/*******************************************************************************
* Copyright (c) 2007 Oracle Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Cameron Bateman/Oracle - initial API and implementation
*
********************************************************************************/
package org.eclipse.jst.jsf.validation.internal.appconfig;
import java.io.StringReader;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jdt.core.Flags;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.ITypeHierarchy;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.Signature;
import org.eclipse.jst.jsf.common.internal.types.TypeConstants;
import org.eclipse.jst.jsf.common.util.TypeUtil;
import org.eclipse.jst.jsf.core.JSFVersion;
import org.eclipse.jst.jsf.core.internal.JSFCorePlugin;
import org.eclipse.jst.jsf.facesconfig.emf.ListEntriesType;
import org.eclipse.jst.jsf.facesconfig.emf.ManagedBeanScopeType;
import org.eclipse.jst.jsf.facesconfig.emf.MapEntriesType;
import org.eclipse.jst.jsp.core.internal.java.jspel.JSPELParser;
import org.eclipse.jst.jsp.core.internal.java.jspel.ParseException;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;
import org.eclipse.wst.xml.core.internal.emf2xml.EMF2DOMSSEAdapter;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
import org.w3c.dom.Node;
/**
* Common functions for app config validation
*
* @author cbateman
*
*/
public final class AppConfigValidationUtil
{
/**
* Per the fully-qualified-classType in the Faces 1.2 schema and
* the ClassName entity in the 1.1 DTD
*
* @param fullyQualifiedName
* @param instanceOf
* @param mustBeAClass
* @param project
* @return null if no problems or a Message if problem found
*/
public static IMessage validateClassName(final String fullyQualifiedName,
final String instanceOf,
final boolean mustBeAClass,
final IProject project)
{
try
{
IType type = getType(project, fullyQualifiedName);
if (type == null || !type.exists())
{
return DiagnosticFactory
.create_CANNOT_FIND_CLASS_NAME(fullyQualifiedName);
}
// must be a class, not an interface or enum
if (mustBeAClass && !type.isClass())
{
return DiagnosticFactory
.create_FULLY_QUALIFIED_NAME_MUST_BE_A_CLASS
(fullyQualifiedName);
}
// must not be abstract since it must instantiable
if (Flags.isAbstract(type.getFlags()))
{
return DiagnosticFactory
.create_CLASS_MUST_BE_CONCRETE(fullyQualifiedName);
}
if (instanceOf != null)
{
if (!isInstanceOf(type, instanceOf))
{
// if we get to here, we haven't found the expected
// the super type so error
return DiagnosticFactory.create_CLASS_MUST_BE_INSTANCE_OF
(fullyQualifiedName, Messages.AppConfigValidationUtil_0, instanceOf);
}
}
}
catch(JavaModelException jme)
{
// fall-through, not found
JSFCorePlugin.log(jme,
"Error resolving fully qualified class name: "+fullyQualifiedName); //$NON-NLS-1$
}
// either found the class or had an exception so don't report error
return null;
}
private static IType getType(final IProject project,
final String fullyQualifiedName) throws JavaModelException
{
final IJavaProject javaProject = JavaCore.create(project);
return javaProject.findType(fullyQualifiedName);
}
/**
* Per the faces-config-el-expressionType in the Faces 1.2 schema and
* the Action entity in the 1.1 DTD
*
* @param textContent
* @return an validation diagnostic or null if the textContent
* represent an expected EL expression
*/
public static IMessage validateELExpression(final String textContent)
{
final ELResultWrapper result = extractELExpression(textContent);
if (result.elText != null)
{
JSPELParser parser = new JSPELParser(new StringReader(result.elText));
try {
parser.Expression();
} catch (ParseException e) {
// syntax error
return DiagnosticFactory.create_SYNTAX_ERROR_IN_EL();
}
return null;
}
return result.message;
}
/**
* @param textContent
* @return the result of trying to extract an EL expression from the
* textContent string. The content is expected to be of the form
* #{elText}. elText in the return value will be set to this value
* from within the braces. If a syntax error occurs in this extraction
* message property of the result object will contain a validation message
* and elText will be set to null.
* TODO: move this somewhere more generic and shared.
