com.ricemap.spateDB.util.ImageWritable.java Source code

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Here is the source code for com.ricemap.spateDB.util.ImageWritable.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.ricemap.spateDB.util;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.apache.hadoop.io.Writable;

/**
 * An in-memory image that can be used with MapReduce
 * @author tonyren, eldawy
 *
 */
public class ImageWritable implements Writable {
    /**
     * The underlying image
     */
    private BufferedImage image;

    /**
     * A default constructor is necessary to be readable/writable
     */
    public ImageWritable() {
    }

    @Override
    public void write(DataOutput out) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ImageIO.write(this.image, "png", baos);
        baos.close();
        byte[] bytes = baos.toByteArray();
        out.write(bytes.length);
        out.write(bytes);
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        int length = in.readInt();
        byte[] bytes = new byte[length];
        in.readFully(bytes);
        this.image = ImageIO.read(new ByteArrayInputStream(bytes));
    }

    public BufferedImage getImage() {
        return image;
    }

    public void setImage(BufferedImage image) {
        this.image = image;
    }
}