org.apache.lucene.search
Class Explanation.IDFExplanation

java.lang.Object
  org.apache.lucene.search.Explanation.IDFExplanation

All Implemented Interfaces:

Serializable

Enclosing class:

Explanation

public abstract static class Explanation.IDFExplanation
extends Object
implements Serializable

Small Util class used to pass both an idf factor as well as an explanation for that factor. This class will likely be held on a Weight, so be aware before storing any large or un-serializable fields.

See Also:

Serialized Form

Constructor Summary

Explanation.IDFExplanation()

Method Summary

abstract String	explain() This should be calculated lazily if possible.
abstract float	getIdf()

Methods inherited from class java.lang.Object

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

Constructor Detail

Explanation.IDFExplanation

public Explanation.IDFExplanation()

Method Detail

getIdf

public abstract float getIdf()

Returns:

the idf factor

explain

public abstract String explain()

This should be calculated lazily if possible.

Returns:

the explanation for the idf factor.