw, type);
this.value = value;
}
final String value;
}
static class Subst {
}
static class Literal extends Subst {
Literal(String val) {
this.value = val;
}
final String value;
}
static class Expression extends Subst {
Expression(String raw, Object expr) {
this.raw = raw;
this.compiledExpression = expr;
}
String raw;
Object compiledExpression;
}
static class SubstituteAttribute extends AttributeEvent {
SubstituteAttribute(String namespaceURI,
String localName,
String raw,
String type, List substs) {
super(namespaceURI, localName, raw, type);
this.substitutions = substs;
}
final List substitutions;
}
static class StartElement extends Event {
StartElement(Locator location, String namespaceURI,
String localName, String raw,
Attributes attrs)
throws SAXException {
super(location);
this.namespaceURI = namespaceURI;
this.localName = localName;
this.raw = raw;
this.qname = "{"+namespaceURI+"}"+localName;
StringBuffer buf = new StringBuffer();
for (int i = 0, len = attrs.getLength(); i < len; i++) {
String uri = attrs.getURI(i);
String local = attrs.getLocalName(i);
String qname = attrs.getQName(i);
String type = attrs.getType(i);
String value = attrs.getValue(i);
StringReader in = new StringReader(value);
int ch;
buf.setLength(0);
boolean inExpr = false;
List substEvents = new LinkedList();
boolean xpath = false;
try {
top: while ((ch = in.read()) != -1) {
char c = (char)ch;
processChar: while (true) {
if (inExpr) {
if (c == '\\') {
ch = in.read();
if (ch == -1) {
buf.append('\\');
} else {
buf.append((char)ch);
}
} else if (c == '}') {
String str = buf.toString();
Expression compiledExpression;
try {
compiledExpression =
compile(str, xpath);
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
location,
exc);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
location,
null);
}
substEvents.add(compiledExpression);
buf.setLength(0);
inExpr = false;
} else {
buf.append(c);
}
} else {
if (c == '\\') {
ch = in.read();
if (ch == -1) {
buf.append('\\');
} else {
buf.append((char)ch);
}
} if (c == '$' || c == '#') {
ch = in.read();
if (ch == '{') {
if (buf.length() > 0) {
substEvents.add(new Literal(buf.toString()));
buf.setLength(0);
}
inExpr = true;
xpath = c == '#';
continue top;
} else {
buf.append(c);
if (ch != -1) {
c = (char)ch;
continue processChar;
}
}
} else {
buf.append(c);
}
}
break;
}
}
} catch (IOException ignored) {
ignored.printStackTrace();
}
if (buf.length() > 0) {
if (substEvents.size() == 0) {
attributeEvents.add(new CopyAttribute(uri,
local,
qname,
type,
value));
} else {
substEvents.add(new Literal(buf.toString()));
attributeEvents.add(new SubstituteAttribute(uri,
local,
qname,
type,
substEvents));
}
} else {
if (substEvents.size() > 0) {
attributeEvents.add(new SubstituteAttribute(uri,
local,
qname,
type,
substEvents));
} else {
attributeEvents.add(new CopyAttribute(uri, local,
qname, type,
""));
}
}
}
this.attributes = new AttributesImpl(attrs);
}
final String namespaceURI;
final String localName;
final String raw;
final String qname;
final List attributeEvents = new LinkedList();
final Attributes attributes;
EndElement endElement;
}
static class StartPrefixMapping extends Event {
StartPrefixMapping(Locator location, String prefix,
String uri) {
super(location);
this.prefix = prefix;
this.uri = uri;
}
final String prefix;
final String uri;
}
static class Comment extends TextEvent {
Comment(Locator location, char[] chars,
int start, int length)
throws SAXException {
super(location, chars, start, length);
}
}
static class EndCDATA extends Event {
EndCDATA(Locator location) {
super(location);
}
}
static class EndDTD extends Event {
EndDTD(Locator location) {
super(location);
}
}
static class EndEntity extends Event {
EndEntity(Locator location, String name) {
super(location);
this.name = name;
}
final String name;
}
static class StartCDATA extends Event {
StartCDATA(Locator location) {
super(location);
}
}
static class StartDTD extends Event {
StartDTD(Locator location, String name,
String publicId, String systemId) {
super(location);
this.name = name;
this.publicId = publicId;
this.systemId = systemId;
}
final String name;
final String publicId;
final String systemId;
}
static class StartEntity extends Event {
public StartEntity(Locator location, String name) {
super(location);
this.name = name;
}
final String name;
}
static class StartInstruction extends Event {
StartInstruction(StartElement startElement) {
super(startElement.location);
this.startElement = startElement;
}
final StartElement startElement;
EndInstruction endInstruction;
}
static class EndInstruction extends Event {
EndInstruction(Locator locator,
StartInstruction startInstruction) {
super(locator);
this.startInstruction = startInstruction;
startInstruction.endInstruction = this;
}
final StartInstruction startInstruction;
}
static class StartForEach extends StartInstruction {
StartForEach(StartElement raw,
Expression items, String var,
Expression begin, Expression end, Expression step) {
super(raw);
this.items = items;
this.var = var;
this.begin = begin;
this.end = end;
this.step = step;
}
final Expression items;
final String var;
final Expression begin;
final Expression end;
final Expression step;
}
static class StartIf extends StartInstruction {
StartIf(StartElement raw, Expression test) {
super(raw);
this.test = test;
}
final Expression test;
}
static class StartChoose extends StartInstruction {
StartChoose(StartElement raw) {
super(raw);
}
StartWhen firstChoice;
StartOtherwise otherwise;
}
