crunch-hbase/src/main/java/org/apache/crunch/io/hbase/HBasePairConverter.java

/*
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 *  * 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
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 */
package org.apache.crunch.io.hbase;

import org.apache.crunch.Pair;
import org.apache.crunch.types.Converter;

class HBasePairConverter<K, V> implements Converter<K, V, Pair<K, V>, Pair<K, Iterable<V>>> {

  private Class<K> keyClass;
  private Class<V> valueClass;

  public HBasePairConverter(Class<K> keyClass, Class<V> valueClass) {
    this.keyClass = keyClass;
    this.valueClass = valueClass;
  }

  @Override
  public Pair<K, V> convertInput(K key, V value) {
    return Pair.of(key, value);
  }

  @Override
  public K outputKey(Pair<K, V> value) {
    return value.first();
  }

  @Override
  public V outputValue(Pair<K, V> value) {
    return value.second();
  }

  @Override
  public Class<K> getKeyClass() {
    return keyClass;
  }

  @Override
  public Class<V> getValueClass() {
    return valueClass;
  }

  @Override
  public boolean applyPTypeTransforms() {
    return false;
  }

  @Override
  public Pair<K, Iterable<V>> convertIterableInput(K key, Iterable<V> value) {
    return Pair.of(key, value);
  }
}