Example usage for java.io BufferedInputStream mark

Introduction

In this page you can find the example usage for java.io BufferedInputStream mark.

Prototype

public synchronized void mark(int readlimit) 

Source Link

Document

See the general contract of the mark method of InputStream.

Usage

From source file:Hash.Hash.java

private static byte[] startOfScanTiff(File file, BufferedInputStream in) throws IOException {
    in.mark(0);
    int c;//  ww  w.  j av a 2 s .c o  m
    long j = 0;
    Boolean endian = null;
    c = in.read();
    if (c == 73) {
        if (in.read() == 73)
            endian = true;
    } else if (c == 77) {
        if (in.read() == 77)
            endian = false;
    }
    if (endian == null) {
        return null;
    }
    long tiffCheck = readEndianValue(in, 2, endian);
    if (tiffCheck != 42) {
        return null;
    }
    ifdCursor cursor = new ifdCursor(file, endian, readEndianValue(in, 4, endian));
    if (cursor.getPointer() == -1) {
        return null;
    }
    if (cursor.getPointer() == 0) {
        return null;
    }
    return readIFDirectory(cursor, in);
}

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From source file:com.cyberway.issue.crawler.frontier.RecoveryJournal.java

/**
 * Read a line from the given bufferedinputstream into the MutableString.
 * Return true if a line was read; false if EOF. 
 * // w w w .j  a va 2 s .co  m
 * @param is
 * @param read
 * @return True if we read a line.
 * @throws IOException
 */
private static boolean readLine(BufferedInputStream is, MutableString read) throws IOException {
    read.length(0);
    int c = is.read();
    while ((c != -1) && c != '\n' && c != '\r') {
        read.append((char) c);
        c = is.read();
    }
    if (c == -1 && read.length() == 0) {
        // EOF and none read; return false
        return false;
    }
    if (c == '\n') {
        // consume LF following CR, if present
        is.mark(1);
        if (is.read() != '\r') {
            is.reset();
        }
    }
    // a line (possibly blank) was read
    return true;
}

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From source file:immf.Util.java

@SuppressWarnings("unchecked")
public static InputStream png2gif(InputStream is) throws IOException {
    InputStream gis = null;/*  w  w w .  j  a va2s  . c  o m*/
    BufferedInputStream pis = new BufferedInputStream(is);

    try {
        // iPhone iOS??iOS 4.3???????
        pis.mark(0);
        ImageInputStream iis = ImageIO.createImageInputStream(pis);
        Iterator i = ImageIO.getImageReaders(iis);
        if (i.hasNext() && ((ImageReader) i.next()).getFormatName().equals("gif")) {
            // ???gif?????????????
            pis.reset();
            gis = pis;
        }
    } catch (Exception e) {
    } finally {
        pis.reset();
    }
    if (gis != null) {
        return gis;
    }

    // PNG -> GIF?
    try {
        BufferedImage png = ImageIO.read(pis);
        ByteArrayOutputStream converted = new ByteArrayOutputStream();
        if (ImageIO.write(png, "gif", converted)) {
            gis = new ByteArrayInputStream(converted.toByteArray());
        }
    } catch (Exception e) {
    }
    if (gis != null) {
        return gis;
    } else {
        pis.reset();
        return pis;
    }
}

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From source file:com.zimbra.cs.service.FeedManager.java

private static int getLeadingChar(BufferedInputStream is, StringBuilder charset) throws IOException {
    is.mark(128);
    // check for any BOMs that would override the specified charset
    int ch = is.read();
    switch (ch) {
    case 0xEF:/*from   w  w  w.  j a  v  a2  s . co  m*/
        if (is.read() == 0xBB && is.read() == 0xBF) {
            is.mark(128);
            ch = is.read();
            charset.setLength(0);
            charset.append("utf-8");
        }
        break;
    case 0xFE:
        if (is.read() == 0xFF && is.read() == 0x00) {
            ch = is.read();
            charset.setLength(0);
            charset.append("utf-16");
        }
        break;
    case 0xFF:
        if (is.read() == 0xFE) {
            ch = is.read();
            charset.setLength(0);
            charset.append("utf-16");
        }
        break;
    }
    // skip up to 120 bytes of leading whitespace
    for (int index = 0; index < 120 && (ch == '\0' || Character.isWhitespace(ch)); index++)
        ch = is.read();
    // reset to the original state and return the first non-whtespace character
    is.reset();
    return ch;
}

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From source file:util.io.IOUtilities.java

/**
 * This method tries to open an inputstream as gzip and uncompresses it. If it fails,
 * a normal inputstream is returned// w  w w  . j a  va  2  s  .  com
 *
 * @param is Inputstream that could be compressed
 * @return uncompressed inputstream
 * @throws IOException Problems during opening of the Stream
 * @since 3.0
 */
public static InputStream openSaveGZipInputStream(final InputStream is) throws IOException {
    final BufferedInputStream bis = new BufferedInputStream(is);
    bis.mark(64);
    try {
        final InputStream result = new GZIPInputStream(bis);
        return result;
    } catch (final IOException e) {
        e.printStackTrace();
        bis.reset();
        return bis;
    }
}

