Example usage for java.io BufferedInputStream markSupported

List of usage examples for java.io BufferedInputStream markSupported

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Introduction

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

Prototype

public boolean markSupported()

Source Link

Document

Tests if this input stream supports the mark and reset methods.

Usage

From source file:edu.harvard.iq.dvn.ingest.statdataio.impl.plugins.dta.DTAFileReaderSpi.java

@Override
public boolean canDecodeInput(BufferedInputStream stream) throws IOException {
    if (stream == null) {
        throw new IllegalArgumentException("stream == null!");
    }/*from   w  w w  .  j av  a 2 s. c o  m*/

    dbgLog.fine("applying the dta test\n");

    byte[] b = new byte[DTA_HEADER_SIZE];

    if (stream.markSupported()) {
        stream.mark(0);
    }
    int nbytes = stream.read(b, 0, DTA_HEADER_SIZE);

    if (nbytes == 0) {
        throw new IOException();
    }
    //printHexDump(b, "hex dump of the byte-array");

    if (stream.markSupported()) {
        stream.reset();
    }

    boolean DEBUG = false;

    dbgLog.info("hex dump: 1st 4bytes =>" + new String(Hex.encodeHex(b)) + "<-");

    if (b[2] != 1) {
        dbgLog.fine("3rd byte is not 1: given file is not stata-dta type");
        return false;
    } else if ((b[1] != 1) && (b[1] != 2)) {
        dbgLog.fine("2nd byte is neither 0 nor 1: this file is not stata-dta type");
        return false;
    } else if (!DTAFileReaderSpi.stataReleaseNumber.containsKey(b[0])) {
        dbgLog.fine("1st byte (" + b[0] + ") is not within the ingestable range [rel. 3-10]:"
                + "this file is NOT stata-dta type");
        return false;
    } else {
        dbgLog.fine("this file is stata-dta type: " + DTAFileReaderSpi.stataReleaseNumber.get(b[0])
                + "(No in HEX=" + b[0] + ")");
        return true;
    }

}

From source file:edu.harvard.iq.dataverse.ingest.tabulardata.impl.plugins.por.PORFileReaderSpi.java

@Override
public boolean canDecodeInput(Object source) throws IOException {
    if (!(source instanceof BufferedInputStream)) {
        return false;
    }//w  w  w. ja  v a 2s  .  c o  m
    if (source == null) {
        throw new IllegalArgumentException("source == null!");
    }
    BufferedInputStream stream = (BufferedInputStream) source;
    dbgLog.fine("applying the por test\n");

    byte[] b = new byte[POR_HEADER_SIZE];

    if (stream.markSupported()) {
        stream.mark(0);
    }

    int nbytes = stream.read(b, 0, POR_HEADER_SIZE);

    //printHexDump(b, "hex dump of the byte-array");

    if (nbytes == 0) {
        throw new IOException();
    } else if (nbytes < 491) {
        // size test
        dbgLog.fine("this file is NOT spss-por type");
        return false;
    }

    if (stream.markSupported()) {
        stream.reset();
    }

    boolean DEBUG = false;

    //windows [0D0A]=>   [1310] = [CR/LF]
    //unix    [0A]  =>   [10]
    //mac     [0D]  =>   [13]
    // 3char  [0D0D0A]=> [131310] spss for windows rel 15
    // expected results
    // unix    case: [0A]   : [80], [161], [242], [323], [404], [485]
    // windows case: [0D0A] : [81], [163], [245], [327], [409], [491]
    //  : [0D0D0A] : [82], [165], [248], [331], [414], [495]

