com.openpojo.reflection.java.version.impl.VersionImp Maven / Gradle / Ivy

/*
 * Copyright (c) 2010-2018 Osman Shoukry
 *
 * 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.openpojo.reflection.java.version.impl;

import java.util.List;

import com.openpojo.reflection.java.version.Version;
import com.openpojo.reflection.java.version.VersionParser;

/**
 * @author oshoukry
 */
public class VersionImp implements Version {

  private final String version;
  private final List parts;

  public VersionImp(String version) {
    this.version = version;
    parts = VersionParser.getVersionParts(version);
  }

  public String getVersion() {
    return version;
  }

  @SuppressWarnings("ReturnOfNull")
  public Integer getPart(int idx) {
    if (idx < 0 || idx >= parts.size())
      return null;
    return parts.get(idx);
  }

  public int compareTo(Version right) {
    int idx = 0;
    Integer leftPart;
    Integer rightPart;

    do {
      leftPart = this.getPart(idx);
      rightPart = right.getPart(idx);
      idx++;

      if (leftPart == null && rightPart == null)
        return 0;

      if (leftPart == null)
        return -1;

      if (rightPart == null)
        return 1;

      if (leftPart < rightPart)
        return -1;

      if (leftPart > rightPart)
        return 1;

    } while (true);
  }
}