/*
 * 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.openjpa.util;

import java.util.Date;

/**
 * {@link OpenJPAId} subclass appropriate for Date fields.
 *
 * @author Marc Prud'hommeaux
 */
public final class DateId
    extends OpenJPAId {

    private final Date key;

    public DateId(Class cls, String key) {
        this(cls, new Date(Long.parseLong(key)));
    }

    public DateId(Class cls, Date key) {
        super(cls);
        this.key = key == null ? new Date(0) : key;
    }

    public DateId(Class cls, java.sql.Date key) {
        this(cls, (Date) key);
    }

    public DateId(Class cls, java.sql.Timestamp key) {
        this(cls, (Date) key);
    }

    public DateId(Class cls, Date key, boolean subs) {
        super(cls, subs);
        this.key = key == null ? new Date(0) : key;
    }

    public Date getId() {
        return key;
    }

    public Object getIdObject() {
        return getId();
    }

    public String toString() {
        return Long.toString(key.getTime());
    }

    protected int idHash() {
        return key.hashCode();
    }

    protected boolean idEquals(OpenJPAId o) {
        return key.equals(((DateId) o).key);
    }
}