public void toArray()

in ch-commons-util/src/main/java/com/cloudhopper/commons/util/ByteBuffer.java [804:847]
32 lines of code
4 McCabe index (conditional complexity)

    public void toArray(int offset, int length, byte[] targetBuffer, int targetOffset) {

        // validate the offset, length are ok
        ByteBuffer.checkOffsetLength(size(), offset, length);

        // validate the offset, length are ok
        ByteBuffer.checkOffsetLength(targetBuffer.length, targetOffset, length);

        // will we have a large enough byte[] allocated?
        if (targetBuffer.length < length) {
            throw new IllegalArgumentException("TargetBuffer size must be large enough to hold a byte[] of at least a size=" + length);
        }

        // are we actually copying any data?
        if (length > 0) {

            // create adjusted versions of read and write positions based
            // on the offset and length passed into this method
            int offsetReadPosition = (this.currentReadPosition + offset) % this.buffer.length;
            int offsetWritePosition = (this.currentReadPosition + offset + length) % this.buffer.length;

            if (offsetReadPosition >= offsetWritePosition) {
                System.arraycopy(
                    this.buffer,
                    offsetReadPosition,
                    targetBuffer,
                    targetOffset,
                    this.buffer.length - offsetReadPosition);
                System.arraycopy(
                    this.buffer,
                    0,
                    targetBuffer,
                    targetOffset + this.buffer.length - offsetReadPosition,
                    offsetWritePosition);
            } else {
                System.arraycopy(
                    this.buffer,
                    offsetReadPosition,
                    targetBuffer,
                    targetOffset,
                    offsetWritePosition - offsetReadPosition);
            }
        }
    }