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The private implementation classes of the Apache MyFaces Core JSF-2.3-next Implementation
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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 org.apache.myfaces.view.facelets.compiler;
import java.io.IOException;
import java.io.Writer;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.component.UniqueIdVendor;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletException;
import org.apache.myfaces.view.facelets.FaceletCompositionContext;
import org.apache.myfaces.view.facelets.el.ELText;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
import org.apache.myfaces.util.lang.FastWriter;
/**
* @author Adam Winer
* @version $Id$
*/
final class UIInstructionHandler extends AbstractUIHandler
{
private final String alias;
private final String id;
private final ELText txt;
private final Instruction[] instructions;
private final int length;
private final boolean literal;
public UIInstructionHandler(String alias, String id, Instruction[] instructions, ELText txt)
{
this.alias = alias;
this.id = id;
this.instructions = instructions;
this.txt = txt;
this.length = txt.toString().length();
boolean literal = true;
int size = instructions.length;
for (int i = 0; i < size; i++)
{
Instruction ins = this.instructions[i];
if (!ins.isLiteral())
{
literal = false;
break;
}
}
this.literal = literal;
}
@Override
public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
ELException
{
if (parent != null)
{
String facetName = this.getFacetName(ctx, parent);
// our id
String id = ctx.generateUniqueId(this.id);
// grab our component
UIComponent c = null;
FaceletCompositionContext mctx= FaceletCompositionContext.getCurrentInstance(ctx);
if (mctx.isRefreshingSection())
{
if (facetName != null)
{
c = ComponentSupport.findChildInFacetByTagId(parent, id, facetName);
}
else
{
c = ComponentSupport.findChildInChildrenByTagId(parent, id);
}
}
boolean componentFound = false;
if (c != null)
{
componentFound = true;
mctx.incrementUniqueComponentId();
// mark all children for cleaning
mctx.markForDeletion(c);
}
else
{
Instruction[] applied;
String componentId = mctx.generateUniqueComponentId();
if (this.literal)
{
applied = this.instructions;
}
else
{
int size = this.instructions.length;
applied = new Instruction[size];
// Create a new list with all of the necessary applied
// instructions
Instruction ins;
for (int i = 0; i < size; i++)
{
ins = this.instructions[i];
applied[i] = ins.apply(ctx.getExpressionFactory(), ctx);
}
}
c = new UIInstructions(txt, applied);
// mark it owned by a facelet instance
//c.setId(ComponentSupport.getViewRoot(ctx, parent).createUniqueId());
UniqueIdVendor uniqueIdVendor
= mctx.getUniqueIdVendorFromStack();
if (uniqueIdVendor == null)
{
uniqueIdVendor = ComponentSupport.getViewRoot(ctx, parent);
}
if (uniqueIdVendor != null)
{
// UIViewRoot implements UniqueIdVendor, so there is no need to cast to UIViewRoot
// and call createUniqueId(). Also, note that UIViewRoot.createUniqueId() javadoc
// says we could send as seed the facelet generated id.
String uid = uniqueIdVendor.createUniqueId(ctx.getFacesContext(), componentId);
c.setId(uid);
}
//c.getAttributes().put(ComponentSupport.MARK_CREATED, id);
((UIInstructions)c).setMarkCreated(id);
}
boolean oldProcessingEvents = ctx.getFacesContext().isProcessingEvents();
// finish cleaning up orphaned children
if (componentFound)
{
mctx.finalizeForDeletion(c);
if (mctx.isRefreshingSection())
{
ctx.getFacesContext().setProcessingEvents(false);
}
if (facetName == null)
{
parent.getChildren().remove(c);
}
else
{
ComponentSupport.removeFacet(ctx, parent, c, facetName);
}
if (mctx.isRefreshingSection())
{
ctx.getFacesContext().setProcessingEvents(oldProcessingEvents);
}
}
if (componentFound && mctx.isRefreshingSection())
{
ctx.getFacesContext().setProcessingEvents(false);
}
if (facetName == null)
{
parent.getChildren().add(c);
}
else
{
ComponentSupport.addFacet(ctx, parent, c, facetName);
}
if (componentFound && mctx.isRefreshingSection())
{
ctx.getFacesContext().setProcessingEvents(oldProcessingEvents);
}
}
}
@Override
public String toString()
{
return this.txt.toString();
}
@Override
public String getText()
{
return this.txt.toString();
}
@Override
public String getText(FaceletContext ctx)
{
Writer writer = new FastWriter(this.length);
try
{
this.txt.apply(ctx.getExpressionFactory(), ctx).write(writer, ctx);
}
catch (IOException e)
{
throw new ELException(this.alias + ": " + e.getMessage(), e.getCause());
}
return writer.toString();
}
}