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package com.sun.faces.config.processor;
import com.sun.faces.application.ApplicationAssociate;
import javax.faces.application.NavigationCase;
import javax.faces.application.NavigationHandler;
import javax.faces.application.ConfigurableNavigationHandler;
import com.sun.faces.util.FacesLogger;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.servlet.ServletContext;
import javax.xml.xpath.XPathExpressionException;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.text.MessageFormat;
import com.sun.faces.el.ELUtils;
import com.sun.faces.config.DocumentInfo;
/**
* <p>
* This <code>ConfigProcessor</code> handles all elements defined under
* <code>/faces-config/managed-bean</code>.
* </p>
*/
public class NavigationConfigProcessor extends AbstractConfigProcessor {
private static final Logger LOGGER = FacesLogger.CONFIG.getLogger();
/**
* <p>/faces-config/navigation-rule</p>
*/
private static final String NAVIGATION_RULE = "navigation-rule";
/**
* <p>/faces-config/navigation-rule/from-view-id</p>
*/
private static final String FROM_VIEW_ID = "from-view-id";
/**
* <p>/faces-config/navigation-rule/navigation-case</p>
*/
private static final String NAVIGATION_CASE = "navigation-case";
/**
* <p>/faces-config/navigation-rule/navigation-case/from-action</p>
*/
private static final String FROM_ACTION = "from-action";
/**
* <p>/faces-config/navigation-rule/navigation-case/from-outcome</p>
*/
private static final String FROM_OUTCOME = "from-outcome";
/**
* <p>/faces-config/navigation-rule/navigation-case/if</p>
*/
private static final String IF = "if";
/**
* <p>/faces-config/navigation-rule/navigation-case/to-view-id</p>
*/
private static final String TO_VIEW_ID = "to-view-id";
/**
* <p>/faces-config/navigation-rule/navigation-case/redirect</p>
*/
private static final String REDIRECT = "redirect";
/**
* <p>/faces-confg/navigation-rule/navigation-case/redirect/view-param</p>
*/
private static final String VIEW_PARAM = "view-param";
/**
* <p>/faces-confg/navigation-rule/navigation-case/redirect/view-param/name</p>
*/
private static final String VIEW_PARAM_NAME = "name";
/**
* <p>/faces-confg/navigation-rule/navigation-case/redirect/view-param/value</p>
*/
private static final String VIEW_PARAM_VALUE = "value";
/**
* <p>/faces-config/navigation-rule/navigation-case/redirect[@include-page-params]</p>
*/
private static final String INCLUDE_VIEW_PARAMS_ATTRIBUTE = "include-view-params";
/**
* <p>If <code>from-view-id</code> is not defined.<p>
*/
private static final String FROM_VIEW_ID_DEFAULT = "*";
// -------------------------------------------- Methods from ConfigProcessor
/**
* @see ConfigProcessor#process(javax.servlet.ServletContext,com.sun.faces.config.DocumentInfo[])
*/
public void process(ServletContext sc, DocumentInfo[] documentInfos)
throws Exception {
NavigationHandler handler = getApplication().getNavigationHandler();
for (DocumentInfo documentInfo : documentInfos) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
MessageFormat.format(
"Processing navigation-rule elements for document: ''{0}''",
documentInfo.getSourceURI()));
}
Document document = documentInfo.getDocument();
String namespace = document.getDocumentElement()
.getNamespaceURI();
NodeList navigationRules = document.getDocumentElement()
.getElementsByTagNameNS(namespace, NAVIGATION_RULE);
if (navigationRules != null && navigationRules.getLength() > 0) {
addNavigationRules(navigationRules, handler, sc);
}
}
invokeNext(sc, documentInfos);
}
// --------------------------------------------------------- Private Methods
private void addNavigationRules(NodeList navigationRules,
NavigationHandler navHandler,
ServletContext sc)
throws XPathExpressionException {
for (int i = 0, size = navigationRules.getLength(); i < size; i++) {
Node navigationRule = navigationRules.item(i);
if (navigationRule.getNodeType() == Node.ELEMENT_NODE) {
NodeList children = navigationRule.getChildNodes();
String fromViewId = FROM_VIEW_ID_DEFAULT;
List<Node> navigationCases = null;
for (int c = 0, csize = children.getLength();
c < csize;
c++) {
Node n = children.item(c);
if (n.getNodeType() == Node.ELEMENT_NODE) {
if (FROM_VIEW_ID.equals(n.getLocalName())) {
String t = getNodeText(n);
fromViewId = ((t == null)
? FROM_VIEW_ID_DEFAULT
: t);
if (!fromViewId.equals(FROM_VIEW_ID_DEFAULT) && fromViewId.charAt(0) != '/') {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.config.navigation.from_view_id_leading_slash",
new String[] { fromViewId });
