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.ELContext; 023 import javax.el.MethodExpression; 024 import javax.faces.component.StateHolder; 025 import javax.faces.context.FacesContext; 026 027 028 public class MethodExpressionTreeExpansionListener implements TreeExpansionListener, StateHolder { 029 030 private MethodExpression methodExpression; 031 032 private boolean isTransient = false; 033 034 public MethodExpressionTreeExpansionListener() { 035 } 036 037 public MethodExpressionTreeExpansionListener(MethodExpression methodExpression) { 038 this.methodExpression = methodExpression; 039 } 040 041 public void treeExpanded(TreeExpansionEvent event) { 042 FacesUtilsEL.invokeMethodExpression(FacesContext.getCurrentInstance(), methodExpression, event); 043 } 044 045 private ELContext elContext() { 046 return FacesContext.getCurrentInstance().getELContext(); 047 } 048 049 public void restoreState(FacesContext context, Object state) { 050 methodExpression = (MethodExpression) state; 051 } 052 053 public Object saveState(FacesContext context) { 054 return methodExpression; 055 } 056 057 public void setTransient(boolean newTransientValue) { 058 isTransient = newTransientValue; 059 } 060 061 public boolean isTransient() { 062 return isTransient; 063 } 064 }