Combine Error

[cloud]

Hi, may i check is there any errors in my codes as I encountered an error called
"array out of bounds exception" Please advise me.Thank you



public InputStream combine(List<InputStream> slices, IdaInfo info) throws IDAException {

//Prepare output stream (the combined file)
ByteArrayOutputStream osCombinedFile = new ByteArrayOutputStream();

//IdaInfo class helps in managing parameters for the IDA algorithm (size, lengths, mod value etc)
//IdaInfo idainfo = new IdaInfo(5,3);
int m = info.getQuorum(); // if the input number of stream < m, algorithm cannot function

//Check if the List contains enough InputStream to perform the combine() operation.
if(slices.size() < m)
throw new IDAException("Error:combine(List<InputStream>):Ins ufficient slice available for combine operations");

//If the input list > m slices, we remove some, we only need m slices
List<InputStream> lstSlices = new ArrayList<InputStream>();
for (int i = 0; i < m; i++) {
lstSlices.add(slices.get(i));
}

//Retrieve the id of each slice. This is required to get the correct row in the key matrix
int[] sliceIds = null;
int[][] inverse = null;
int[] bytesFromSlices = null;
//use to track the number of bytes of output, this will remove adding padding bytes added previously
//int nOutputCount = 0;
long nOutputCount = info.getDataOffset();

int abyte;
//int nStreamSize = parseSegmentExtraData(lstSlices, sliceIds);
sliceIds = parseSegmentExtraData(lstSlices);
long nStreamSize = info.getDataSize();
//idainfo.setDataSize(nStreamSize);

//Prepare the inverse matrix
//inverse = generateInverse(sliceIds, m_nKeyMatrix);
inverse = generateInverse(sliceIds, info.getMatrix());

for (int i = 0; i < info.getSliceLength(); i++) {
bytesFromSlices = getNextByteFromSlices(lstSlices);
if(bytesFromSlices==null)
break;

for (int j = 0; j < m; j++) {
abyte = mac(bytesFromSlices, inverse[j]);
osCombinedFile.write(abyte);
nOutputCount++;
if(nOutputCount >= nStreamSize) {
//System.out.println("Output Count = " + nOutputCount + ", StreamSize = " + nStreamSize);
break;
}
}
}


//Return an InputStream for ease of use by calling function
return new ByteArrayInputStream(osCombinedFile.toByteArray()) ;

}

[Tolls]

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