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.agent;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonIgnore;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.fasterxml.jackson.annotation.JsonSubTypes;
  import com.fasterxml.jackson.annotation.JsonTypeInfo;
  import com.google.common.base.Objects;
  import io.libraft.Command;
  import org.hibernate.validator.constraints.NotEmpty;
  
  import javax.validation.constraints.Min;
  
  @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")
  @JsonSubTypes({
          @JsonSubTypes.Type(value = AgentTestCommand.NOPCommand.class, name = "NOP"),
          @JsonSubTypes.Type(value = AgentTestCommand.GETCommand.class, name = "GET"),
          @JsonSubTypes.Type(value = AgentTestCommand.ALLCommand.class, name = "ALL"),
          @JsonSubTypes.Type(value = AgentTestCommand.SETCommand.class, name = "SET"),
          @JsonSubTypes.Type(value = AgentTestCommand.DELCommand.class, name = "DEL")
  })
  abstract class AgentTestCommand implements Command {
  
      private static final String ID = "id";
      private static final String KEY = "key";
      private static final String VALUE = "value";
  
      enum Type {
          NOP,
          GET,
          ALL,
          SET,
          DEL
      }
  
      //----------------------------------------------------------------------------------------------------------------//
  
      @JsonIgnore
      private final Type type;
  
      @Min(0)
      @JsonProperty(ID)
      private final long id;
  
      AgentTestCommand(Type type, long id) {
          this.type = type;
          this.id = id;
      }
  
      public Type getType() {
          return type;
      }
  
      public long getId() {
          return id;
      }
  
      //----------------------------------------------------------------------------------------------------------------//
  
      /**
       * Simple specialization that adds no extra fields over the base command
       */
      static final class NOPCommand extends AgentTestCommand {
  
          NOPCommand(@JsonProperty(ID) long id) {
              super(Type.NOP, id);
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
  
              NOPCommand other = (NOPCommand) o;
  
              return getId() == other.getId();
          }
  
          @Override
          public int hashCode() {
              return Objects.hashCode(getType(), getId());
          }
  
          @Override
          public String toString() {
              return Objects
                      .toStringHelper(this)
                      .add(ID, getId())
                      .toString();
          }
      }
  
      /**
       * Simple command with one extra field more than the base command
       */
      static final class GETCommand extends AgentTestCommand {
  
          @NotEmpty
          @JsonProperty(KEY)
          private final String key;
  
          @JsonCreator
          public GETCommand(@JsonProperty(ID) long id, @JsonProperty(KEY) String key) {
              super(Type.GET, id);
              this.key = key;
          }
  
          String getKey() {
              return key;
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
  
              GETCommand other = (GETCommand) o;
  
              return getId() == other.getId() && key.equals(other.key);
          }
  
          @Override
          public int hashCode() {
              return Objects.hashCode(getType(), getId(), key);
          }
  
          @Override
          public String toString() {
              return Objects
                      .toStringHelper(this)
                      .add(ID, getId())
                      .add(KEY, key)
                      .toString();
          }
      }
  
      /**
       * Identical to the NOP command (except for type)
       */
      static final class ALLCommand extends AgentTestCommand {
  
          ALLCommand(@JsonProperty(ID) long id) {
              super(Type.ALL, id);
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
  
              ALLCommand other = (ALLCommand) o;
  
              return getId() == other.getId();
          }
  
          @Override
          public int hashCode() {
              return Objects.hashCode(getType(), getId());
          }
  
          @Override
          public String toString() {
              return Objects
                      .toStringHelper(this)
                      .add(ID, getId())
                      .toString();
          }
      }
  
      /**
       * Command with more fields than either GET or DEL
       */
      static final class SETCommand extends AgentTestCommand {
  
          @NotEmpty
          @JsonProperty(KEY)
          private final String key;
  
          @NotEmpty
          @JsonProperty(VALUE)
          private final String value;
  
          @JsonCreator
          public SETCommand(@JsonProperty(ID) long id, @JsonProperty(KEY) String key, @JsonProperty(VALUE) String value) {
              super(Type.SET, id);
              this.key = key;
              this.value = value;
          }
  
          String getKey() {
              return key;
          }
  
          String getValue() {
              return value;
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
  
              SETCommand other = (SETCommand) o;
  
              return getId() == other.getId() && key.equals(other.key) && value.equals(other.value);
          }
  
          @Override
          public int hashCode() {
              return Objects.hashCode(getType(), getId(), key, value);
          }
  
          @Override
          public String toString() {
              return Objects
                      .toStringHelper(this)
                      .add(ID, getId())
                      .add(KEY, key)
                      .add(VALUE, value)
                      .toString();
          }
      }
  
      /**
       * Similar to the GET command
       */
      static final class DELCommand extends AgentTestCommand {
  
          @NotEmpty
          @JsonProperty(KEY)
          private final String key;
  
          @JsonCreator
          public DELCommand(@JsonProperty(ID) long id, @JsonProperty(KEY) String key) {
              super(Type.DEL, id);
              this.key = key;
          }
  
          String getKey() {
              return key;
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) return true;
              if (o == null || getClass() != o.getClass()) return false;
  
              DELCommand other = (DELCommand) o;
  
              return getId() == other.getId() && key.equals(other.key);
          }
  
          @Override
          public int hashCode() {
              return Objects.hashCode(getType(), getId(), key);
          }
  
          @Override
          public String toString() {
              return Objects
                      .toStringHelper(this)
                      .add(ID, getId())
                      .add(KEY, key)
                      .toString();
          }
      }
  }