| /******************************************************************************* |
| * Copyright (c) 2000, 2010 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.draw2d.internal; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| public class MultiValueMap { |
| private HashMap map = new HashMap(); |
| |
| public ArrayList get(Object key) { |
| Object value = map.get(key); |
| if (value == null) |
| return null; |
| |
| if (value instanceof ArrayList) |
| return (ArrayList) value; |
| ArrayList v = new ArrayList(1); |
| v.add(value); |
| return v; |
| } |
| |
| public void put(Object key, Object value) { |
| Object existingValues = map.get(key); |
| if (existingValues == null) { |
| map.put(key, value); |
| return; |
| } |
| if (existingValues instanceof ArrayList) { |
| ArrayList v = (ArrayList) existingValues; |
| if (!v.contains(value)) |
| v.add(value); |
| return; |
| } |
| if (existingValues != value) { |
| ArrayList v = new ArrayList(2); |
| v.add(existingValues); |
| v.add(value); |
| map.put(key, v); |
| } |
| } |
| |
| public int remove(Object key, Object value) { |
| Object existingValues = map.get(key); |
| if (existingValues != null) { |
| if (existingValues instanceof ArrayList) { |
| ArrayList v = (ArrayList) existingValues; |
| int result = v.indexOf(value); |
| if (result == -1) |
| return -1; |
| v.remove(result); |
| if (v.isEmpty()) |
| map.remove(key); |
| return result; |
| } |
| if (map.remove(key) != null) |
| return 0; |
| } |
| return -1; |
| } |
| |
| public Object removeValue(Object value) { |
| Iterator iter = map.values().iterator(); |
| Object current; |
| while (iter.hasNext()) { |
| current = iter.next(); |
| if (value.equals(current)) { |
| iter.remove(); |
| return value; |
| } else if (current instanceof List) { |
| if (((List) current).remove(value)) { |
| if (((List) current).isEmpty()) |
| iter.remove(); |
| return value; |
| } |
| } |
| } |
| return null; |
| } |
| |
| public int size() { |
| return map.size(); |
| } |
| } |