/*
* 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.tag;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.FaceletHandler;
import javax.faces.view.facelets.Tag;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;
/**
*
* @author lu4242
*/
public class ComponentTagDeclarationLibrary implements TagLibrary
{
private final Map<String, Map<String, TagHandlerFactory>> _factories;
public ComponentTagDeclarationLibrary()
{
_factories = new HashMap<String, Map<String, TagHandlerFactory>>();
}
/*
* (non-Javadoc)
*
* @see org.apache.myfaces.view.facelets.tag.TagLibrary#containsNamespace(java.lang.String)
*/
public boolean containsNamespace(String ns)
{
return _factories.containsKey(ns);
}
/*
* (non-Javadoc)
*
* @see org.apache.myfaces.view.facelets.tag.TagLibrary#containsTagHandler(java.lang.String, java.lang.String)
*/
public boolean containsTagHandler(String ns, String localName)
{
if (containsNamespace(ns))
{
Map<String, TagHandlerFactory> map = _factories.get(ns);
if (map == null)
{
return false;
}
return map.containsKey(localName);
}
else
{
return false;
}
}
/*
* (non-Javadoc)
*
* @see org.apache.myfaces.view.facelets.tag.TagLibrary#createTagHandler(java.lang.String, java.lang.String,
* org.apache.myfaces.view.facelets.tag.TagConfig)
*/
public TagHandler createTagHandler(String ns, String localName, TagConfig tag) throws FacesException
{
if (containsNamespace(ns))
{
Map<String, TagHandlerFactory> map = _factories.get(ns);
if (map == null)
{
map = new HashMap<String, TagHandlerFactory>();
_factories.put(ns, map);
}
TagHandlerFactory f = map.get(localName);
if (f != null)
{
return f.createHandler(tag);
}
}
return null;
}
/*
* (non-Javadoc)
*
* @see org.apache.myfaces.view.facelets.tag.TagLibrary#containsFunction(java.lang.String, java.lang.String)
*/
public boolean containsFunction(String ns, String name)
{
return false;
}
/*
* (non-Javadoc)
*
* @see org.apache.myfaces.view.facelets.tag.TagLibrary#createFunction(java.lang.String, java.lang.String)
*/
public Method createFunction(String ns, String name)
{
return null;
}
/*
public String getNamespace()
{
return _namespace;
}*/
/**
* Add a ComponentHandler with the specified componentType and rendererType, aliased by the tag name.
*
* @see ComponentHandler
* @see javax.faces.application.Application#createComponent(java.lang.String)
* @param name
* name to use, "foo" would be <my:foo />
* @param componentType
* componentType to use
* @param rendererType
* rendererType to use
*/
public final void addComponent(String namespace, String name, String componentType, String rendererType)
{
Map<String, TagHandlerFactory> map = _factories.get(namespace);
if (map == null)
{
map = new HashMap<String, TagHandlerFactory>();
_factories.put(namespace, map);
}
map.put(name, new ComponentHandlerFactory(componentType, rendererType));
}
/**
* Add a ComponentHandler with the specified componentType and rendererType, aliased by the tag name. The Facelet
* will be compiled with the specified HandlerType (which must extend AbstractComponentHandler).
*
* @see AbstractComponentHandler
* @param name
* name to use, "foo" would be <my:foo />
* @param componentType
* componentType to use
* @param rendererType
* rendererType to use
* @param handlerType
* a Class that extends AbstractComponentHandler
*/
public final void addComponent(String namespace, String name, String componentType, String rendererType,
Class<? extends TagHandler> handlerType)
{
Map<String, TagHandlerFactory> map = _factories.get(namespace);
if (map == null)
{
map = new HashMap<String, TagHandlerFactory>();
_factories.put(namespace, map);
}
map.put(name, new UserComponentHandlerFactory(componentType, rendererType, handlerType));
}
private static class ComponentConfigWrapper implements ComponentConfig
{
protected final TagConfig parent;
protected final String componentType;
protected final String rendererType;
public ComponentConfigWrapper(TagConfig parent, String componentType, String rendererType)
{
this.parent = parent;
this.componentType = componentType;
this.rendererType = rendererType;
}
public String getComponentType()
{
return this.componentType;
}
public String getRendererType()
{
return this.rendererType;
}
public FaceletHandler getNextHandler()
{
return this.parent.getNextHandler();
}
public Tag getTag()
{
return this.parent.getTag();
}
public String getTagId()
{
return this.parent.getTagId();
}
}
private static class ComponentHandlerFactory implements TagHandlerFactory
{
protected final String componentType;
protected final String renderType;
/**
* @param handlerType
*/
public ComponentHandlerFactory(String componentType, String renderType)
{
this.componentType = componentType;
this.renderType = renderType;
}
public TagHandler createHandler(TagConfig cfg) throws FacesException, ELException
{
ComponentConfig ccfg = new ComponentConfigWrapper(cfg, this.componentType, this.renderType);
return new javax.faces.view.facelets.ComponentHandler(ccfg);
}
}
private static class UserComponentHandlerFactory implements TagHandlerFactory
{
private final static Class<?>[] CONS_SIG = new Class[] { ComponentConfig.class };
protected final String componentType;
protected final String renderType;
protected final Class<? extends TagHandler> type;
protected final Constructor<? extends TagHandler> constructor;
/**
* @param handlerType
*/
public UserComponentHandlerFactory(String componentType, String renderType, Class<? extends TagHandler> type)
{
this.componentType = componentType;
this.renderType = renderType;
this.type = type;
try
{
this.constructor = this.type.getConstructor(CONS_SIG);
}
catch (Exception e)
{
throw new FaceletException("Must have a Constructor that takes in a ComponentConfig", e);
}
}
public TagHandler createHandler(TagConfig cfg) throws FacesException, ELException
{
try
{
ComponentConfig ccfg = new ComponentConfigWrapper(cfg, componentType, renderType);
return constructor.newInstance(new Object[] { ccfg });
}
catch (InvocationTargetException e)
{
throw new FaceletException(e.getCause().getMessage(), e.getCause().getCause());
}
catch (Exception e)
{
throw new FaceletException("Error Instantiating ComponentHandler: " + this.type.getName(), e);
}
}
}
}