org.elasticsearch.common.compress
Class CompressedIndexInput<T extends CompressorContext>

java.lang.Object
  org.apache.lucene.store.DataInput
      org.apache.lucene.store.IndexInput
          org.elasticsearch.common.compress.CompressedIndexInput<T>

All Implemented Interfaces:

Closeable, Cloneable

Direct Known Subclasses:

LZFCompressedIndexInput, SnappyCompressedIndexInput

public abstract class CompressedIndexInput<T extends CompressorContext>
extends org.apache.lucene.store.IndexInput

Field Summary

protected T	context
protected byte[]	uncompressed
protected int	uncompressedLength

Constructor Summary

CompressedIndexInput(org.apache.lucene.store.IndexInput in, T context)

Method Summary

int	available() Method is overridden to report number of bytes that can now be read from decoded data buffer, without reading bytes from the underlying stream.
Object	clone()
void	close()
protected abstract void	doClose()
long	getFilePointer()
long	length()
int	read(byte[] buffer, int offset, int length, boolean fullRead)
byte	readByte()
void	readBytes(byte[] b, int offset, int len)
protected abstract void	readHeader(org.apache.lucene.store.IndexInput in)
protected boolean	readyBuffer()
void	seek(long pos)
protected abstract int	uncompress(org.apache.lucene.store.IndexInput in, byte[] out) Uncompress the data into the out array, returning the size uncompressed

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

copyBytes, skipChars, toString

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

readBytes, readChars, readInt, readLong, readShort, readString, readStringStringMap, readVInt, readVLong, setModifiedUTF8StringsMode

Methods inherited from class java.lang.Object

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

Field Detail

context

protected final T extends CompressorContext context

uncompressed

protected byte[] uncompressed

uncompressedLength

protected int uncompressedLength

Constructor Detail

CompressedIndexInput

public CompressedIndexInput(org.apache.lucene.store.IndexInput in,
                            T context)
                     throws IOException

Throws:

IOException

Method Detail

available

public int available()
              throws IOException

Method is overridden to report number of bytes that can now be read from decoded data buffer, without reading bytes from the underlying stream. Never throws an exception; returns number of bytes available without further reads from underlying source; -1 if stream has been closed, or 0 if an actual read (and possible blocking) is needed to find out.

Throws:

IOException

readByte

public byte readByte()
              throws IOException

Specified by:

readByte in class org.apache.lucene.store.DataInput

Throws:

IOException

read

public int read(byte[] buffer,
                int offset,
                int length,
                boolean fullRead)
         throws IOException

Throws:

IOException

readBytes

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

Specified by:

readBytes in class org.apache.lucene.store.DataInput

Throws:

IOException

getFilePointer

public long getFilePointer()

Specified by:

getFilePointer in class org.apache.lucene.store.IndexInput

seek

public void seek(long pos)
          throws IOException

Specified by:

seek in class org.apache.lucene.store.IndexInput

Throws:

IOException

length

public long length()

Specified by:

length in class org.apache.lucene.store.IndexInput

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class org.apache.lucene.store.IndexInput

Throws:

IOException

doClose

protected abstract void doClose()
                         throws IOException

Throws:

IOException

readyBuffer

protected boolean readyBuffer()
                       throws IOException

Throws:

IOException

readHeader

protected abstract void readHeader(org.apache.lucene.store.IndexInput in)
                            throws IOException

Throws:

IOException

uncompress

protected abstract int uncompress(org.apache.lucene.store.IndexInput in,
                                  byte[] out)
                           throws IOException

Uncompress the data into the out array, returning the size uncompressed

Throws:

IOException

clone

public Object clone()

Overrides:

clone in class org.apache.lucene.store.DataInput