org.terrier.structures
Class BlockLexiconEntry

java.lang.Object
  extended by org.terrier.structures.LexiconEntry
      extended by org.terrier.structures.BasicLexiconEntry
          extended by org.terrier.structures.BlockLexiconEntry
All Implemented Interfaces:
Serializable, org.apache.hadoop.io.Writable, BitFilePosition, BitIndexPointer, BlockEntryStatistics, EntryStatistics, Pointer

public class BlockLexiconEntry
extends BasicLexiconEntry
implements BlockEntryStatistics

Blocks lexicon entry. A basic lexicon entry with block statistics.

See Also:
Serialized Form

Nested Class Summary
static class BlockLexiconEntry.Factory
          Factory for creating block lexicon entries
 
Field Summary
 
Fields inherited from class org.terrier.structures.BasicLexiconEntry
n_t, startBitOffset, startOffset, termId, TF
 
Fields inherited from interface org.terrier.structures.BitIndexPointer
BIT_MASK, FILE_SHIFT, MAX_FILE_ID
 
Constructor Summary
BlockLexiconEntry()
          Construct an instance of the class.
BlockLexiconEntry(int tid, int n_t, int TF, byte fileId, BitFilePosition offset, int _blockCount)
          Construct an instance of the class with
BlockLexiconEntry(int tid, int n_t, int TF, byte fileId, long _startOffset, byte _startBitOffset, int _blockCount)
          Construct an instance of the class with
BlockLexiconEntry(int tid, int n_t, int TF, int _blockCount)
          Construct an instance of the class with
 
Method Summary
 void add(EntryStatistics le)
          increment this lexicon entry by another
 int getBlockCount()
          The number of blocks that this term has.
 void readFields(DataInput in)
          
 void subtract(EntryStatistics le)
          alter this lexicon entry to subtract another lexicon entry
 void write(DataOutput out)
          
 
Methods inherited from class org.terrier.structures.BasicLexiconEntry
getDocumentFrequency, getFileNumber, getFrequency, getNumberOfEntries, getOffset, getOffsetBits, getTermId, pointerToString, setBitIndexPointer, setFileNumber, setNumberOfEntries, setOffset, setOffset, setPointer, setStatistics, setTermId, toString
 
Methods inherited from class org.terrier.structures.LexiconEntry
equals, getWritableEntryStatistics, hashCode
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.terrier.structures.EntryStatistics
getDocumentFrequency, getFrequency, getTermId, getWritableEntryStatistics
 

Constructor Detail

BlockLexiconEntry

public BlockLexiconEntry()
Construct an instance of the class.


BlockLexiconEntry

public BlockLexiconEntry(int tid,
                         int n_t,
                         int TF,
                         byte fileId,
                         BitFilePosition offset,
                         int _blockCount)
Construct an instance of the class with

Parameters:
tid -
n_t -
TF -
fileId -
offset -
_blockCount -

BlockLexiconEntry

public BlockLexiconEntry(int tid,
                         int n_t,
                         int TF,
                         byte fileId,
                         long _startOffset,
                         byte _startBitOffset,
                         int _blockCount)
Construct an instance of the class with

Parameters:
tid -
n_t -
TF -
fileId -
_startOffset -
_startBitOffset -
_blockCount -

BlockLexiconEntry

public BlockLexiconEntry(int tid,
                         int n_t,
                         int TF,
                         int _blockCount)
Construct an instance of the class with

Parameters:
tid -
n_t -
TF -
_blockCount -
Method Detail

getBlockCount

public int getBlockCount()
The number of blocks that this term has. Needed by the BlockInvertedIndexBuilder.

Specified by:
getBlockCount in interface BlockEntryStatistics

readFields

public void readFields(DataInput in)
                throws IOException
Description copied from class: BasicLexiconEntry

Specified by:
readFields in interface org.apache.hadoop.io.Writable
Overrides:
readFields in class BasicLexiconEntry
Throws:
IOException

write

public void write(DataOutput out)
           throws IOException
Description copied from class: BasicLexiconEntry

Specified by:
write in interface org.apache.hadoop.io.Writable
Overrides:
write in class BasicLexiconEntry
Throws:
IOException

add

public void add(EntryStatistics le)
increment this lexicon entry by another

Specified by:
add in interface EntryStatistics
Overrides:
add in class BasicLexiconEntry

subtract

public void subtract(EntryStatistics le)
alter this lexicon entry to subtract another lexicon entry

Specified by:
subtract in interface EntryStatistics
Overrides:
subtract in class BasicLexiconEntry


Terrier 3.6. Copyright © 2004-2011 University of Glasgow