Examples of org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream$Data

Package org.apache.commons.compress.compressors.bzip2

Examples of org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream$Data

org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream

An output stream that compresses into the BZip2 format into another stream.

The compression requires large amounts of memory. Thus you should call the {@link #close() close()} method as soon as possible, to forceBZip2CompressorOutputStream to release the allocated memory.

You can shrink the amount of allocated memory and maybe raise the compression speed by choosing a lower blocksize, which in turn may cause a lower compression ratio. You can avoid unnecessary memory allocation by avoiding using a blocksize which is bigger than the size of the input.

You can compute the memory usage for compressing by the following formula:

 <code>400k + (9 * blocksize)</code>.

To get the memory required for decompression by {@link BZip2CompressorInputStream} use

 <code>65k + (5 * blocksize)</code>.

Memory usage by blocksize
Blocksize	Compression memory usage	Decompression memory usage
100k	1300k	565k
200k	2200k	1065k
300k	3100k	1565k
400k	4000k	2065k
500k	4900k	2565k
600k	5800k	3065k
700k	6700k	3565k
800k	7600k	4065k
900k	8500k	4565k

For decompression BZip2CompressorInputStream allocates less memory if the bzipped input is smaller than one block.

Instances of this class are not threadsafe.

TODO: Update to BZip2 1.0.1

@NotThreadSafe

        if ("gz".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            is = new GZIPInputStream(is);
            name = FilenameUtils.removeExtension(name);
            log.debug("   - from GZIP Archive");
        } else if ("bz2".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            is = new BZip2CompressorInputStream(is,
                true); //use true as 2nd param (see http://s.apache.org/QbK) 
            name = FilenameUtils.removeExtension(name);
            log.debug("   - from BZip2 Archive");
        }// TODO: No Zip Files inside Zip Files supported :o( ^^
        Lang format = RDFLanguages.filenameToLang(name);

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                is = new GZIPInputStream(is);
                os = new GZIPOutputStream(os);
                name = FilenameUtils.removeExtension(name);
                log.debug("   - from GZIP Archive");
            } else if ("bz2".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
                is = new BZip2CompressorInputStream(is);
                os = new BZip2CompressorOutputStream(os);
                name = FilenameUtils.removeExtension(name);
                log.debug("   - from BZip2 Archive");
            }// TODO: No Zip File support
            //else no complression

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            in = new ZipInputStream(in);
            ((ZipInputStream)in).getNextEntry();
        } else if("gz".equalsIgnoreCase(extension)) {
            in = new GZIPInputStream(in);
        } else if("bz2".equalsIgnoreCase(extension)) {
            in = new BZip2CompressorInputStream(in);
        }
        return in;
    }

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        if ("gz".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            is = new GZIPInputStream(is);
            name = FilenameUtils.removeExtension(name);
            log.debug("   - from GZIP Archive");
        } else if ("bz2".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            is = new BZip2CompressorInputStream(is);
            name = FilenameUtils.removeExtension(name);
            log.debug("   - from BZip2 Archive");
        } else if ("zip".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            ZipArchiveInputStream zipin = new ZipArchiveInputStream(is);
            ArchiveEntry entry = zipin.getNextEntry();

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            ais = new ZipArchiveInputStream(is);
        } else {
            if ("gz".equals(archiveFormat)) {
                is = new GZIPInputStream(is);
            } else if ("bz2".equals(archiveFormat)) {
                is = new BZip2CompressorInputStream(is);
            } else {
                throw new IllegalStateException("Unsupported compression format " + archiveFormat + "!. "
                                                + "Please report this to stanbol-dev mailing list!");
            }
            ais = new TarArchiveInputStream(is);

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        if ("gz".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            is = new GZIPInputStream(is);
            name = FilenameUtils.removeExtension(name);
            log.debug("   - from GZIP Archive");
        } else if ("bz2".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
            is = new BZip2CompressorInputStream(is);
            name = FilenameUtils.removeExtension(name);
            log.debug("   - from BZip2 Archive");
        }// TODO: No Zip Files inside Zip Files supported :o( ^^
        Lang format = Lang.guess(name);
        // For N-Triple we can use the TDBLoader

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        try {
            int signatureLength = in.read(signature);
            in.reset();


            if (BZip2CompressorInputStream.matches(signature, signatureLength)) {
                return new BZip2CompressorInputStream(in);
            }


            if (GzipCompressorInputStream.matches(signature, signatureLength)) {
                return new GzipCompressorInputStream(in);
            }

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            if (GZIP.equalsIgnoreCase(name)) {
                return new GzipCompressorInputStream(in);
            }


            if (BZIP2.equalsIgnoreCase(name)) {
                return new BZip2CompressorInputStream(in);
            }


            if (PACK200.equalsIgnoreCase(name)) {
                return new Pack200CompressorInputStream(in);
            }

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        System.out.println("unpacking db to "+targetDir);


        TarArchiveEntry entry;
        try (TarArchiveInputStream tis = new TarArchiveInputStream(
                new BZip2CompressorInputStream(
                        new FileInputStream(input))
        )) {
            while ((entry = tis.getNextTarEntry()) != null) {
                File file = new File(targetDir.getParentFile(), entry.getName());
                if (entry.isDirectory()) {

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        stream.reset();


        // Select decompression or unpacking mechanism based on the two bytes
        if (a == 'B' && b == 'Z') {
            metadata.set(Metadata.CONTENT_TYPE, "application/x-bzip");
            decompress(new BZip2CompressorInputStream(stream), xhtml);
        } else if (a == 0x1f && b == 0x8b) {
            metadata.set(Metadata.CONTENT_TYPE, "application/x-gzip");
            decompress(new GZIPInputStream(stream), xhtml);
        } else if (a == 'P' && b == 'K') {
            metadata.set(Metadata.CONTENT_TYPE, "application/zip");

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