org.teiid.language.visitor

Class DelegatingHierarchyVisitor

java.lang.Object

org.teiid.language.visitor.AbstractLanguageVisitor

org.teiid.language.visitor.HierarchyVisitor

org.teiid.language.visitor.DelegatingHierarchyVisitor

All Implemented Interfaces:

LanguageObjectVisitor

public class DelegatingHierarchyVisitor
extends HierarchyVisitor

Delegates pre- and post-processing for each node in the hierarchy to delegate visitors.

Constructor Summary

Constructors

Constructor and Description
DelegatingHierarchyVisitor(LanguageObjectVisitor preProcessingDelegate, LanguageObjectVisitor postProcessingDelegate)

Method Summary

Modifier and Type	Method and Description
protected LanguageObjectVisitor	getPostVisitor()
protected LanguageObjectVisitor	getPreVisitor()
static void	postOrderVisit(LanguageObjectVisitor behaviorVisitor, LanguageObject object) This utility method can be used to execute the behaviorVisitor in a post-order walk of the language objects.
static void	preOrderVisit(LanguageObjectVisitor behaviorVisitor, LanguageObject object) This utility method can be used to execute the behaviorVisitor in a pre-order walk of the language objects.
void	visitNode(LanguageObject obj) Visit the LanguageObject instance to perform the Visitor's operation on that instance.

Methods inherited from class org.teiid.language.visitor.HierarchyVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class org.teiid.language.visitor.AbstractLanguageVisitor

visit, visit, visit, visit, visit, visit, visit, visitNodes, visitNodes

Methods inherited from class java.lang.Object

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

Constructor Detail

DelegatingHierarchyVisitor

public DelegatingHierarchyVisitor(LanguageObjectVisitor preProcessingDelegate,
                                  LanguageObjectVisitor postProcessingDelegate)

Method Detail

getPostVisitor

protected LanguageObjectVisitor getPostVisitor()

getPreVisitor

protected LanguageObjectVisitor getPreVisitor()

visitNode

public void visitNode(LanguageObject obj)

Description copied from class: AbstractLanguageVisitor

Visit the LanguageObject instance to perform the Visitor's operation on that instance. This method can also be used by the subclass to visit any LanguageObject instances that the given instance may contain.

Overrides:

visitNode in class AbstractLanguageVisitor

Parameters:

obj - an LanguageObject instance

See Also:

HierarchyVisitor

preOrderVisit

public static void preOrderVisit(LanguageObjectVisitor behaviorVisitor,
                                 LanguageObject object)

This utility method can be used to execute the behaviorVisitor in a pre-order walk of the language objects. "Pre-order" in this case means that the visit method of the behaviorVisitor will be called before the visit method of it's children. It is expected that the behavior visit does NOT perform iteration, as that function will be performed by the HierarchyVisitor.

Parameters:

behaviorVisitor - The visitor specifying what behavior is performed at each node type

object - The root of the object tree to perform visitation on

postOrderVisit

public static void postOrderVisit(LanguageObjectVisitor behaviorVisitor,
                                  LanguageObject object)

This utility method can be used to execute the behaviorVisitor in a post-order walk of the language objects. "Post-order" in this case means that the visit method of the behaviorVisitor will be called after the visit method of it's children. It is expected that the behavior visit does NOT perform iteration, as that function will be performed by the HierarchyVisitor.

Parameters:

behaviorVisitor - The visitor specifying what behavior is performed at each node type

object - The root of the object tree to perform visitation on