/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.facelets.tag.composite;
import com.sun.faces.facelets.tag.TagHandlerImpl;
import com.sun.faces.facelets.tag.jsf.ComponentSupport;
import com.sun.faces.util.FacesLogger;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagException;
import javax.faces.view.Location;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.PostAddToViewEvent;
import javax.faces.application.Resource;
import java.io.IOException;
import java.util.List;
import java.util.logging.Logger;
import java.util.logging.Level;
/**
* This <code>TagHandler</code> is responsible for relocating children
* defined within a composite component to a component within the
* composite component's <code>composite:implementation</code> section.
*/
public class InsertChildrenHandler extends TagHandlerImpl {
private final Logger LOGGER = FacesLogger.TAGLIB.getLogger();
private static final String REQUIRED_ATTRIBUTE = "required";
// This attribute is not required. If not defined, then assume the facet
// isn't necessary.
private TagAttribute required;
// ------------------------------------------------------------ Constructors
public InsertChildrenHandler(TagConfig config) {
super(config);
required = getAttribute(REQUIRED_ATTRIBUTE);
}
// ------------------------------------------------- Methods from TagHandler
@Override
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
UIComponent compositeParent =
UIComponent.getCurrentCompositeComponent(ctx.getFacesContext());
if (compositeParent != null) {
int count = parent.getChildCount();
compositeParent.subscribeToEvent(PostAddToViewEvent.class,
new RelocateChildrenListener(ctx,
parent,
count,
this.tag.getLocation()));
}
}
// ----------------------------------------------------------- Inner Classes
private class RelocateChildrenListener extends RelocateListener {
private FaceletContext ctx;
private UIComponent component;
private int idx;
private Location location;
// -------------------------------------------------------- Constructors
RelocateChildrenListener(FaceletContext ctx,
UIComponent component,
int idx,
Location location) {
this.ctx = ctx;
this.component = component;
if (!component.getAttributes().containsKey("idx")) {
component.getAttributes().put("idx", idx);
}
this.idx = idx;
this.location = location;
}
// --------------------------- Methods from ComponentSystemEventListener
@Override
public void processEvent(ComponentSystemEvent event)
throws AbortProcessingException {
UIComponent compositeParent = event.getComponent();
if (compositeParent == null) {
return;
}
// ensure we're working with the expected composite component as
// nesting levels may mask this.
Resource resource = getBackingResource(compositeParent);
while (compositeParent != null && !resourcesMatch(resource, location)) {
compositeParent = UIComponent.getCompositeComponentParent(compositeParent);
if (compositeParent != null) {
resource = getBackingResource(compositeParent);
}
}
if (compositeParent == null) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"jsf.composite.component.insertchildren.missing.template",
location.toString());
}
return;
}
if (compositeParent.getChildCount() == 0 && isRequired()) {
throwRequiredException(ctx, compositeParent);
}
List<UIComponent> compositeChildren = compositeParent.getChildren();
List<UIComponent> parentChildren = component.getChildren();
//store the new parent's info per child in the old parent's attr map
//<child id, new parent>
for (UIComponent c : compositeChildren) {
String key = (String)c.getAttributes().get(ComponentSupport.MARK_CREATED);
String value = component.getId();
if (key != null && value != null) {
compositeParent.getAttributes().put(key, value);
}
}
if (parentChildren.size() < getIdx()) {
parentChildren.addAll(compositeChildren);
} else {
parentChildren.addAll(getIdx(), compositeChildren);
}
}
// ----------------------------------------------------- Private Methods
private int getIdx() {
Integer idx = (Integer) component.getAttributes().get("idx");
return ((idx != null) ? idx : this.idx);
}
private void throwRequiredException(FaceletContext ctx,
UIComponent compositeParent) {
throw new TagException(tag,
"Unable to find any children components "
+ "nested within parent composite component with id '"
+ compositeParent .getClientId(ctx.getFacesContext())
+ '\'');
}
private boolean isRequired() {
return ((required != null) && required.getBoolean(ctx));
}
} // END RelocateChildrenListener
}