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1: /* ActionMap.java -- 2: Copyright (C) 2002, 2004 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package javax.swing; 39: 40: import java.io.IOException; 41: import java.io.ObjectInputStream; 42: import java.io.ObjectOutputStream; 43: import java.io.Serializable; 44: import java.util.Arrays; 45: import java.util.HashMap; 46: import java.util.HashSet; 47: import java.util.Map; 48: import java.util.Set; 49: 50: 51: /** 52: * @author Andrew Selkirk 53: * @author Michael Koch 54: */ 55: public class ActionMap 56: implements Serializable 57: { 58: private static final long serialVersionUID = -6277518704513986346L; 59: 60: /** 61: * actionMap 62: */ 63: private Map actionMap = new HashMap(); 64: 65: /** 66: * parent 67: */ 68: private ActionMap parent; 69: 70: /** 71: * Creates a new <code>ActionMap</code> instance. 72: */ 73: public ActionMap() 74: { 75: } 76: 77: /** 78: * Returns an action associated with an object. 79: * 80: * @param key the key of the enty 81: * 82: * @return the action associated with key, may be null 83: */ 84: public Action get(Object key) 85: { 86: Object result = actionMap.get(key); 87: 88: if (result == null && parent != null) 89: result = parent.get(key); 90: 91: return (Action) result; 92: } 93: 94: /** 95: * Puts a new <code>Action</code> into the <code>ActionMap</code>. 96: * If action is null an existing entry will be removed. 97: * 98: * @param key the key for the entry 99: * @param action the action. 100: */ 101: public void put(Object key, Action action) 102: { 103: if (action == null) 104: actionMap.remove(key); 105: else 106: actionMap.put(key, action); 107: } 108: 109: /** 110: * Remove an entry from the <code>ActionMap</code>. 111: * 112: * @param key the key of the entry to remove 113: */ 114: public void remove(Object key) 115: { 116: actionMap.remove(key); 117: } 118: 119: /** 120: * Returns the parent of this <code>ActionMap</code>. 121: * 122: * @return the parent, may be null. 123: */ 124: public ActionMap getParent() 125: { 126: return parent; 127: } 128: 129: /** 130: * Sets a parent for this <code>ActionMap</code>. 131: * 132: * @param parentMap the new parent 133: */ 134: public void setParent(ActionMap parentMap) 135: { 136: if (parentMap != this) 137: parent = parentMap; 138: } 139: 140: /** 141: * Returns the number of entries in this <code>ActionMap</code>. 142: * 143: * @return the number of entries 144: */ 145: public int size() 146: { 147: return actionMap.size(); 148: } 149: 150: /** 151: * Clears the <code>ActionMap</code>. 152: */ 153: public void clear() 154: { 155: actionMap.clear(); 156: } 157: 158: /** 159: * Returns all keys of entries in this <code>ActionMap</code>. 160: * 161: * @return an array of keys 162: */ 163: public Object[] keys() 164: { 165: return actionMap.keySet().toArray(); 166: } 167: 168: /** 169: * Returns all keys of entries in this <code>ActionMap</code> 170: * and all its parents. 171: * 172: * @return an array of keys 173: */ 174: public Object[] allKeys() 175: { 176: Set set = new HashSet(); 177: 178: if (parent != null) 179: set.addAll(Arrays.asList(parent.allKeys())); 180: 181: set.addAll(actionMap.keySet()); 182: return set.toArray(); 183: } 184: 185: /** 186: * writeObject 187: * 188: * @param stream the stream to write to 189: * 190: * @exception IOException If an error occurs 191: */ 192: private void writeObject(ObjectOutputStream stream) 193: throws IOException 194: { 195: // TODO 196: } 197: 198: /** 199: * readObject 200: * 201: * @param stream the stream to read from 202: * 203: * @exception ClassNotFoundException If the serialized class cannot be found 204: * @exception IOException If an error occurs 205: */ 206: private void readObject(ObjectInputStream stream) 207: throws ClassNotFoundException, IOException 208: { 209: // TODO 210: } 211: }
GNU Classpath (0.17) |