com.alibaba.dubbo.remoting.buffer
Class DynamicChannelBuffer

java.lang.Object
  extended by com.alibaba.dubbo.remoting.buffer.AbstractChannelBuffer
      extended by com.alibaba.dubbo.remoting.buffer.DynamicChannelBuffer
All Implemented Interfaces:
ChannelBuffer, Comparable<ChannelBuffer>

public class DynamicChannelBuffer
extends AbstractChannelBuffer

Author:
kimi

Constructor Summary
DynamicChannelBuffer(int estimatedLength)
           
DynamicChannelBuffer(int estimatedLength, ChannelBufferFactory factory)
           
 
Method Summary
 byte[] array()
          Returns the backing byte array of this buffer.
 int arrayOffset()
          Returns the offset of the first byte within the backing byte array of this buffer.
 int capacity()
          Returns the number of bytes (octets) this buffer can contain.
 ChannelBuffer copy(int index, int length)
          Returns a copy of this buffer's sub-region.
 void ensureWritableBytes(int minWritableBytes)
          Makes sure the number of the writable bytes is equal to or greater than the specified value.
 ChannelBufferFactory factory()
          Returns the factory which creates a ChannelBuffer whose type and default ByteOrder are same with this buffer.
 byte getByte(int index)
          Gets a byte at the specified absolute index in this buffer.
 void getBytes(int index, byte[] dst, int dstIndex, int length)
          Transfers this buffer's data to the specified destination starting at the specified absolute index.
 void getBytes(int index, ByteBuffer dst)
          Transfers this buffer's data to the specified destination starting at the specified absolute index until the destination's position reaches its limit.
 void getBytes(int index, ChannelBuffer dst, int dstIndex, int length)
          Transfers this buffer's data to the specified destination starting at the specified absolute index.
 void getBytes(int index, OutputStream dst, int length)
          Transfers this buffer's data to the specified stream starting at the specified absolute index.
 boolean hasArray()
          Returns true if and only if this buffer has a backing byte array.
 boolean isDirect()
          Returns true if and only if this buffer is backed by an NIO direct buffer.
 void setByte(int index, int value)
          Sets the specified byte at the specified absolute index in this buffer.
 void setBytes(int index, byte[] src, int srcIndex, int length)
          Transfers the specified source array's data to this buffer starting at the specified absolute index.
 void setBytes(int index, ByteBuffer src)
          Transfers the specified source buffer's data to this buffer starting at the specified absolute index until the source buffer's position reaches its limit.
 void setBytes(int index, ChannelBuffer src, int srcIndex, int length)
          Transfers the specified source buffer's data to this buffer starting at the specified absolute index.
 int setBytes(int index, InputStream src, int length)
          Transfers the content of the specified source stream to this buffer starting at the specified absolute index.
 ByteBuffer toByteBuffer(int index, int length)
          Converts this buffer's sub-region into a NIO buffer.
 void writeByte(int value)
          Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer.
 void writeBytes(byte[] src, int srcIndex, int length)
          Transfers the specified source array's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).
 void writeBytes(ByteBuffer src)
          Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer's position reaches its limit, and increases the writerIndex by the number of the transferred bytes.
 void writeBytes(ChannelBuffer src, int srcIndex, int length)
          Transfers the specified source buffer's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).
 int writeBytes(InputStream in, int length)
          Transfers the content of the specified stream to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes.
 
Methods inherited from class com.alibaba.dubbo.remoting.buffer.AbstractChannelBuffer
clear, compareTo, copy, discardReadBytes, equals, getBytes, getBytes, getBytes, markReaderIndex, markWriterIndex, readable, readableBytes, readByte, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readBytes, readerIndex, readerIndex, resetReaderIndex, resetWriterIndex, setBytes, setBytes, setBytes, setIndex, skipBytes, toByteBuffer, toString, writable, writableBytes, writeBytes, writeBytes, writeBytes, writerIndex, writerIndex
 
Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

DynamicChannelBuffer

public DynamicChannelBuffer(int estimatedLength)

DynamicChannelBuffer

public DynamicChannelBuffer(int estimatedLength,
                            ChannelBufferFactory factory)
Method Detail

ensureWritableBytes

public void ensureWritableBytes(int minWritableBytes)
Description copied from interface: ChannelBuffer
Makes sure the number of the writable bytes is equal to or greater than the specified value. If there is enough writable bytes in this buffer, this method returns with no side effect. Otherwise:

Specified by:
ensureWritableBytes in interface ChannelBuffer
Overrides:
ensureWritableBytes in class AbstractChannelBuffer
Parameters:
minWritableBytes - the expected minimum number of writable bytes

capacity

public int capacity()
Description copied from interface: ChannelBuffer
Returns the number of bytes (octets) this buffer can contain.


copy

public ChannelBuffer copy(int index,
                          int length)
Description copied from interface: ChannelBuffer
Returns a copy of this buffer's sub-region. Modifying the content of the returned buffer or this buffer does not affect each other at all. This method does not modify readerIndex or writerIndex of this buffer.


factory

public ChannelBufferFactory factory()
Description copied from interface: ChannelBuffer
Returns the factory which creates a ChannelBuffer whose type and default ByteOrder are same with this buffer.


