/**
* 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 com.chinamobile.bcbsp.util;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.io.WritableComparable;
/**
* ID
*
* A general identifier, which internally stores the id as an integer. This is
* the super class of {@link BSPJobID}, {@link StaffID} and
* {@link StaffAttemptID}.
*
* @author
* @version
*/
public abstract class ID implements WritableComparable<ID> {
protected static final char SEPARATOR = '_';
protected int id;
public ID(int id) {
this.id = id;
}
protected ID() {
}
public int getId() {
return id;
}
@Override
public String toString() {
return String.valueOf(id);
}
@Override
public int hashCode() {
return Integer.valueOf(id).hashCode();
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null)
return false;
if (o.getClass() == this.getClass()) {
ID that = ( ID ) o;
return this.id == that.id;
} else
return false;
}
public int compareTo(ID that) {
return this.id - that.id;
}
public void readFields(DataInput in) throws IOException {
this.id = in.readInt();
}
public void write(DataOutput out) throws IOException {
out.writeInt(id);
}
}