Package org.apache.lucene.store

Class BufferedChecksumIndexInput

java.lang.Object

org.apache.lucene.store.DataInput

org.apache.lucene.store.IndexInput

org.apache.lucene.store.ChecksumIndexInput

org.apache.lucene.store.BufferedChecksumIndexInput

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Cloneable

public class BufferedChecksumIndexInput
extends ChecksumIndexInput

Simple implementation of ChecksumIndexInput that wraps another input and delegates calls.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.util.zip.Checksum	digest
(package private) IndexInput	main

Constructor Summary

Constructors

Constructor	Description
BufferedChecksumIndexInput(IndexInput main)	Creates a new BufferedChecksumIndexInput

Method Summary

Modifier and Type	Method	Description
IndexInput	clone()	Returns a clone of this stream.
void	close()	Closes the stream to further operations.
long	getChecksum()	Returns the current checksum value
long	getFilePointer()	Returns the current position in this file, where the next read will occur.
long	length()	The number of bytes in the file.
byte	readByte()	Reads and returns a single byte.
void	readBytes(byte[] b, int offset, int len)	Reads a specified number of bytes into an array at the specified offset.
IndexInput	slice(java.lang.String sliceDescription, long offset, long length)	Creates a slice of this index input, with the given description, offset, and length.

Methods inherited from class org.apache.lucene.store.ChecksumIndexInput

seek

Methods inherited from class org.apache.lucene.store.IndexInput

getFullSliceDescription, randomAccessSlice, toString

Methods inherited from class org.apache.lucene.store.DataInput

readBytes, readInt, readLELongs, readLong, readMapOfStrings, readSetOfStrings, readShort, readString, readVInt, readVLong, readZInt, readZLong, skipBytes

Methods inherited from class java.lang.Object

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

Field Detail

main

final IndexInput main

digest

final java.util.zip.Checksum digest

Constructor Detail

BufferedChecksumIndexInput

public BufferedChecksumIndexInput(IndexInput main)

Creates a new BufferedChecksumIndexInput

Method Detail

readByte

public byte readByte()
              throws java.io.IOException

Description copied from class: DataInput

Reads and returns a single byte.

Specified by:

readByte in class DataInput

Throws:

java.io.IOException

See Also:

DataOutput.writeByte(byte)

readBytes

public void readBytes(byte[] b,
                      int offset,
                      int len)
               throws java.io.IOException

Description copied from class: DataInput

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

Specified by:

readBytes in class DataInput

Parameters:

b - the array to read bytes into

offset - the offset in the array to start storing bytes

len - the number of bytes to read

Throws:

java.io.IOException

See Also:

DataOutput.writeBytes(byte[],int)

getChecksum

public long getChecksum()

Description copied from class: ChecksumIndexInput

Returns the current checksum value

Specified by:

getChecksum in class ChecksumIndexInput

close

public void close()
           throws java.io.IOException

Description copied from class: IndexInput

Closes the stream to further operations.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Specified by:

close in class IndexInput

Throws:

java.io.IOException

getFilePointer

public long getFilePointer()

Description copied from class: IndexInput

Returns the current position in this file, where the next read will occur.

Specified by:

getFilePointer in class IndexInput

See Also:

IndexInput.seek(long)

length

public long length()

Description copied from class: IndexInput

The number of bytes in the file.

Specified by:

length in class IndexInput

clone

public IndexInput clone()

Description copied from class: IndexInput

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.

Warning: Lucene never closes cloned IndexInputs, it will only call IndexInput.close() on the original object.

If you access the cloned IndexInput after closing the original object, any readXXX methods will throw AlreadyClosedException.

This method is NOT thread safe, so if the current IndexInput is being used by one thread while clone is called by another, disaster could strike.

Overrides:

clone in class IndexInput

slice

public IndexInput slice(java.lang.String sliceDescription,
                        long offset,
                        long length)
                 throws java.io.IOException

Description copied from class: IndexInput

Creates a slice of this index input, with the given description, offset, and length. The slice is sought to the beginning.

Specified by:

slice in class IndexInput

Throws:

java.io.IOException