Examples of org.glassfish.grizzly.Buffer

org.glassfish.grizzly.Buffer
JDK {@link ByteBuffer} was taken as base for GrizzlyBuffer interface, but Buffer has several extensions: it's possible to prepend some data to a Buffer and release Buffer, when it's not required any more. @author Alexey Stashok


        if (memoryManager instanceof WrapperAware) {
            return ((WrapperAware) memoryManager).wrap(array, offset, length);
        }


        final Buffer buffer = memoryManager.allocate(length);
        buffer.put(array, offset, length);
        buffer.flip();
        return buffer;
    }

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        final int srcLength = limit - position;
        if (srcLength == 0) { // make sure clone doesn't return EMPTY_BUFFER 
            return wrap(getDefaultMemoryManager(), EMPTY_BYTE_BUFFER);
        }
        
        final Buffer clone = getDefaultMemoryManager().allocate(srcLength);
        clone.put(srcBuffer, position, srcLength);


        return clone.flip();
    }

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    private static void copyBufferChunk(DataChunk source, DataChunk dest) {
        final BufferChunk bc = source.getBufferChunk();
        int l = bc.getLength();
        byte[] bytes = new byte[l];
        final Buffer b = bc.getBuffer();
        int oldPos = b.position();
        try {
            b.position(bc.getStart());
            bc.getBuffer().get(bytes, 0, l);
            dest.setBytes(bytes);
        } finally {
            b.position(oldPos);
        }
    }

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        if (newBuffer == this) {
            throw new IllegalArgumentException("CompositeBuffer can not append itself");
        }
        
        for (int i = 0; i < buffersSize; i++) {
            final Buffer b = buffers[i];
            if (b == oldBuffer) {
                buffers[i] = newBuffer;
                calcCapacity();
                limit = capacity;


                if (position > limit) {
                    position = limit;
                }


                resetLastLocation();


                return true;
            } else if (b.isComposite()) {
                if (((CompositeBuffer) b).replace(oldBuffer, newBuffer)) {
                    break;
                }
            }
        }

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        final int splitBufferIdx = lastSegmentIndex;


        final int splitBufferPos = toActiveBufferPos(splitPosition);


        final BuffersBuffer slice2Buffer = BuffersBuffer.create(memoryManager);
        final Buffer splitBuffer = activeBuffer;


        int newSize = splitBufferIdx + 1;


        if (splitBufferPos == 0) {
            slice2Buffer.append(splitBuffer);
            buffers[splitBufferIdx] = null;
            newSize = splitBufferIdx;
        } else if (splitBufferPos < splitBuffer.limit()) {
            final Buffer splitBuffer2 = splitBuffer.split(splitBufferPos);
            slice2Buffer.append(splitBuffer2);
        }


        for (int i = splitBufferIdx + 1; i < buffersSize; i++) {
            slice2Buffer.append(buffers[i]);

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        int shift = 0;


        // Shift buffers left to position
        for (int i = 0; i < posBufferIndex; i++) {
            final Buffer buffer = buffers[i];
            shift += buffer.remaining();


            if (allowInternalBuffersDispose) {
                buffer.tryDispose();
            }
        }


        // Shift the position buffer
        final Buffer posBuffer = buffers[posBufferIndex];        
        final int diff = posBufferPosition - posBuffer.position();
        if (diff > 0) {
            posBuffer.position(posBufferPosition);
            posBuffer.shrink();
            shift += diff;
        }       
        
        setPosLim(position - shift, limit - shift);
        if (mark > position) mark = -1;


        for (int i = 0; i < rightTrim; i++) {
            final int idx = buffersSize - i - 1;
            final Buffer buffer = buffers[idx];
            buffers[idx] = null;


            if (allowInternalBuffersDispose) {
                buffer.tryDispose();
            }
        }


        buffersSize -= (posBufferIndex + rightTrim);

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    protected int removeRightBuffers(int startIndex) {
        int removedBytes = 0;


        for(int i=startIndex; i<buffersSize; i++) {
            final Buffer buffer = buffers[i];
            buffers[i] = null;
            removedBytes += buffer.remaining();


            if (allowInternalBuffersDispose) {
                buffer.tryDispose();
            }
        }


        buffersSize = startIndex;

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            return buffers[posBufferIndex].slice(
                    posBufferPosition, limitBufferPosition);
        } else {
            final Buffer[] newList = new Buffer[limitBufferIndex - posBufferIndex + 1];


            final Buffer posBuffer = buffers[posBufferIndex];
            newList[0] = posBuffer.slice(posBufferPosition, posBuffer.limit());


            int index = 1;
            for (int i = posBufferIndex + 1; i < limitBufferIndex; i++) {
                newList[index++] = buffers[i].slice();
            }


            final Buffer limitBuffer = buffers[limitBufferIndex];
            newList[index] = limitBuffer.slice(limitBuffer.position(),
                    limitBufferPosition);


            return BuffersBuffer.create(memoryManager, newList, newList.length,
                    isReadOnly);
        }

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        if (isBroken(element)) {
            return element;
        }
        
        final Buffer content2 = element.getContent();
        if (content2 != null && content2.hasRemaining()) {
            content = Buffers.appendBuffers(null, content, content2);
        }


        if (element.isLast()) {
            element.setContent(content);

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     */
    public static void decode(final BufferChunk srcBufferChunk,
            final ByteChunk dstByteChunk,
            final boolean allowEncodedSlash) throws CharConversionException {


        final Buffer srcBuffer = srcBufferChunk.getBuffer();
        final int srcStart = srcBufferChunk.getStart();
        final int srcEnd = srcBufferChunk.getEnd();


        final byte[] dstBuffer = dstByteChunk.getBuffer();
        int idx = dstByteChunk.getStart();
        
        for (int j = srcStart; j < srcEnd; j++, idx++) {
            final byte b = srcBuffer.get(j);


            if (b == '+') {
                dstBuffer[idx] = (byte) ' ';
            } else if (b != '%') {
                dstBuffer[idx] = b;
            } else {
                // read next 2 digits
                if (j + 2 >= srcEnd) {
                    throw new IllegalStateException("Unexpected termination");
                }
                byte b1 = srcBuffer.get(j + 1);
                byte b2 = srcBuffer.get(j + 2);
                
                if (!HexUtils.isHexDigit(b1) || !HexUtils.isHexDigit(b2)) {
                    throw new IllegalArgumentException(
                            "URLDecoder: Illegal hex characters in escape (%) pattern - %"
                                    + (char) b1 + "" + (char) b2);

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