com.metamx.common.guava.MappedSequence Maven / Gradle / Ivy

/*
 * Copyright 2011,2012 Metamarkets Group Inc.
 *
 * Licensed 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 com.metamx.common.guava;

import com.google.common.base.Function;

/**
 */
public class MappedSequence implements Sequence
{
  private final Sequence baseSequence;
  private final Function fn;

  public MappedSequence(
      Sequence baseSequence,
      Function fn
  )
  {
    this.baseSequence = baseSequence;
    this.fn = fn;
  }

  @Override
  public  OutType accumulate(OutType initValue, Accumulator accumulator)
  {
    return baseSequence.accumulate(initValue, new MappingAccumulator<>(fn, accumulator));
  }

  @Override
  public  Yielder toYielder(OutType initValue, YieldingAccumulator accumulator)
  {
    return baseSequence.toYielder(initValue, new MappingYieldingAccumulator<>(fn, accumulator));
  }
}