/*
* $Id: ResponseStateManagerImpl.java,v 1.53 2008/04/02 17:14:40 rlubke Exp $
*/
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/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 glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [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.renderkit;
import java.io.IOException;
import javax.faces.FacesException;
import javax.faces.application.StateManager;
import javax.faces.context.FacesContext;
import javax.faces.render.ResponseStateManager;
import com.sun.faces.config.WebConfiguration;
import static com.sun.faces.config.WebConfiguration.WebContextInitParameter.StateSavingMethod;
import com.sun.faces.util.RequestStateManager;
/**
* <p>A <code>ResonseStateManager</code> implementation
* for the default HTML render kit.
*/
public class ResponseStateManagerImpl extends ResponseStateManager {
private StateHelper helper;
public ResponseStateManagerImpl() {
WebConfiguration webConfig = WebConfiguration.getInstance();
String stateMode =
webConfig.getOptionValue(StateSavingMethod);
helper = ((StateManager.STATE_SAVING_METHOD_CLIENT.equals(stateMode)
? new ClientSideStateHelper()
: new ServerSideStateHelper()));
}
// --------------------------------------- Methods from ResponseStateManager
/**
* @see {@link ResponseStateManager#isPostback(javax.faces.context.FacesContext)}
*/
@Override
public boolean isPostback(FacesContext context) {
return context.getExternalContext().getRequestParameterMap().
containsKey(ResponseStateManager.VIEW_STATE_PARAM);
}
/**
* @see {@link javax.faces.render.ResponseStateManager#getState(javax.faces.context.FacesContext, String)}
*/
@Override
public Object getState(FacesContext context, String viewId) {
Object state =
RequestStateManager.get(context, RequestStateManager.FACES_VIEW_STATE);
if (state == null) {
try {
state = helper.getState(context, viewId);
if (state != null) {
RequestStateManager.set(context,
RequestStateManager.FACES_VIEW_STATE,
state);
}
} catch (IOException e) {
throw new FacesException(e);
}
}
return state;
}
/**
* @see {@link javax.faces.render.ResponseStateManager#writeState(javax.faces.context.FacesContext, Object)}
*/
@Override
public void writeState(FacesContext context, Object state)
throws IOException {
helper.writeState(context, state, null);
}
/**
* @see {@link javax.faces.render.ResponseStateManager#getViewState(javax.faces.context.FacesContext, Object)}
*/
@Override
public String getViewState(FacesContext context, Object state) {
StringBuilder sb = new StringBuilder(32);
try {
helper.writeState(context, state, sb);
} catch (IOException e) {
throw new FacesException(e);
}
return sb.toString();
}
@SuppressWarnings({"deprecation"})
@Override
public Object getTreeStructureToRestore(FacesContext context, String viewId) {
Object[] state = (Object[]) getState(context, viewId);
if (state != null) {
return state[0];
}
return null;
}
}