indexer.CompressionUtils.java Source code

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Here is the source code for indexer.CompressionUtils.java

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/*
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package indexer;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import org.apache.lucene.util.BytesRef;

/**
 *
 * @author Debasis
 */
public class CompressionUtils {

    static BytesRef compress(String str) {
        ByteArrayOutputStream out = null;
        try {
            out = new ByteArrayOutputStream();
            GZIPOutputStream gzip = new GZIPOutputStream(out);
            gzip.write(str.getBytes());
            gzip.close();
        } catch (Exception ex) {
            return new BytesRef("");
        }
        return out == null ? new BytesRef("") : new BytesRef(out.toByteArray());
    }

    public static String decompress(byte[] bytes) {
        try {
            InputStream in = new GZIPInputStream(new ByteArrayInputStream(bytes));
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[262144]; // about 300kb
            int len;
            while ((len = in.read(buffer)) > 0)
                baos.write(buffer, 0, len);
            return new String(baos.toByteArray(), "UTF-8");
        } catch (Exception e) {
            return "";
        }
    }
}