org.exist.xquery
Class DefaultExpressionVisitor

java.lang.Object
  org.exist.xquery.BasicExpressionVisitor
      org.exist.xquery.DefaultExpressionVisitor

All Implemented Interfaces:

ExpressionVisitor

Direct Known Subclasses:

Optimizer

public class DefaultExpressionVisitor
extends BasicExpressionVisitor

An ExpressionVisitor which traverses the entire expression tree. Methods may be overwritten by subclasses to filter out the events they need.

Nested Class Summary

Nested classes/interfaces inherited from class org.exist.xquery.BasicExpressionVisitor

BasicExpressionVisitor.FirstStepVisitor

Constructor Summary

DefaultExpressionVisitor()

Method Summary

void	visitConditional(ConditionalExpression conditional)
void	visitForExpression(ForExpr forExpr)
void	visitLetExpression(LetExpr letExpr)
void	visitLocationStep(LocationStep locationStep) Found a LocationStep
void	visitPathExpr(PathExpr expression) Default implementation will traverse a PathExpr if it is just a wrapper around another single expression object.
void	visitPredicate(Predicate predicate)
void	visitUserFunction(UserDefinedFunction function)

Methods inherited from class org.exist.xquery.BasicExpressionVisitor

findFirstStep, findLocationSteps, visit, visitAndExpr, visitBuiltinFunction, visitCastExpr, visitFtExpression, visitGeneralComparison, visitOrExpr, visitUnionExpr

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultExpressionVisitor

public DefaultExpressionVisitor()

Method Detail

visitPathExpr

public void visitPathExpr(PathExpr expression)

Description copied from class: BasicExpressionVisitor

Default implementation will traverse a PathExpr if it is just a wrapper around another single expression object.

Specified by:

visitPathExpr in interface ExpressionVisitor

Overrides:

visitPathExpr in class BasicExpressionVisitor

visitUserFunction

public void visitUserFunction(UserDefinedFunction function)

Specified by:

visitUserFunction in interface ExpressionVisitor

Overrides:

visitUserFunction in class BasicExpressionVisitor

visitForExpression

public void visitForExpression(ForExpr forExpr)

Specified by:

visitForExpression in interface ExpressionVisitor

Overrides:

visitForExpression in class BasicExpressionVisitor

visitLetExpression

public void visitLetExpression(LetExpr letExpr)

Specified by:

visitLetExpression in interface ExpressionVisitor

Overrides:

visitLetExpression in class BasicExpressionVisitor

visitConditional

public void visitConditional(ConditionalExpression conditional)

Specified by:

visitConditional in interface ExpressionVisitor

Overrides:

visitConditional in class BasicExpressionVisitor

visitLocationStep

public void visitLocationStep(LocationStep locationStep)

Description copied from interface: ExpressionVisitor

Found a LocationStep

Specified by:

visitLocationStep in interface ExpressionVisitor

Overrides:

visitLocationStep in class BasicExpressionVisitor

visitPredicate

public void visitPredicate(Predicate predicate)

Specified by:

visitPredicate in interface ExpressionVisitor

Overrides:

visitPredicate in class BasicExpressionVisitor