    // convert b into a ByteBuffer

    ByteBuffer buff = ByteBuffer.wrap(b);
    byte[] nlch = new byte[36];
    int pos1;
    int pos2;
    int pos3;
    int ucase = 0;
    int wcase = 0;
    int mcase = 0;
    int three = 0;
    int nolines = 6;
    int nocols = 80;
    for (int i = 0; i < nolines; ++i) {
        int baseBias = nocols * (i + 1);
        // 1-char case
        pos1 = baseBias + i;
        buff.position(pos1);
        dbgLog.finer("\tposition(1)=" + buff.position());
        int j = 6 * i;
        nlch[j] = buff.get();

        if (nlch[j] == 10) {
            ucase++;
        } else if (nlch[j] == 13) {
            mcase++;
        }

        // 2-char case
        pos2 = baseBias + 2 * i;
        buff.position(pos2);
        dbgLog.finer("\tposition(2)=" + buff.position());

        nlch[j + 1] = buff.get();
        nlch[j + 2] = buff.get();

        // 3-char case
        pos3 = baseBias + 3 * i;
        buff.position(pos3);
        dbgLog.finer("\tposition(3)=" + buff.position());

        nlch[j + 3] = buff.get();
        nlch[j + 4] = buff.get();
        nlch[j + 5] = buff.get();

        dbgLog.finer(i + "-th iteration position =" + nlch[j] + "\t" + nlch[j + 1] + "\t" + nlch[j + 2]);
        dbgLog.finer(i + "-th iteration position =" + nlch[j + 3] + "\t" + nlch[j + 4] + "\t" + nlch[j + 5]);

        if ((nlch[j + 3] == 13) && (nlch[j + 4] == 13) && (nlch[j + 5] == 10)) {
            three++;
        } else if ((nlch[j + 1] == 13) && (nlch[j + 2] == 10)) {
            wcase++;
        }

        buff.rewind();
    }
    if (three == nolines) {
        dbgLog.fine("0D0D0A case");
        windowsNewLine = false;
    } else if ((ucase == nolines) && (wcase < nolines)) {
        dbgLog.fine("0A case");
        windowsNewLine = false;
    } else if ((ucase < nolines) && (wcase == nolines)) {
        dbgLog.fine("0D0A case");
    } else if ((mcase == nolines) && (wcase < nolines)) {
        dbgLog.fine("0D case");
        windowsNewLine = false;
    }

    buff.rewind();
    int PORmarkPosition = POR_MARK_POSITION_DEFAULT;
    if (windowsNewLine) {
        PORmarkPosition = PORmarkPosition + 5;
    } else if (three == nolines) {
        PORmarkPosition = PORmarkPosition + 10;
    }

    byte[] pormark = new byte[8];
    buff.position(PORmarkPosition);
    buff.get(pormark, 0, 8);
    String pormarks = new String(pormark);

    dbgLog.fine(
            "pormark[hex: 53 50 53 53 50 4F 52 54 == SPSSPORT] =>" + new String(Hex.encodeHex(pormark)) + "<-");

    if (pormarks.equals(POR_MARK)) {
        dbgLog.fine("this file is spss-por type");
        return true;
    } else {
        dbgLog.fine("this file is NOT spss-por type");
    }
    return false;
}

From source file:edu.harvard.iq.dataverse.ingest.tabulardata.impl.plugins.por.PORFileReaderSpi.java

@Override
public boolean canDecodeInput(BufferedInputStream stream) throws IOException {
    if (stream == null) {
        throw new IllegalArgumentException("file == null!");
    }//from   ww w  . j a va  2  s.c o  m

    dbgLog.fine("applying the por test\n");

    byte[] b = new byte[POR_HEADER_SIZE];

    if (stream.markSupported()) {
        stream.mark(0);
    }

    int nbytes = stream.read(b, 0, POR_HEADER_SIZE);

    //printHexDump(b, "hex dump of the byte-array");

    if (nbytes == 0) {
        throw new IOException();
    } else if (nbytes < 491) {
        // size test
        dbgLog.fine("this file is NOT spss-por type");
        return false;
    }

    if (stream.markSupported()) {
        stream.reset();
    }

    boolean DEBUG = false;

