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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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 com.rapiddweller.common.version;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Date-related implementation of the {@link VersionNumberComponent} interface,
 * which exhibits the same ordinal behavior as a snapshot version.
 * Created: 12.02.2010 09:50:06
 *
 * @author Volker Bergmann
 * @since 0.6.0
 */
public class DateVersionNumberComponent extends VersionNumberComponent {

  private static final long serialVersionUID = 6057638663166486859L;

  private final String dateString;
  private final Date date;

  /**
   * Instantiates a new Date version number component.
   *
   * @param dateString the date string
   * @throws ParseException the parse exception
   */
  public DateVersionNumberComponent(String dateString) throws ParseException {
    this.dateString = dateString;
    this.date = new SimpleDateFormat("yyyyMMdd").parse(dateString);
  }

  @Override
  public int compareTo(VersionNumberComponent that) {
    if (that instanceof DateVersionNumberComponent) {
      return this.date.compareTo(((DateVersionNumberComponent) that).date);
    } else {
      return StringVersionNumberComponent.SNAPSHOT.compareTo(that);
    }
  }

  /**
   * Gets date.
   *
   * @return the date
   */
  public Date getDate() {
    return date;
  }

  @Override
  public String toString() {
    return dateString;
  }

  @Override
  public int hashCode() {
    return date.hashCode();
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null || this.getClass() != obj.getClass()) {
      return false;
    }
    DateVersionNumberComponent that = (DateVersionNumberComponent) obj;
    return this.date.equals(that.date);
  }

}