org.galagosearch.core.retrieval.traversal
Class ImplicitFeatureCastTraversal

java.lang.Object
  org.galagosearch.core.retrieval.traversal.ImplicitFeatureCastTraversal

All Implemented Interfaces:

Traversal

public class ImplicitFeatureCastTraversal
extends java.lang.Object
implements Traversal

For many kinds of queries, it may be preferable to not have to type an explicit #feature operator around a count or extents term. For example, we want #combine(#feature:dirichlet(#counts:dog())) to be the same as #combine(dog). This transformation automatically adds the #feature:dirichlet operator.

Author:

trevor

Constructor Summary

ImplicitFeatureCastTraversal(StructuredRetrieval retrieval)

Method Summary

Node	afterNode(Node node)
void	beforeNode(Node node)
boolean	isCountNode(Node node)

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplicitFeatureCastTraversal

public ImplicitFeatureCastTraversal(StructuredRetrieval retrieval)

Method Detail

isCountNode

public boolean isCountNode(Node node)
                    throws java.lang.Exception

Throws:

java.lang.Exception

beforeNode

public void beforeNode(Node node)
                throws java.lang.Exception

Specified by:

beforeNode in interface Traversal

Throws:

java.lang.Exception

afterNode

public Node afterNode(Node node)
               throws java.lang.Exception

Specified by:

afterNode in interface Traversal

Throws:

java.lang.Exception