public void read()

in src/main/java/org/apache/commons/io/input/buffer/CircularByteBuffer.java [242:267]

• 26 lines of code
• 7 McCabe index (conditional complexity)

    public void read(final byte[] targetBuffer, final int targetOffset, final int length) {
        Objects.requireNonNull(targetBuffer, "targetBuffer");
        if (targetOffset < 0 || targetOffset >= targetBuffer.length) {
            throw new IllegalArgumentException("Illegal offset: " + targetOffset);
        }
        if (length < 0 || length > buffer.length) {
            throw new IllegalArgumentException("Illegal length: " + length);
        }
        if (targetOffset + length > targetBuffer.length) {
            throw new IllegalArgumentException("The supplied byte array contains only "
                    + targetBuffer.length + " bytes, but offset, and length would require "
                    + (targetOffset + length - 1));
        }
        if (currentNumberOfBytes < length) {
            throw new IllegalStateException("Currently, there are only " + currentNumberOfBytes
                    + "in the buffer, not " + length);
        }
        int offset = targetOffset;
        for (int i = 0; i < length; i++) {
            targetBuffer[offset++] = buffer[startOffset];
            --currentNumberOfBytes;
            if (++startOffset == buffer.length) {
                startOffset = 0;
            }
        }
    }