    //windows [0D0A]=>   [1310] = [CR/LF]
    //unix    [0A]  =>   [10]
    //mac     [0D]  =>   [13]
    // 3char  [0D0D0A]=> [131310] spss for windows rel 15
    // expected results
    // unix    case: [0A]   : [80], [161], [242], [323], [404], [485]
    // windows case: [0D0A] : [81], [163], [245], [327], [409], [491]
    //  : [0D0D0A] : [82], [165], [248], [331], [414], [495]

    // convert b into a ByteBuffer

    ByteBuffer buff = ByteBuffer.wrap(b);
    byte[] nlch = new byte[36];
    int pos1;
    int pos2;
    int pos3;
    int ucase = 0;
    int wcase = 0;
    int mcase = 0;
    int three = 0;
    int nolines = 6;
    int nocols = 80;
    for (int i = 0; i < nolines; ++i) {
        int baseBias = nocols * (i + 1);
        // 1-char case
        pos1 = baseBias + i;
        buff.position(pos1);
        dbgLog.finer("\tposition(1)=" + buff.position());
        int j = 6 * i;
        nlch[j] = buff.get();

        if (nlch[j] == 10) {
            ucase++;
        } else if (nlch[j] == 13) {
            mcase++;
        }

        // 2-char case
        pos2 = baseBias + 2 * i;
        buff.position(pos2);
        dbgLog.finer("\tposition(2)=" + buff.position());

        nlch[j + 1] = buff.get();
        nlch[j + 2] = buff.get();

        // 3-char case
        pos3 = baseBias + 3 * i;
        buff.position(pos3);
        dbgLog.finer("\tposition(3)=" + buff.position());

        nlch[j + 3] = buff.get();
        nlch[j + 4] = buff.get();
        nlch[j + 5] = buff.get();

        dbgLog.finer(i + "-th iteration position =" + nlch[j] + "\t" + nlch[j + 1] + "\t" + nlch[j + 2]);
        dbgLog.finer(i + "-th iteration position =" + nlch[j + 3] + "\t" + nlch[j + 4] + "\t" + nlch[j + 5]);

        if ((nlch[j + 3] == 13) && (nlch[j + 4] == 13) && (nlch[j + 5] == 10)) {
            three++;
        } else if ((nlch[j + 1] == 13) && (nlch[j + 2] == 10)) {
            wcase++;
        }

        buff.rewind();
    }
    if (three == nolines) {
        dbgLog.fine("0D0D0A case");
        windowsNewLine = false;
    } else if ((ucase == nolines) && (wcase < nolines)) {
        dbgLog.fine("0A case");
        windowsNewLine = false;
    } else if ((ucase < nolines) && (wcase == nolines)) {
        dbgLog.fine("0D0A case");
    } else if ((mcase == nolines) && (wcase < nolines)) {
        dbgLog.fine("0D case");
        windowsNewLine = false;
    }

    buff.rewind();
    int PORmarkPosition = POR_MARK_POSITION_DEFAULT;
    if (windowsNewLine) {
        PORmarkPosition = PORmarkPosition + 5;
    } else if (three == nolines) {
        PORmarkPosition = PORmarkPosition + 10;
    }

    byte[] pormark = new byte[8];
    buff.position(PORmarkPosition);
    buff.get(pormark, 0, 8);
    String pormarks = new String(pormark);

    //dbgLog.fine("pormark =>" + pormarks + "<-");
    dbgLog.fine(
            "pormark[hex: 53 50 53 53 50 4F 52 54 == SPSSPORT] =>" + new String(Hex.encodeHex(pormark)) + "<-");

    if (pormarks.equals(POR_MARK)) {
        dbgLog.fine("this file is spss-por type");
        return true;
    } else {
        dbgLog.fine("this file is NOT spss-por type");
    }
    return false;
}

