com.cloudera.crunch.type.DataBridge.java Source code

Introduction

Here is the source code for com.cloudera.crunch.type.DataBridge.java

Source

/**
 * Copyright (c) 2011, Cloudera, Inc. All Rights Reserved.
 *
 * Cloudera, Inc. 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
 *
 * This software 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.cloudera.crunch.type;

import org.apache.commons.lang.builder.HashCodeBuilder;

import com.cloudera.crunch.MapFn;

/**
 * Data structures for transitioning to the DoFns that make up a Crunch MapReduce task 
 * from the raw serialization input from the Hadoop MapReduce framework and back again.
 *
 */
public class DataBridge {
    private final Converter converter;
    private final Class<?> keyClass;
    private final Class<?> valueClass;
    private final MapFn inputMapFn;
    private final MapFn outputMapFn;

    public DataBridge(Class<?> keyClass, Class<?> valueClass, Converter converter, MapFn inputMapFn,
            MapFn outputMapFn) {
        this.keyClass = keyClass;
        this.valueClass = valueClass;
        this.converter = converter;
        this.inputMapFn = inputMapFn;
        this.outputMapFn = outputMapFn;
    }

    public Converter getConverter() {
        return converter;
    }

    public MapFn getInputMapFn() {
        return inputMapFn;
    }

    public MapFn getOutputMapFn() {
        return outputMapFn;
    }

    /*
    public Class<?> getKeyClass() {
      return keyClass;
    }
        
    public Class<?> getValueClass() {
      return valueClass;
    }
    */

    @Override
    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof DataBridge)) {
            return false;
        }
        DataBridge that = (DataBridge) obj;
        return (keyClass.equals(that.keyClass) && valueClass.equals(that.valueClass)
                && converter.equals(that.converter) && inputMapFn.equals(that.inputMapFn)
                && outputMapFn.equals(that.outputMapFn));
    }

    @Override
    public int hashCode() {
        HashCodeBuilder hcb = new HashCodeBuilder();
        hcb.append(keyClass).append(valueClass).append(converter).append(inputMapFn);
        return hcb.append(outputMapFn).toHashCode();
    }
}