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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 com.rapiddweller.common.comparator.IntComparator;

import java.util.HashMap;
import java.util.Map;

/**
 * {@link VersionNumberComponent} implementation for String-type number components.
 * Created at 07.01.2009 19:07:55
 *
 * @author Volker Bergmann
 * @since 0.5.7
 */
public class StringVersionNumberComponent extends VersionNumberComponent {

  private static final long serialVersionUID = -3865105131640319765L;

  /**
   * The Key order.
   */
  static final String[] KEY_ORDER = {
      "snapshot",
      "alpha",
      "beta",
      "rc", "cr",
      "final", "ga",
      "sp"
  };

  /**
   * The constant SNAPSHOT.
   */
  public static final StringVersionNumberComponent SNAPSHOT = new StringVersionNumberComponent("snapshot");

  /**
   * The Ordinals.
   */
  static final Map ordinals;

  static {
    ordinals = new HashMap<>();
    for (int i = 0; i < KEY_ORDER.length; i++) {
      ordinals.put(KEY_ORDER[i], i);
    }
  }

  /**
   * The Final index.
   */
  static final int FINAL_INDEX = ordinals.get("final");
  /**
   * The Sp index.
   */
  static final int SP_INDEX = ordinals.get("sp");

  private final String key;

  /**
   * Instantiates a new String version number component.
   *
   * @param key the key
   */
  public StringVersionNumberComponent(String key) {
    super();
    this.key = key;
  }

  @Override
  public int compareTo(VersionNumberComponent that) {
    if (that == null) {
      return -1;
    }
    Integer thisIndexObject = ordinals.get(this.key.toLowerCase());
    int thisIndex = (thisIndexObject != null ? thisIndexObject : FINAL_INDEX);
    if (that instanceof NumberVersionNumberComponent) {
      boolean number = ((NumberVersionNumberComponent) that).getNumber() == 0;
      if (number && thisIndex >= SP_INDEX) {
        return 1;
      } else if (number && thisIndex >= FINAL_INDEX) {
        return 0;
      } else {
        return -1;
      }
    }
    Integer thatIndexObject = ordinals.get((((StringVersionNumberComponent) that).key).toLowerCase());
    int thatIndex = (thatIndexObject != null ? thatIndexObject : FINAL_INDEX);
    return IntComparator.compare(thisIndex, thatIndex);
  }

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

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

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    StringVersionNumberComponent that = (StringVersionNumberComponent) obj;
    return this.compareTo(that) == 0;
  }

}