org.apache.jackrabbit.core.data.DataIdentifier Maven / Gradle / Ivy
/*
* 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.jackrabbit.core.data;
import java.io.Serializable;
/**
* Opaque data identifier used to identify records in a data store.
* All identifiers must be serializable and implement the standard
* object equality and hash code methods.
*/
public class DataIdentifier implements Serializable {
/**
* Serial version UID.
*/
private static final long serialVersionUID = -9197191401131100016L;
/**
* Data identifier.
*/
private final String identifier;
/**
* Creates a data identifier from the given string.
*
* @param identifier data identifier
*/
public DataIdentifier(String identifier) {
this.identifier = identifier;
}
//-------------------------------------------------------------< Object >
/**
* Returns the identifier string.
*
* @return identifier string
*/
public String toString() {
return identifier;
}
/**
* Checks if the given object is a data identifier and has the same
* string representation as this one.
*
* @param object other object
* @return true
if the given object is the same identifier,
* false
otherwise
*/
public boolean equals(Object object) {
return (object instanceof DataIdentifier)
&& identifier.equals(object.toString());
}
/**
* Returns the hash code of the identifier string.
*
* @return hash code
*/
public int hashCode() {
return identifier.hashCode();
}
}