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.cassandra.db;
  
  import java.nio.ByteBuffer;
  
  import org.apache.cassandra.db.marshal.ByteBufferAccessor;
  import org.apache.cassandra.db.marshal.ValueAccessor;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  public abstract class AbstractBufferClusteringPrefix extends AbstractOnHeapClusteringPrefix<ByteBuffer>
  {
      public static final ByteBuffer[] EMPTY_VALUES_ARRAY = new ByteBuffer[0];
  
      protected AbstractBufferClusteringPrefix(Kind kind, ByteBuffer[] values)
      {
          super(kind, values);
      }
  
      public ValueAccessor<ByteBuffer> accessor()
      {
          return ByteBufferAccessor.instance;
      }
  
      public ByteBuffer[] getBufferArray()
      {
          return getRawValues();
      }
  
      @Override
      public ClusteringPrefix<ByteBuffer> retainable()
      {
          if (!ByteBufferUtil.canMinimize(values))
              return this;
  
          ByteBuffer[] minimizedValues = ByteBufferUtil.minimizeBuffers(this.values);
          if (kind.isBoundary())
              return accessor().factory().boundary(kind, minimizedValues);
          if (kind.isBound())
              return accessor().factory().bound(kind, minimizedValues);
  
          assert kind() != Kind.STATIC_CLUSTERING;    // not minimizable
          return accessor().factory().clustering(minimizedValues);
      }
  }
  