/**
* Meant for creating another view of a buffer
*
* @param underlyingBuffer the underlying buffer to create a view from
* @param length the length of the view
* @param offset the offset for the view
*/
protected BaseDataBuffer(DataBuffer underlyingBuffer, int length, int offset) {
this.length = length;
this.offset = offset;
this.allocationMode = underlyingBuffer.allocationMode();
this.elementSize = underlyingBuffer.getElementSize();
this.underlyingLength = underlyingBuffer.underlyingLength() - offset;
this.wrappedDataBuffer = underlyingBuffer;
if (underlyingBuffer.dataType() == Type.DOUBLE) {
if (underlyingBuffer.allocationMode() == AllocationMode.HEAP) {
double[] underlyingArray = (double[]) underlyingBuffer.array();
this.doubleData = underlyingArray;
} else {
ByteBuffer underlyingBuff = underlyingBuffer.asNio();
this.wrappedBuffer = underlyingBuff;
}
} else if (underlyingBuffer.dataType() == Type.FLOAT) {
if (underlyingBuffer.allocationMode() == AllocationMode.HEAP) {
float[] underlyingArray = (float[]) underlyingBuffer.array();
this.floatData = underlyingArray;
} else {
ByteBuffer underlyingBuff = underlyingBuffer.asNio();
this.wrappedBuffer = underlyingBuff;
}
} else if (underlyingBuffer.dataType() == Type.INT) {
if (underlyingBuffer.allocationMode() == AllocationMode.HEAP) {
int[] underlyingArray = (int[]) underlyingBuffer.array();
this.intData = underlyingArray;
} else {
ByteBuffer underlyingBuff = underlyingBuffer.asNio();
this.wrappedBuffer = underlyingBuff;
}
}
}
/**
* Meant for creating another view of a buffer
*
* @param underlyingBuffer the underlying buffer to create a view from
* @param length the length of the view
* @param offset the offset for the view
*/
protected BaseDataBuffer(DataBuffer underlyingBuffer, long length, long offset) {
if (length < 1) throw new IllegalArgumentException("Length must be >= 1");
initTypeAndSize();
this.length = length;
this.offset = offset;
this.allocationMode = underlyingBuffer.allocationMode();
this.elementSize = underlyingBuffer.getElementSize();
this.underlyingLength = underlyingBuffer.underlyingLength();
this.wrappedDataBuffer = underlyingBuffer;
// Adding link to original databuffer
if (underlyingBuffer.originalDataBuffer() == null) {
this.originalBuffer = underlyingBuffer;
this.originalOffset = offset;
} else {
this.originalBuffer = underlyingBuffer.originalDataBuffer();
// FIXME: please don't remove this comment, since there's probably a bug in current offset()
// impl,
// and this line will change originalOffset accroding to proper offset() impl
// FIXME: [email protected]
this.originalOffset = offset; // + underlyingBuffer.originalOffset();
}
if (underlyingBuffer.dataType() == Type.DOUBLE) {
pointer = underlyingBuffer.pointer();
indexer = underlyingBuffer.indexer();
} else if (underlyingBuffer.dataType() == Type.FLOAT) {
pointer = underlyingBuffer.pointer();
indexer = underlyingBuffer.indexer();
} else if (underlyingBuffer.dataType() == Type.INT) {
pointer = underlyingBuffer.pointer();
indexer = underlyingBuffer.indexer();
}
}