}
fromViewId = '/' + fromViewId;
}
} else if (NAVIGATION_CASE.equals(n.getLocalName())) {
if (navigationCases == null) {
navigationCases = new ArrayList<Node>(csize);
}
navigationCases.add(n);
}
}
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
MessageFormat.format(
"Processing navigation rule with 'from-view-id' of ''{0}''",
fromViewId));
}
addNavigationCasesForRule(fromViewId,
navigationCases,
navHandler,
sc);
}
}
}
private void addNavigationCasesForRule(String fromViewId,
List<Node> navigationCases,
NavigationHandler navHandler,
ServletContext sc) {
if (navigationCases != null && !navigationCases.isEmpty()) {
ApplicationAssociate associate =
ApplicationAssociate.getInstance(sc);
for (Node navigationCase : navigationCases) {
if (navigationCase.getNodeType() != Node.ELEMENT_NODE) {
continue;
}
NodeList children = navigationCase.getChildNodes();
String outcome = null;
String action = null;
String condition = null;
String toViewId = null;
Map<String,List<String>> parameters = null;
boolean redirect = false;
boolean includeViewParams = false;
for (int i = 0, size = children.getLength(); i < size; i++) {
Node n = children.item(i);
if (n.getNodeType() == Node.ELEMENT_NODE) {
if (FROM_OUTCOME.equals(n.getLocalName())) {
outcome = getNodeText(n);
} else if (FROM_ACTION.equals(n.getLocalName())) {
action = getNodeText(n);
} else if (IF.equals(n.getLocalName())) {
String expression = getNodeText(n);
if (ELUtils.isExpression(expression) && !ELUtils.isMixedExpression(expression)) {
condition = expression;
}
else {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.config.navigation.if_invalid_expression",
new String[] { expression, fromViewId });
}
}
} else if (TO_VIEW_ID.equals(n.getLocalName())) {
String toViewIdString = getNodeText(n);
if (toViewIdString.charAt(0) != '/' && toViewIdString.charAt(0) != '#') {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.config.navigation.to_view_id_leading_slash",
new String[] { toViewIdString,
fromViewId });
}
toViewId = '/' + toViewIdString;
} else {
toViewId = toViewIdString;
}
} else if (REDIRECT.equals(n.getLocalName())) {
parameters = processParameters(n.getChildNodes());
includeViewParams = isIncludeViewParams(n);
redirect = true;
}
}
}
NavigationCase cnc =
new NavigationCase(fromViewId,
action,
outcome,
condition,
toViewId,
parameters,
redirect,
includeViewParams);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
MessageFormat.format("Adding NavigationCase: {0}",
cnc.toString()));
}
// if the top-level NavigationHandler is an instance of
// ConfigurableNavigationHandler, add the NavigationCases to
// that instance as well as adding them to the application associate.
// We have to add them to the ApplicationAssociate in the case
// where the top-level NavigationHandler may be custom and delegates
// to the default NavigationHandler implementation. In 1.2, they
// could be guaranteed that the default implementation had all
// defined navigation mappings.
if (navHandler instanceof ConfigurableNavigationHandler) {
ConfigurableNavigationHandler cnav = (ConfigurableNavigationHandler) navHandler;
Set<NavigationCase> cases = cnav.getNavigationCases().get(fromViewId);
if (cases == null) {
cases = new LinkedHashSet<NavigationCase>();
cnav.getNavigationCases().put(fromViewId, cases);
}
cases.add(cnc);
}
associate.addNavigationCase(cnc);
}
}
}
private Map<String,List<String>> processParameters(NodeList children) {
Map<String,List<String>> parameters = null;
if (children.getLength() > 0) {
parameters = new LinkedHashMap<String,List<String>>(4, 1.0f);
for (int i = 0, size = children.getLength(); i < size; i++) {
Node n = children.item(i);
if (n.getNodeType() == Node.ELEMENT_NODE) {
if (VIEW_PARAM.equals(n.getLocalName())) {
String name = null;
String value = null;
NodeList params = n.getChildNodes();
for (int j = 0, jsize = params.getLength(); j < jsize; j++) {
Node pn = params.item(j);
if (pn.getNodeType() == Node.ELEMENT_NODE) {
if (VIEW_PARAM_NAME.equals(pn.getLocalName())) {
name = getNodeText(pn);
}
if (VIEW_PARAM_VALUE.equals(pn.getLocalName())) {
value = getNodeText(pn);
}
}
}
if (name != null) {
List<String> values = parameters.get(name);
if (values == null && value != null) {
values = new ArrayList<String>(2);
parameters.put(name, values);
}
if (values != null) {
values.add(value);
}
}
}
}
}
}
return parameters;
}
private boolean isIncludeViewParams(Node n) {
return Boolean.valueOf(getNodeText(n.getAttributes().getNamedItem(INCLUDE_VIEW_PARAMS_ATTRIBUTE)));
}
}