package org.codehaus.plexus.archiver.gzip;

import javax.annotation.Nonnull;
import javax.inject.Named;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.zip.GZIPInputStream;

import org.codehaus.plexus.components.io.attributes.FileAttributes;
import org.codehaus.plexus.components.io.attributes.PlexusIoResourceAttributes;
import org.codehaus.plexus.components.io.resources.PlexusIoCompressedFileResourceCollection;

import static org.codehaus.plexus.archiver.util.Streams.bufferedInputStream;
import static org.codehaus.plexus.archiver.util.Streams.fileInputStream;

/**
 * Abstract base class for compressed files, aka singleton
 * resource collections.
 */
@Named("gzip")
public class PlexusIoGzipResourceCollection extends PlexusIoCompressedFileResourceCollection {

    @Override
    protected String getDefaultExtension() {
        return ".gz";
    }

    @Nonnull
    @Override
    protected InputStream getInputStream(File file) throws IOException {
        return bufferedInputStream(new GZIPInputStream(fileInputStream(file)));
    }

    @Override
    protected PlexusIoResourceAttributes getAttributes(File file) throws IOException {
        return new FileAttributes(file, new HashMap<Integer, String>(), new HashMap<Integer, String>());
    }
}
