Example usage for org.apache.poi.util LittleEndian getUByte

Introduction

In this page you can find the example usage for org.apache.poi.util LittleEndian getUByte.

Prototype

public static short getUByte(byte[] data, int offset) 

Source Link

Document

get the unsigned value of a byte.

Usage

From source file:org.ddt.listener.dsi.HeadingPairProperty.java

License:Apache License

/**
 * the constructor./*from   w w  w  . jav  a2  s . c o m*/
 *
 *
 * @param data           the data to read from.
 * @param dataOffset     the offset into the
 * <code>data</code> byte array.
 * @param docPartsOffset the offset of the corresponding docparts.
 * @throws IllegalVariantTypeException  if the data is malformed.
 * @throws UnsupportedEncodingException
 */
HeadingPairProperty(byte[] data, int dataOffset, int docPartsOffset)
        throws IllegalVariantTypeException, UnsupportedEncodingException {
    int off = dataOffset;
    name = new StringProperty(data, off);
    off += name.getSize();
    long type = LittleEndian.getUInt(data, off);
    if (type != Variant.VT_I4) {
        log.log(Level.WARNING, "Not a proper VT_I4 type.");
        throw new IllegalVariantTypeException(type, name);
    }
    off += LittleEndian.INT_SIZE;
    //this is a horrible workaround, around the bug in HPSF, that returns
    //cutoff byte arrays from Section.getProperty() (HPFS Bug #52337)
    //It hopes that there aren't too many parts per heading (i.e. worst
    //case it can be store in one byte...)
    int left = data.length - off;
    if (left >= LittleEndian.INT_SIZE) {
        partsCount = (int) LittleEndian.getUInt(data, off);
        off += LittleEndian.INT_SIZE;
    } else if (left >= LittleEndian.SHORT_SIZE) {
        partsCount = LittleEndian.getShort(data, off);
        off += left;
    } else if (left >= LittleEndian.BYTE_SIZE) {
        partsCount = LittleEndian.getUByte(data, off);
        off += left;
    } else {
        partsCount = 1; //default... maybe not a good idea.
    }
    size = off - dataOffset;

    this.docPartsOffset = docPartsOffset;
}

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From source file:org.ddt.listener.records.DConRefRecord.java

License:Apache License

/**
 * Read constructor.//from  w w  w. ja  v a2s .  c  o  m
 *
 * @param data byte array containing a DConRef Record, including the header.
 */
public DConRefRecord(byte[] data) {
    int offset = 0;
    if (!(LittleEndian.getShort(data, offset) == DConRefRecord.sid))
        throw new RecordFormatException("incompatible sid.");
    offset += LittleEndian.SHORT_SIZE;

    //length = LittleEndian.getShort(data, offset);
    offset += LittleEndian.SHORT_SIZE;

    firstRow = LittleEndian.getUShort(data, offset);
    offset += LittleEndian.SHORT_SIZE;
    lastRow = LittleEndian.getUShort(data, offset);
    offset += LittleEndian.SHORT_SIZE;
    firstCol = LittleEndian.getUByte(data, offset);
    offset += LittleEndian.BYTE_SIZE;
    lastCol = LittleEndian.getUByte(data, offset);
    offset += LittleEndian.BYTE_SIZE;
    charCount = LittleEndian.getUShort(data, offset);
    offset += LittleEndian.SHORT_SIZE;
    if (charCount < 2)
        throw new org.apache.poi.hssf.record.RecordFormatException("Character count must be >= 2");

    charType = LittleEndian.getUByte(data, offset);
    offset += LittleEndian.BYTE_SIZE; //7 bits reserved + 1 bit type

    /*
     * bytelength is the length of the string in bytes, which depends on whether the string is
     * made of single- or double-byte chars. This is given by charType, which equals 0 if
     * single-byte, 1 if double-byte.
     */
    int byteLength = charCount * ((charType & 1) + 1);

    path = LittleEndian.getByteArray(data, offset, byteLength);
    offset += byteLength;

    /*
     * If it's a self reference, the last one or two bytes (depending on char type) are the
     * unused field. Not sure If i need to bother with this...
     */
    if (path[0] == 0x02)
        _unused = LittleEndian.getByteArray(data, offset, (charType + 1));

}

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