static class StartWhen extends StartInstruction {
StartWhen(StartElement raw, Expression test) {
super(raw);
this.test = test;
}
final Expression test;
StartWhen nextChoice;
}
static class StartOtherwise extends StartInstruction {
StartOtherwise(StartElement raw) {
super(raw);
}
}
static class StartOut extends StartInstruction {
StartOut(StartElement raw, Expression expr) {
super(raw);
this.compiledExpression = expr;
}
final Expression compiledExpression;
}
static class StartImport extends StartInstruction {
StartImport(StartElement raw, AttributeEvent uri,
Expression select) {
super(raw);
this.uri = uri;
this.select = select;
}
final AttributeEvent uri;
final Expression select;
}
static class StartTemplate extends StartInstruction {
StartTemplate(StartElement raw) {
super(raw);
}
}
static class StartDefine extends StartInstruction {
StartDefine(StartElement raw, String namespace, String name) {
super(raw);
this.namespace = namespace;
this.name = name;
this.qname = "{"+namespace+"}"+name;
this.parameters = new HashMap();
}
final String name;
final String namespace;
final String qname;
final Map parameters;
Event body;
void finish() throws SAXException {
Event e = next;
boolean params = true;
while (e != this.endInstruction) {
if (e instanceof StartParameter) {
StartParameter startParam = (StartParameter)e;
if (!params) {
throw new SAXParseException("<parameter> not allowed here: \""+startParam.name +"\"", startParam.location, null);
}
Object prev =
parameters.put(startParam.name, startParam);
if (prev != null) {
throw new SAXParseException("duplicate parameter: \""+startParam.name +"\"", location, null);
}
e = startParam.endInstruction.next;
} else if (e instanceof IgnorableWhitespace) {
} else if (e instanceof Characters) {
// check for whitespace
char[] ch = ((TextEvent)e).raw;
for (int i = 0; i < ch.length; i++) {
if (!Character.isWhitespace(ch[i])) {
if (params) {
params = false;
body = e;
}
break;
}
}
} else {
if (params) {
params = false;
body = e;
}
}
e = e.next;
}
if (this.body == null) {
this.body = this.endInstruction;
}
}
}
static class StartParameter extends StartInstruction {
StartParameter(StartElement raw, String name, String optional,
String default_) {
super(raw);
this.name = name;
this.optional = optional;
this.default_ = default_;
}
final String name;
final String optional;
final String default_;
}
static class StartSet extends StartInstruction {
StartSet(StartElement raw, String var, Expression value) {
super(raw);
this.var = var;
this.value = value;
}
final String var;
final Expression value;
}
static class Parser implements ContentHandler, LexicalHandler {
StartDocument startEvent;
Event lastEvent;
Stack stack = new Stack();
Locator locator;
Locator charLocation;
StringBuffer charBuf;
public Parser() {
}
StartDocument getStartEvent() {
return startEvent;
}
private void addEvent(Event ev) throws SAXException {
if (ev == null) {
throw new NullPointerException("null event");
}
if (lastEvent == null) {
lastEvent = startEvent = new StartDocument(locator);
} else {
flushChars();
}
lastEvent.next = ev;
lastEvent = ev;
}
void flushChars() throws SAXException {
if (charBuf != null) {
char[] chars = new char[charBuf.length()];
charBuf.getChars(0, charBuf.length(), chars, 0);
Characters ev = new Characters(charLocation,
chars, 0, chars.length);
lastEvent.next = ev;
lastEvent = ev;
charLocation = null;
charBuf = null;
}
}
public void characters(char[] ch, int start, int length)
throws SAXException {
if (charBuf == null) {
charBuf = new StringBuffer();
if (locator != null) {
charLocation = new LocatorImpl(locator);
} else {
charLocation = NULL_LOCATOR;
}
}
charBuf.append(ch, start, length);
}
public void endDocument() throws SAXException {
StartDocument startDoc = (StartDocument)stack.pop();
EndDocument endDoc = new EndDocument(locator);
startDoc.endDocument = endDoc;
addEvent(endDoc);
}
public void endElement(String namespaceURI,
String localName,
String raw)
throws SAXException {
Event start = (Event)stack.pop();
Event newEvent = null;
if (NS.equals(namespaceURI)) {
StartInstruction startInstruction =
(StartInstruction)start;
EndInstruction endInstruction =
new EndInstruction(locator, startInstruction);
newEvent = endInstruction;
if (start instanceof StartWhen) {
StartWhen startWhen = (StartWhen)start;
StartChoose startChoose = (StartChoose)stack.peek();
if (startChoose.firstChoice != null) {
StartWhen w = startChoose.firstChoice;
while (w.nextChoice != null) {
w = w.nextChoice;
}
w.nextChoice = startWhen;
} else {
startChoose.firstChoice = startWhen;
}
} else if (start instanceof StartOtherwise) {
StartOtherwise startOtherwise =
(StartOtherwise)start;
StartChoose startChoose = (StartChoose)stack.peek();
startChoose.otherwise = startOtherwise;
}
} else {
StartElement startElement = (StartElement)start;
newEvent = startElement.endElement =
new EndElement(locator, startElement);
}
addEvent(newEvent);
if (start instanceof StartDefine) {
StartDefine startDefine = (StartDefine)start;
startDefine.finish();
}
}
public void endPrefixMapping(String prefix) throws SAXException {
EndPrefixMapping endPrefixMapping =
new EndPrefixMapping(locator, prefix);
addEvent(endPrefixMapping);
}
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
Event ev = new IgnorableWhitespace(locator, ch, start, length);
addEvent(ev);
}
public void processingInstruction(String target, String data)
throws SAXException {
Event pi = new ProcessingInstruction(locator, target, data);
addEvent(pi);
}
