org.iq80.leveldb.util

Class DynamicSliceOutput

java.lang.Object

java.io.OutputStream

org.iq80.leveldb.util.SliceOutput

org.iq80.leveldb.util.DynamicSliceOutput

All Implemented Interfaces:

Closeable, DataOutput, Flushable, AutoCloseable

public class DynamicSliceOutput
extends SliceOutput

Constructor Summary

Constructors

Constructor and Description
DynamicSliceOutput(int estimatedSize)

Method Summary

Modifier and Type	Method and Description
boolean	isWritable() Returns true if and only if (this.capacity - this.writerIndex) is greater than 0.
void	reset() Resets this stream to the initial position.
int	size() Returns the writerIndex of this buffer.
Slice	slice() Returns a slice of this buffer's readable bytes.
ByteBuffer	toByteBuffer() Converts this buffer's readable bytes into a NIO buffer.
String	toString()
String	toString(Charset charset) Decodes this buffer's readable bytes into a string with the specified character set name.
int	writableBytes() Returns the number of writable bytes which is equal to (this.capacity - this.writerIndex).
void	writeByte(int value) Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer.
void	writeBytes(byte[] source) 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 (= source.length).
void	writeBytes(byte[] source, int sourceIndex, 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 source) 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.
int	writeBytes(FileChannel in, int position, int 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.
int	writeBytes(ScatteringByteChannel in, int length) Transfers the content of the specified channel to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes.
void	writeBytes(Slice source) Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer becomes unreadable, and increases the writerIndex by the number of the transferred bytes.
void	writeBytes(SliceInput source, 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).
void	writeBytes(Slice source, int sourceIndex, 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).
void	writeInt(int value) Sets the specified 32-bit integer at the current writerIndex and increases the writerIndex by 4 in this buffer.
void	writeLong(long value) Sets the specified 64-bit long integer at the current writerIndex and increases the writerIndex by 8 in this buffer.
void	writeShort(int value) Sets the specified 16-bit short integer at the current writerIndex and increases the writerIndex by 2 in this buffer.
void	writeZero(int length) Fills this buffer with NUL (0x00) starting at the current writerIndex and increases the writerIndex by the specified length.

Methods inherited from class org.iq80.leveldb.util.SliceOutput

write, write, write, writeBoolean, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeUTF

Methods inherited from class java.io.OutputStream

close, flush

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DynamicSliceOutput

public DynamicSliceOutput(int estimatedSize)

Method Detail

reset

public void reset()

Description copied from class: SliceOutput

Resets this stream to the initial position.

Specified by:

reset in class SliceOutput

size

public int size()

Description copied from class: SliceOutput

Returns the writerIndex of this buffer.

Specified by:

size in class SliceOutput

isWritable

public boolean isWritable()

Description copied from class: SliceOutput

Returns true if and only if (this.capacity - this.writerIndex) is greater than 0.

Specified by:

isWritable in class SliceOutput

writableBytes

public int writableBytes()

Description copied from class: SliceOutput

Returns the number of writable bytes which is equal to (this.capacity - this.writerIndex).

Specified by:

writableBytes in class SliceOutput

writeByte

public void writeByte(int value)

Description copied from class: SliceOutput

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 DataOutput

Specified by:

writeByte in class SliceOutput

writeShort

public void writeShort(int value)

Description copied from class: SliceOutput

Sets the specified 16-bit short integer at the current writerIndex and increases the writerIndex by 2 in this buffer. The 16 high-order bits of the specified value are ignored.

Specified by:

writeShort in interface DataOutput

Specified by:

writeShort in class SliceOutput

writeInt

public void writeInt(int value)

Description copied from class: SliceOutput

Sets the specified 32-bit integer at the current writerIndex and increases the writerIndex by 4 in this buffer.

Specified by:

writeInt in interface DataOutput

Specified by:

writeInt in class SliceOutput

writeLong

public void writeLong(long value)

Description copied from class: SliceOutput

Sets the specified 64-bit long integer at the current writerIndex and increases the writerIndex by 8 in this buffer.

