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The private implementation classes of the Apache MyFaces Core JSF-2.0 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.context.servlet;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.faces.FactoryFinder;
import javax.faces.application.FacesMessage;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.context.PartialViewContext;
import javax.faces.context.PartialViewContextFactory;
import javax.faces.context.ResponseStream;
import javax.faces.context.ResponseWriter;
import javax.faces.event.PhaseId;
import javax.faces.render.RenderKit;
import javax.faces.render.RenderKitFactory;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.apache.myfaces.context.ReleaseableExternalContext;
import org.apache.myfaces.context.ReleaseableFacesContextFactory;
import org.apache.myfaces.shared.util.NullIterator;
/**
* @author Manfred Geiler (latest modification by $Author: lu4242 $)
* @author Anton Koinov
* @version $Revision: 1151677 $ $Date: 2011-07-27 19:03:59 -0500 (Wed, 27 Jul 2011) $
*/
public class FacesContextImpl extends FacesContextImplBase
{
private static final String METHOD_RESPONSEWRITER = "responseWriter";
static final String RE_SPLITTER = "[\\s\\t\\r\\n]*\\,[\\s\\t\\r\\n]*";
// ~ Instance fields ----------------------------------------------------------------------------
private Map> _messages = null;
private List _orderedMessages = null;
private PhaseId _currentPhaseId;
private ResponseStream _responseStream = null;
private ResponseWriter _responseWriter = null;
private FacesMessage.Severity _maximumSeverity = null;
private boolean _renderResponse = false;
private boolean _responseComplete = false;
private boolean _validationFailed = false;
private PartialViewContext _partialViewContext = null;
private ReleaseableFacesContextFactory _facesContextFactory = null;
// ~ Constructors -------------------------------------------------------------------------------
/**
* Creates a FacesContextImpl with a ServletExternalContextImpl.
*/
public FacesContextImpl(final ServletContext servletContext, final ServletRequest servletRequest,
final ServletResponse servletResponse)
{
this(new ServletExternalContextImpl(servletContext, servletRequest, servletResponse));
}
/**
* Private constructor used in internal construtor chain.
* @param externalContext
*/
private FacesContextImpl(ServletExternalContextImpl externalContext)
{
this(externalContext, externalContext, null);
}
/**
* Creates a FacesContextImpl with the given ExternalContext,
* ReleaseableExternalContext and ReleaseableFacesContextFactory.
* @param externalContext
* @param defaultExternalContext
* @param facesContextFactory
*/
public FacesContextImpl(final ExternalContext externalContext,
final ReleaseableExternalContext defaultExternalContext ,
final ReleaseableFacesContextFactory facesContextFactory)
{
// setCurrentInstance is called in constructor of super class
super(externalContext, defaultExternalContext);
_facesContextFactory = facesContextFactory;
}
// ~ Methods ------------------------------------------------------------------------------------
@Override
public final void release()
{
assertNotReleased();
_messages = null;
_orderedMessages = null;
_currentPhaseId = null;
_responseStream = null;
_responseWriter = null;
_maximumSeverity = null;
_partialViewContext = null;
if (_facesContextFactory != null)
{
_facesContextFactory.release();
_facesContextFactory = null;
}
// release FacesContextImplBase (sets current instance to null)
super.release();
}
@Override
public final FacesMessage.Severity getMaximumSeverity()
{
assertNotReleased();
return _maximumSeverity;
}
@Override
public final void addMessage(final String clientId, final FacesMessage message)
{
assertNotReleased();
if (message == null)
{
throw new NullPointerException("message");
}
if (_messages == null)
{
_messages = new HashMap>();
_orderedMessages = new ArrayList();
}
List lst = _messages.get(clientId);
if (lst == null)
{
lst = new ArrayList();
_messages.put(clientId, lst);
}
lst.add(message);
_orderedMessages.add (message);
FacesMessage.Severity serSeverity = message.getSeverity();
if (serSeverity != null)
{
if (_maximumSeverity == null)
{
_maximumSeverity = serSeverity;
}
else if (serSeverity.compareTo(_maximumSeverity) > 0)
{
_maximumSeverity = serSeverity;
