org.apache.lucene.search
Class SingleTermEnum

java.lang.Object
  extended by org.apache.lucene.index.TermEnum
      extended by org.apache.lucene.search.FilteredTermEnum
          extended by org.apache.lucene.search.SingleTermEnum
All Implemented Interfaces:
Closeable

public class SingleTermEnum
extends FilteredTermEnum

Subclass of FilteredTermEnum for enumerating a single term.

This can be used by MultiTermQuerys that need only visit one term, but want to preserve MultiTermQuery semantics such as MultiTermQuery.rewriteMethod.


Field Summary
 
Fields inherited from class org.apache.lucene.search.FilteredTermEnum
actualEnum, currentTerm
 
Constructor Summary
SingleTermEnum(IndexReader reader, Term singleTerm)
          Creates a new SingleTermEnum.
 
Method Summary
 float difference()
          Equality measure on the term
protected  boolean endEnum()
          Indicates the end of the enumeration has been reached
protected  boolean termCompare(Term term)
          Equality compare on the term
 
Methods inherited from class org.apache.lucene.search.FilteredTermEnum
close, docFreq, next, setEnum, term
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SingleTermEnum

public SingleTermEnum(IndexReader reader,
                      Term singleTerm)
               throws IOException
Creates a new SingleTermEnum.

After calling the constructor the enumeration is already pointing to the term, if it exists.

Throws:
IOException
Method Detail

difference

public float difference()
Description copied from class: FilteredTermEnum
Equality measure on the term

Specified by:
difference in class FilteredTermEnum

endEnum

protected boolean endEnum()
Description copied from class: FilteredTermEnum
Indicates the end of the enumeration has been reached

Specified by:
endEnum in class FilteredTermEnum

termCompare

protected boolean termCompare(Term term)
Description copied from class: FilteredTermEnum
Equality compare on the term

Specified by:
termCompare in class FilteredTermEnum


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