001    package org.apache.myfaces.tobago.event;
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    import org.apache.myfaces.tobago.compat.FacesUtilsEL;
021    
022    import javax.el.MethodExpression;
023    import javax.faces.component.StateHolder;
024    import javax.faces.context.FacesContext;
025    import javax.faces.event.AbortProcessingException;
026    
027    public class MethodExpressionStateChangeListener implements SheetStateChangeListener, StateHolder {
028    
029      private MethodExpression methodExpression;
030    
031      private boolean isTransient = false;
032    
033      public MethodExpressionStateChangeListener() {
034      }
035    
036      public MethodExpressionStateChangeListener(MethodExpression methodExpression) {
037        this.methodExpression = methodExpression;
038      }
039    
040      public void processSheetStateChange(SheetStateChangeEvent actionEvent) throws AbortProcessingException {
041        FacesUtilsEL.invokeMethodExpression(FacesContext.getCurrentInstance(), methodExpression, actionEvent);
042      }
043    
044      public void restoreState(FacesContext context, Object state) {
045        methodExpression = (MethodExpression) state;
046      }
047    
048      public Object saveState(FacesContext context) {
049        return methodExpression;
050      }
051    
052      public void setTransient(boolean newTransientValue) {
053        isTransient = newTransientValue;
054      }
055    
056      public boolean isTransient() {
057        return isTransient;
058      }
059    
060    }