| /* |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| package org.apache.batik.util; |
| |
| |
| /** |
| * A set that uses two keys. |
| * |
| * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a> |
| * @version $Id$ |
| */ |
| public class DoublyIndexedSet { |
| |
| /** |
| * The table to store entries. |
| */ |
| protected DoublyIndexedTable table = new DoublyIndexedTable(); |
| |
| /** |
| * Dummy value object for the table. |
| */ |
| protected static Object value = new Object(); |
| |
| /** |
| * Returns the number of entries in the set. |
| */ |
| public int size() { |
| return table.size(); |
| } |
| |
| /** |
| * Adds an entry to the set. |
| */ |
| public void add(Object o1, Object o2) { |
| table.put(o1, o2, value); |
| } |
| |
| /** |
| * Removes an entry from the set. |
| */ |
| public void remove(Object o1, Object o2) { |
| table.remove(o1, o2); |
| } |
| |
| /** |
| * Returns whether the given keys are in the set. |
| */ |
| public boolean contains(Object o1, Object o2) { |
| return table.get(o1, o2) != null; |
| } |
| |
| /** |
| * Clears the set. |
| */ |
| public void clear() { |
| table.clear(); |
| } |
| } |