C# Class Lucene.Net.Store.DataInput

Abstract base class for performing read operations of Lucene's low-level data types.

{@code DataInput} may only be used from one thread, because it is not thread safe (it keeps internal state like file position). To allow multithreaded use, every {@code DataInput} instance must be cloned before used in another thread. Subclasses must therefore implement #clone(), returning a new {@code DataInput} which operates on the same underlying resource, but positioned independently.

Inheritance: ICloneable

ファイルを表示 Open project: apache/lucenenet Class Usage Examples

Public Methods

Method	Description
Clone ( ) : object	Returns a clone of this stream. Clones of a stream access the same data, and are positioned at the same point as the stream they were cloned from. Expert: Subclasses must ensure that clones may be positioned at different points in the input from each other and from the stream they were cloned from.
ReadByte ( ) : byte	Reads and returns a single byte.
ReadBytes ( byte b, int offset, int len ) : void	Reads a specified number of bytes into an array at the specified offset.
ReadBytes ( byte b, int offset, int len, bool useBuffer ) : void	Reads a specified number of bytes into an array at the specified offset with control over whether the read should be buffered (callers who have their own buffer should pass in "false" for useBuffer). Currently only BufferedIndexInput respects this parameter.
ReadInt ( ) : int	Reads four bytes and returns an int.
ReadLong ( ) : long	Reads eight bytes and returns a long.
ReadShort ( ) : short	Reads two bytes and returns a short. LUCENENET NOTE: Important - always cast to ushort (System.UInt16) before using to ensure the value is positive!
ReadString ( ) : string	Reads a string.
ReadStringSet ( ) : ISet	Reads a Set<String> previously written with DataOutput#writeStringSet(Set).
ReadStringStringMap ( ) : string>.IDictionary	Reads a Map<String,String> previously written with DataOutput#writeStringStringMap(Map).
ReadVInt ( ) : int	Reads an int stored in variable-length format. Reads between one and five bytes. Smaller values take fewer bytes. Negative numbers are not supported. The format is described further in DataOutput#writeVInt(int).
ReadVLong ( ) : long	Reads a long stored in variable-length format. Reads between one and nine bytes. Smaller values take fewer bytes. Negative numbers are not supported. The format is described further in DataOutput#writeVInt(int).
SkipBytes ( long numBytes ) : void	Skip over `numBytes` bytes. The contract on this method is that it should have the same behavior as reading the same number of bytes into a buffer and discarding its content. Negative values of `numBytes` are not supported.

Method Details

Clone() public method

Returns a clone of this stream.

Clones of a stream access the same data, and are positioned at the same point as the stream they were cloned from.

Expert: Subclasses must ensure that clones may be positioned at different points in the input from each other and from the stream they were cloned from.

public Clone ( ) : object
return	object

ReadByte() public abstract method

Reads and returns a single byte.

public abstract ReadByte ( ) : byte
return	byte

ReadBytes() public abstract method

Reads a specified number of bytes into an array at the specified offset.

public abstract ReadBytes ( byte b, int offset, int len ) : void
b	byte	the array to read bytes into
offset	int	the offset in the array to start storing bytes
len	int	the number of bytes to read
return	void

ReadBytes() public method

Reads a specified number of bytes into an array at the specified offset with control over whether the read should be buffered (callers who have their own buffer should pass in "false" for useBuffer). Currently only BufferedIndexInput respects this parameter.

public ReadBytes ( byte b, int offset, int len, bool useBuffer ) : void
b	byte	the array to read bytes into
offset	int	the offset in the array to start storing bytes
len	int	the number of bytes to read
useBuffer	bool	set to false if the caller will handle /// buffering.
return	void

ReadInt() public method

Reads four bytes and returns an int.

public ReadInt ( ) : int
return	int

ReadLong() public method

Reads eight bytes and returns a long.

public ReadLong ( ) : long
return	long

ReadShort() public method

Reads two bytes and returns a short. LUCENENET NOTE: Important - always cast to ushort (System.UInt16) before using to ensure the value is positive!

public ReadShort ( ) : short
return	short

ReadString() public method

Reads a string.

public ReadString ( ) : string
return	string

ReadStringSet() public method

Reads a Set<String> previously written with DataOutput#writeStringSet(Set).

public ReadStringSet ( ) : ISet
return	ISet

ReadStringStringMap() public method

Reads a Map<String,String> previously written with DataOutput#writeStringStringMap(Map).

public ReadStringStringMap ( ) : string>.IDictionary
return	string>.IDictionary

ReadVInt() public method

Reads an int stored in variable-length format. Reads between one and five bytes. Smaller values take fewer bytes. Negative numbers are not supported.

The format is described further in DataOutput#writeVInt(int).

public ReadVInt ( ) : int
return	int

ReadVLong() public method

Reads a long stored in variable-length format. Reads between one and nine bytes. Smaller values take fewer bytes. Negative numbers are not supported.

The format is described further in DataOutput#writeVInt(int).

public ReadVLong ( ) : long
return	long

SkipBytes() public method

Skip over numBytes bytes. The contract on this method is that it should have the same behavior as reading the same number of bytes into a buffer and discarding its content. Negative values of numBytes are not supported.

public SkipBytes ( long numBytes ) : void
numBytes	long
return	void