org.openstreetmap.atlas.streaming.compression.Compressor Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of atlas Show documentation

"Library to load OSM data into an Atlas format"

There is a newer version: 7.0.8

package org.openstreetmap.atlas.streaming.compression;

import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.GZIPOutputStream;

import org.openstreetmap.atlas.exception.CoreException;

/**
 * Compressor for an {@link OutputStream}
 *
 * @author matthieun
 */
public interface Compressor
{
    Compressor NONE = new Compressor()
    {
        @Override
        public OutputStream compress(final OutputStream out)
        {
            return out;
        }

        @Override
        public String toString()
        {
            return "NONE";
        }
    };
    Compressor GZIP = out ->
    {
        try
        {
            return new GZIPOutputStream(out);
        }
        catch (final IOException e)
        {
            throw new CoreException("Cannot create compressor.", e);
        }
    };

    /**
     * @param out
     *            The {@link OutputStream} to compress
     * @return The compressed {@link OutputStream}
     */
    OutputStream compress(OutputStream out);
}