com.cloudera.sa.giraph.examples.kmeans.PointWritable.java Source code

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Here is the source code for com.cloudera.sa.giraph.examples.kmeans.PointWritable.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
 * limitations under the License.
 */

package com.cloudera.sa.giraph.examples.kmeans;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Arrays;

import org.apache.hadoop.io.Writable;

public class PointWritable implements Writable {

    private double[] data = new double[0];

    public PointWritable() {
        this.data = new double[0];
    }

    public PointWritable(double[] data) {
        this.data = data;
    }

    public double[] getData() {
        return data;
    }

    public void setData(double[] data) {
        this.data = data;
    }

    public void readFields(DataInput in) throws IOException {
        int length = in.readInt();
        if (data.length != length) {
            data = new double[length];
        }
        for (int i = 0; i < data.length; i++) {
            data[i] = in.readDouble();
        }
    }

    public void write(DataOutput out) throws IOException {
        out.writeInt(data.length);
        for (int i = 0; i < data.length; i++) {
            out.writeDouble(data[i]);
        }
    }

    public int getDimensions() {
        return data.length;
    }

    public String toString() {
        return Arrays.toString(data);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + Arrays.hashCode(data);
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        PointWritable other = (PointWritable) obj;
        if (!Arrays.equals(data, other.data))
            return false;
        return true;
    }

}