org.mrgeo.vector.mrsvector.VectorTileWritable.java Source code

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Here is the source code for org.mrgeo.vector.mrsvector.VectorTileWritable.java

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/*
 * Copyright 2009-2015 DigitalGlobe, Inc.
 *
 * Licensed 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 org.mrgeo.vector.mrsvector;

import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.compress.*;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

public class VectorTileWritable extends BytesWritable {

    public VectorTileWritable() {
    }

    public VectorTileWritable(final byte[] bytes) {
        super(bytes);
    }

    public static VectorTile toMrsVector(final VectorTileWritable writable, final CompressionCodec codec,
            final Decompressor decompressor) throws IOException {
        decompressor.reset();
        final ByteArrayInputStream bis = new ByteArrayInputStream(writable.getBytes(), 0, writable.getLength());
        final CompressionInputStream gis = codec.createInputStream(bis, decompressor);
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        IOUtils.copyBytes(gis, baos, 1024 * 1024 * 2, true);

        byte[] data = baos.toByteArray();
        return VectorTile.fromProtobuf(data, 0, data.length);
    }

    public static VectorTile toMrsVector(final VectorTileWritable writable) throws IOException {
        return VectorTile.fromProtobuf(writable.getBytes(), 0, writable.getLength());
    }

    public static VectorTileWritable toWritable(final VectorTile vector, final CompressionCodec codec,
            final Compressor compressor) throws IOException {
        compressor.reset();

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        final CompressionOutputStream cos = codec.createOutputStream(baos, compressor);

        vector.toProtobuf(cos);

        return new VectorTileWritable(baos.toByteArray());
    }

    public static VectorTileWritable toWritable(final VectorTile feature) throws IOException {
        byte[] bytes = feature.toProtobuf();

        return new VectorTileWritable(bytes);
    }

}