Source Code Cross Referenced for ByteIdentity.java in  » Database-ORM » JPOX » org » jpox » identity » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » JPOX » org.jpox.identity 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**********************************************************************
002:        Copyright (c) 2007 Andy Jefferson and others. All rights reserved.
003:        Licensed under the Apache License, Version 2.0 (the "License");
004:        you may not use this file except in compliance with the License.
005:        You may obtain a copy of the License at
006:
007:            http://www.apache.org/licenses/LICENSE-2.0
008:
009:        Unless required by applicable law or agreed to in writing, software
010:        distributed under the License is distributed on an "AS IS" BASIS,
011:        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012:        See the License for the specific language governing permissions and
013:        limitations under the License.
014:
015:        Contributors:
016:            ...
017:         **********************************************************************/package org.jpox.identity;
018:
019:        import java.io.IOException;
020:        import java.io.ObjectInput;
021:        import java.io.ObjectOutput;
022:
023:        /**
024:         * Single-Field identity with a byte/Byte field.
025:         * @version 2.0
026:         */
027:        public class ByteIdentity extends SingleFieldIdentity {
028:            private byte key;
029:
030:            /**
031:             * Constructor with class and key.
032:             * @param pcClass the target class
033:             * @param key the key
034:             */
035:            public ByteIdentity(Class pcClass, byte key) {
036:                super (pcClass);
037:                this .key = key;
038:                hashCode = super .hashClassName() ^ this .key;
039:            }
040:
041:            /**
042:             * Constructor with class and key.
043:             * @param pcClass the target class
044:             * @param key the key
045:             */
046:            public ByteIdentity(Class pcClass, Byte key) {
047:                super (pcClass);
048:                setKeyAsObject(key);
049:                this .key = key.byteValue();
050:                hashCode = super .hashClassName() ^ this .key;
051:            }
052:
053:            /**
054:             * Constructor with class and key.
055:             * @param pcClass the target class
056:             * @param str the key
057:             */
058:            public ByteIdentity(Class pcClass, String str) {
059:                super (pcClass);
060:                assertKeyNotNull(str);
061:                this .key = Byte.parseByte(str);
062:                hashCode = super .hashClassName() ^ this .key;
063:            }
064:
065:            /**
066:             * Constructor only for Externalizable.
067:             */
068:            public ByteIdentity() {
069:            }
070:
071:            /**
072:             * Return the key.
073:             * @return the key
074:             */
075:            public byte getKey() {
076:                return key;
077:            }
078:
079:            /**
080:             * Return the String version of the key.
081:             * @return the key.
082:             */
083:            public String toString() {
084:                return Byte.toString(key);
085:            }
086:
087:            /**
088:             * Determine if the other object represents the same object id.
089:             * @param obj the other object
090:             * @return true if both objects represent the same object id
091:             */
092:            public boolean equals(Object obj) {
093:                if (this  == obj) {
094:                    return true;
095:                } else if (!super .equals(obj)) {
096:                    return false;
097:                } else {
098:                    ByteIdentity other = (ByteIdentity) obj;
099:                    return key == other.key;
100:                }
101:            }
102:
103:            /**
104:             * Create the key as an Object.
105:             * @return the key as an Object
106:             */
107:            protected Object createKeyAsObject() {
108:                return new Byte(key);
109:            }
110:
111:            /**
112:             * Write this object. Write the superclass first.
113:             * @param out the output
114:             */
115:            public void writeExternal(ObjectOutput out) throws IOException {
116:                super .writeExternal(out);
117:                out.writeByte(key);
118:            }
119:
120:            /**
121:             * Read this object. Read the superclass first.
122:             * @param in the input
123:             */
124:            public void readExternal(ObjectInput in) throws IOException,
125:                    ClassNotFoundException {
126:                super.readExternal(in);
127:                key = in.readByte();
128:            }
129:        }
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