com.cloudera.crunch.Tuple3.java Source code

Introduction

Here is the source code for com.cloudera.crunch.Tuple3.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;

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

/**
 * A convenience class for three-element {@link Tuple}s.
 */
public class Tuple3<V1, V2, V3> implements Tuple {

    private final V1 first;
    private final V2 second;
    private final V3 third;

    public static <A, B, C> Tuple3<A, B, C> of(A a, B b, C c) {
        return new Tuple3<A, B, C>(a, b, c);
    }

    public Tuple3(V1 first, V2 second, V3 third) {
        this.first = first;
        this.second = second;
        this.third = third;
    }

    public V1 first() {
        return first;
    }

    public V2 second() {
        return second;
    }

    public V3 third() {
        return third;
    }

    public Object get(int index) {
        switch (index) {
        case 0:
            return first;
        case 1:
            return second;
        case 2:
            return third;
        default:
            throw new ArrayIndexOutOfBoundsException();
        }
    }

    public int size() {
        return 3;
    }

    @Override
    public int hashCode() {
        HashCodeBuilder hcb = new HashCodeBuilder();
        return hcb.append(first).append(second).append(third).toHashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Tuple3 other = (Tuple3) obj;
        return (first == other.first || (first != null && first.equals(other.first)))
                && (second == other.second || (second != null && second.equals(other.second)))
                && (third == other.third || (third != null && third.equals(other.third)));
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder("Tuple3[");
        sb.append(first).append(",").append(second).append(",").append(third);
        return sb.append("]").toString();
    }
}