| 1 | /* |
| 2 | * Copyright 2003,2004 The Apache Software Foundation. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.apache.pluto.driver.core; |
| 17 | |
| 18 | import java.io.IOException; |
| 19 | import java.io.ObjectInputStream; |
| 20 | import java.io.ObjectOutputStream; |
| 21 | import java.io.Serializable; |
| 22 | |
| 23 | import org.apache.pluto.PortletWindowID; |
| 24 | |
| 25 | /** |
| 26 | * Wraps around the internal Object IDs. By holding both the string and the |
| 27 | * integer version of an Object ID this class helps speed up the internal |
| 28 | * processing. |
| 29 | * @author <a href="mailto:ddewolf@apache.org">David H. DeWolf</a> |
| 30 | * @author <a href="mailto:zheng@apache.org">ZHENG Zhong</a> |
| 31 | */ |
| 32 | public class PortletWindowIDImpl implements PortletWindowID, Serializable { |
| 33 | |
| 34 | // Private Member Variables ------------------------------------------------ |
| 35 | |
| 36 | private String stringId = null; |
| 37 | private int intId; |
| 38 | |
| 39 | |
| 40 | // Constructor ------------------------------------------------------------- |
| 41 | |
| 42 | /** |
| 43 | * Private constructor that prevents external instantiation. |
| 44 | * @param intId the integer ID. |
| 45 | * @param stringId the string ID. |
| 46 | */ |
| 47 | private PortletWindowIDImpl(int intId, String stringId) { |
| 48 | this.stringId = stringId; |
| 49 | this.intId = intId; |
| 50 | } |
| 51 | |
| 52 | |
| 53 | // PortletWindowID Impl ---------------------------------------------------- |
| 54 | |
| 55 | public String getStringId() { |
| 56 | return stringId; |
| 57 | } |
| 58 | |
| 59 | // Internal Methods -------------------------------------------------------- |
| 60 | |
| 61 | private void readObject(ObjectInputStream stream) throws IOException { |
| 62 | intId = stream.readInt(); |
| 63 | stringId = String.valueOf(intId); |
| 64 | } |
| 65 | |
| 66 | private void writeObject(ObjectOutputStream stream) throws IOException { |
| 67 | stream.write(intId); |
| 68 | } |
| 69 | |
| 70 | // Common Object Methods --------------------------------------------------- |
| 71 | |
| 72 | /** |
| 73 | public boolean equals(Object object) { |
| 74 | boolean result = false; |
| 75 | if (object instanceof PortletWindowIDImpl) { |
| 76 | result = (intId == ((PortletWindowIDImpl) object).intId); |
| 77 | } else if (object instanceof String) { |
| 78 | result = stringId.equals(object); |
| 79 | } else if (object instanceof Integer) { |
| 80 | result = (intId == ((Integer) object).intValue()); |
| 81 | } |
| 82 | return (result); |
| 83 | } |
| 84 | **/ |
| 85 | |
| 86 | public int hashCode() { |
| 87 | return intId; |
| 88 | } |
| 89 | |
| 90 | |
| 91 | // Additional Methods ------------------------------------------------------ |
| 92 | |
| 93 | public int intValue() { |
| 94 | return intId; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Creates a portlet window ID instance from a string. |
| 99 | * @param stringId the string ID from which the instance is created. |
| 100 | * @return a portlet window ID instance created from the string ID. |
| 101 | */ |
| 102 | static public PortletWindowIDImpl createFromString(String stringId) { |
| 103 | char[] id = stringId.toCharArray(); |
| 104 | int _id = 1; |
| 105 | for (int i = 0; i < id.length; i++) { |
| 106 | if ((i % 2) == 0) { |
| 107 | _id *= id[i]; |
| 108 | } else { |
| 109 | _id ^= id[i]; |
| 110 | } |
| 111 | _id = Math.abs(_id); |
| 112 | } |
| 113 | return new PortletWindowIDImpl(_id, stringId); |
| 114 | } |
| 115 | |
| 116 | } |