projects/dwt2: org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/set/MappedSet.d annotate

author	Frank Benoit <benoit@tionex.de>
date	Tue, 21 Apr 2009 10:55:51 +0200
parents
children	b74ac5dfcc06

rev	line source
95 6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	1 /*******************************************************************************
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	2 * Copyright (c) 2006, 2007 IBM Corporation and others.
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	3 * All rights reserved. This program and the accompanying materials
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	4 * are made available under the terms of the Eclipse Public License v1.0
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	5 * which accompanies this distribution, and is available at
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	6 * http://www.eclipse.org/legal/epl-v10.html
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	7 *
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	8 * Contributors:
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	9 * IBM Corporation - initial API and implementation
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	10 *******************************************************************************/
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	11
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	12 package org.eclipse.core.databinding.observable.set;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	13
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	14 import java.util.Collections;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	15 import java.util.HashMap;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	16 import java.util.HashSet;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	17 import java.util.Iterator;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	18 import java.util.Map;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	19 import java.util.Set;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	20
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	21 import org.eclipse.core.databinding.observable.Diffs;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	22 import org.eclipse.core.databinding.observable.Realm;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	23 import org.eclipse.core.databinding.observable.map.IMapChangeListener;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	24 import org.eclipse.core.databinding.observable.map.IObservableMap;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	25 import org.eclipse.core.databinding.observable.map.MapChangeEvent;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	26 import org.eclipse.core.databinding.observable.map.MapDiff;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	27
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	28 /**
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	29 *
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	30 * <p>
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	31 * This class is thread safe. All state accessing methods must be invoked from
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	32 * the {@link Realm#isCurrent() current realm}. Methods for adding and removing
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	33 * listeners may be invoked from any thread.
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	34 * </p>
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	35 *
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	36 * @since 1.0
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	37 *
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	38 */
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	39 public class MappedSet : ObservableSet {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	40
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	41 private final IObservableMap wrappedMap;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	42
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	43 /*
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	44 * Map from values (range elements) to Integer ref counts
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	45 */
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	46 private Map valueCounts = new HashMap();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	47
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	48 private ISetChangeListener domainListener = new class() ISetChangeListener {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	49 public void handleSetChange(SetChangeEvent event) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	50 Set additions = new HashSet();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	51 for (Iterator it = event.diff.getAdditions().iterator(); it.hasNext();) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	52 Object added = it.next();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	53 Object mapValue = wrappedMap.get(added);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	54 if (handleAddition(mapValue)) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	55 additions.add(mapValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	56 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	57 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	58 Set removals = new HashSet();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	59 for (Iterator it = event.diff.getRemovals().iterator(); it.hasNext();) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	60 Object removed = it.next();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	61 Object mapValue = wrappedMap.get(removed);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	62 if (handleRemoval(mapValue)) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	63 removals.add(mapValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	64 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	65 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	66 fireSetChange(Diffs.createSetDiff(additions, removals));
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	67 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	68 };
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	69
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	70 private IMapChangeListener mapChangeListener = new class() IMapChangeListener {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	71 public void handleMapChange(MapChangeEvent event) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	72 MapDiff diff = event.diff;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	73 Set additions = new HashSet();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	74 Set removals = new HashSet();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	75 for (Iterator it = diff.getRemovedKeys().iterator(); it.hasNext();) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	76 Object key = it.next();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	77 Object oldValue = diff.getOldValue(key);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	78 if (handleRemoval(oldValue)) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	79 removals.add(oldValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	80 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	81 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	82 for (Iterator it = diff.getChangedKeys().iterator(); it.hasNext();) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	83 Object key = it.next();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	84 Object oldValue = diff.getOldValue(key);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	85 Object newValue = diff.getNewValue(key);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	86 if (handleRemoval(oldValue)) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	87 removals.add(oldValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	88 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	89 if (handleAddition(newValue)) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	90 additions.add(newValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	91 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	92 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	93 for (Iterator it = diff.getAddedKeys().iterator(); it.hasNext();) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	94 Object key = it.next();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	95 Object newValue = diff.getNewValue(key);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	96 if (handleAddition(newValue)) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	97 additions.add(newValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	98 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	99 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	100 fireSetChange(Diffs.createSetDiff(additions, removals));
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	101 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	102 };
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	103
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	104 private IObservableSet input;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	105
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	106 /**
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	107 * @param input
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	108 * @param map
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	109 */
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	110 public this(IObservableSet input, IObservableMap map) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	111 super(input.getRealm(), Collections.EMPTY_SET, Object.class);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	112 setWrappedSet(valueCounts.keySet());
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	113 this.wrappedMap = map;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	114 this.input = input;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	115 for (Iterator it = input.iterator(); it.hasNext();) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	116 Object element = it.next();
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	117 Object functionValue = wrappedMap.get(element);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	118 handleAddition(functionValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	119 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	120 input.addSetChangeListener(domainListener);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	121 map.addMapChangeListener(mapChangeListener);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	122 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	123
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	124 /**
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	125 * @param mapValue
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	126 * @return true if the given mapValue was an addition
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	127 */
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	128 protected bool handleAddition(Object mapValue) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	129 Integer count = cast(Integer) valueCounts.get(mapValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	130 if (count is null) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	131 valueCounts.put(mapValue, new Integer(1));
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	132 return true;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	133 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	134 valueCounts.put(mapValue, new Integer(count.intValue() + 1));
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	135 return false;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	136 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	137
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	138 /**
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	139 * @param mapValue
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	140 * @return true if the given mapValue has been removed
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	141 */
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	142 protected bool handleRemoval(Object mapValue) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	143 Integer count = cast(Integer) valueCounts.get(mapValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	144 if (count.intValue() <= 1) {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	145 valueCounts.remove(mapValue);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	146 return true;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	147 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	148 valueCounts.put(mapValue, new Integer(count.intValue() - 1));
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	149 return false;
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	150 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	151
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	152 public synchronized void dispose() {
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	153 wrappedMap.removeMapChangeListener(mapChangeListener);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	154 input.removeSetChangeListener(domainListener);
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	155 }
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	156
6208d4f6a277 Added trees for databinding.beans and observable Frank Benoit <benoit@tionex.de> parents: diff changeset	157 }

95

6208d4f6a277 Added trees for databinding.beans and observable