it.unimi.dsi.mg4j.search.visitor
Class AbstractDocumentIteratorVisitor

java.lang.Object
  it.unimi.dsi.mg4j.search.visitor.AbstractDocumentIteratorVisitor

All Implemented Interfaces:

DocumentIteratorVisitor

Direct Known Subclasses:

CounterCollectionVisitor, CounterSetupVisitor, TermCollectionVisitor

public abstract class AbstractDocumentIteratorVisitor
extends Object
implements DocumentIteratorVisitor

An abstract implementation of a DocumentIteratorVisitor that does nothing and always returns true when visiting internal nodes.

Constructor Summary

AbstractDocumentIteratorVisitor()

Method Summary

DocumentIteratorVisitor	prepare() Prepares the internal state of this visitor for a(nother) visit.
boolean	visitPost(DocumentIterator documentIterator) Visits an internal node after recursing into the corresponding subtree.
boolean	visitPre(DocumentIterator documentIterator) Visits an internal node before recursing into the corresponding subtree.

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.mg4j.search.visitor.DocumentIteratorVisitor

visit

Constructor Detail

AbstractDocumentIteratorVisitor

public AbstractDocumentIteratorVisitor()

Method Detail

prepare

public DocumentIteratorVisitor prepare()

Description copied from interface: DocumentIteratorVisitor

Prepares the internal state of this visitor for a(nother) visit.

By specification, it must be safe to call this method any number of times.

Specified by:

prepare in interface DocumentIteratorVisitor

Returns:

this visitor.

visitPre

public boolean visitPre(DocumentIterator documentIterator)

Description copied from interface: DocumentIteratorVisitor

Visits an internal node before recursing into the corresponding subtree.

Specified by:

visitPre in interface DocumentIteratorVisitor

Parameters:

documentIterator - the internal node to be visited.

Returns:

true if the visit should continue.

visitPost

public boolean visitPost(DocumentIterator documentIterator)

Description copied from interface: DocumentIteratorVisitor

Visits an internal node after recursing into the corresponding subtree.

Specified by:

visitPost in interface DocumentIteratorVisitor

Parameters:

documentIterator - the internal node to be visited.

Returns:

true if the visit should continue.