org.terrier.structures.postings
Class BlockPostingImpl

java.lang.Object
  extended by org.terrier.structures.postings.BasicPostingImpl
      extended by org.terrier.structures.postings.BlockPostingImpl
All Implemented Interfaces:
org.apache.hadoop.io.Writable, BlockPosting, Posting, WritablePosting
Direct Known Subclasses:
BlockFieldPostingImpl

public class BlockPostingImpl
extends BasicPostingImpl
implements BlockPosting

BlockPostingImpl class


Field Summary
 
Fields inherited from class org.terrier.structures.postings.BasicPostingImpl
id, tf
 
Constructor Summary
BlockPostingImpl()
          empty constructor for Writable implementation
BlockPostingImpl(int docid, int frequency, int[] _positions)
          constructor
 
Method Summary
 WritablePosting asWritablePosting()
          Copies this posting to one free of an iterator.
 int[] getPositions()
          Return positions of occurrences
 void readFields(java.io.DataInput in)
          Reads the a single posting (not an iterable posting - use BitPostingIndex for that)
 java.lang.String toString()
          Makes a human readable form of this posting
 void write(java.io.DataOutput out)
          Writes the current posting (not an iterable posting - use DirectInvertedOutputStream for that).
 
Methods inherited from class org.terrier.structures.postings.BasicPostingImpl
getDocumentLength, getFrequency, getId, setId
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.terrier.structures.postings.Posting
getDocumentLength, getFrequency, getId, setId
 

Constructor Detail

BlockPostingImpl

public BlockPostingImpl()
empty constructor for Writable implementation


BlockPostingImpl

public BlockPostingImpl(int docid,
                        int frequency,
                        int[] _positions)
constructor

Parameters:
docid -
frequency -
_positions -
Method Detail

getPositions

public int[] getPositions()
Return positions of occurrences

Specified by:
getPositions in interface BlockPosting

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException
Reads the a single posting (not an iterable posting - use BitPostingIndex for that)

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

write

public void write(java.io.DataOutput out)
           throws java.io.IOException
Writes the current posting (not an iterable posting - use DirectInvertedOutputStream for that). Compression using this method is not expected to be comparable to bit-level compression.

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

asWritablePosting

public WritablePosting asWritablePosting()
Copies this posting to one free of an iterator. Kind of like a clone.

Specified by:
asWritablePosting in interface Posting
Overrides:
asWritablePosting in class BasicPostingImpl
Returns:
an identical posting, but which can be maniulated free of this iterator

toString

public java.lang.String toString()
Makes a human readable form of this posting

Overrides:
toString in class BasicPostingImpl


Terrier 3.5. Copyright © 2004-2011 University of Glasgow