Java InputStreamWrapper类代码示例

import org.hsqldb.lib.InputStreamWrapper; //导入依赖的package包/类
/**
 * After instantiating a TarEntrySupplicant, the user must either invoke
 * write() or close(), to release system resources on the input
 * File/Stream.
 */
public TarEntrySupplicant(String path, File file,
                          TarFileOutputStream tarStream,
                          long paxThreshold)
        throws FileNotFoundException, TarMalformatException {

    // Must use an expression-embedded ternary here to satisfy compiler
    // that this() call be first statement in constructor.
    this(((path == null)
          ? file.getPath()
          : path), '0', tarStream, paxThreshold);

    // Difficult call for '0'.  binary 0 and character '0' both mean
    // regular file.  Binary 0 pre-UStar is probably more portable,
    // but we are writing a valid UStar header, and I doubt anybody's
    // tar implementation would choke on this since there is no
    // outcry of UStar archives failing to work with older tars.
    if (!file.isFile()) {
        throw new IllegalArgumentException(
            RB.nonfile_entry.getString());
    }

    if (!file.canRead()) {
        throw new IllegalArgumentException(
            RB.read_denied.getString(file.getAbsolutePath()));
    }

    modTime     = file.lastModified() / 1000L;
    fileMode    = TarEntrySupplicant.getLameMode(file);
    dataSize    = file.length();
    inputStream = new InputStreamWrapper(new FileInputStream(file));
}
 

import org.hsqldb.lib.InputStreamWrapper; //导入依赖的package包/类
public void writeAsFiles() throws IOException {

        int bufferSize = 512
                         * DbBackup.generateBufferBlockValue(componentFiles);
        byte[] writeBuffer = new byte[bufferSize];

        checkEssentialFiles();
        FileOutputStream fileOut = null;

        for (int i = 0; i < componentFiles.length; i++) try {
            if (ignoreList[i]) {
                continue;
            }

            if (!componentFiles[i].exists()) {
                continue;
            }

            File outFile = new File(archiveFile, componentFiles[i].getName());
            fileOut = new FileOutputStream(outFile);

            if (componentStreams[i] == null) {
                componentStreams[i] = new InputStreamWrapper(
                    new FileInputStream(componentFiles[i]));
            }

            InputStreamInterface instream = componentStreams[i];

            while (true) {
                int count = instream.read(writeBuffer, 0, writeBuffer.length);

                if (count <= 0) {
                    break;
                }

                fileOut.write(writeBuffer, 0, count);
            }

            instream.close();
            fileOut.flush();
            fileOut.getFD().sync();
        } finally {
            if (fileOut != null) {
                fileOut.close();
                fileOut = null;
            }
        }
    }