public void setDocumentLocator(Locator locator) {
this.locator = locator;
}
public void skippedEntity(String name) throws SAXException {
addEvent(new SkippedEntity(locator, name));
}
public void startDocument() {
startEvent = new StartDocument(locator);
lastEvent = startEvent;
stack.push(lastEvent);
}
public void startElement(String namespaceURI,
String localName,
String qname,
Attributes attrs)
throws SAXException {
Event newEvent = null;
StartElement startElement =
new StartElement(locator, namespaceURI,
localName, qname, attrs);
if (NS.equals(namespaceURI)) {
if (localName.equals(FOR_EACH)) {
String items = attrs.getValue("items");
String select = attrs.getValue("select");
Expression begin = compileInt(attrs.getValue("begin"),
FOR_EACH, locator);
Expression end = compileInt(attrs.getValue("end"),
FOR_EACH, locator);
Expression step = compileInt(attrs.getValue("step"),
FOR_EACH,
locator);
String var = attrs.getValue("var");
if (items == null) {
if (select == null && (begin == null || end == null)) {
throw new SAXParseException("forEach: \"select\", \"items\", or both \"begin\" and \"end\" must be specified", locator, null);
}
} else if (select != null) {
throw new SAXParseException("forEach: only one of \"select\" or \"items\" may be specified", locator, null);
}
Expression expr;
expr = compileExpr(items == null ? select : items,
null, locator);
StartForEach startForEach =
new StartForEach(startElement, expr,
var, begin, end, step);
newEvent = startForEach;
} else if (localName.equals(CHOOSE)) {
StartChoose startChoose = new StartChoose(startElement);
newEvent = startChoose;
} else if (localName.equals(WHEN)) {
if (stack.size() == 0 ||
!(stack.peek() instanceof StartChoose)) {
throw new SAXParseException("<when> must be within <choose>", locator, null);
}
String test = attrs.getValue("test");
if (test == null) {
throw new SAXParseException("when: \"test\" is required", locator, null);
}
Expression expr;
expr = compileExpr(test, "when: \"test\": ", locator);
StartWhen startWhen = new StartWhen(startElement, expr);
newEvent = startWhen;
} else if (localName.equals(OUT)) {
String value = attrs.getValue("value");
if (value == null) {
throw new SAXParseException("out: \"value\" is required", locator, null);
}
Expression expr = compileExpr(value,
"out: \"value\": ",
locator);
newEvent = new StartOut(startElement, expr);
} else if (localName.equals(OTHERWISE)) {
if (stack.size() == 0 ||
!(stack.peek() instanceof StartChoose)) {
throw new SAXParseException("<otherwise> must be within <choose>", locator, null);
}
StartOtherwise startOtherwise =
new StartOtherwise(startElement);
newEvent = startOtherwise;
} else if (localName.equals(IF)) {
String test = attrs.getValue("test");
if (test == null) {
throw new SAXParseException("if: \"test\" is required", locator, null);
}
Expression expr =
compileExpr(test, "if: \"test\": ", locator);
StartIf startIf =
new StartIf(startElement, expr);
newEvent = startIf;
} else if (localName.equals(MACRO)) {
// <macro name="myTag" targetNamespace="myNamespace">
// <parameter name="paramName" required="Boolean" default="value"/>
// body
// </macro>
String namespace = attrs.getValue("targetNamespace");
if (namespace == null) {
namespace = "";
}
String name = attrs.getValue("name");
if (name == null) {
throw new SAXParseException("macro: \"name\" is required", locator, null);
}
StartDefine startDefine =
new StartDefine(startElement, namespace, name);
newEvent = startDefine;
} else if (localName.equals(PARAMETER)) {
boolean syntaxErr = false;
if (stack.size() < 1 ||
!(stack.peek() instanceof StartDefine)) {
syntaxErr = true;
} else {
StartDefine startDefine = (StartDefine)stack.peek();
String name = attrs.getValue("name");
String optional = attrs.getValue("optional");
String default_ = attrs.getValue("default");
if (name == null) {
throw new SAXParseException("parameter: \"name\" is required", locator, null);
}
StartParameter startParameter =
new StartParameter(startElement,
name, optional, default_);
newEvent = startParameter;
}
if (syntaxErr) {
throw new SAXParseException("<parameter> not allowed here", locator, null);
}
} else if (localName.equals(SET)) {
String var = attrs.getValue("var");
String value = attrs.getValue("value");
Expression valueExpr = null;
if (value != null) {
valueExpr =
compileExpr(value, "set: \"value\":",
locator);
}
StartSet startSet = new StartSet(startElement, var, valueExpr);
newEvent = startSet;
} else if (localName.equals(IMPORT)) {
// <import uri="${root}/foo/bar.xml" context="${foo}"/>
AttributeEvent uri = null;
Iterator iter = startElement.attributeEvents.iterator();
while (iter.hasNext()) {
AttributeEvent e = (AttributeEvent)iter.next();
if (e.localName.equals("uri")) {
uri = e;
break;
}
}
if (uri == null) {
throw new SAXParseException("import: \"uri\" is required", locator, null);
}
// If "context" is present then its value will be used
// as the context object in the imported template
String select = attrs.getValue("context");
Expression expr = null;
if (select != null) {
expr =
compileExpr(select, "import: \"context\": ",
locator);
}
StartImport startImport =
new StartImport(startElement, uri, expr);
newEvent = startImport;
} else if (localName.equals(TEMPLATE)) {
StartTemplate startTemplate =
new StartTemplate(startElement);
newEvent = startTemplate;
} else {
throw new SAXParseException("unrecognized tag: " + localName, locator, null);
}
} else {
newEvent = startElement;
}
stack.push(newEvent);
addEvent(newEvent);
}