From source file:edu.harvard.iq.dvn.ingest.statdataio.impl.plugins.por.PORFileReader.java

private File decodeHeader(BufferedInputStream stream) throws IOException {
    File tempPORfile = null;//from  w w w .jav  a  2s . c  o  m

    if (stream == null) {
        throw new IllegalArgumentException("file == null!");
    }

    byte[] headerByes = new byte[POR_HEADER_SIZE];

    if (stream.markSupported()) {
        stream.mark(1000);
    }
    int nbytes = stream.read(headerByes, 0, POR_HEADER_SIZE);

    //printHexDump(headerByes, "hex dump of the byte-array");

    if (nbytes == 0) {
        throw new IOException("decodeHeader: reading failure");
    } else if (nbytes < 491) {
        // Size test: by defnition, it must have at least
        // 491-byte header, i.e., the file size less than this threshold
        // is not a POR file
        dbgLog.fine("this file is NOT spss-por type");
        throw new IllegalArgumentException("file is not spss-por type");
    }
    // rewind the current reading position back to the beginning
    if (stream.markSupported()) {
        stream.reset();
    }

    // line-terminating characters are usually one or two by defnition
    // however, a POR file saved by a genuine SPSS for Windows
    // had a three-character line terminator, i.e., failed to remove the
    // original file's one-character terminator when it was opened, and
    // saved it with the default two-character terminator without
    // removing original terminators. So we have to expect such a rare
    // case
    //
    // terminator
    // windows [0D0A]=>   [1310] = [CR/LF]
    // unix    [0A]  =>   [10]
    // mac     [0D]  =>   [13]
    // 3char  [0D0D0A]=> [131310] spss for windows rel 15
    //
    // terminating characters should be found at the following
    //                             column positions[counting from 0]:
    // unix    case: [0A]   : [80], [161], [242], [323], [404], [485]
    // windows case: [0D0A] : [81], [163], [245], [327], [409], [491]
    //           : [0D0D0A] : [82], [165], [248], [331], [414], [495]

    // convert b into a ByteBuffer

    ByteBuffer buff = ByteBuffer.wrap(headerByes);
    byte[] nlch = new byte[36];
    int pos1;
    int pos2;
    int pos3;
    int ucase = 0;
    int wcase = 0;
    int mcase = 0;
    int three = 0;
    int nolines = 6;
    int nocols = 80;
    for (int i = 0; i < nolines; ++i) {
        int baseBias = nocols * (i + 1);
        // 1-char case
        pos1 = baseBias + i;
        buff.position(pos1);
        dbgLog.finer("\tposition(1)=" + buff.position());
        int j = 6 * i;
        nlch[j] = buff.get();

        if (nlch[j] == 10) {
            ucase++;
        } else if (nlch[j] == 13) {
            mcase++;
        }

        // 2-char case
        pos2 = baseBias + 2 * i;
        buff.position(pos2);
        dbgLog.finer("\tposition(2)=" + buff.position());

        nlch[j + 1] = buff.get();
        nlch[j + 2] = buff.get();

        // 3-char case
        pos3 = baseBias + 3 * i;
        buff.position(pos3);
        dbgLog.finer("\tposition(3)=" + buff.position());

        nlch[j + 3] = buff.get();
        nlch[j + 4] = buff.get();
        nlch[j + 5] = buff.get();

        dbgLog.finer(i + "-th iteration position =" + nlch[j] + "\t" + nlch[j + 1] + "\t" + nlch[j + 2]);
        dbgLog.finer(i + "-th iteration position =" + nlch[j + 3] + "\t" + nlch[j + 4] + "\t" + nlch[j + 5]);

        if ((nlch[j + 3] == 13) && (nlch[j + 4] == 13) && (nlch[j + 5] == 10)) {
            three++;
        } else if ((nlch[j + 1] == 13) && (nlch[j + 2] == 10)) {
            wcase++;
        }

