/**
* Licensed under the Common Development and Distribution License,
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.sun.com/cddl/
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.sun.facelets.impl;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ELResolver;
import javax.el.ExpressionFactory;
import javax.el.FunctionMapper;
import javax.el.ValueExpression;
import javax.el.VariableMapper;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import com.sun.facelets.Facelet;
import com.sun.facelets.FaceletContext;
import com.sun.facelets.FaceletException;
import com.sun.facelets.FaceletHandler;
import com.sun.facelets.TemplateClient;
import com.sun.facelets.el.DefaultVariableMapper;
import com.sun.facelets.el.ELAdaptor;
/**
* Default FaceletContext implementation.
*
* A single FaceletContext is used for all Facelets involved in an invocation of
* {@link com.sun.facelets.Facelet#apply(FacesContext, UIComponent) Facelet#apply(FacesContext, UIComponent)}.
* This means that included Facelets are treated the same as the JSP include
* directive.
*
* @author Jacob Hookom
* @version $Id: DefaultFaceletContext.java,v 1.4.4.3 2006/03/25 01:01:53 jhook
* Exp $
*/
final class DefaultFaceletContext extends FaceletContext {
private final FacesContext faces;
private final ELContext ctx;
private final DefaultFacelet facelet;
private VariableMapper varMapper;
private FunctionMapper fnMapper;
private final Map ids;
public DefaultFaceletContext(DefaultFaceletContext ctx,
DefaultFacelet facelet) {
this.ctx = ctx.ctx;
this.facelet = facelet;
this.clients = ctx.clients;
this.faces = ctx.faces;
this.fnMapper = ctx.fnMapper;
this.ids = ctx.ids;
this.varMapper = ctx.varMapper;
}
public DefaultFaceletContext(FacesContext faces, DefaultFacelet facelet) {
this.ctx = ELAdaptor.getELContext(faces);
this.ids = new HashMap();
this.clients = new ArrayList(5);
this.faces = faces;
this.facelet = facelet;
this.varMapper = this.ctx.getVariableMapper();
if (this.varMapper == null) {
this.varMapper = new DefaultVariableMapper();
}
this.fnMapper = this.ctx.getFunctionMapper();
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#getFacesContext()
*/
public FacesContext getFacesContext() {
return this.faces;
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#getExpressionFactory()
*/
public ExpressionFactory getExpressionFactory() {
return this.facelet.getExpressionFactory();
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#setVariableMapper(javax.el.VariableMapper)
*/
public void setVariableMapper(VariableMapper varMapper) {
// Assert.param("varMapper", varMapper);
this.varMapper = varMapper;
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#setFunctionMapper(javax.el.FunctionMapper)
*/
public void setFunctionMapper(FunctionMapper fnMapper) {
// Assert.param("fnMapper", fnMapper);
this.fnMapper = fnMapper;
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#includeFacelet(javax.faces.component.UIComponent,
* java.lang.String)
*/
public void includeFacelet(UIComponent parent, String relativePath)
throws IOException, FaceletException, FacesException, ELException {
this.facelet.include(this, parent, relativePath);
}
/*
* (non-Javadoc)
*
* @see javax.el.ELContext#getFunctionMapper()
*/
public FunctionMapper getFunctionMapper() {
return this.fnMapper;
}
/*
* (non-Javadoc)
*
* @see javax.el.ELContext#getVariableMapper()
*/
public VariableMapper getVariableMapper() {
return this.varMapper;
}
/*
* (non-Javadoc)
*
* @see javax.el.ELContext#getContext(java.lang.Class)
*/
public Object getContext(Class key) {
return this.ctx.getContext(key);
}
/*
* (non-Javadoc)
*
* @see javax.el.ELContext#putContext(java.lang.Class, java.lang.Object)
*/
public void putContext(Class key, Object contextObject) {
this.ctx.putContext(key, contextObject);
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#generateUniqueId(java.lang.String)
*/
public String generateUniqueId(String base) {
Integer cnt = (Integer) this.ids.get(base);
if (cnt == null) {
this.ids.put(base, new Integer(0));
return base;
} else {
int i = cnt.intValue() + 1;
this.ids.put(base, new Integer(i));
return base + "_" + i;
}
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#getAttribute(java.lang.String)
*/
public Object getAttribute(String name) {
if (this.varMapper != null) {
ValueExpression ve = this.varMapper.resolveVariable(name);
if (ve != null) {
return ve.getValue(this);
}
}
return null;
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#setAttribute(java.lang.String,
* java.lang.Object)
*/
public void setAttribute(String name, Object value) {
if (this.varMapper != null) {
if (value == null) {
this.varMapper.setVariable(name, null);
} else {
this.varMapper.setVariable(name, this.facelet
.getExpressionFactory().createValueExpression(value,
Object.class));
}
}
}
/*
* (non-Javadoc)
*
* @see com.sun.facelets.FaceletContext#includeFacelet(javax.faces.component.UIComponent,
* java.net.URL)
*/
public void includeFacelet(UIComponent parent, URL absolutePath)
throws IOException, FaceletException, FacesException, ELException {
this.facelet.include(this, parent, absolutePath);
}
public ELResolver getELResolver() {
return this.ctx.getELResolver();
}
private final List clients;
public void popClient(TemplateClient client) {
if (!this.clients.isEmpty()) {
Iterator itr = this.clients.iterator();
while (itr.hasNext()) {
if (itr.next().equals(client)) {
itr.remove();
return;
}
}
}
throw new IllegalStateException(client + " not found");
}
public void pushClient(final TemplateClient client) {
this.clients.add(0, new TemplateManager(this.facelet, client));
}
public void extendClient(final TemplateClient client) {
this.clients.add(new TemplateManager(this.facelet, client));
}
public boolean includeDefinition(UIComponent parent, String name)
throws IOException, FaceletException, FacesException, ELException {
boolean found = false;
TemplateClient client;
for (int i = 0; i < this.clients.size() && found == false; i++) {
client = ((TemplateClient) this.clients.get(i));
if (client.equals(this.facelet))
continue;
found = client.apply(this, parent, name);
}
return found;
}
private final static class TemplateManager implements TemplateClient {
private final DefaultFacelet owner;
private final TemplateClient target;
private final Set names = new HashSet();
public TemplateManager(DefaultFacelet owner, TemplateClient target) {
this.owner = owner;
this.target = target;
}
public boolean apply(FaceletContext ctx, UIComponent parent, String name)
throws IOException, FacesException, FaceletException,
ELException {
String testName = (name != null) ? name : "facelets._NULL_DEF_";
if (this.names.contains(testName)) {
return false;
} else {
this.names.add(testName);
boolean found = false;
found = this.target.apply(new DefaultFaceletContext(
(DefaultFaceletContext) ctx, this.owner), parent, name);
this.names.remove(testName);
return found;
}
}
public boolean equals(Object o) {
// System.out.println(this.owner.getAlias() + " == " +
// ((DefaultFacelet) o).getAlias());
return this.owner == o || this.target == o;
}
}
}