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From source file:com.seajas.search.contender.scripting.XmlHtmlReader.java

private static String getXMLGuessEncoding(final BufferedInputStream is) throws IOException {
    String encoding = null;/*from   w  ww  .  j ava  2  s.  c  o  m*/
    int[] bytes = new int[4];
    is.mark(4);
    bytes[0] = is.read();
    bytes[1] = is.read();
    bytes[2] = is.read();
    bytes[3] = is.read();
    is.reset();

    if (bytes[0] == 0x00 && bytes[1] == 0x3C && bytes[2] == 0x00 && bytes[3] == 0x3F) {
        encoding = UTF_16BE;
    } else if (bytes[0] == 0x3C && bytes[1] == 0x00 && bytes[2] == 0x3F && bytes[3] == 0x00) {
        encoding = UTF_16LE;
    } else if (bytes[0] == 0x3C && bytes[1] == 0x3F && bytes[2] == 0x78 && bytes[3] == 0x6D) {
        encoding = UTF_8;
    }
    return encoding;
}

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From source file:com.seajas.search.contender.scripting.XmlHtmlReader.java

private static String getBOMEncoding(final BufferedInputStream is) throws IOException {
    String encoding = null;//from   ww  w.  j  ava2s  .  co  m
    int[] bytes = new int[3];
    is.mark(3);
    bytes[0] = is.read();
    bytes[1] = is.read();
    bytes[2] = is.read();

    if (bytes[0] == 0xFE && bytes[1] == 0xFF) {
        encoding = UTF_16BE;
        is.reset();
        is.read();
        is.read();
    } else if (bytes[0] == 0xFF && bytes[1] == 0xFE) {
        encoding = UTF_16LE;
        is.reset();
        is.read();
        is.read();
    } else if (bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF) {
        encoding = UTF_8;
    } else {
        is.reset();
    }
    return encoding;
}

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From source file:com.seajas.search.contender.scripting.XmlHtmlReader.java

/**
 * Returns the encoding declared in <?xml encoding=...?>, or NULL if none.
 * //from  w  ww .ja  va  2 s .  c om
 * @param is
 * @param guessedEnc
 * @return String
 * @throws IOException
 */
private static String getXmlProlog(final BufferedInputStream is, final String guessedEnc) {
    try {
        String encoding = null;

        if (guessedEnc != null) {
            byte[] bytes = new byte[BUFFER_SIZE];
            is.mark(BUFFER_SIZE);
            int offset = 0;
            int max = BUFFER_SIZE;
            int c = is.read(bytes, offset, max);
            int firstGT = -1;
            while (c != -1 && firstGT == -1 && offset < BUFFER_SIZE) {
                offset += c;
                max -= c;
                try {
                    c = is.read(bytes, offset, max);
                } catch (IOException e) {
                    if (offset > 0)
                        is.reset();

                    throw e;
                }
                firstGT = new String(bytes, 0, offset).indexOf(">");
            }
            if (firstGT == -1) {
                if (offset > 0)
                    is.reset();
                if (c == -1) {
                    throw new IOException("Unexpected end of XML stream");
                } else {
                    throw new IOException("XML prolog or ROOT element not found on first " + offset + " bytes");
                }
            }
            int bytesRead = offset;
            if (bytesRead > 0) {
                is.reset();
                Reader reader = new InputStreamReader(new ByteArrayInputStream(bytes, 0, firstGT + 1),
                        guessedEnc);
                BufferedReader bReader = new BufferedReader(reader);
                StringBuffer prolog = new StringBuffer();
                String line = bReader.readLine();
                while (line != null) {
                    prolog.append(line);
                    line = bReader.readLine();
                }
                Matcher m = ENCODING_PATTERN.matcher(prolog);
                if (m.find()) {
                    encoding = m.group(1).toUpperCase();
                    encoding = encoding.substring(1, encoding.length() - 1);
                }
            }
        }
        return encoding;
    } catch (IOException e) {
        if (logger.isDebugEnabled())
            logger.debug("Could not retrieve the XML prolog from the given input: " + e.getMessage());

        return null;
    }
}

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From source file:com.github.benmanes.caffeine.cache.simulator.parser.TextTraceReader.java

/** Returns the input stream, decompressing if required. */
private InputStream readFile(String filePath) throws IOException {
    BufferedInputStream input = new BufferedInputStream(openFile(filePath));
    input.mark(100);
    try {//from  ww w.  ja  v  a2  s .  c  o  m
        return new CompressorStreamFactory().createCompressorInputStream(input);
    } catch (CompressorException e) {
        input.reset();
    }
    try {
        return new ArchiveStreamFactory().createArchiveInputStream(input);
    } catch (ArchiveException e) {
        input.reset();
    }
    return input;
}

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From source file:com.github.benmanes.caffeine.cache.simulator.parser.AbstractTraceReader.java

/** Returns the input stream, decompressing if required. */
private InputStream readFile(String filePath) throws IOException {
    BufferedInputStream input = new BufferedInputStream(openFile(filePath), BUFFER_SIZE);
    input.mark(100);
    try {//from w  w  w .  j  av a  2 s .c  o m
        return new XZInputStream(input);
    } catch (IOException e) {
        input.reset();
    }
    try {
        return new CompressorStreamFactory().createCompressorInputStream(input);
    } catch (CompressorException e) {
        input.reset();
    }
    try {
        return new ArchiveStreamFactory().createArchiveInputStream(input);
    } catch (ArchiveException e) {
        input.reset();
    }
    return input;
}

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