Examples of org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream

Package org.apache.commons.compress.compressors.gzip

Examples of org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream

org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream
Input stream that decompresses .gz files. This supports decompressing concatenated .gz files which is important when decompressing standalone .gz files.
{@link java.util.zip.GZIPInputStream} doesn't decompress concatenated .gzfiles: it stops after the first member and silently ignores the rest. It doesn't leave the read position to point to the beginning of the next member, which makes it difficult workaround the lack of concatenation support.
Instead of using GZIPInputStream, this class has its own .gz container format decoder. The actual decompression is done with {@link java.util.zip.Inflater}.

            else if (MT_BZIP2.equals(type)) {
                final CompressorInputStream compressedStream = new BZip2CompressorInputStream(bufferedResourceStream);
                importDataArchive(archive, compressedStream, options);
            }
            else if (MT_GZIP.equals(type)) {
                final CompressorInputStream compressedStream = new GzipCompressorInputStream(bufferedResourceStream);
                importDataArchive(archive, compressedStream, options);
            }
            else if (MT_PACK200.equals(type)) {
                final CompressorInputStream compressedStream = new Pack200CompressorInputStream(bufferedResourceStream);
                importDataArchive(archive, compressedStream, options);

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            ArchiveInputStream input;


            /* I am really sad that classes aren't first-class objects in
               Java :'( */
            try {
                input = new TarArchiveInputStream(new GzipCompressorInputStream(new FileInputStream(file)));
            } catch (IOException e) {
                try {
                    input = new TarArchiveInputStream(new BZip2CompressorInputStream(new FileInputStream(file)));
                } catch (IOException e2) {
                    input = new ZipArchiveInputStream(new FileInputStream(file));

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            if (Files.notExists(destDir)) {
                logger.trace("Create dir: {}", destDir);
                Files.createDirectories(destDir);
            }


            TarArchiveInputStream in = new TarArchiveInputStream(new GzipCompressorInputStream(Files.newInputStream(tgzFile)));


            TarArchiveEntry entry;
            while ((entry = in.getNextTarEntry()) != null) {
                if (entry.isDirectory()) {
                    Path dir = destDir.resolve(entry.getName());

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            if (Files.notExists(destDir)) {
                logger.trace("Create dir: {}", destDir);
                Files.createDirectories(destDir);
            }


            TarArchiveInputStream in = new TarArchiveInputStream(new GzipCompressorInputStream(Files.newInputStream(tgzFile)));


            TarArchiveEntry entry;
            while ((entry = in.getNextTarEntry()) != null) {
                if (entry.isDirectory()) {
                    Path dir = destDir.resolve(entry.getName());

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


        } catch (IOException e) {
            throw new CompressorException("Failed to detect Compressor from InputStream.", e);
        }

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        }


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

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    }


    private void extractGzArchive(InputStream tarGz, File tar) throws IOException {
        BufferedInputStream in = new BufferedInputStream(tarGz);
        FileOutputStream out = new FileOutputStream(tar);
        GzipCompressorInputStream gzIn = new GzipCompressorInputStream(in);
        final byte[] buffer = new byte[1000];
        int n = 0;
        while (-1 != (n = gzIn.read(buffer))) {
            out.write(buffer, 0, n);
        }
        out.close();
        gzIn.close();
    }

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    public static void setupTestData() throws IOException {
        tmpDir = new File("tmp");
        tmpDir.mkdir();


        File file = new File(GZipIdentificationRequestTest.class.getResource("/testXmlFile.xml.gz").getFile());
        GzipCompressorInputStream in = new GzipCompressorInputStream(new FileInputStream(file));
        
        Reader reader = new InputStreamReader(in);
        char[] buffer = new char[8192];
        int length;
        StringBuilder sb = new StringBuilder();

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        metaData = new RequestMetaData(null, null, "foo");
        identifier = new RequestIdentifier(URI.create(GzipUtils.getUncompressedFilename(file.toURI().toString())));
        gzRequest = new GZipIdentificationRequest(
                metaData, identifier,
                100, 12000, new File("tmp"));
        GzipCompressorInputStream in = new GzipCompressorInputStream(new FileInputStream(file));
        gzRequest.open(in);
    }

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        file = new File(getClass().getResource("/testXmlFile.xml.gz").getFile());
        identifier = new RequestIdentifier(URI.create(GzipUtils.getUncompressedFilename(file.toURI().toString())));
        gzRequest = new GZipIdentificationRequest(
                new RequestMetaData(12L, 13L, file.getName()), identifier, tmpDir);
        
        GzipCompressorInputStream in = new GzipCompressorInputStream(
                new FileInputStream(file));
        gzRequest.open(in);
        CachedBytes cache = gzRequest.getCache();
        //assertEquals(1, cache.getBuffers().size());
        assertNotNull(cache.getSourceFile());

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