        buff.rewind();
    }

    boolean windowsNewLine = true;
    if (three == nolines) {
        windowsNewLine = false; // lineTerminator = "0D0D0A"
    } else if ((ucase == nolines) && (wcase < nolines)) {
        windowsNewLine = false; // lineTerminator = "0A"
    } else if ((ucase < nolines) && (wcase == nolines)) {
        windowsNewLine = true; //lineTerminator = "0D0A"
    } else if ((mcase == nolines) && (wcase < nolines)) {
        windowsNewLine = false; //lineTerminator = "0D"
    }

    buff.rewind();
    int PORmarkPosition = POR_MARK_POSITION_DEFAULT;
    if (windowsNewLine) {
        PORmarkPosition = PORmarkPosition + 5;
    } else if (three == nolines) {
        PORmarkPosition = PORmarkPosition + 10;
    }

    byte[] pormark = new byte[8];
    buff.position(PORmarkPosition);
    buff.get(pormark, 0, 8);
    String pormarks = new String(pormark);

    //dbgLog.fine("pormark =>" + pormarks + "<-");
    dbgLog.fine(
            "pormark[hex: 53 50 53 53 50 4F 52 54 == SPSSPORT] =>" + new String(Hex.encodeHex(pormark)) + "<-");

    if (pormarks.equals(POR_MARK)) {
        dbgLog.fine("POR ID toke test: Passed");
        init();

        smd.getFileInformation().put("mimeType", MIME_TYPE);
        smd.getFileInformation().put("fileFormat", MIME_TYPE);

    } else {
        dbgLog.fine("this file is NOT spss-por type");
        throw new IllegalArgumentException("decodeHeader: POR ID token was not found");
    }

    // save the POR file without new line characters

    FileOutputStream fileOutPOR = null;
    Writer fileWriter = null;

    // Scanner class can handle three-character line-terminator
    Scanner porScanner = null;

    try {
        tempPORfile = File.createTempFile("tempPORfile.", ".por");
        fileOutPOR = new FileOutputStream(tempPORfile);
        fileWriter = new BufferedWriter(new OutputStreamWriter(fileOutPOR, "utf8"));
        porScanner = new Scanner(stream);

        // Because 64-bit and 32-bit machines decode POR's first 40-byte
        // sequence differently, the first 5 leader lines are skipped from
        // the new-line-stripped file

        int lineCounter = 0;
        while (porScanner.hasNextLine()) {
            lineCounter++;
            if (lineCounter <= 5) {
                String line = porScanner.nextLine().toString();
                dbgLog.fine("line=" + lineCounter + ":" + line.length() + ":" + line);
            } else {
                fileWriter.write(porScanner.nextLine().toString());
            }
        }
    } finally {
        try {
            if (fileWriter != null) {
                fileWriter.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }

        if (porScanner != null) {
            porScanner.close();
        }
    }

    return tempPORfile;
}

From source file:edu.harvard.iq.dataverse.ingest.tabulardata.impl.plugins.por.PORFileReader.java

private File decodeHeader(BufferedInputStream stream) throws IOException {
    dbgLog.fine("decodeHeader(): start");
    File tempPORfile = null;//from  ww  w  . j  a  v a  2  s  . c o  m

    if (stream == null) {
        throw new IllegalArgumentException("file == null!");
    }

    byte[] headerByes = new byte[POR_HEADER_SIZE];

    if (stream.markSupported()) {
        stream.mark(1000);
    }
    int nbytes = stream.read(headerByes, 0, POR_HEADER_SIZE);

    //printHexDump(headerByes, "hex dump of the byte-array");

    if (nbytes == 0) {
        throw new IOException("decodeHeader: reading failure");
    } else if (nbytes < 491) {
        // Size test: by defnition, it must have at least
        // 491-byte header, i.e., the file size less than this threshold
        // is not a POR file
        dbgLog.fine("this file is NOT spss-por type");
        throw new IllegalArgumentException("file is not spss-por type");
    }
    // rewind the current reading position back to the beginning
    if (stream.markSupported()) {
        stream.reset();
    }

