StaffID.java

/**
 * 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 java.text.NumberFormat;

/**
 * StaffID
 * 
 * StaffID represents the immutable and unique identifier for a BSP Staff.
 * 
 * @author
 * @version
 */
public class StaffID extends ID {
    protected static final String STAFF = "staff";
    protected static final NumberFormat idFormat = NumberFormat.getInstance();
    static {
        idFormat.setGroupingUsed(false);
        idFormat.setMinimumIntegerDigits(6);
    }

    private BSPJobID jobId;

    public StaffID(BSPJobID jobId, int id) {
        super(id);
        if (jobId == null) {
            throw new IllegalArgumentException("jobId cannot be null");
        }
        this.jobId = jobId;
    }

    public StaffID(String jtIdentifier, int jobId, int id) {
        this(new BSPJobID(jtIdentifier, jobId), id);
    }

    public StaffID() {
        jobId = new BSPJobID();
    }

    /** Returns the {@link BSPJobID} object that this tip belongs to */
    public BSPJobID getJobID() {
        return jobId;
    }

    @Override
    public boolean equals(Object o) {
        if (!super.equals(o))
            return false;

        StaffID that = ( StaffID ) o;
        return this.jobId.equals(that.jobId);
    }

    @Override
    public int compareTo(ID o) {
        StaffID that = ( StaffID ) o;
        int jobComp = this.jobId.compareTo(that.jobId);
        if (jobComp == 0) {
            return this.id - that.id;
        } else {
            return jobComp;
        }
    }

    @Override
    public String toString() {
        return appendTo(new StringBuilder(STAFF)).toString();
    }

    protected StringBuilder appendTo(StringBuilder builder) {
        return jobId.appendTo(builder).append(SEPARATOR).append(
                idFormat.format(id));
    }

    @Override
    public int hashCode() {
        return jobId.hashCode() * 524287 + id;
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        super.readFields(in);
        jobId.readFields(in);
    }

    @Override
    public void write(DataOutput out) throws IOException {
        super.write(out);
        jobId.write(out);
    }

    public static StaffID forName(String str) throws IllegalArgumentException {
        if (str == null)
            return null;
        try {
            String[] parts = str.split("_");
            if (parts.length == 5) {
                if (parts[0].equals(STAFF)) {
                    return new StaffID(parts[1], Integer.parseInt(parts[2]),
                            Integer.parseInt(parts[4]));
                }
            }
        } catch (Exception ex) {
        }
        throw new IllegalArgumentException("StaffId string : " + str
                + " is not properly formed");
    }
}