}
}
}
@Override
public List getMessageList()
{
assertNotReleased();
if (_messages == null)
{
return Collections.unmodifiableList(Collections.emptyList());
}
return Collections.unmodifiableList(_orderedMessages);
}
@Override
public List getMessageList(String clientId)
{
assertNotReleased();
if (_messages == null || !_messages.containsKey(clientId))
{
return Collections.unmodifiableList(Collections.emptyList());
}
return _messages.get(clientId);
}
@Override
public final Iterator getMessages()
{
assertNotReleased();
if (_messages == null)
{
return NullIterator.instance();
}
return _orderedMessages.iterator();
}
@Override
public final Iterator getMessages(final String clientId)
{
assertNotReleased();
if (_messages == null || !_messages.containsKey(clientId))
{
return NullIterator.instance();
}
return _messages.get(clientId).iterator();
}
@Override
public final Iterator getClientIdsWithMessages()
{
assertNotReleased();
if (_messages == null || _messages.isEmpty())
{
return NullIterator.instance();
}
return _messages.keySet().iterator();
}
@Override
public PhaseId getCurrentPhaseId()
{
assertNotReleased();
return _currentPhaseId;
}
@Override
public void setCurrentPhaseId(PhaseId currentPhaseId)
{
assertNotReleased();
_currentPhaseId = currentPhaseId;
}
@Override
public PartialViewContext getPartialViewContext()
{
assertNotReleased();
if (_partialViewContext == null)
{
//Get through factory finder
PartialViewContextFactory factory = (PartialViewContextFactory)
FactoryFinder.getFactory(FactoryFinder.PARTIAL_VIEW_CONTEXT_FACTORY);
// Put actual facesContext as param, not this - this can be wrapped
_partialViewContext = factory.getPartialViewContext(FacesContext.getCurrentInstance());
}
return _partialViewContext;
}
@Override
public final boolean getRenderResponse()
{
assertNotReleased();
return _renderResponse;
}
@Override
public final void renderResponse()
{
assertNotReleased();
_renderResponse = true;
}
@Override
public final boolean getResponseComplete()
{
assertNotReleased();
return _responseComplete;
}
@Override
public final void responseComplete()
{
assertNotReleased();
_responseComplete = true;
}
@Override
public final void setResponseStream(final ResponseStream responseStream)
{
assertNotReleased();
if (responseStream == null)
{
throw new NullPointerException("responseStream");
}
_responseStream = responseStream;
}
@Override
public final ResponseStream getResponseStream()
{
assertNotReleased();
return _responseStream;
}
@Override
public final void setResponseWriter(final ResponseWriter responseWriter)
{
assertNotReleased();
if (responseWriter == null)
{
throw new NullPointerException(METHOD_RESPONSEWRITER);
}
_responseWriter = responseWriter;
}
@Override
public final ResponseWriter getResponseWriter()
{
assertNotReleased();
return _responseWriter;
}
@Override
public boolean isPostback()
{
assertNotReleased();
RenderKit renderKit = getRenderKit();
if (renderKit == null)
{
// NullPointerException with StateManager, because
// to restore state it first restore structure,
// then fill it and in the middle of the two previous
// process there is many calls from _ComponentChildrenList.childAdded
// to facesContext.isPostback, and getViewRoot is null.
//
// Setting a "phantom" UIViewRoot calling facesContext.setViewRoot(viewRoot)
// to avoid it is bad, because this is work of RestoreViewExecutor,
// and theorically ViewHandler.restoreView must return an UIViewRoot
// instance.
//
// The problem with this is if the user changes the renderkit directly
// using f:view renderKitId param, the ResponseStateManager returned
// will be the one tied to faces-config selected RenderKit. But the usual
// method to check if a request is a postback, is always detect the param
// javax.faces.ViewState, so there is no problem after all.
String renderKitId = this.getApplication().getViewHandler().calculateRenderKitId(this);
RenderKitFactory factory = (RenderKitFactory)
FactoryFinder.getFactory(FactoryFinder.RENDER_KIT_FACTORY);
renderKit = factory.getRenderKit(this, renderKitId);
}
return renderKit.getResponseStateManager().isPostback(this);
}
@Override
public void validationFailed()
{
assertNotReleased();
_validationFailed=true;
}
@Override
public boolean isValidationFailed()
{
assertNotReleased();
return _validationFailed;
}
}