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
addEvent(new StartPrefixMapping(locator, prefix, uri));
}
public void comment(char ch[], int start, int length)
throws SAXException {
addEvent(new Comment(locator, ch, start, length));
}
public void endCDATA() throws SAXException {
addEvent(new EndCDATA(locator));
}
public void endDTD() throws SAXException {
addEvent(new EndDTD(locator));
}
public void endEntity(String name) throws SAXException {
addEvent(new EndEntity(locator, name));
}
public void startCDATA() throws SAXException {
addEvent(new StartCDATA(locator));
}
public void startDTD(String name, String publicId, String systemId)
throws SAXException {
addEvent(new StartDTD(locator, name, publicId, systemId));
}
public void startEntity(String name) throws SAXException {
addEvent(new StartEntity(locator, name));
}
}
/**
* Adapter that makes this generator usable as a transformer
* (Note there is a performance penalty for this however:
* you effectively recompile the template for every instance document)
*/
public static class TransformerAdapter extends AbstractTransformer {
static class TemplateConsumer extends Parser implements XMLConsumer {
public TemplateConsumer(SourceResolver resolver, Map objectModel,
String src, Parameters parameters)
throws ProcessingException, SAXException, IOException {
this.gen = new JXTemplateGenerator();
this.gen.setup(resolver, objectModel, null, parameters);
}
public void endDocument() throws SAXException {
super.endDocument();
gen.execute(gen.getConsumer(),
gen.getJexlContext(),
gen.getJXPathContext(),
getStartEvent(), null);
}
void setConsumer(XMLConsumer consumer) {
gen.setConsumer(consumer);
}
JXTemplateGenerator gen;
}
TemplateConsumer templateConsumer;
public void recycle() {
super.recycle();
templateConsumer = null;
}
public void setup(SourceResolver resolver, Map objectModel,
String src, Parameters parameters)
throws ProcessingException, SAXException, IOException {
templateConsumer = new TemplateConsumer(resolver, objectModel,
src,
parameters);
}
public void setConsumer(XMLConsumer xmlConsumer) {
super.setConsumer(templateConsumer);
templateConsumer.setConsumer(xmlConsumer);
}
}
private XMLConsumer consumer;
private JXPathContext jxpathContext;
private MyJexlContext globalJexlContext;
private Variables variables;
private static Map cache = new HashMap();
private Source inputSource;
private Map definitions;
private JXPathContext getJXPathContext() {
return jxpathContext;
}
private MyJexlContext getJexlContext() {
return globalJexlContext;
}
private XMLConsumer getConsumer() {
return consumer;
}
public void recycle() {
super.recycle();
consumer = null;
jxpathContext = null;
globalJexlContext = null;
variables = null;
inputSource = null;
definitions = null;
}
public void setup(SourceResolver resolver, Map objectModel,
String src, Parameters parameters)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, parameters);
if (src != null) {
try {
this.inputSource = resolver.resolveURI(src);
} catch (SourceException se) {
throw SourceUtil.handle("Error during resolving of '" + src + "'.", se);
}
long lastMod = inputSource.getLastModified();
String uri = inputSource.getURI();
synchronized (cache) {
StartDocument startEvent = (StartDocument)cache.get(uri);
if (startEvent != null &&
lastMod > startEvent.compileTime) {
cache.remove(uri);
}
}
}
Object bean = FlowHelper.getContextObject(objectModel);
WebContinuation kont = FlowHelper.getWebContinuation(objectModel);
setContexts(bean, kont,
ObjectModelHelper.getRequest(objectModel),
ObjectModelHelper.getResponse(objectModel),
ObjectModelHelper.getContext(objectModel),
parameters,
objectModel);
definitions = new HashMap();
}
private void fillContext(Object contextObject, Map map) {
if (contextObject == null) return;
// Hack: I use jxpath to populate the context object's properties
// in the jexl context
final JXPathBeanInfo bi =
JXPathIntrospector.getBeanInfo(contextObject.getClass());
if (bi.isDynamic()) {
Class cl = bi.getDynamicPropertyHandlerClass();
try {
DynamicPropertyHandler h = (DynamicPropertyHandler) cl.newInstance();
String[] result = h.getPropertyNames(contextObject);
for (int i = 0; i < result.length; i++) {
try {
map.put(result[i], h.getProperty(contextObject, result[i]));
} catch (Exception exc) {
exc.printStackTrace();
}
}
} catch (Exception ignored) {
ignored.printStackTrace();
}
} else {
PropertyDescriptor[] props = bi.getPropertyDescriptors();
for (int i = 0; i < props.length; i++) {
try {
Method read = props[i].getReadMethod();
if (read != null) {
map.put(props[i].getName(),
read.invoke(contextObject, null));
}
} catch (Exception ignored) {
ignored.printStackTrace();
}
}
}
}
private void setContexts(Object contextObject,
WebContinuation kont,
Request request,
Response response,
org.apache.cocoon.environment.Context app,
Parameters parameters,
Map objectModel) {
if (variables == null) {
variables = new MyVariables(contextObject,
kont,
request,
response,
app,
parameters);
}
Map map;
if (contextObject instanceof Map) {
map = (Map)contextObject;
} else {
map = new HashMap();
fillContext(contextObject, map);
}
jxpathContext = jxpathContextFactory.newContext(null, contextObject);
jxpathContext.setVariables(variables);
globalJexlContext = new MyJexlContext();
globalJexlContext.setVars(map);
map = globalJexlContext.getVars();
if (contextObject != null) {
map.put("flowContext", contextObject);
map.put("continuation", kont);
// FIXME (VG): Is this required (what it's used for - examples)?
