org.terrier.structures.postings
Class FieldPostingImpl

java.lang.Object
  extended by org.terrier.structures.postings.BasicPostingImpl
      extended by org.terrier.structures.postings.FieldPostingImpl
All Implemented Interfaces:
org.apache.hadoop.io.Writable, FieldPosting, Posting, WritablePosting

public class FieldPostingImpl
extends BasicPostingImpl
implements FieldPosting

Implementation of a posting containing fields


Field Summary
 
Fields inherited from class org.terrier.structures.postings.BasicPostingImpl
id, tf
 
Constructor Summary
FieldPostingImpl()
          default constructor
FieldPostingImpl(int _fieldCount)
          constructor
FieldPostingImpl(int[] _fieldFrequencies)
          constructor
FieldPostingImpl(int id, int tf, int _fieldCount)
          constructor
FieldPostingImpl(int id, int tf, int[] _fieldFrequencies)
          constructor
 
Method Summary
 WritablePosting asWritablePosting()
          Copies this posting to one free of an iterator.
 int[] getFieldFrequencies()
          Returns the frequencies of the term in each field of the document
 int[] getFieldLengths()
          Returns the lengths of the each fields in the current document
 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

FieldPostingImpl

public FieldPostingImpl()
default constructor


FieldPostingImpl

public FieldPostingImpl(int id,
                        int tf,
                        int _fieldCount)
constructor

Parameters:
id -
tf -
_fieldCount -

FieldPostingImpl

public FieldPostingImpl(int id,
                        int tf,
                        int[] _fieldFrequencies)
constructor

Parameters:
id -
tf -
_fieldFrequencies -

FieldPostingImpl

public FieldPostingImpl(int[] _fieldFrequencies)
constructor

Parameters:
_fieldFrequencies -

FieldPostingImpl

public FieldPostingImpl(int _fieldCount)
constructor

Parameters:
_fieldCount -
Method Detail

getFieldFrequencies

public int[] getFieldFrequencies()
Returns the frequencies of the term in each field of the document

Specified by:
getFieldFrequencies in interface FieldPosting

getFieldLengths

public int[] getFieldLengths()
Returns the lengths of the each fields in the current document

Specified by:
getFieldLengths in interface FieldPosting

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
Description copied from class: BasicPostingImpl
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


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