getByte

public byte getByte(int index)
Description copied from interface: ChannelBuffer
Gets a byte at the specified absolute index in this buffer. This method does not modify readerIndex or writerIndex of this buffer.


getBytes

public void getBytes(int index,
                     byte[] dst,
                     int dstIndex,
                     int length)
Description copied from interface: ChannelBuffer
Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

dstIndex - the first index of the destination
length - the number of bytes to transfer

getBytes

public void getBytes(int index,
                     ByteBuffer dst)
Description copied from interface: ChannelBuffer
Transfers this buffer's data to the specified destination starting at the specified absolute index until the destination's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer while the destination's position will be increased.


getBytes

public void getBytes(int index,
                     ChannelBuffer dst,
                     int dstIndex,
                     int length)
Description copied from interface: ChannelBuffer
Transfers this buffer's data to the specified destination starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.

dstIndex - the first index of the destination
length - the number of bytes to transfer

getBytes

public void getBytes(int index,
                     OutputStream dst,
                     int length)
              throws IOException
Description copied from interface: ChannelBuffer
Transfers this buffer's data to the specified stream starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

length - the number of bytes to transfer
Throws:
IOException - if the specified stream threw an exception during I/O

isDirect

public boolean isDirect()
Description copied from interface: ChannelBuffer
Returns true if and only if this buffer is backed by an NIO direct buffer.


setByte

public void setByte(int index,
                    int value)
Description copied from interface: ChannelBuffer
Sets the specified byte at the specified absolute index in this buffer. The 24 high-order bits of the specified value are ignored. This method does not modify readerIndex or writerIndex of this buffer.


setBytes

public void setBytes(int index,
                     byte[] src,
                     int srcIndex,
                     int length)
Description copied from interface: ChannelBuffer
Transfers the specified source array's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.


setBytes

public void setBytes(int index,
                     ByteBuffer src)
Description copied from interface: ChannelBuffer
Transfers the specified source buffer's data to this buffer starting at the specified absolute index until the source buffer's position reaches its limit. This method does not modify readerIndex or writerIndex of this buffer.


setBytes

public void setBytes(int index,
                     ChannelBuffer src,
                     int srcIndex,
                     int length)
Description copied from interface: ChannelBuffer
Transfers the specified source buffer's data to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of both the source (i.e. this) and the destination.

srcIndex - the first index of the source
length - the number of bytes to transfer

setBytes

public int setBytes(int index,
                    InputStream src,
                    int length)
             throws IOException
Description copied from interface: ChannelBuffer
Transfers the content of the specified source stream to this buffer starting at the specified absolute index. This method does not modify readerIndex or writerIndex of this buffer.

length - the number of bytes to transfer
Returns:
the actual number of bytes read in from the specified channel. -1 if the specified channel is closed.
Throws:
IOException - if the specified stream threw an exception during I/O

toByteBuffer

public ByteBuffer toByteBuffer(int index,
                               int length)
Description copied from interface: ChannelBuffer
Converts this buffer's sub-region into a NIO buffer. The returned buffer might or might not share the content with this buffer, while they have separate indexes and marks. This method does not modify readerIndex or writerIndex of this buffer.


writeByte

public void writeByte(int value)
Description copied from interface: ChannelBuffer
Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer. The 24 high-order bits of the specified value are ignored.

Specified by:
writeByte in interface ChannelBuffer
Overrides:
writeByte in class AbstractChannelBuffer

writeBytes

public void writeBytes(byte[] src,
                       int srcIndex,
                       int length)
Description copied from interface: ChannelBuffer
Transfers the specified source array's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).

Specified by:
writeBytes in interface ChannelBuffer
Overrides:
writeBytes in class AbstractChannelBuffer
srcIndex - the first index of the source
length - the number of bytes to transfer

writeBytes

public void writeBytes(ChannelBuffer src,
                       int srcIndex,
                       int length)
Description copied from interface: ChannelBuffer
Transfers the specified source buffer's data to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes (= length).

Specified by:
writeBytes in interface ChannelBuffer
Overrides:
writeBytes in class AbstractChannelBuffer
srcIndex - the first index of the source
length - the number of bytes to transfer

writeBytes

public void writeBytes(ByteBuffer src)
Description copied from interface: ChannelBuffer
Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer's position reaches its limit, and increases the writerIndex by the number of the transferred bytes.

Specified by:
writeBytes in interface ChannelBuffer
Overrides:
writeBytes in class AbstractChannelBuffer

writeBytes

public int writeBytes(InputStream in,
                      int length)
               throws IOException
Description copied from interface: ChannelBuffer
Transfers the content of the specified stream to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes.

Specified by:
writeBytes in interface ChannelBuffer
Overrides:
writeBytes in class AbstractChannelBuffer
length - the number of bytes to transfer
Returns:
the actual number of bytes read in from the specified stream
Throws:
IOException - if the specified stream threw an exception during I/O

array

public byte[] array()
Description copied from interface: ChannelBuffer
Returns the backing byte array of this buffer.


hasArray

public boolean hasArray()
Description copied from interface: ChannelBuffer
Returns true if and only if this buffer has a backing byte array. If this method returns true, you can safely call ChannelBuffer.array() and ChannelBuffer.arrayOffset().


arrayOffset

public int arrayOffset()
Description copied from interface: ChannelBuffer
Returns the offset of the first byte within the backing byte array of this buffer.



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