// Here I use Rhino's live-connect objects to allow Jexl to call
// java constructors
Object javaPkg = JavaScriptFlow.getJavaPackage(objectModel);
Object pkgs = JavaScriptFlow.getPackages(objectModel);
map.put("java", javaPkg);
map.put("Packages", pkgs);
}
map.put("request", request);
map.put("response", response);
map.put("context", app);
Object session = request.getSession(false);
if (session != null) {
map.put("session", session);
}
}
public void setConsumer(XMLConsumer consumer) {
this.consumer = consumer;
}
public void generate()
throws IOException, SAXException, ProcessingException {
StartDocument startEvent;
synchronized (cache) {
startEvent = (StartDocument)cache.get(inputSource.getURI());
}
if (startEvent == null) {
long compileTime = inputSource.getLastModified();
Parser parser = new Parser();
SourceUtil.parse(this.manager, this.inputSource, parser);
startEvent = parser.getStartEvent();
startEvent.compileTime = compileTime;
synchronized (cache) {
cache.put(inputSource.getURI(), startEvent);
}
}
execute(consumer,
globalJexlContext, jxpathContext,
startEvent, null);
}
interface CharHandler {
public void characters(char[] ch, int offset, int length)
throws SAXException;
}
private void characters(JexlContext jexlContext,
JXPathContext jxpathContext,
TextEvent event,
CharHandler handler) throws SAXException {
Iterator iter = event.substitutions.iterator();
while (iter.hasNext()) {
Object subst = iter.next();
char[] chars;
if (subst instanceof char[]) {
chars = (char[])subst;
} else {
Expression expr = (Expression)subst;
try {
Object val = getValue(expr, jexlContext, jxpathContext);
if (val != null) {
chars = val.toString().toCharArray();
} else {
chars = EMPTY_CHARS;
}
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
event.location,
e);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
event.location,
null);
}
}
handler.characters(chars, 0, chars.length);
}
}
private void executeRaw(final XMLConsumer consumer,
Event startEvent, Event endEvent)
throws SAXException {
Event ev = startEvent;
while (ev != endEvent) {
consumer.setDocumentLocator(ev.location);
if (ev instanceof Characters) {
TextEvent text = (TextEvent)ev;
consumer.characters(text.raw, 0, text.raw.length);
} else if (ev instanceof EndDocument) {
consumer.endDocument();
} else if (ev instanceof StartElement) {
StartElement startElement =
(StartElement)ev;
consumer.startElement(startElement.namespaceURI,
startElement.localName,
startElement.raw,
startElement.attributes);
} else if (ev instanceof EndElement) {
EndElement endElement = (EndElement)ev;
StartElement startElement =
(StartElement)endElement.startElement;
consumer.endElement(startElement.namespaceURI,
startElement.localName,
startElement.raw);
} else if (ev instanceof EndPrefixMapping) {
EndPrefixMapping endPrefixMapping =
(EndPrefixMapping)ev;
consumer.endPrefixMapping(endPrefixMapping.prefix);
} else if (ev instanceof IgnorableWhitespace) {
TextEvent text = (TextEvent)ev;
consumer.ignorableWhitespace(text.raw, 0, text.raw.length);
} else if (ev instanceof ProcessingInstruction) {
ProcessingInstruction pi = (ProcessingInstruction)ev;
consumer.processingInstruction(pi.target, pi.data);
} else if (ev instanceof SkippedEntity) {
SkippedEntity skippedEntity = (SkippedEntity)ev;
consumer.skippedEntity(skippedEntity.name);
} else if (ev instanceof StartDocument) {
StartDocument startDoc = (StartDocument)ev;
if (startDoc.endDocument != null) {
// if this isn't a document fragment
consumer.startDocument();
}
} else if (ev instanceof StartPrefixMapping) {
StartPrefixMapping startPrefixMapping =
(StartPrefixMapping)ev;
consumer.startPrefixMapping(startPrefixMapping.prefix,
startPrefixMapping.uri);
} else if (ev instanceof Comment) {
TextEvent text = (TextEvent)ev;
consumer.comment(text.raw, 0, text.raw.length);
} else if (ev instanceof EndCDATA) {
consumer.endCDATA();
} else if (ev instanceof EndDTD) {
consumer.endDTD();
} else if (ev instanceof EndEntity) {
consumer.endEntity(((EndEntity)ev).name);
} else if (ev instanceof StartCDATA) {
consumer.startCDATA();
} else if (ev instanceof StartDTD) {
StartDTD startDTD = (StartDTD)ev;
consumer.startDTD(startDTD.name,
startDTD.publicId,
startDTD.systemId);
} else if (ev instanceof StartEntity) {
consumer.startEntity(((StartEntity)ev).name);
} else if (ev instanceof StartInstruction) {
StartInstruction startInstruction = (StartInstruction)ev;
StartElement startElement = startInstruction.startElement;
consumer.startElement(startElement.namespaceURI,
startElement.localName,
startElement.raw,
startElement.attributes);
} else if (ev instanceof EndInstruction) {
EndInstruction endInstruction = (EndInstruction)ev;
StartInstruction startInstruction =
endInstruction.startInstruction;
StartElement startElement = startInstruction.startElement;
consumer.endElement(startElement.namespaceURI,
startElement.localName,
startElement.raw);
}
ev = ev.next;
}
}
private void executeDOM(final XMLConsumer consumer,
MyJexlContext jexlContext,
JXPathContext jxpathContext,
Node node) throws SAXException {
Parser parser = new Parser();
DOMStreamer streamer = new DOMStreamer(parser);
streamer.stream(node);
execute(consumer,
jexlContext,
jxpathContext,
parser.getStartEvent(), null);
}
private void call(Locator location,
String messagePrefix,
final XMLConsumer consumer,
MyJexlContext jexlContext,
JXPathContext jxpathContext,
Event startEvent, Event endEvent)
throws SAXException {
try {
