| /* |
| * 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.cocoon.portal.pluto.om.common; |
| |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| |
| /** |
| * Wraps around the internal Object IDs. By holding both |
| * the string and the integer version of an Object ID this class |
| * helps speed up the internal processing. |
| * |
| * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a> |
| * |
| * @version CVS $Id$ |
| */ |
| public class ObjectIDImpl |
| implements org.apache.pluto.om.common.ObjectID, java.io.Serializable { |
| |
| private String stringOID; |
| private int intOID; |
| |
| private ObjectIDImpl (int oid, String stringOID) { |
| this.stringOID = stringOID; |
| intOID = oid; |
| } |
| |
| // internal methods. |
| |
| private void readObject (ObjectInputStream stream) throws IOException { |
| intOID = stream.readInt (); |
| |
| stringOID = String.valueOf (intOID); |
| } |
| |
| private void writeObject (ObjectOutputStream stream) throws IOException { |
| stream.write (intOID); |
| } |
| |
| |
| // addtional methods. |
| |
| public boolean equals (Object object) { |
| boolean result = false; |
| |
| if (object instanceof ObjectIDImpl) { |
| result = (intOID == ((ObjectIDImpl) object).intOID); |
| } else if (object instanceof String) { |
| result = stringOID.equals (object); |
| } else if (object instanceof Integer) { |
| result = (intOID == ((Integer)object).intValue()); |
| } |
| return (result); |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#hashCode() |
| */ |
| public int hashCode () { |
| return intOID; |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#toString() |
| */ |
| public String toString () { |
| return stringOID; |
| } |
| |
| public int intValue () { |
| return (intOID); |
| } |
| |
| static public ObjectIDImpl createFromString(String idStr) { |
| char[] id = idStr.toCharArray(); |
| int _id = 1; |
| for (int i=0; i<id.length; i++) { |
| if ((i%2)==0) _id *= id[i]; |
| else _id ^= id[i]; |
| _id = Math.abs(_id); |
| } |
| return new ObjectIDImpl(_id, idStr); |
| } |
| } |