Example usage for org.apache.commons.compress.compressors.deflate DeflateCompressorInputStream DeflateCompressorInputStream

Introduction

In this page you can find the example usage for org.apache.commons.compress.compressors.deflate DeflateCompressorInputStream DeflateCompressorInputStream.

Prototype

public DeflateCompressorInputStream(final InputStream inputStream, final DeflateParameters parameters) 

Source Link

Document

Creates a new input stream that decompresses Deflate-compressed data from the specified input stream.

Usage

From source file:com.izforge.izpack.installer.unpacker.CompressedFileUnpacker.java

/**
 * Unpacks a pack file./*from w w w  . j  a v  a2 s  . c o m*/
 *
 * @param file            the pack file meta-data
 * @param packInputStream the pack input stream
 * @param target          the target
 * @throws IOException        for any I/O error
 * @throws InstallerException for any installer exception
 */
@Override
public void unpack(PackFile file, InputStream packInputStream, File target)
        throws IOException, InstallerException {
    File tmpfile = File.createTempFile("izpack-uncompress", null, FileUtils.getTempDirectory());
    OutputStream fo = null;
    InputStream finalStream = null;

    try {
        fo = IOUtils.buffer(FileUtils.openOutputStream(tmpfile));
        IOUtils.copyLarge(packInputStream, fo, 0, file.size());
        fo.flush();
        fo.close();

        InputStream in = IOUtils.buffer(FileUtils.openInputStream(tmpfile));

        if (compressionFormat == PackCompression.DEFLATE) {
            DeflateParameters deflateParameters = new DeflateParameters();
            deflateParameters.setCompressionLevel(Deflater.BEST_COMPRESSION);
            finalStream = new DeflateCompressorInputStream(in, deflateParameters);
        } else {
            finalStream = new CompressorStreamFactory().createCompressorInputStream(compressionFormat.toName(),
                    in);
        }

        copy(file, finalStream, target);
    } catch (CompressorException e) {
        throw new IOException(e);
    } finally {
        IOUtils.closeQuietly(fo);
        IOUtils.closeQuietly(finalStream);
        FileUtils.deleteQuietly(tmpfile);
    }
}

---