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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.versioning.dao.types;

import com.datastax.driver.mapping.annotations.Transient;
import com.datastax.driver.mapping.annotations.UDT;

@UDT(name = "version", keyspace = "dox")
public class Version {
  public static final String VERSION_STRING_VIOLATION_MSG =
      "Version string must be in the format of: {integer}.{integer}";

  private int major;
  private int minor;
  @Transient
  private VersionStatus status = VersionStatus.Available;

  public Version() {
  }

  public Version(int major, int minor) {
    this.major = major;
    this.minor = minor;
  }

  /**
   * Value of version.
   *
   * @param versionString the version string
   * @return the version
   */
  public static Version valueOf(String versionString) {
    if (versionString == null) {
      return null;
    }
    String[] versionLevels = versionString.split("\\.");
    Version version;
    if (versionLevels.length != 2) {
      throw new IllegalArgumentException(VERSION_STRING_VIOLATION_MSG);
    }
    try {
      version = new Version(Integer.parseInt(versionLevels[0]), Integer.parseInt(versionLevels[1]));
    } catch (Exception ex) {
      throw new IllegalArgumentException(VERSION_STRING_VIOLATION_MSG);
    }

    return version;
  }

  public int getMajor() {
    return major;
  }

  public void setMajor(int major) {
    this.major = major;
  }

  public int getMinor() {
    return minor;
  }

  public void setMinor(int minor) {
    this.minor = minor;
  }

  public VersionStatus getStatus() {
    return status;
  }

  public void setStatus(VersionStatus status) {
    this.status = status;
  }

  public Version calculateNextCandidate() {
    return new Version(major, minor + 1);
  }

  public Version calculateNextFinal() {
    return new Version(major + 1, 0);
  }

  public boolean isFinal() {
    return major != 0 && minor == 0;
  }

  @Override
  public int hashCode() {
    int result = major;
    result = 31 * result + minor;
    return result;
  }

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

    Version version = (Version) obj;
    return major == version.major && minor == version.minor;
  }

  @Override
  public String toString() {
    return major + "." + minor;
  }
}