Specified by:

writeLong in interface DataOutput

Specified by:

writeLong in class SliceOutput

writeBytes

public void writeBytes(byte[] source)

Description copied from class: SliceOutput

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 (= source.length).

Specified by:

writeBytes in class SliceOutput

writeBytes

public void writeBytes(byte[] source,
                       int sourceIndex,
                       int length)

Description copied from class: SliceOutput

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 class SliceOutput

sourceIndex - the first index of the source

length - the number of bytes to transfer

writeBytes

public void writeBytes(Slice source)

Description copied from class: SliceOutput

Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer becomes unreadable, and increases the writerIndex by the number of the transferred bytes. This method is basically same with SliceOutput.writeBytes(Slice, int, int), except that this method increases the readerIndex of the source buffer by the number of the transferred bytes while SliceOutput.writeBytes(Slice, int, int) does not.

Specified by:

writeBytes in class SliceOutput

writeBytes

public void writeBytes(SliceInput source,
                       int length)

Description copied from class: SliceOutput

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). This method is basically same with SliceOutput.writeBytes(Slice, int, int), except that this method increases the readerIndex of the source buffer by the number of the transferred bytes (= length) while SliceOutput.writeBytes(Slice, int, int) does not.

Specified by:

writeBytes in class SliceOutput

length - the number of bytes to transfer

writeBytes

public void writeBytes(Slice source,
                       int sourceIndex,
                       int length)

Description copied from class: SliceOutput

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 class SliceOutput

sourceIndex - the first index of the source

length - the number of bytes to transfer

writeBytes

public void writeBytes(ByteBuffer source)

Description copied from class: SliceOutput

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 class SliceOutput

writeBytes

public int writeBytes(InputStream in,
                      int length)
               throws IOException

Description copied from class: SliceOutput

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 class SliceOutput

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

writeBytes

public int writeBytes(ScatteringByteChannel in,
                      int length)
               throws IOException

Description copied from class: SliceOutput

Transfers the content of the specified channel to this buffer starting at the current writerIndex and increases the writerIndex by the number of the transferred bytes.

Specified by:

writeBytes in class SliceOutput

length - the maximum number of bytes to transfer

Returns:

the actual number of bytes read in from the specified channel

Throws:

IOException - if the specified channel threw an exception during I/O

writeBytes

public int writeBytes(FileChannel in,
                      int position,
                      int length)
               throws IOException

Specified by:

writeBytes in class SliceOutput

Throws:

IOException

writeZero

public void writeZero(int length)

Description copied from class: SliceOutput

Fills this buffer with NUL (0x00) starting at the current writerIndex and increases the writerIndex by the specified length.

Specified by:

writeZero in class SliceOutput

Parameters:

length - the number of NULs to write to the buffer

slice

public Slice slice()

Description copied from class: SliceOutput

Returns a slice of this buffer's readable bytes. Modifying the content of the returned buffer or this buffer affects each other's content while they maintain separate indexes and marks. This method is identical to buf.slice(buf.readerIndex(), buf.readableBytes()). This method does not modify readerIndex or writerIndex of this buffer.

Specified by:

slice in class SliceOutput

toByteBuffer

public ByteBuffer toByteBuffer()

Description copied from class: SliceOutput

Converts this buffer's readable bytes 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 is identical to buf.toByteBuffer(buf.readerIndex(), buf.readableBytes()). This method does not modify readerIndex or writerIndex of this buffer.

Specified by:

toByteBuffer in class SliceOutput

toString

public String toString()

Overrides:

toString in class Object

toString

public String toString(Charset charset)

Description copied from class: SliceOutput

Decodes this buffer's readable bytes into a string with the specified character set name. This method is identical to buf.toString(buf.readerIndex(), buf.readableBytes(), charsetName). This method does not modify readerIndex or writerIndex of this buffer.

Specified by:

toString in class SliceOutput