content: /*
   * Copyright (c) 2013 - 2014, Allen A. George <allen dot george at gmail dot com>
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of libraft nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package io.libraft.kayvee.api;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.google.common.base.Objects;
  import org.hibernate.validator.constraints.NotEmpty;
  
  import javax.annotation.Nullable;
  
  /**
   * Java representation of a JSON {@code key=>value} pair defined in the KayVee REST API.
   */
  public final class KeyValue {
  
      private static final String KEY = "key";
      private static final String VALUE = "value";
  
      @NotEmpty
      @JsonProperty(KEY)
      private final String key;
  
      @NotEmpty
      @JsonProperty(VALUE)
      private final String value;
  
      /**
       * Constructor.
       *
       * @param key non-null, non-empty key
       * @param value non-null, non-empty value associated with this key
       */
      @JsonCreator
      public KeyValue(@JsonProperty(KEY) String key, @JsonProperty(VALUE) String value) {
          this.key = key;
          this.value = value;
      }
  
      /**
       * Get the key for this {@code key=>value} pair.
       *
       * @return non-null, non-empty key
       */
      public String getKey() {
          return key;
      }
  
      /**
       * Get the value for this {@code key=>value} pair.
       *
       * @return non-null, non-empty value
       */
      public String getValue() {
          return value;
      }
  
      @Override
      public boolean equals(@Nullable Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
  
          KeyValue other = (KeyValue) o;
  
          return key.equals(other.key) && value.equals(other.value);
      }
  
      @Override
      public int hashCode() {
          return Objects.hashCode(key, value);
      }
  
      @Override
      public String toString() {
          return Objects
                  .toStringHelper(this)
                  .add(KEY, key)
                  .add(VALUE, value)
                  .toString();
      }
  }
  