List of usage examples for java.io InputStream skip
public long skip(long n) throws IOException
n bytes of data from this input stream. From source file:org.eclipse.skalli.core.storage.Historian.java
private static void skip(InputStream in, long n) throws IOException { while (n > 0) { n -= in.skip(n); }/*from ww w. j a v a 2 s . co m*/ }
From source file:com.ery.ertc.estorm.util.IOUtils.java
/** * Similar to readFully(). Skips bytes in a loop. * /*w w w .j a va2 s.co m*/ * @param in * The InputStream to skip bytes from * @param len * number of bytes to skip. * @throws IOException * if it could not skip requested number of bytes for any reason * (including EOF) */ public static void skipFully(InputStream in, long len) throws IOException { while (len > 0) { long ret = in.skip(len); if (ret < 0) { throw new IOException("Premature EOF from inputStream"); } len -= ret; } }
From source file:org.apache.hadoop.util.IOUtils.java
/** * Similar to readFully(). Skips bytes in a loop. * @param in The InputStream to skip bytes from * @param len number of bytes to skip./*from w w w . java 2 s. c o m*/ * @throws IOException if it could not skip requested number of bytes * for any reason (including EOF) */ public static void skipFully(InputStream in, long len) throws IOException { long amt = len; while (amt > 0) { long ret = in.skip(amt); if (ret == 0) { // skip may return 0 even if we're not at EOF. Luckily, we can // use the read() method to figure out if we're at the end. int b = in.read(); if (b == -1) { throw new EOFException( "Premature EOF from inputStream after " + "skipping " + (len - amt) + " byte(s)."); } ret = 1; } amt -= ret; } }
From source file:com.redhat.rhn.common.util.FileUtils.java
/** * Read a file off disk into a byte array with specified range * * This can use lots of memory if you read a large file * * @param fileToRead File to read part of into byte array * @param start index of read/*from w w w. j a va 2 s .c o m*/ * @param end index of read * @return byte[] array from file. */ public static byte[] readByteArrayFromFile(File fileToRead, long start, long end) { log.debug("readByteArrayFromFile: " + fileToRead.getAbsolutePath() + " start: " + start + " end: " + end); int size = (int) (end - start); log.debug("size of array: " + size); // Create the byte array to hold the data byte[] bytes = new byte[size]; InputStream is = null; try { is = new FileInputStream(fileToRead); // Read in the bytes int offset = 0; int numRead = 0; // Skip ahead is.skip(start); // start reading while (offset < bytes.length && (numRead) >= 0) { numRead = is.read(bytes, offset, bytes.length - offset); offset += numRead; } } catch (FileNotFoundException fnf) { log.error("Could not read from: " + fileToRead.getAbsolutePath()); throw new RuntimeException(fnf); } catch (IOException e) { log.error("Could not read from: " + fileToRead.getAbsolutePath()); throw new RuntimeException(e); } finally { if (is != null) { try { is.close(); } catch (IOException e) { throw new RuntimeException(e); } } } return bytes; }
From source file:in.goahead.apps.util.URLUtils.java
public static void AppendStream(InputStream inputStream, String outputFileName, long skip) throws IOException { long actualSkip = 0; Logger.debug("Skip length: " + skip + " Actual skip: " + actualSkip); actualSkip = inputStream.skip(skip); Logger.debug("Skip length: " + skip + " Actual skip: " + actualSkip); if (actualSkip == skip) { Logger.debug("Skip length: " + skip + " Actual skip: " + actualSkip); OutputStream os = new FileOutputStream(outputFileName, true); DownloadStream(inputStream, os); os.flush();/*from www. j a va2 s. c o m*/ os.close(); } else { Logger.debug("Skip length: " + skip + " Actual skip: " + actualSkip); } }
From source file:org.jaxygen.invoker.FileDeliveryHandler.java
private static long sendPart(long pos, HttpRangeUtil.Range range, InputStream is, OutputStream os) throws IOException { long initPos = pos; if (range.getStart() > pos) { pos = range.getStart();/* w ww . jav a2 s.co m*/ } long toSkip = pos - initPos; long toSend = range.getEnd() - pos; int b; is.skip((int) toSkip); // TODO: performance improovement needed. for (int i = 0; i <= toSend; i++) { b = is.read(); if (b > -1) { os.write(b); } pos++; } return pos; }
From source file:com.buaa.cfs.utils.IOUtils.java
/** * Similar to readFully(). Skips bytes in a loop. * * @param in The InputStream to skip bytes from * @param len number of bytes to skip.//from w w w .j ava 2s . co m * * @throws IOException if it could not skip requested number of bytes for any reason (including EOF) */ public static void skipFully(InputStream in, long len) throws IOException { long amt = len; while (amt > 0) { long ret = in.skip(amt); if (ret == 0) { // skip may return 0 even if we're not at EOF. Luckily, we can // use the read() method to figure out if we're at the end. int b = in.read(); if (b == -1) { throw new EOFException( "Premature EOF from inputStream after " + "skipping " + (len - amt) + " byte(s)."); } ret = 1; } amt -= ret; } }
From source file:UTF8Util.java
/** * Tries harder to skip the requested number of bytes. * <p>//from w w w .ja va2s .c o m * Note that even if the method fails to skip the requested number of bytes, * it will not throw an exception. If this happens, the caller can be sure * that end-of-stream has been reached. * * @param in byte stream * @param bytesToSkip the number of bytes to skip * @return The number of bytes skipped. * @throws IOException if reading from the stream fails */ public static final long skipPersistent(InputStream in, long bytesToSkip) throws IOException { long skipped = 0; while (skipped < bytesToSkip) { long skippedNow = in.skip(bytesToSkip - skipped); if (skippedNow == 0) { if (in.read() == -1) { // EOF, return what we have and leave it up to caller to // decide what to do about it. break; } else { skippedNow = 1; // Added to count below. } } skipped += skippedNow; } return skipped; }
From source file:org.nuxeo.ecm.platform.ui.web.download.BlobDownloadServlet.java
public static void writeStream(InputStream in, OutputStream out, ByteRange range) throws IOException { BufferingServletOutputStream.stopBuffering(out); byte[] buffer = new byte[BUFFER_SIZE]; long read;/*from w ww. j ava 2s. c o m*/ long offset = range.getStart(); in.skip(offset); while (offset <= range.getEnd() && (read = in.read(buffer)) != -1) { read = Math.min(read, range.getEnd() - offset + 1); out.write(buffer, 0, (int) read); out.flush(); offset += read; } }
From source file:com.exadel.flamingo.flex.messaging.amf.io.AMF0Deserializer.java
public static Document convertToDOM(InputStream is) throws IOException { Document document = null;// w w w. ja v a2 s.c om DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); is.skip(4); // skip length try { DocumentBuilder builder = factory.newDocumentBuilder(); document = builder.parse(new InputSource(is)); } catch (Exception e) { log.error(e, e); throw new IOException("Error while parsing xml: " + e.getMessage()); } return document; }