1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20 package org.apache.myfaces.custom.scope; 21 22 import java.io.Serializable; 23 import java.util.Collections; 24 import java.util.Map; 25 import java.util.TreeMap; 26 27 import javax.faces.component.UIComponent; 28 import javax.faces.context.FacesContext; 29 import javax.faces.el.ValueBinding; 30 31 /** 32 * A central sessions holder, which stores 33 * the triggered scopes and also does 34 * the scope synching at the end 35 * 36 * @author Werner Punz werpu@gmx.at 37 * 38 */ 39 public class ScopeHolder implements Serializable 40 { 41 42 /** 43 * 44 */ 45 private static final long serialVersionUID = 2340601728913516991L; 46 /*dunno of a log(n) map is suitable here, after all we have only a handful of scopes*/ 47 Map scopeMap = Collections.synchronizedMap(new TreeMap()); 48 Map oldScopes = Collections.synchronizedMap(new TreeMap()); 49 50 /** 51 * fetches an old scope from the scope map 52 * 53 * @param key 54 * @return Object old scope 55 */ 56 public Object restoreScopeEntry(String key) 57 { 58 Object theentry = oldScopes.get(key); 59 return theentry; 60 } 61 62 /** 63 * note we use the global session internally not the portlet one, if you use 64 * portlets please-keep that in mind with your scope names 65 * 66 * @param parent 67 * the parent component 68 * @param context 69 * the current faces context 70 * @param scopeBindingValue 71 * the scope value binding 72 */ 73 public void saveScopeEntry(UIComponent parent, FacesContext context, 74 ValueBinding scopeBindingValue) 75 { 76 77 scopeMap.put(scopeBindingValue.getExpressionString(), scopeBindingValue 78 .getValue(context)); 79 } 80 81 /** 82 * the rendering is done we need to dump the unused scopes 83 * 84 */ 85 public void pageRefresh() 86 { 87 oldScopes = scopeMap; 88 scopeMap = Collections.synchronizedMap(new TreeMap()); 89 } 90 91 public void resetScopes() 92 { 93 oldScopes = Collections.synchronizedMap(new TreeMap()); 94 scopeMap = Collections.synchronizedMap(new TreeMap()); 95 } 96 97 public void resetScope(String key) 98 { 99 oldScopes.remove(key); 100 scopeMap.remove(key); 101 } 102 }