/*
 * Copyright 2005-2010 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.wamblee.security;

import java.io.Serializable;

import org.wamblee.persistence.Persistent;

/**
 * Default implementation of Persistent.
 * 
 * @author Erik Brakkee
 */
public abstract class AbstractPersistent implements Persistent {
   
    private Serializable id;

    private Number version;

    protected AbstractPersistent() {
        id = null;
        version = -1;
    }

    /**
     * Copy constructor.
     * 
     * @param aPersistent
     *            Object to copy.
     */
    protected AbstractPersistent(AbstractPersistent aPersistent) {
        id = aPersistent.id;
        version = aPersistent.version;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.persistence.Persistent#getPrimaryKey()
     */
    @Override
    public Serializable getPrimaryKey() {
        return id;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.wamblee.persistence.Persistent#setPrimaryKey(java.io.Serializable)
     */
    @Override
    public void setPrimaryKey(Serializable aKey) {
        id = aKey;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.persistence.Persistent#getPersistedVersion()
     */
    public Number getPersistedVersion() {
        return version;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.wamblee.persistence.Persistent#setPersistedVersion(int)
     */
    public void setPersistedVersion(Number aVersion) {
        version = aVersion;
    }
}