    // line-terminating characters are usually one or two by defnition
    // however, a POR file saved by a genuine SPSS for Windows
    // had a three-character line terminator, i.e., failed to remove the
    // original file's one-character terminator when it was opened, and
    // saved it with the default two-character terminator without
    // removing original terminators. So we have to expect such a rare
    // case
    //
    // terminator
    // windows [0D0A]=>   [1310] = [CR/LF]
    // unix    [0A]  =>   [10]
    // mac     [0D]  =>   [13]
    // 3char  [0D0D0A]=> [131310] spss for windows rel 15
    //
    // terminating characters should be found at the following
    //                             column positions[counting from 0]:
    // unix    case: [0A]   : [80], [161], [242], [323], [404], [485]
    // windows case: [0D0A] : [81], [163], [245], [327], [409], [491]
    //           : [0D0D0A] : [82], [165], [248], [331], [414], [495]

    // convert b into a ByteBuffer

    ByteBuffer buff = ByteBuffer.wrap(headerByes);
    byte[] nlch = new byte[36];
    int pos1;
    int pos2;
    int pos3;
    int ucase = 0;
    int wcase = 0;
    int mcase = 0;
    int three = 0;
    int nolines = 6;
    int nocols = 80;
    for (int i = 0; i < nolines; ++i) {
        int baseBias = nocols * (i + 1);
        // 1-char case
        pos1 = baseBias + i;
        buff.position(pos1);
        dbgLog.finer("\tposition(1)=" + buff.position());
        int j = 6 * i;
        nlch[j] = buff.get();

        if (nlch[j] == 10) {
            ucase++;
        } else if (nlch[j] == 13) {
            mcase++;
        }

        // 2-char case
        pos2 = baseBias + 2 * i;
        buff.position(pos2);
        dbgLog.finer("\tposition(2)=" + buff.position());

        nlch[j + 1] = buff.get();
        nlch[j + 2] = buff.get();

        // 3-char case
        pos3 = baseBias + 3 * i;
        buff.position(pos3);
        dbgLog.finer("\tposition(3)=" + buff.position());

        nlch[j + 3] = buff.get();
        nlch[j + 4] = buff.get();
        nlch[j + 5] = buff.get();

        dbgLog.finer(i + "-th iteration position =" + nlch[j] + "\t" + nlch[j + 1] + "\t" + nlch[j + 2]);
        dbgLog.finer(i + "-th iteration position =" + nlch[j + 3] + "\t" + nlch[j + 4] + "\t" + nlch[j + 5]);

        if ((nlch[j + 3] == 13) && (nlch[j + 4] == 13) && (nlch[j + 5] == 10)) {
            three++;
        } else if ((nlch[j + 1] == 13) && (nlch[j + 2] == 10)) {
            wcase++;
        }

        buff.rewind();
    }

    boolean windowsNewLine = true;
    if (three == nolines) {
        windowsNewLine = false; // lineTerminator = "0D0D0A"
    } else if ((ucase == nolines) && (wcase < nolines)) {
        windowsNewLine = false; // lineTerminator = "0A"
    } else if ((ucase < nolines) && (wcase == nolines)) {
        windowsNewLine = true; //lineTerminator = "0D0A"
    } else if ((mcase == nolines) && (wcase < nolines)) {
        windowsNewLine = false; //lineTerminator = "0D"
    }

    buff.rewind();
    int PORmarkPosition = POR_MARK_POSITION_DEFAULT;
    if (windowsNewLine) {
        PORmarkPosition = PORmarkPosition + 5;
    } else if (three == nolines) {
        PORmarkPosition = PORmarkPosition + 10;
    }

    byte[] pormark = new byte[8];
    buff.position(PORmarkPosition);
    buff.get(pormark, 0, 8);
    String pormarks = new String(pormark);

