001    package org.apache.myfaces.tobago.context;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one or more
005     * contributor license agreements.  See the NOTICE file distributed with
006     * this work for additional information regarding copyright ownership.
007     * The ASF licenses this file to You under the Apache License, Version 2.0
008     * (the "License"); you may not use this file except in compliance with
009     * the License.  You may obtain a copy of the License at
010     *
011     *      http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing, software
014     * distributed under the License is distributed on an "AS IS" BASIS,
015     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016     * See the License for the specific language governing permissions and
017     * limitations under the License.
018     */
019    
020    
021    import javax.faces.component.StateHolder;
022    import javax.faces.context.FacesContext;
023    import java.io.Serializable;
024    
025    /*
026     * Date: May 3, 2007
027     * Time: 5:44:04 PM
028     */
029    public class TransientStateHolder implements StateHolder, Serializable {
030    
031      private static final long serialVersionUID = -5260593843885016768L;
032    
033      private transient Object object;
034    
035      public TransientStateHolder() {
036      }
037    
038      public TransientStateHolder(Object object) {
039        this.object = object;
040      }
041    
042      public Object saveState(FacesContext context) {
043         // do nothing
044        return null;
045      }
046    
047      public void put(Object object) {
048        this.object = object;
049      }
050    
051      public boolean isEmpty() {
052        return object == null;
053      }
054    
055      public Object get() {
056        return object;
057      }
058    
059      public void restoreState(FacesContext context, Object state) {
060        // do nothing
061      }
062    
063      public boolean isTransient() {
064        return true;
065      }
066    
067      public void setTransient(boolean newTransientValue) {
068         // do nothing
069      }
070    
071    }