Example usage for java.nio ByteBuffer getChar

Introduction

In this page you can find the example usage for java.nio ByteBuffer getChar.

Prototype

public abstract char getChar(int index);

Source Link

Document

Returns the char at the specified index.

Usage

From source file:Main.java

public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asCharBuffer().put("java2s.com");
    char c = bb.getChar(1);
    System.out.print(c + " ");

}

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From source file:edu.mbl.jif.imaging.mmtiff.MultipageTiffReader.java

public static boolean isMMMultipageTiff(String directory) throws IOException {
    File dir = new File(directory);
    File[] children = dir.listFiles();
    File testFile = null;/* w  w  w.  j a v  a  2 s  .  com*/
    for (File child : children) {
        if (child.isDirectory()) {
            File[] grandchildren = child.listFiles();
            for (File grandchild : grandchildren) {
                if (grandchild.getName().endsWith(".tif")) {
                    testFile = grandchild;
                    break;
                }
            }
        } else if (child.getName().endsWith(".tif") || child.getName().endsWith(".TIF")) {
            testFile = child;
            break;
        }
    }
    if (testFile == null) {
        throw new IOException("Unexpected file structure: is this an MM dataset?");
    }
    RandomAccessFile ra;
    try {
        ra = new RandomAccessFile(testFile, "r");
    } catch (FileNotFoundException ex) {
        ReportingUtils.logError(ex);
        return false;
    }
    FileChannel channel = ra.getChannel();
    ByteBuffer tiffHeader = ByteBuffer.allocate(36);
    ByteOrder bo;
    channel.read(tiffHeader, 0);
    char zeroOne = tiffHeader.getChar(0);
    if (zeroOne == 0x4949) {
        bo = ByteOrder.LITTLE_ENDIAN;
    } else if (zeroOne == 0x4d4d) {
        bo = ByteOrder.BIG_ENDIAN;
    } else {
        throw new IOException("Error reading Tiff header");
    }
    tiffHeader.order(bo);
    int summaryMDHeader = tiffHeader.getInt(32);
    channel.close();
    ra.close();
    if (summaryMDHeader == MultipageTiffWriter.SUMMARY_MD_HEADER) {
        return true;
    }
    return false;
}

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From source file:edu.mbl.jif.imaging.mmtiff.MultipageTiffReader.java

private IFDEntry readDirectoryEntry(int offset, ByteBuffer buffer) throws IOException {
    char tag = buffer.getChar(offset);
    char type = buffer.getChar(offset + 2);
    long count = unsignInt(buffer.getInt(offset + 4));
    long value;/*from w ww .ja  v  a 2  s.c o  m*/
    if (type == 3 && count == 1) {
        value = buffer.getChar(offset + 8);
    } else {
        value = unsignInt(buffer.getInt(offset + 8));
    }
    return (new IFDEntry(tag, type, count, value));
}

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From source file:edu.mbl.jif.imaging.mmtiff.MultipageTiffReader.java

private IFDData readIFD(long byteOffset) throws IOException {
    ByteBuffer buff = readIntoBuffer(byteOffset, 2);
    int numEntries = buff.getChar(0);

    ByteBuffer entries = readIntoBuffer(byteOffset + 2, numEntries * 12 + 4).order(byteOrder_);
    IFDData data = new IFDData();
    for (int i = 0; i < numEntries; i++) {
        IFDEntry entry = readDirectoryEntry(i * 12, entries);
        if (entry.tag == MM_METADATA) {
            data.mdOffset = entry.value;
            data.mdLength = entry.count;
        } else if (entry.tag == STRIP_OFFSETS) {
            data.pixelOffset = entry.value;
        } else if (entry.tag == STRIP_BYTE_COUNTS) {
            data.bytesPerImage = entry.value;
        }//from  www. j a  va2s.  c  o  m
    }
    data.nextIFD = unsignInt(entries.getInt(numEntries * 12));
    data.nextIFDOffsetLocation = byteOffset + 2 + numEntries * 12;
    return data;
}

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From source file:edu.mbl.jif.imaging.mmtiff.MultipageTiffReader.java

private long readHeader() throws IOException {
    ByteBuffer tiffHeader = ByteBuffer.allocate(8);
    fileChannel_.read(tiffHeader, 0);/*from   w  ww  . j  av  a2s  .  c om*/
    char zeroOne = tiffHeader.getChar(0);
    if (zeroOne == 0x4949) {
        byteOrder_ = ByteOrder.LITTLE_ENDIAN;
    } else if (zeroOne == 0x4d4d) {
        byteOrder_ = ByteOrder.BIG_ENDIAN;
    } else {
        throw new IOException("Error reading Tiff header");
    }
    tiffHeader.order(byteOrder_);
    short twoThree = tiffHeader.getShort(2);
    if (twoThree != 42) {
        throw new IOException("Tiff identifier code incorrect");
    }
    return unsignInt(tiffHeader.getInt(4));
}

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