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There is a newer version: 6.4.2_1

/*
 * 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.lucene.util;

/** Immutable twin of FixedBitSet. */
final class FixedBits implements Bits {

  final FixedBitSet bitSet;

  FixedBits(long[] bits, int length) {
    this.bitSet = new FixedBitSet(bits, length);
  }

  @Override
  public boolean get(int index) {
    return bitSet.get(index);
  }

  @Override
  public void applyMask(FixedBitSet dest, int offset) {
    bitSet.applyMask(dest, offset);
  }

  @Override
  public int length() {
    return bitSet.length();
  }
}