Example usage for org.apache.commons.compress.archivers.cpio CpioArchiveInputStream read

Introduction

In this page you can find the example usage for org.apache.commons.compress.archivers.cpio CpioArchiveInputStream read.

Prototype

public int read(byte b[]) throws IOException 

Source Link

Document

Reads some number of bytes from the input stream and stores them into the buffer array b.

Usage

From source file:com.pclinuxos.rpm.util.FileUtils.java

/**
 * The method extracts a srpm into the default directory used by the program (/home/<user>/RCEB/srpms/tmp)
 * /*  w  w  w .j  a va2s  .c om*/
 * @param srpm the srpm to extract
 * @return 0 if the extraction was successfully, -1 if a IOException occurred, -2 if a InterruptException
 *  occurred. Values > 0 for return codes of the rpm2cpio command.
 */
public static int extractSrpm(String srpm) {

    int returnCode = 0;

    try {

        Process extractProcess = Runtime.getRuntime()
                .exec("rpm2cpio " + FileConstants.SRCSRPMS.getAbsolutePath() + "/" + srpm);
        // 64kb buffer
        byte[] buffer = new byte[0xFFFF];
        InputStream inread = extractProcess.getInputStream();

        FileOutputStream out = new FileOutputStream(new File(FileConstants.F4SRPMEX + "archive.cpio"));

        while (inread.read(buffer) != -1) {

            out.write(buffer);
        }

        returnCode = extractProcess.waitFor();

        if (returnCode == 0) {

            CpioArchiveInputStream cpioIn = new CpioArchiveInputStream(
                    new FileInputStream(FileConstants.F4SRPMEX + "archive.cpio"));
            CpioArchiveEntry cpEntry;

            while ((cpEntry = cpioIn.getNextCPIOEntry()) != null) {

                FileOutputStream fOut = new FileOutputStream(FileConstants.F4SRPMEX + cpEntry.getName());
                // Do not make this buffer bigger it breaks the cpio decompression
                byte[] buffer2 = new byte[1];
                ArrayList<Byte> buf = new ArrayList<Byte>();

                while (cpioIn.read(buffer2) != -1) {

                    buf.add(buffer2[0]);
                }

                byte[] file = new byte[buf.size()];

                for (int i = 0; i < buf.size(); i++) {

                    file[i] = buf.get(i);
                }

                fOut.write(file);

                fOut.flush();
                fOut.close();
            }

            cpioIn.close();
        }
    } catch (IOException e) {

        returnCode = -1;
    } catch (InterruptedException e) {

        returnCode = -2;
    }

    new File(FileConstants.F4SRPMEX + "archive.cpio").delete();

    return returnCode;
}

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From source file:com.espringtran.compressor4j.processor.CpioProcessor.java

/**
 * Read from compressed file/*from   ww  w.j av  a2 s .  com*/
 * 
 * @param srcPath
 *            path of compressed file
 * @param fileCompressor
 *            FileCompressor object
 * @throws Exception
 */
@Override
public void read(String srcPath, FileCompressor fileCompressor) throws Exception {
    long t1 = System.currentTimeMillis();
    byte[] data = FileUtil.convertFileToByte(srcPath);
    ByteArrayInputStream bais = new ByteArrayInputStream(data);
    CpioArchiveInputStream ais = new CpioArchiveInputStream(bais);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {
        byte[] buffer = new byte[1024];
        int readByte;
        CpioArchiveEntry entry = ais.getNextCPIOEntry();
        while (entry != null && entry.getSize() > 0) {
            long t2 = System.currentTimeMillis();
            baos = new ByteArrayOutputStream();
            readByte = ais.read(buffer);
            while (readByte != -1) {
                baos.write(buffer, 0, readByte);
                readByte = ais.read(buffer);
            }
            BinaryFile binaryFile = new BinaryFile(entry.getName(), baos.toByteArray());
            fileCompressor.addBinaryFile(binaryFile);
            LogUtil.createAddFileLog(fileCompressor, binaryFile, t2, System.currentTimeMillis());
            entry = ais.getNextCPIOEntry();
        }
    } catch (Exception e) {
        FileCompressor.LOGGER.error("Error on get compressor file", e);
    } finally {
        baos.close();
        ais.close();
        bais.close();
    }
    LogUtil.createReadLog(fileCompressor, srcPath, data.length, t1, System.currentTimeMillis());
}

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