Example usage for java.io InputStream skip

Introduction

In this page you can find the example usage for java.io InputStream skip.

Prototype

public long skip(long n) throws IOException

Source Link

Document

Skips over and discards n bytes of data from this input stream.

Usage

From source file:org.mycore.common.content.util.MCRServletContentHelper.java

public static long copyLarge(InputStream input, OutputStream output, long inputOffset, long length,
        byte[] buffer) throws IOException {
    if (inputOffset > 0L) {
        long bytesToSkip = inputOffset;
        while (bytesToSkip > 0) {
            bytesToSkip -= input.skip(bytesToSkip);
        }//from   w ww.  j  a  v  a 2 s  .c  om
    }

    if (length == 0L) {
        return 0L;
    } else {
        int bufferLength = buffer.length;
        int bytesToRead = bufferLength;
        if (length > 0L && length < (long) bufferLength) {
            bytesToRead = (int) length;
        }

        long totalRead = 0L;

        int read;
        while (bytesToRead > 0 && -1 != (read = input.read(buffer, 0, bytesToRead))) {
            output.write(buffer, 0, read);
            totalRead += (long) read;
            if (length > 0L) {
                bytesToRead = (int) Math.min(length - totalRead, (long) bufferLength);
            }
        }

        return totalRead;
    }
}

From source file:com.adobe.communities.ugc.migration.importer.BufferedBase64DecoderStream.java

public BufferedBase64DecoderStream(final long offset, final InputStream inputStream) throws IOException {
    inputStream.skip(offset);
    this.inputStream = inputStream;
    writeBuffer = new char[WRITE_BUFFER_SIZE];
    readToBuffer();// w ww.  j a v  a 2s  .co m
}

From source file:be.fedict.eid.applet.service.signer.odf.ODFSignatureFacet.java

/**
 * Unfortunately zipEntry.getSize() often returns -1/size unknown, so this
 * is a quick hack to see if the file is empty or not
 * //ww w  . ja va 2s.  c  o  m
 * @param inputStream
 * @return
 * @throws IOException
 */
private boolean isEmpty(InputStream inputStream) throws IOException {
    return 0 == inputStream.skip(1);
}

From source file:org.sakaiproject.nakamura.docproxy.AbstractDocumentResult.java

/**
 * {@inheritDoc}//from   w  w w. j a  va 2  s. com
 * @see org.sakaiproject.nakamura.api.docproxy.ExternalDocumentResult#getDocumentInputStream(long, java.lang.String)
 */
@Override
public InputStream getDocumentInputStream(long startingAt, String userId) throws DocProxyException {
    InputStream is = getDocumentInputStream(userId);
    if (is != null) {
        try {
            long skipped = is.skip(startingAt);
            if (skipped < startingAt) {
                LOGGER.warn("Skipped less bytes than requested. Requested {}, actual {}.", startingAt, skipped);
            }
        } catch (IOException e) {
            IOUtils.closeQuietly(is);
            return null;
        }
    }
    return is;
}

From source file:io.druid.segment.realtime.firehose.HttpFirehoseFactory.java

@Override
protected InputStream openObjectStream(URI object, long start) throws IOException {
    if (supportContentRange) {
        final URLConnection connection = object.toURL().openConnection();
        // Set header for range request.
        // Since we need to set only the start offset, the header is "bytes=<range-start>-".
        // See https://tools.ietf.org/html/rfc7233#section-2.1
        connection.addRequestProperty(HttpHeaders.RANGE, StringUtils.format("bytes=%d-", start));
        return connection.getInputStream();
    } else {//from  w w  w  . ja  v  a  2s.  c  o m
        log.warn(
                "Since the input source doesn't support range requests, the object input stream is opened from the start and "
                        + "then skipped. This may make the ingestion speed slower. Consider enabling prefetch if you see this message"
                        + " a lot.");
        final InputStream in = openObjectStream(object);
        in.skip(start);
        return in;
    }
}

From source file:net.yacy.kelondro.util.FileUtils.java

/**
 * Copies a part of a File to an OutputStream.
 * Important : it is the responsibility of the caller to close the destination stream.
 * @param source File instance/*w  ww . j ava  2 s .  c om*/
 * @param dest OutputStream instance
 * @param start Number of bytes to skip from the beginning of the File
 * @throws IOException when a read/write error occurred
 * @throws NullPointerException when a parameter is null
 * @throws IllegalStateException when an error occurred while skipping bytes
 * @see #copy(InputStream source, OutputStream dest)
 * @see #copy(InputStream source, File dest)
 * @see #copy(File source, OutputStream dest)
 * @see #copy(File source, File dest)
 */
public static void copyRange(final File source, final OutputStream dest, final int start) throws IOException {
    InputStream fis = null;
    try {
        fis = new FileInputStream(source);
        final long skipped = fis.skip(start);
        if (skipped != start) {
            throw new IllegalStateException(
                    "Unable to skip '" + start + "' bytes. Only '" + skipped + "' bytes skipped.");
        }
        copy(fis, dest, -1);
    } finally {
        if (fis != null) {
            try {
                fis.close();
            } catch (final Exception e) {
            }
        }
    }
}

From source file:org.apache.jackrabbit.core.value.BLOBFileValue.java

/**
 * {@inheritDoc}/*from   w w w. j ava 2  s. c  o m*/
 */
public int read(byte[] b, long position) throws IOException, RepositoryException {
    InputStream in = getStream();
    in.skip(position);
    return in.read(b);
}

From source file:org.apache.spark.io.GenericFileInputStreamSuite.java

@Test
public void testBytesSkipped() throws IOException {
    for (InputStream inputStream : inputStreams) {
        assertEquals(1024, inputStream.skip(1024));
        for (int i = 1024; i < randomBytes.length; i++) {
            assertEquals(randomBytes[i], (byte) inputStream.read());
        }//w ww  .j ava 2 s  .c  o m
    }
}

From source file:org.apache.spark.io.GenericFileInputStreamSuite.java

@Test
public void testBytesSkippedAfterEOF() throws IOException {
    for (InputStream inputStream : inputStreams) {
        assertEquals(randomBytes.length, inputStream.skip(randomBytes.length + 1));
        assertEquals(-1, inputStream.read());
    }/* ww w  . j  a  v a 2  s . c  om*/
}

From source file:org.apache.spark.io.NioBufferedFileInputStreamSuite.java

@Test
public void testBytesSkipped() throws IOException {
    InputStream inputStream = new NioBufferedFileInputStream(inputFile);
    assertEquals(1024, inputStream.skip(1024));
    for (int i = 1024; i < randomBytes.length; i++) {
        assertEquals(randomBytes[i], (byte) inputStream.read());
    }/* ww  w . ja  v a  2s  .  c o m*/
}