AppVersionKey.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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 org.kaaproject.kaa.server.operations.service.cache;

import java.io.Serializable;

/**
 * The Class AppVersionKey is used to model pair of Application Token and version.
 * Either Profile or Configuration version or App seqNumber may be used, which depends on context.
 *
 * @author ashvayka
 */
public final class AppVersionKey implements Serializable {

  /**
   * The Constant serialVersionUID.
   */
  private static final long serialVersionUID = 1L;

  /**
   * The application token.
   */
  private final String applicationToken;

  /**
   * The version.
   */
  private final int version;

  /**
   * Instantiates a new app version key.
   *
   * @param applicationToken the application token
   * @param version          the version
   */
  public AppVersionKey(String applicationToken, int version) {
    super();
    this.applicationToken = applicationToken;
    this.version = version;
  }

  /* (non-Javadoc)
   * @see java.lang.Object#hashCode()
   */
  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((applicationToken == null) ? 0 : applicationToken.hashCode());
    result = prime * result + version;
    return result;
  }

  /* (non-Javadoc)
   * @see java.lang.Object#equals(java.lang.Object)
   */
  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    AppVersionKey other = (AppVersionKey) obj;
    if (applicationToken == null) {
      if (other.applicationToken != null) {
        return false;
      }
    } else if (!applicationToken.equals(other.applicationToken)) {
      return false;
    }
    if (version != other.version) {
      return false;
    }
    return true;
  }

  /**
   * Gets the application token.
   *
   * @return the application token
   */
  public String getApplicationToken() {
    return applicationToken;
  }

  /**
   * Gets the version.
   *
   * @return the version
   */
  public int getVersion() {
    return version;
  }

  @Override
  public String toString() {
    StringBuilder builder = new StringBuilder();
    builder.append("AppVersionKey [applicationToken=");
    builder.append(applicationToken);
    builder.append(", version=");
    builder.append(version);
    builder.append("]");
    return builder.toString();
  }
}