content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.bookkeeper.api.kv.impl.result;
  
  import static io.netty.util.ReferenceCountUtil.release;
  import static io.netty.util.ReferenceCountUtil.retain;
  
  import io.netty.util.Recycler.Handle;
  import lombok.EqualsAndHashCode;
  import lombok.Getter;
  import lombok.Setter;
  import lombok.ToString;
  import lombok.experimental.Accessors;
  import org.apache.bookkeeper.api.kv.result.KeyValue;
  
  /**
   * The implementation of {@link KeyValue}.
   */
  @Accessors(fluent = true, chain = true)
  @Setter
  @Getter
  @ToString(exclude = "handle")
  @EqualsAndHashCode(exclude = "handle")
  public class KeyValueImpl<K, V> implements KeyValue<K, V> {
  
      private final Handle<KeyValueImpl<K, V>> handle;
  
      private K key = null;
      private V value = null;
      private long createRevision = -1L;
      private long modifiedRevision = -1L;
      private long version = -1L;
      private boolean isNumber = false;
      private long numberValue = -1L;
  
      KeyValueImpl(Handle<KeyValueImpl<K, V>> handle) {
          this.handle = handle;
      }
  
      public KeyValueImpl<K, V> key(K key) {
          release(this.key);
          this.key = retain(key);
          return this;
      }
  
      public KeyValueImpl<K, V> value(V value) {
          release(this.value);
          this.value = retain(value);
          return this;
      }
  
      private void reset() {
          release(key);
          key = null;
          release(value);
          value = null;
          createRevision = -1L;
          modifiedRevision = -1L;
          version = -1L;
          isNumber = false;
          numberValue = -1L;
      }
  
      @Override
      public void close() {
          reset();
  
          handle.recycle(this);
      }
  }
  