    //dbgLog.fine("pormark =>" + pormarks + "<-");
    dbgLog.fine(
            "pormark[hex: 53 50 53 53 50 4F 52 54 == SPSSPORT] =>" + new String(Hex.encodeHex(pormark)) + "<-");

    if (pormarks.equals(POR_MARK)) {
        dbgLog.fine("POR ID toke test: Passed");
        init();

        dataTable.setOriginalFileFormat(MIME_TYPE);
        dataTable.setUnf("UNF:6:NOTCALCULATED");

    } else {
        dbgLog.fine("this file is NOT spss-por type");
        throw new IllegalArgumentException("decodeHeader: POR ID token was not found");
    }

    // save the POR file without new line characters

    FileOutputStream fileOutPOR = null;
    Writer fileWriter = null;

    // Scanner class can handle three-character line-terminator
    Scanner porScanner = null;

    try {
        tempPORfile = File.createTempFile("tempPORfile.", ".por");
        fileOutPOR = new FileOutputStream(tempPORfile);
        fileWriter = new BufferedWriter(new OutputStreamWriter(fileOutPOR, "utf8"));
        porScanner = new Scanner(stream);

        // Because 64-bit and 32-bit machines decode POR's first 40-byte
        // sequence differently, the first 5 leader lines are skipped from
        // the new-line-stripped file

        int lineCounter = 0;
        while (porScanner.hasNextLine()) {
            lineCounter++;
            if (lineCounter <= 5) {
                String line = porScanner.nextLine();
                dbgLog.fine("line=" + lineCounter + ":" + line.length() + ":" + line);
            } else {
                fileWriter.write(porScanner.nextLine());
            }
        }
    } finally {
        try {
            if (fileWriter != null) {
                fileWriter.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }

        if (porScanner != null) {
            porScanner.close();
        }
    }

    return tempPORfile;
}

From source file:edu.harvard.iq.dataverse.ingest.tabulardata.impl.plugins.sav.SAVFileReader.java

void decodeHeader(BufferedInputStream stream) throws IOException {
    dbgLog.fine("decodeHeader(): start");

    if (stream == null) {
        throw new IllegalArgumentException("stream == null!");
    }//w w w .j  a  v a 2  s .  c  om
    // the length of the magic number is 4 (1-byte character * 4)
    // its value is expected to be $FL2

    byte[] b = new byte[SAV_MAGIC_NUMBER_LENGTH];

    try {
        if (stream.markSupported()) {
            stream.mark(100);
        }
        int nbytes = stream.read(b, 0, SAV_MAGIC_NUMBER_LENGTH);

        if (nbytes == 0) {
            throw new IOException();
        }

    } catch (IOException ex) {
        //ex.printStackTrace();
        throw ex;
    }

    //printHexDump(b, "hex dump of the byte-array");

    String hdr4sav = new String(b);
    dbgLog.fine("from string=" + hdr4sav);

    if (hdr4sav.equals(SAV_FILE_SIGNATURE)) {
        dbgLog.fine("this file is spss-sav type");
        // initialize version-specific parameter
        init();

        dataTable.setOriginalFileFormat(MIME_TYPE[0]);

        dataTable.setUnf("UNF:6:");

    } else {
        dbgLog.fine("this file is NOT spss-sav type");

        throw new IllegalArgumentException("given file is not spss-sav type");
    }

    dbgLog.fine("***** decodeHeader(): end *****");

}

From source file:edu.harvard.iq.dvn.ingest.statdataio.impl.plugins.sav.SAVFileReader.java

void decodeHeader(BufferedInputStream stream) throws IOException {
    dbgLog.fine("***** decodeHeader(): start *****");

    if (stream == null) {
        throw new IllegalArgumentException("stream == null!");
    }// w  w w  . j  a v  a  2 s  .  c o  m
    // the length of the magic number is 4 (1-byte character * 4)
    // its value is expected to be $FL2

    byte[] b = new byte[SAV_MAGIC_NUMBER_LENGTH];

    try {
        if (stream.markSupported()) {
            stream.mark(100);
        }
        int nbytes = stream.read(b, 0, SAV_MAGIC_NUMBER_LENGTH);

        if (nbytes == 0) {
            throw new IOException();
        }

    } catch (IOException ex) {
        //ex.printStackTrace();
        throw ex;
    }

