org.jcf.graphicMessage.Id.java Source code

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Here is the source code for org.jcf.graphicMessage.Id.java

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/*
 * Copyright 2002-2005 the original author or authors.
 * 
 * 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.
 */
package org.jcf.graphicMessage;

import java.io.Serializable;

import org.springframework.util.Assert;

/**
 * unique Id based an nikname and id
 * @author FaKod
 *
 */
public class Id implements Serializable {

    /**
     * Version ID
     */
    private static final long serialVersionUID = 1L;

    private String nikName;
    private long id;

    /**
     * Don't use this
     */
    @SuppressWarnings("unused")
    private Id() {
    };

    /**
     * c-tor to use
     * @param nikName
     */
    public Id(String nikName) {
        Assert.hasLength(nikName);
        this.nikName = nikName;
    }

    /**
     * copy ctor
     * @param id object to copy from
     */
    public Id(Id id) {
        Assert.notNull(id);
        this.nikName = id.nikName;
        this.id = id.id;
    }

    /**
     * get the stored nikname (as part of the unique id)
     * @return nikname String
     */
    public String getNikName() {
        return nikName;
    }

    /**
     * get the stored id (as part of the unique id)
     * @return long id
     */
    public long getId() {
        return id;
    }

    /**
     * increments id to get the next value
     */
    synchronized public Id inc() {
        id = id + 1;
        return this;
    }

    /**
     * (non-Javadoc)
     * 
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return nikName + ":" + id;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + (int) (id ^ (id >>> 32));
        result = prime * result + ((nikName == null) ? 0 : nikName.hashCode());
        return result;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final Id other = (Id) obj;
        if (id != other.id)
            return false;
        if (nikName == null) {
            if (other.nikName != null)
                return false;
        } else if (!nikName.equals(other.nikName))
            return false;
        return true;
    }

}