execute(consumer, jexlContext,
jxpathContext, startEvent, endEvent);
} catch (SAXParseException exc) {
throw new SAXParseException(messagePrefix +": " +exc.getMessage(),
location,
exc);
}
}
private void execute(final XMLConsumer consumer,
MyJexlContext jexlContext,
JXPathContext jxpathContext,
Event startEvent, Event endEvent)
throws SAXException {
Event ev = startEvent;
while (ev != endEvent) {
consumer.setDocumentLocator(ev.location);
if (ev instanceof Characters) {
TextEvent text = (TextEvent)ev;
Iterator iter = text.substitutions.iterator();
while (iter.hasNext()) {
Object subst = iter.next();
char[] chars;
if (subst instanceof char[]) {
chars = (char[])subst;
} else {
Expression expr = (Expression)subst;
try {
Object val =
getNode(expr, jexlContext, jxpathContext);
if (val instanceof Node) {
executeDOM(consumer,
jexlContext,
jxpathContext,
(Node)val);
continue;
} else if (val instanceof NodeList) {
NodeList nodeList = (NodeList)val;
for (int i = 0, len = nodeList.getLength();
i < len; i++) {
Node n = nodeList.item(i);
executeDOM(consumer, jexlContext,
jxpathContext, n);
}
continue;
} else if (val instanceof Node[]) {
Node[] nodeList = (Node[])val;
for (int i = 0, len = nodeList.length;
i < len; i++) {
Node n = nodeList[i];
executeDOM(consumer, jexlContext,
jxpathContext, n);
}
continue;
}
if (val != null) {
chars = val.toString().toCharArray();
} else {
chars = EMPTY_CHARS;
}
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
ev.location,
null);
}
}
consumer.characters(chars, 0, chars.length);
}
} else if (ev instanceof EndDocument) {
consumer.endDocument();
} else if (ev instanceof EndElement) {
EndElement endElement = (EndElement)ev;
StartElement startElement =
(StartElement)endElement.startElement;
consumer.endElement(startElement.namespaceURI,
startElement.localName,
startElement.raw);
} else if (ev instanceof EndPrefixMapping) {
EndPrefixMapping endPrefixMapping =
(EndPrefixMapping)ev;
consumer.endPrefixMapping(endPrefixMapping.prefix);
} else if (ev instanceof IgnorableWhitespace) {
TextEvent text = (TextEvent)ev;
characters(jexlContext,
jxpathContext,
text,
new CharHandler() {
public void characters(char[] ch, int offset,
int len)
throws SAXException {
consumer.ignorableWhitespace(ch, offset, len);
}
});
} else if (ev instanceof ProcessingInstruction) {
ProcessingInstruction pi = (ProcessingInstruction)ev;
consumer.processingInstruction(pi.target, pi.data);
} else if (ev instanceof SkippedEntity) {
SkippedEntity skippedEntity = (SkippedEntity)ev;
consumer.skippedEntity(skippedEntity.name);
} else if (ev instanceof StartDocument) {
StartDocument startDoc = (StartDocument)ev;
if (startDoc.endDocument != null) {
// if this isn't a document fragment
consumer.startDocument();
}
} else if (ev instanceof StartIf) {
StartIf startIf = (StartIf)ev;
Object val;
try {
val = getValue(startIf.test, jexlContext, jxpathContext);
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
ev.location,
null);
}
boolean result = false;
if (val instanceof Boolean) {
result = ((Boolean)val).booleanValue();
} else {
result = (val != null);
}
if (!result) {
ev = startIf.endInstruction.next;
continue;
}
} else if (ev instanceof StartForEach) {
StartForEach startForEach = (StartForEach)ev;
final Object items = startForEach.items;
Iterator iter = null;
boolean xpath = false;
int begin, end, step;
try {
if (items == null) {
iter = NULL_ITER;
} else {
Expression expr = (Expression)items;
if (expr.compiledExpression instanceof CompiledExpression) {
CompiledExpression compiledExpression =
(CompiledExpression)expr.compiledExpression;
Object val =
compiledExpression.getPointer(jxpathContext,
expr.raw).getNode();
// Hack: workaround for JXPath bug
if (val instanceof NativeArray) {
iter =
new JSIntrospector.NativeArrayIterator((NativeArray)val);
} else {
iter =
compiledExpression.iteratePointers(jxpathContext);
xpath = true;
}
} else if (expr.compiledExpression instanceof org.apache.commons.jexl.Expression) {
org.apache.commons.jexl.Expression e =
(org.apache.commons.jexl.Expression)expr.compiledExpression;
Object result = e.evaluate(jexlContext);
if (result != null) {
iter =
org.apache.commons.jexl.util.Introspector.getUberspect().getIterator(result, new Info(ev.location.getSystemId(),
ev.location.getLineNumber(),
ev.location.getColumnNumber()));
}
if (iter == null) {
iter = EMPTY_ITER;
}
} else {
// literal value
iter = new Iterator() {
Object val = items;
public boolean hasNext() {
return val != null;
}
public Object next() {
Object res = val;
val = null;
return res;
}
public void remove() {
}
};
}
}
begin = startForEach.begin == null ? 0 :
getIntValue(startForEach.begin, jexlContext, jxpathContext);
end = startForEach.end == null ? Integer.MAX_VALUE :
getIntValue(startForEach.end, jexlContext,
jxpathContext);
step = startForEach.step == null ? 1 :
getIntValue(startForEach.step, jexlContext,
jxpathContext);
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
ev.location,
null);
}
int i;
MyJexlContext localJexlContext =
new MyJexlContext(jexlContext);
for (i = 0; i < begin && iter.hasNext(); i++) {
iter.next();
}
for (; i <= end && iter.hasNext(); i++) {
Object value;
if (xpath) {
Pointer ptr = (Pointer)iter.next();
try {
value = ptr.getNode();
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
}
} else {
value = iter.next();
}
JXPathContext localJXPathContext =
jxpathContextFactory.newContext(null, value);
localJXPathContext.setVariables(variables);
