@Override
public List<ByteBuf> decompose(int offset, int length) {
if (length == 0) {
return Collections.emptyList();
}
if (offset + length > capacity()) {
throw new IndexOutOfBoundsException(
"Too many bytes to decompose - Need "
+ (offset + length)
+ ", capacity is "
+ capacity());
}
int componentId = toComponentIndex(offset);
List<ByteBuf> slice = new ArrayList<ByteBuf>(components.size());
// The first component
Component firstC = components.get(componentId);
ByteBuf first = firstC.buf.duplicate();
first.readerIndex(offset - firstC.offset);
ByteBuf buf = first;
int bytesToSlice = length;
do {
int readableBytes = buf.readableBytes();
if (bytesToSlice <= readableBytes) {
// Last component
buf.writerIndex(buf.readerIndex() + bytesToSlice);
slice.add(buf);
break;
} else {
// Not the last component
slice.add(buf);
bytesToSlice -= readableBytes;
componentId++;
// Fetch the next component.
buf = components.get(componentId).buf.duplicate();
}
} while (bytesToSlice > 0);
// Slice all components because only readable bytes are interesting.
for (int i = 0; i < slice.size(); i++) {
slice.set(i, slice.get(i).slice());
}
return slice;
}
public OFMessage readFrom(ByteBuf bb) throws OFParseError {
if(!bb.isReadable())
return null;
short wireVersion = U8.f(bb.getByte(bb.readerIndex()));
OFFactory factory;
switch (wireVersion) {
//:: for v in versions:
case ${v.int_version}:
@Override
public void addComponent(int cIndex, ByteBuf buffer) {
checkComponentIndex(cIndex);
if (buffer == null) {
throw new NullPointerException("buffer");
}
if (buffer instanceof Iterable) {
@SuppressWarnings("unchecked")
Iterable<ByteBuf> composite = (Iterable<ByteBuf>) buffer;
addComponents(cIndex, composite);
return;
}
int readableBytes = buffer.readableBytes();
if (readableBytes == 0) {
return;
}
// Consolidate if the number of components will exceed the allowed maximum by the current
// operation.
final int numComponents = components.size();
if (numComponents >= maxNumComponents) {
final int capacity = components.get(numComponents - 1).endOffset + readableBytes;
ByteBuf consolidated = buffer.unsafe().newBuffer(capacity);
for (int i = 0; i < numComponents; i++) {
ByteBuf b = components.get(i).buf;
consolidated.writeBytes(b);
b.unsafe().release();
}
consolidated.writeBytes(buffer, buffer.readerIndex(), readableBytes);
Component c = new Component(consolidated);
c.endOffset = c.length;
components.clear();
components.add(c);
return;
}
// No need to consolidate - just add a component to the list.
Component c = new Component(buffer.order(ByteOrder.BIG_ENDIAN).slice());
if (cIndex == components.size()) {
components.add(c);
if (cIndex == 0) {
c.endOffset = readableBytes;
} else {
Component prev = components.get(cIndex - 1);
c.offset = prev.endOffset;
c.endOffset = c.offset + readableBytes;
}
} else {
components.add(cIndex, c);
updateComponentOffsets(cIndex);
}
}
/**
* Creates a new buffer whose content is a copy of the specified {@code buffer}'s readable bytes.
* The new buffer's {@code readerIndex} and {@code writerIndex} are {@code 0} and {@code
* buffer.readableBytes} respectively.
*/
public static ByteBuf copiedBuffer(ByteBuf buffer) {
int readable = buffer.readableBytes();
if (readable > 0) {
ByteBuf copy = buffer(readable);
copy.writeBytes(buffer, buffer.readerIndex(), readable);
return copy;
} else {
return EMPTY_BUFFER;
}
}
@Test
public void shouldForwardReadCallsBlindly() throws Exception {
ByteBuf buf = createStrictMock(ByteBuf.class);
expect(buf.order()).andReturn(BIG_ENDIAN).anyTimes();
expect(buf.maxCapacity()).andReturn(65536).anyTimes();
expect(buf.readerIndex()).andReturn(0).anyTimes();
expect(buf.writerIndex()).andReturn(0).anyTimes();
expect(buf.capacity()).andReturn(0).anyTimes();
expect(buf.getBytes(1, (GatheringByteChannel) null, 2)).andReturn(3);
expect(buf.getBytes(4, (OutputStream) null, 5)).andReturn(buf);
expect(buf.getBytes(6, (byte[]) null, 7, 8)).andReturn(buf);
expect(buf.getBytes(9, (ByteBuf) null, 10, 11)).andReturn(buf);
expect(buf.getBytes(12, (ByteBuffer) null)).andReturn(buf);
expect(buf.getByte(13)).andReturn(Byte.valueOf((byte) 14));
expect(buf.getShort(15)).andReturn(Short.valueOf((short) 16));
expect(buf.getUnsignedMedium(17)).andReturn(18);
expect(buf.getInt(19)).andReturn(20);
expect(buf.getLong(21)).andReturn(22L);
ByteBuffer bb = ByteBuffer.allocate(100);
expect(buf.nioBuffer(23, 24)).andReturn(bb);
expect(buf.capacity()).andReturn(27);
replay(buf);
ByteBuf roBuf = unmodifiableBuffer(buf);
assertEquals(3, roBuf.getBytes(1, (GatheringByteChannel) null, 2));
roBuf.getBytes(4, (OutputStream) null, 5);
roBuf.getBytes(6, (byte[]) null, 7, 8);
roBuf.getBytes(9, (ByteBuf) null, 10, 11);
roBuf.getBytes(12, (ByteBuffer) null);
assertEquals((byte) 14, roBuf.getByte(13));
assertEquals((short) 16, roBuf.getShort(15));
assertEquals(18, roBuf.getUnsignedMedium(17));
assertEquals(20, roBuf.getInt(19));
assertEquals(22L, roBuf.getLong(21));
ByteBuffer roBB = roBuf.nioBuffer(23, 24);
assertEquals(100, roBB.capacity());
assertTrue(roBB.isReadOnly());
assertEquals(27, roBuf.capacity());
verify(buf);
}
/**
* Creates a new buffer whose content is a merged copy of the specified {@code buffers}' readable
* bytes. The new buffer's {@code readerIndex} and {@code writerIndex} are {@code 0} and the sum
* of all buffers' {@code readableBytes} respectively.