*/
public static ELResultWrapper extractELExpression(final String textContent)
{
final String elRegex = "#\\{(.*)\\}"; //$NON-NLS-1$
Pattern pattern = Pattern.compile(elRegex);
Matcher matcher = pattern.matcher(textContent.trim());
if (matcher.matches())
{
final String elText = matcher.group(1).trim();
if ("".equals(elText) || elText == null) //$NON-NLS-1$
{
return new ELResultWrapper(DiagnosticFactory.create_SYNTAX_ERROR_IN_EL(), null);
}
return new ELResultWrapper(null, elText);
}
return new ELResultWrapper(DiagnosticFactory.create_EL_EXPR_MUST_BE_IN_HASH_BRACES(), null);
}
/**
* Value object that wraps the result of trying
* to extract an EL expression from an arbitrary String
*/
public static class ELResultWrapper
{
private final IMessage message;
private final String elText;
ELResultWrapper(IMessage message, String elText) {
super();
this.message = message;
this.elText = elText;
}
/**
* @return a message indicating a problem encountered
* trying to extract, or null if no problem was encountered
*/
public IMessage getMessage() {
return message;
}
/**
* @return the el expression string raw, stripped of any
* sorrounding #{} syntax or null if could not be extracted
*/
public String getElText() {
return elText;
}
}
/**
* @param eObj
* @return the offset character offset in to the XML document of the
* XML node that eObj was constructed from or -1 if not
* computable
*/
public static int getStartOffset(EObject eObj)
{
IDOMNode node = getDomNode(eObj);
if (node != null)
{
return node.getStartStructuredDocumentRegion().getStartOffset();
}
return -1;
}
/**
* @param eObj
* @return the length in characters of the XML node that
* eObj was constructed from or -1 if no computable
*/
public static int getLength(EObject eObj)
{
IDOMNode node = getDomNode(eObj);
if (node != null)
{
if(node.getEndStructuredDocumentRegion() != null) {
return node.getEndStructuredDocumentRegion().getEndOffset()
- node.getStartStructuredDocumentRegion().getStartOffset();
}
return node.getStartStructuredDocumentRegion().getLength();
}
return -1;
}
/**
* @param eObj
* @return the DOM node that eObj was constructed from or
* null if not computable
*/
public static IDOMNode getDomNode(EObject eObj)
{
for (Iterator it = eObj.eAdapters().iterator(); it.hasNext();)
{
Adapter adapter = (Adapter) it.next();
if (adapter instanceof EMF2DOMSSEAdapter)
{
final EMF2DOMSSEAdapter sseAdapter = (EMF2DOMSSEAdapter) adapter;
final Node node = sseAdapter.getNode();
if (node instanceof IDOMNode)
{
return (IDOMNode) node;
}
}
}
return null;
}
/**
* @param scope
* @param file
* @param version
* @return an error message if scope does not match a valid
* scope enum.
*/
public static IMessage validateManagedBeanScope(ManagedBeanScopeType scope, IFile file, JSFVersion version)
{
// scope must be one of a few enums
if (!"request".equals(scope.getTextContent()) //$NON-NLS-1$
&& !"session".equals(scope.getTextContent()) //$NON-NLS-1$
&& !"application".equals(scope.getTextContent()) //$NON-NLS-1$
&& !"none".equals(scope.getTextContent())//$NON-NLS-1$
&& ((version == null) || !((version.compareTo(JSFVersion.V2_0) >=0) && "view".equals(scope.getTextContent()) ))) //$NON-NLS-1$
{
return DiagnosticFactory.create_BEAN_SCOPE_NOT_VALID();
}
return null;
}
/**
* @param targetName
* @param targetType the type of the object that mapEntries will be assigned to
* @param mapEntries
* @param project
* @return null if okay or an error message if the mapEntries type is
* invalid in some way
* Note: when Java 1.5 support is added we can validate against the template types
*/
public static IMessage validateMapEntries(String targetName, String targetType, MapEntriesType mapEntries, IProject project)
{
if (mapEntries == null || targetType == null || project == null)
{
throw new AssertionError("Arguments to validateMapEntries can't be null"); //$NON-NLS-1$
}
try
{
// TODO: do a bean look-up for targetName to verify that it a) matches the type
// and b) exists on the bean
IType type = getType(project, targetType);
if (type != null &&
!(isInstanceOf(type, Signature.toString(TypeConstants.TYPE_MAP))))
{
return DiagnosticFactory
.create_MAP_ENTRIES_CAN_ONLY_BE_SET_ON_MAP_TYPE(targetName);
}
// TODO: validate the the map entries
// TODO: validate the types of the map entries against the values present
// TODO: validate the map key and value types against the template