if (startForEach.var != null) {
localJexlContext.put(startForEach.var, value);
}
execute(consumer,
localJexlContext,
localJXPathContext,
startForEach.next,
startForEach.endInstruction);
for (int skip = step-1;
skip > 0 && iter.hasNext(); --skip) {
iter.next();
}
}
ev = startForEach.endInstruction.next;
continue;
} else if (ev instanceof StartChoose) {
StartChoose startChoose = (StartChoose)ev;
StartWhen startWhen = startChoose.firstChoice;
for (;startWhen != null; startWhen = startWhen.nextChoice) {
Object val;
try {
val = getValue(startWhen.test, jexlContext,
jxpathContext);
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
}
boolean result = false;
if (val instanceof Boolean) {
result = ((Boolean)val).booleanValue();
} else {
result = (val != null);
}
if (result) {
execute(consumer,
jexlContext, jxpathContext,
startWhen.next, startWhen.endInstruction);
break;
}
}
if (startWhen == null) {
if (startChoose.otherwise != null) {
execute(consumer,
jexlContext, jxpathContext,
startChoose.otherwise.next,
startChoose.otherwise.endInstruction);
}
}
ev = startChoose.endInstruction.next;
continue;
} else if (ev instanceof StartSet) {
StartSet startSet = (StartSet)ev;
Object value = null;
if (startSet.value != null) {
try {
value = getNode(startSet.value,
jexlContext, jxpathContext);
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
}
} else {
DOMBuilder builder = new DOMBuilder();
builder.startDocument();
builder.startElement(NS,
"set",
"set",
EMPTY_ATTRS);
execute(builder, jexlContext, jxpathContext,
startSet.next,
startSet.endInstruction);
builder.endElement(NS,
"set",
"set");
builder.endDocument();
Node node = builder.getDocument().getDocumentElement();
NodeList nodeList = node.getChildNodes();
int len = nodeList.getLength();
// JXPath doesn't handle NodeList, so convert
// it to an array
Node[] nodeArr = new Node[len];
for (int i = 0; i < len; i++) {
nodeArr[i] = nodeList.item(i);
}
value = nodeArr;
}
jxpathContext.getVariables().declareVariable(startSet.var,
value);
jexlContext.put(startSet.var, value);
ev = startSet.endInstruction.next;
continue;
} else if (ev instanceof StartElement) {
StartElement startElement = (StartElement)ev;
StartDefine def =
(StartDefine)definitions.get(startElement.qname);
if (def != null) {
Map attributeMap = new HashMap();
Iterator i = startElement.attributeEvents.iterator();
while (i.hasNext()) {
String attributeName;
Object attributeValue;
AttributeEvent attrEvent = (AttributeEvent)
i.next();
attributeName = attrEvent.localName;
if (attrEvent instanceof CopyAttribute) {
CopyAttribute copy =
(CopyAttribute)attrEvent;
attributeValue = copy.value;
} else if (attrEvent instanceof
SubstituteAttribute) {
SubstituteAttribute substEvent =
(SubstituteAttribute)attrEvent;
if (substEvent.substitutions.size() == 1 &&
substEvent.substitutions.get(0) instanceof
Expression) {
Expression expr = (Expression)
substEvent.substitutions.get(0);
Object val;
try {
val =
getNode(expr,
jexlContext,
jxpathContext);
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
}
if (val == null) {
val = "";
}
attributeValue = val;
} else {
StringBuffer buf = new StringBuffer();
Iterator ii = substEvent.substitutions.iterator();
while (ii.hasNext()) {
Subst subst = (Subst)ii.next();
if (subst instanceof Literal) {
Literal lit = (Literal)subst;
buf.append(lit.value);
} else if (subst instanceof Expression) {
Expression expr = (Expression)subst;
Object val;
try {
val =
getValue(expr,
jexlContext,
jxpathContext);
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
}
if (val == null) {
val = "";
}
buf.append(val.toString());
}
}
attributeValue = buf.toString();
}
} else {
throw new Error("this shouldn't have happened");
}
attributeMap.put(attributeName, attributeValue);
}
DOMBuilder builder = new DOMBuilder();
builder.startDocument();
builder.startElement(startElement.namespaceURI,
startElement.localName,
startElement.raw,
EMPTY_ATTRS);
executeRaw(builder,
startElement.next,
startElement.endElement);
builder.endElement(startElement.namespaceURI,
startElement.localName,
startElement.raw);
builder.endDocument();
Node node = builder.getDocument().getDocumentElement();
MyVariables vars =
(MyVariables)jxpathContext.getVariables();
Map saveLocals = vars.localVariables;
vars.localVariables = new HashMap();
MyJexlContext localJexlContext =
new MyJexlContext(globalJexlContext);
// JXPath doesn't handle NodeList, so convert it to
// an array
NodeList children = node.getChildNodes();
int len = children.getLength();
Node[] arr = new Node[len];
for (int ii = 0; ii < len; ii++) {
arr[ii] = children.item(ii);
}
localJexlContext.put("content", arr);
vars.localVariables.put("content", arr);
Iterator iter = def.parameters.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry e = (Map.Entry)iter.next();
String key = (String)e.getKey();
StartParameter startParam =
(StartParameter)e.getValue();
Object default_ = startParam.default_;
Object val = attributeMap.get(key);
if (val == null) {
val = default_;
}
localJexlContext.put(key, val);
vars.localVariables.put(key, val);
}
JXPathContext localJXPathContext =
jxpathContextFactory.newContext(null, arr);
localJXPathContext.setVariables(vars);
call(ev.location,
startElement.localName,
consumer,
localJexlContext, localJXPathContext,
def.body, def.endInstruction);
vars.localVariables = saveLocals;
ev = startElement.endElement.next;
continue;
}
Iterator i = startElement.attributeEvents.iterator();