*
* @throws IllegalArgumentException if the specified buffers' endianness are different from each
* other
*/
public static ByteBuf copiedBuffer(ByteBuf... buffers) {
switch (buffers.length) {
case 0:
return EMPTY_BUFFER;
case 1:
return copiedBuffer(buffers[0]);
}
// Merge the specified buffers into one buffer.
ByteOrder order = null;
int length = 0;
for (ByteBuf b : buffers) {
int bLen = b.readableBytes();
if (bLen <= 0) {
continue;
}
if (Integer.MAX_VALUE - length < bLen) {
throw new IllegalArgumentException("The total length of the specified buffers is too big.");
}
length += bLen;
if (order != null) {
if (!order.equals(b.order())) {
throw new IllegalArgumentException("inconsistent byte order");
}
} else {
order = b.order();
}
}
if (length == 0) {
return EMPTY_BUFFER;
}
byte[] mergedArray = new byte[length];
for (int i = 0, j = 0; i < buffers.length; i++) {
ByteBuf b = buffers[i];
int bLen = b.readableBytes();
b.getBytes(b.readerIndex(), mergedArray, j, bLen);
j += bLen;
}
return wrappedBuffer(mergedArray).order(order);
}
@Override
public ByteBuf readerIndex(int readerIndex) {
buf.readerIndex(readerIndex);
return this;
}
@Override
public int readerIndex() {
return buf.readerIndex();
}
@Override
public void addComponents(int cIndex, ByteBuf... buffers) {
checkComponentIndex(cIndex);
if (buffers == null) {
throw new NullPointerException("buffers");
}
ByteBuf lastBuf = null;
int cnt = 0;
int readableBytes = 0;
for (ByteBuf b : buffers) {
if (b == null) {
break;
}
lastBuf = b;
cnt++;
readableBytes += b.readableBytes();
}
if (readableBytes == 0) {
return;
}
// Consolidate if the number of components will exceed the maximum by this operation.
final int numComponents = components.size();
if (numComponents + cnt > maxNumComponents) {
final ByteBuf consolidated;
if (numComponents != 0) {
final int capacity = components.get(numComponents - 1).endOffset + readableBytes;
consolidated = lastBuf.unsafe().newBuffer(capacity);
for (int i = 0; i < cIndex; i++) {
ByteBuf b = components.get(i).buf;
consolidated.writeBytes(b);
b.unsafe().release();
}
for (ByteBuf b : buffers) {
if (b == null) {
break;
}
consolidated.writeBytes(b, b.readerIndex(), b.readableBytes());
}
for (int i = cIndex; i < numComponents; i++) {
ByteBuf b = components.get(i).buf;
consolidated.writeBytes(b);
b.unsafe().release();
}
} else {
consolidated = lastBuf.unsafe().newBuffer(readableBytes);
for (ByteBuf b : buffers) {
if (b == null) {
break;
}
consolidated.writeBytes(b, b.readerIndex(), b.readableBytes());
}
}
Component c = new Component(consolidated);
c.endOffset = c.length;
components.clear();
components.add(c);
updateComponentOffsets(0);
return;
}
// No need for consolidation
for (ByteBuf b : buffers) {
if (b == null) {
break;
}
if (b.readable()) {
addComponent(cIndex++, b);
}
}
}
@Test
public void testDiscardReadBytes3() {
ByteBuf a, b;
a = wrappedBuffer(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}).order(order);
b =
freeLater(
wrappedBuffer(
wrappedBuffer(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, 0, 5).order(order),
wrappedBuffer(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, 5, 5).order(order)));
a.skipBytes(6);
a.markReaderIndex();
b.skipBytes(6);
b.markReaderIndex();
assertEquals(a.readerIndex(), b.readerIndex());
a.readerIndex(a.readerIndex() - 1);
b.readerIndex(b.readerIndex() - 1);
assertEquals(a.readerIndex(), b.readerIndex());
a.writerIndex(a.writerIndex() - 1);
a.markWriterIndex();
b.writerIndex(b.writerIndex() - 1);
b.markWriterIndex();
assertEquals(a.writerIndex(), b.writerIndex());
a.writerIndex(a.writerIndex() + 1);
b.writerIndex(b.writerIndex() + 1);
assertEquals(a.writerIndex(), b.writerIndex());
assertTrue(ByteBufUtil.equals(a, b));
// now discard
a.discardReadBytes();
b.discardReadBytes();
assertEquals(a.readerIndex(), b.readerIndex());
assertEquals(a.writerIndex(), b.writerIndex());
assertTrue(ByteBufUtil.equals(a, b));
a.resetReaderIndex();
b.resetReaderIndex();
assertEquals(a.readerIndex(), b.readerIndex());
a.resetWriterIndex();
b.resetWriterIndex();
assertEquals(a.writerIndex(), b.writerIndex());
assertTrue(ByteBufUtil.equals(a, b));
}