}
catch (JavaModelException jme)
{
JSFCorePlugin.log(new Exception(jme), "Exception while validating mapEntries"); //$NON-NLS-1$
}
// if we get to here, we have not found anything meaningful to report
return null;
}
/**
* @param targetName
* @param targetType the type of the object that mapEntries will be assigned to
* @param listEntries
* @param project
* @return null if okay or an error message if the listEntries type is
* invalid in some way
* Note: when Java 1.5 support is added we can validate against the template types
*/
public static IMessage validateListEntries(String targetName, String targetType, ListEntriesType listEntries, IProject project)
{
if (listEntries == null || targetType == null || project == null)
{
throw new AssertionError("Arguments to validateMapEntries can't be null"); //$NON-NLS-1$
}
try
{
IType type = getType(project, targetType);
// TODO: do a bean look-up for targetName to verify that it a) matches the type
// and b) exists on the bean
if (type != null &&
!(isInstanceOf(type, Signature.toString(TypeConstants.TYPE_LIST))))
{
return DiagnosticFactory
.create_LIST_ENTRIES_CAN_ONLY_BE_SET_ON_LIST_TYPE(targetName);
}
// TODO: validate the the list entries
// TODO: validate the types of the list entries against the values present
// TODO: validate the value types against the template
}
catch (JavaModelException jme)
{
JSFCorePlugin.log(new Exception(jme), "Exception while validating mapEntries"); //$NON-NLS-1$
}
// if we get to here, we have not found anything meaningful to report
return null;
}
/**
* @param localeType
* @return a diagnostic if 'localeType' does not match the
* expected format or null if all is clear
*/
public static IMessage validateLocaleType(final String localeType)
{
// based on the localeType in the Faces 1.2 schema. This is safe
// to apply to 1.1 since it expects the same pattern even though
// the DTD cannot validate it
final String localeTypePattern = "[a-z]{2}(_|-)?([\\p{L}\\-\\p{Nd}]{2})?"; //$NON-NLS-1$
final Matcher matcher = Pattern.compile(localeTypePattern).matcher(localeType);
if (!matcher.matches())
{
return DiagnosticFactory.create_LOCALE_FORMAT_NOT_VALID();
}
return null;
}
/**
* @param type
* @param instanceOf
* @return true if type instanceof instanceOf is true
*
* @throws JavaModelException
*/
public static boolean isInstanceOf(final IType type, final String instanceOf) throws JavaModelException
{
if (instanceOf != null)
{
// must have either a no-arg constructor or an adapter constructor
// that is of the type of instanceOf
// IType constructorParam = getType(project, instanceOf);
// if (constructorParam != null)
// {
// final String constructorMethodName =
// type.getElementName();
// final IMethod defaultConstructor =
// type.getMethod(constructorMethodName, new String[0]);
// final IMethod adapterConstructor =
// type.getMethod(constructorMethodName, new String[]{instanceOf});
// final boolean isDefaultConstructor =
// defaultConstructor != null && defaultConstructor.isConstructor();
// final boolean isAdapterConstructor =
// adapterConstructor != null && adapterConstructor.isConstructor();
// if (!isDefaultConstructor && !isAdapterConstructor)
// {
// TODO: no constructor == default constructor...
// }
// }
// if the type is an exact match
if (instanceOf.equals(type.getFullyQualifiedName()))
{
return true;
}
final ITypeHierarchy typeHierarchy =
type.newSupertypeHierarchy(new NullProgressMonitor());
final IType[] supers = typeHierarchy.getAllSupertypes(type);
for (int i = 0; i < supers.length; i++)
{
if (instanceOf.equals(supers[i].getFullyQualifiedName()))
{
return true;
}
}
}
return false;
}
/**
* Takes the form expected by faces-config files for fully qualified class names
* @param inputStr java.lang.String format.
* @return the fully qualified type signature for the inputStr
*/
public static String getBaseType(final String inputStr)
{
String checkValue = inputStr.trim();
try
{
// arrays are a special case where the
// [Ljava.lang.String; syntax is valid.
if (Signature.getArrayCount(checkValue)>0)
{
checkValue = Signature.getElementType(checkValue);
checkValue = TypeUtil.getFullyQualifiedName(checkValue);
}
}
catch (final IllegalArgumentException e)
{
// ignore
}
return checkValue;
}
private AppConfigValidationUtil()
{
// no external construction
}
}