AttributesImpl attrs = new AttributesImpl();
while (i.hasNext()) {
AttributeEvent attrEvent = (AttributeEvent)
i.next();
if (attrEvent instanceof CopyAttribute) {
CopyAttribute copy =
(CopyAttribute)attrEvent;
attrs.addAttribute(copy.namespaceURI,
copy.localName,
copy.raw,
copy.type,
copy.value);
} else if (attrEvent instanceof
SubstituteAttribute) {
StringBuffer buf = new StringBuffer();
SubstituteAttribute substEvent =
(SubstituteAttribute)attrEvent;
Iterator ii = substEvent.substitutions.iterator();
while (ii.hasNext()) {
Subst subst = (Subst)ii.next();
if (subst instanceof Literal) {
Literal lit = (Literal)subst;
buf.append(lit.value);
} else if (subst instanceof Expression) {
Expression expr = (Expression)subst;
Object val;
try {
val =
getValue(expr,
jexlContext,
jxpathContext);
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
}
if (val == null) {
val = "";
}
buf.append(val.toString());
}
}
attrs.addAttribute(attrEvent.namespaceURI,
attrEvent.localName,
attrEvent.raw,
attrEvent.type,
buf.toString());
}
}
consumer.startElement(startElement.namespaceURI,
startElement.localName,
startElement.raw,
attrs);
} else if (ev instanceof StartPrefixMapping) {
StartPrefixMapping startPrefixMapping =
(StartPrefixMapping)ev;
consumer.startPrefixMapping(startPrefixMapping.prefix,
startPrefixMapping.uri);
} else if (ev instanceof Comment) {
TextEvent text = (TextEvent)ev;
final StringBuffer buf = new StringBuffer();
characters(jexlContext,
jxpathContext,
text,
new CharHandler() {
public void characters(char[] ch, int offset,
int len)
throws SAXException {
buf.append(ch, offset, len);
}
});
char[] chars = new char[buf.length()];
buf.getChars(0, chars.length, chars, 0);
consumer.comment(chars, 0, chars.length);
} else if (ev instanceof EndCDATA) {
consumer.endCDATA();
} else if (ev instanceof EndDTD) {
consumer.endDTD();
} else if (ev instanceof EndEntity) {
consumer.endEntity(((EndEntity)ev).name);
} else if (ev instanceof StartCDATA) {
consumer.startCDATA();
} else if (ev instanceof StartDTD) {
StartDTD startDTD = (StartDTD)ev;
consumer.startDTD(startDTD.name,
startDTD.publicId,
startDTD.systemId);
} else if (ev instanceof StartEntity) {
consumer.startEntity(((StartEntity)ev).name);
} else if (ev instanceof StartOut) {
StartOut startOut = (StartOut)ev;
Object val;
try {
val = getNode(startOut.compiledExpression,
jexlContext,
jxpathContext);
if (val instanceof Node) {
executeDOM(consumer,
jexlContext,
jxpathContext,
(Node)val);
} else if (val instanceof NodeList) {
NodeList nodeList = (NodeList)val;
for (int i = 0, len = nodeList.getLength();
i < len; i++) {
Node n = nodeList.item(i);
executeDOM(consumer, jexlContext,
jxpathContext, n);
}
} else if (val instanceof Node[]) {
Node[] nodeList = (Node[])val;
for (int i = 0, len = nodeList.length;
i < len; i++) {
Node n = nodeList[i];
executeDOM(consumer, jexlContext,
jxpathContext, n);
}
} else {
if (val == null) {
val = "";
}
char[] ch = val.toString().toCharArray();
consumer.characters(ch, 0, ch.length);
}
} catch (Exception e) {
throw new SAXParseException(e.getMessage(),
ev.location,
e);
}
} else if (ev instanceof StartTemplate) {
} else if (ev instanceof StartDefine) {
StartDefine startDefine = (StartDefine)ev;
definitions.put(startDefine.qname, startDefine);
ev = startDefine.endInstruction.next;
continue;
} else if (ev instanceof StartImport) {
StartImport startImport = (StartImport)ev;
String uri;
AttributeEvent e = startImport.uri;
if (e instanceof CopyAttribute) {
CopyAttribute copy = (CopyAttribute)e;
uri = copy.value;
} else {
StringBuffer buf = new StringBuffer();
SubstituteAttribute substAttr = (SubstituteAttribute)e;
Iterator i = substAttr.substitutions.iterator();
while (i.hasNext()) {
Subst subst = (Subst)i.next();
if (subst instanceof Literal) {
Literal lit = (Literal)subst;
buf.append(lit.value);
} else if (subst instanceof Expression) {
Expression expr = (Expression)subst;
Object val;
try {
val =
getValue(expr,
jexlContext,
jxpathContext);
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
ev.location,
null);
}
if (val == null) {
val = "";
}
buf.append(val.toString());
}
}
uri = buf.toString();
}
Source input;
try {
input = resolver.resolveURI(uri);
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
}
long lastMod = input.getLastModified();
StartDocument doc;
synchronized (cache) {
doc = (StartDocument)cache.get(input.getURI());
if (doc != null) {
if (doc.compileTime < lastMod) {
doc = null; // recompile
}
}
}
if (doc == null) {
try {
Parser parser = new Parser();
SourceUtil.parse(this.manager, input, parser);
doc = parser.getStartEvent();
doc.compileTime = lastMod;
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
}
synchronized (cache) {
cache.put(input.getURI(), doc);
}
}
JXPathContext selectJXPath = jxpathContext;
MyJexlContext selectJexl = jexlContext;
if (startImport.select != null) {
try {
Object obj = getValue(startImport.select,
jexlContext,
jxpathContext);
selectJXPath =
jxpathContextFactory.newContext(null, obj);
selectJXPath.setVariables(variables);
selectJexl = new MyJexlContext(globalJexlContext);
fillContext(obj, selectJexl);
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(),
ev.location,
exc);
} catch (Error err) {
throw new SAXParseException(err.getMessage(),
ev.location,
null);
}
}
execute(consumer, selectJexl, selectJXPath, doc.next,
doc.endDocument);
ev = startImport.endInstruction.next;
continue;
}
ev = ev.next;
}
}
}