| /* |
| * Copyright 2005 The Apache Software Foundation. |
| * |
| * Licensed 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. |
| */ |
| |
| /* |
| * StringIdentity.java |
| * |
| */ |
| |
| package javax.jdo.identity; |
| |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| |
| import javax.jdo.JDOUserException; |
| |
| /** This class is for identity with a single String field. |
| * @version 2.0 |
| */ |
| public class StringIdentity extends SingleFieldIdentity { |
| |
| /** The key is stored in the superclass field keyAsObject. |
| */ |
| |
| /** Constructor with class and key. |
| * @param pcClass the class |
| * @param key the key |
| */ |
| public StringIdentity (Class pcClass, String key) { |
| super (pcClass); |
| setKeyAsObject(key); |
| hashCode = hashClassName() ^ key.hashCode(); |
| } |
| |
| /** Constructor only for Externalizable. |
| */ |
| public StringIdentity () { |
| } |
| |
| /** Return the key. |
| * @return the key |
| */ |
| public String getKey () { |
| return (String)keyAsObject; |
| } |
| |
| /** Return the String form of the key. |
| * @return the String form of the key |
| */ |
| public String toString () { |
| return (String)keyAsObject; |
| } |
| |
| /** Determine if the other object represents the same object id. |
| * @param obj the other object |
| * @return true if both objects represent the same object id |
| */ |
| public boolean equals (Object obj) { |
| if (this == obj) { |
| return true; |
| } else if (!super.equals (obj)) { |
| return false; |
| } else { |
| StringIdentity other = (StringIdentity) obj; |
| return keyAsObject.equals(other.keyAsObject); |
| } |
| } |
| |
| /** Write this object. Write the superclass first. |
| * @param out the output |
| */ |
| public void writeExternal(ObjectOutput out) throws IOException { |
| super.writeExternal (out); |
| out.writeObject(keyAsObject); |
| } |
| |
| /** Read this object. Read the superclass first. |
| * @param in the input |
| */ |
| public void readExternal(ObjectInput in) |
| throws IOException, ClassNotFoundException { |
| super.readExternal (in); |
| keyAsObject = (String)in.readObject(); |
| } |
| } |