ceph/src/rocksdb/java/src/main/java/org/rocksdb/DirectComparator.java

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 // This source code is licensed under the BSD-style license found in the
   3 // LICENSE file in the root directory of this source tree. An additional grant
   4 // of patent rights can be found in the PATENTS file in the same directory.
   5
   6 package org.rocksdb;
   7
   8 /**
   9  * Base class for comparators which will receive
  10  * ByteBuffer based access via org.rocksdb.DirectSlice
  11  * in their compare method implementation.
  12  *
  13  * ByteBuffer based slices perform better when large keys
  14  * are involved. When using smaller keys consider
  15  * using @see org.rocksdb.Comparator
  16  */
  17 public abstract class DirectComparator extends AbstractComparator<DirectSlice> {
  18
  19   private final long nativeHandle_;
  20
  21   public DirectComparator(final ComparatorOptions copt) {
  22     super();
  23     this.nativeHandle_ = createNewDirectComparator0(copt.nativeHandle_);
  24   }
  25
  26   @Override
  27   protected final long getNativeHandle() {
  28     return nativeHandle_;
  29   }
  30
  31   private native long createNewDirectComparator0(
  32       final long comparatorOptionsHandle);
  33 }