    //printHexDump(b, "hex dump of the byte-array");

    String hdr4sav = new String(b);
    dbgLog.fine("from string=" + hdr4sav);

    if (hdr4sav.equals(SAV_FILE_SIGNATURE)) {
        dbgLog.fine("this file is spss-sav type");
        // initialize version-specific parameter
        init();

        smd.getFileInformation().put("mimeType", MIME_TYPE[0]);
        smd.getFileInformation().put("fileFormat", MIME_TYPE[0]);

    } else {
        dbgLog.fine("this file is NOT spss-sav type");

        throw new IllegalArgumentException("given file is not spss-sav type");
    }

    smd.getFileInformation().put("charset", defaultCharSet);
    dbgLog.fine("smd dump:" + smd.toString());
    dbgLog.fine("***** decodeHeader(): end *****");

}

From source file:org.apache.flex.compiler.filespecs.CombinedFile.java

/**
 * Get the BOM tag of a stream./*from  ww  w . j  a  va  2s .c  o  m*/
 * 
 * @param strm BufferedInputStream to be checked.
 * @return {@link BOM} type.
 * @throws IOException Error.
 */
public static BOM getBOM(BufferedInputStream strm) throws IOException {
    assert (strm.markSupported()) : "getBOM call on stream which does not support mark";

    // Peek the first 4 bytes.
    final byte[] peek = new byte[4];
    strm.mark(4);
    strm.read(peek);
    strm.reset();

    // Try matching 4-byte BOM tags.
    final byte[] quadruplet = Arrays.copyOf(peek, 4);
    if (Arrays.equals(BOM.UTF_32_BE.pattern, quadruplet))
        return BOM.UTF_32_BE;
    else if (Arrays.equals(BOM.UTF_32_LE.pattern, quadruplet))
        return BOM.UTF_32_LE;

    // Try matching 3-byte BOM tags.
    final byte[] triplet = Arrays.copyOf(peek, 3);
    if (Arrays.equals(BOM.UTF_8.pattern, triplet))
        return BOM.UTF_8;

    // Try matching 2-byte BOM tags.
    final byte[] twin = Arrays.copyOf(peek, 2);
    if (Arrays.equals(BOM.UTF_16_BE.pattern, twin))
        return BOM.UTF_16_BE;
    else if (Arrays.equals(BOM.UTF_16_LE.pattern, twin))
        return BOM.UTF_16_LE;

    // No BOM tag.
    return BOM.NONE;
}

From source file:org.opf_labs.fmts.fidget.TikaIdentifier.java

static final IdentificationResult fromStream(final MimeTypes mimeRepo, final InputStream stream, URI loc) {
    // Get a buffered input stream that supports marks
    BufferedInputStream mrkStr = new BufferedInputStream(stream);
    assert (mrkStr.markSupported());
    // put the mark at the begining, and should be comfortable for Tika id
    // length/*  w w  w.  j av a2 s.  co  m*/
    mrkStr.mark(mimeRepo.getMinLength() * 2);
    // identify and time
    long start = new Date().getTime();
    MediaType mime = identify(mimeRepo, stream, loc);
    long duration = new Date().getTime() - start;
    // Now reset the stream and hash
    IdentificationResult result;
    try {
        mrkStr.reset();
        result = new IdentificationResult(hash64K(stream), loc, mime, duration);
    } catch (IOException excep) {
        // OK couldn't read or hash stream, record error and what we have
        result = new IdentificationResult("", IdentificationResult.ERROR_LOC, mime, duration);
    }
    return result;
}