/*
* 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 java.util.ArrayList;
import java.util.List;
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.composite.InsertChildrenHandler;
import org.apache.myfaces.view.facelets.tag.composite.InsertFacetHandler;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
import org.apache.myfaces.view.facelets.util.FastWriter;
/**
* @author Adam Winer
* @version $Id: UIInstructionHandler.java,v 1.6 2008/07/13 19:01:33 rlubke Exp $
*/
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;
}
public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
ELException
{
if (parent != null)
{
// our id
String id = ctx.generateUniqueId(this.id);
// grab our component
UIComponent c = null;
FaceletCompositionContext mctx= FaceletCompositionContext.getCurrentInstance(ctx);
boolean componentFoundInserted = false;
if (mctx.isRefreshingTransientBuild())
{
c = ComponentSupport.findChildByTagId(parent, id);
/*
if (c == null && mctx.isRefreshTransientBuildOnPSS() &&
mctx.isRefreshingTransientBuild() && UIComponent.isCompositeComponent(parent))
{
String facetName = this.getFacetName(ctx, parent);
if (facetName == null)
{
String targetClientId = (String) parent.getAttributes().get(InsertChildrenHandler.INSERT_CHILDREN_TARGET_ID);
if (targetClientId != null)
{
UIComponent targetComponent = parent.findComponent(targetClientId.substring(parent.getClientId().length()+1));
if (targetComponent != null)
{
c = ComponentSupport.findChildByTagId(targetComponent, id);
}
}
if (c != null)
{
c.getAttributes().put(InsertChildrenHandler.USES_INSERT_CHILDREN, Boolean.TRUE);
componentFoundInserted = true;
}
}
else
{
String targetClientId = (String) parent.getAttributes().get(InsertFacetHandler.INSERT_FACET_TARGET_ID+facetName);
if (targetClientId != null)
{
UIComponent targetComponent = parent.findComponent(targetClientId.substring(parent.getClientId().length()+1));
if (targetComponent != null)
{
c = ComponentSupport.findChildByTagId(targetComponent, id);
if (c != null)
{
c.getAttributes().put(InsertFacetHandler.USES_INSERT_FACET, Boolean.TRUE);
componentFoundInserted = true;
}
}
}
}
}
*/
}
boolean componentFound = false;
if (c != null)
{
componentFound = true;
// mark all children for cleaning
ComponentSupport.markForDeletion(c);
}
else
{
Instruction[] applied;
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 = FaceletCompositionContext.getCurrentInstance(ctx).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(), id);
c.setId(uid);
}
c.getAttributes().put(ComponentSupport.MARK_CREATED, id);
}
boolean oldProcessingEvents = ctx.getFacesContext().isProcessingEvents();
// finish cleaning up orphaned children
if (componentFound)
{
ComponentSupport.finalizeForDeletion(c);
if (!componentFoundInserted)
{
if (mctx.isRefreshingTransientBuild())
{
ctx.getFacesContext().setProcessingEvents(false);
}
parent.getChildren().remove(c);
if (mctx.isRefreshingTransientBuild())
{
ctx.getFacesContext().setProcessingEvents(oldProcessingEvents);
}
}
}
/*
if ( mctx.isRefreshingTransientBuild()
&& UIComponent.isCompositeComponent(parent))
{
// Save the child structure behind this component, so it can be
// used later by InsertChildrenHandler and InsertFacetHandler
// to update components correctly.
String facetName = this.getFacetName(ctx, parent);
if (facetName != null)
{
if (parent.getAttributes().containsKey(InsertFacetHandler.INSERT_FACET_TARGET_ID+facetName))
{
List<String> ordering = (List<String>) parent.getAttributes().get(
InsertFacetHandler.INSERT_FACET_ORDERING+facetName);
if (ordering == null)
{
ordering = new ArrayList<String>();
parent.getAttributes().put(InsertFacetHandler.INSERT_FACET_ORDERING+facetName, ordering);
}
ordering.remove(id);
ordering.add(id);
}
}
else
{
if (parent.getAttributes().containsKey(InsertChildrenHandler.INSERT_CHILDREN_TARGET_ID))
{
List<String> ordering = (List<String>) parent.getAttributes().get(
InsertChildrenHandler.INSERT_CHILDREN_ORDERING);
if (ordering == null)
{
ordering = new ArrayList<String>();
parent.getAttributes().put(InsertChildrenHandler.INSERT_CHILDREN_ORDERING, ordering);
}
ordering.remove(id);
ordering.add(id);
}
}
}
*/
if (!componentFoundInserted)
{
if (componentFound && mctx.isRefreshingTransientBuild())
{
ctx.getFacesContext().setProcessingEvents(false);
}
this.addComponent(ctx, parent, c);
if (componentFound && mctx.isRefreshingTransientBuild())
{
ctx.getFacesContext().setProcessingEvents(oldProcessingEvents);
}
}
}
}
public String toString()
{
return this.txt.toString();
}
public String getText()
{
return this.txt.toString();
}
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();
}
}