org.exist.xquery
Class BasicExpressionVisitor

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

All Implemented Interfaces:

ExpressionVisitor

Direct Known Subclasses:

BasicExpressionVisitor.FirstStepVisitor, BasicExpressionVisitor.VariableRefVisitor, DefaultExpressionVisitor

public class BasicExpressionVisitor
extends Object
implements ExpressionVisitor

Basic implementation of the ExpressionVisitor interface. This implementation will traverse a PathExpr object if it wraps around a single other expression. All other methods are empty.

Author:

wolf

Nested Class Summary

static class	BasicExpressionVisitor.FirstStepVisitor
static class	BasicExpressionVisitor.VariableRefVisitor

Constructor Summary

BasicExpressionVisitor()

Method Summary

static LocationStep	findFirstStep(Expression expr)
static List	findLocationSteps(Expression expr)
static VariableReference	findVariableRef(Expression expr)
void	visit(Expression expression) Default fallback method if no other method matches the object's type.
void	visitAndExpr(OpAnd and)
void	visitAttribConstructor(AttributeConstructor constructor)
void	visitAttribConstructor(DynamicAttributeConstructor constructor)
void	visitBuiltinFunction(Function function)
void	visitCastExpr(CastExpression expression) Found a CastExpression
void	visitConditional(ConditionalExpression conditional)
void	visitElementConstructor(ElementConstructor constructor)
void	visitFilteredExpr(FilteredExpression filtered)
void	visitForExpression(ForExpr forExpr)
void	visitFtExpression(ExtFulltext fulltext)
void	visitGeneralComparison(GeneralComparison comparison)
void	visitLetExpression(LetExpr letExpr)
void	visitLocationStep(LocationStep locationStep) Found a LocationStep
void	visitOrExpr(OpOr or)
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	visitTextConstructor(DynamicTextConstructor constructor)
void	visitUnionExpr(Union union)
void	visitUserFunction(UserDefinedFunction function)
void	visitVariableReference(VariableReference ref)

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicExpressionVisitor

public BasicExpressionVisitor()

Method Detail

visit

public void visit(Expression expression)

Description copied from interface: ExpressionVisitor

Default fallback method if no other method matches the object's type.

Specified by:

visit in interface ExpressionVisitor

visitCastExpr

public void visitCastExpr(CastExpression expression)

Description copied from interface: ExpressionVisitor

Found a CastExpression

Specified by:

visitCastExpr in interface ExpressionVisitor

visitFtExpression

public void visitFtExpression(ExtFulltext fulltext)

Specified by:

visitFtExpression in interface ExpressionVisitor

visitPathExpr

public void visitPathExpr(PathExpr expression)

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

Specified by:

visitPathExpr in interface ExpressionVisitor

visitGeneralComparison

public void visitGeneralComparison(GeneralComparison comparison)

Specified by:

visitGeneralComparison in interface ExpressionVisitor

visitUnionExpr

public void visitUnionExpr(Union union)

Specified by:

visitUnionExpr in interface ExpressionVisitor

visitAndExpr

public void visitAndExpr(OpAnd and)

Specified by:

visitAndExpr in interface ExpressionVisitor

visitOrExpr

public void visitOrExpr(OpOr or)

Specified by:

visitOrExpr in interface ExpressionVisitor

visitLocationStep

public void visitLocationStep(LocationStep locationStep)

Description copied from interface: ExpressionVisitor

Found a LocationStep

Specified by:

visitLocationStep in interface ExpressionVisitor

visitFilteredExpr

public void visitFilteredExpr(FilteredExpression filtered)

Specified by:

visitFilteredExpr in interface ExpressionVisitor

visitPredicate

public void visitPredicate(Predicate predicate)

Specified by:

visitPredicate in interface ExpressionVisitor

visitVariableReference

public void visitVariableReference(VariableReference ref)

Specified by:

visitVariableReference in interface ExpressionVisitor

findFirstStep

public static LocationStep findFirstStep(Expression expr)

findLocationSteps

public static List findLocationSteps(Expression expr)

findVariableRef

public static VariableReference findVariableRef(Expression expr)

visitForExpression

public void visitForExpression(ForExpr forExpr)

Specified by:

visitForExpression in interface ExpressionVisitor

visitLetExpression

public void visitLetExpression(LetExpr letExpr)

Specified by:

visitLetExpression in interface ExpressionVisitor

visitBuiltinFunction

public void visitBuiltinFunction(Function function)

Specified by:

visitBuiltinFunction in interface ExpressionVisitor

visitUserFunction

public void visitUserFunction(UserDefinedFunction function)

Specified by:

visitUserFunction in interface ExpressionVisitor

visitConditional

public void visitConditional(ConditionalExpression conditional)

Specified by:

visitConditional in interface ExpressionVisitor

visitElementConstructor

public void visitElementConstructor(ElementConstructor constructor)

Specified by:

visitElementConstructor in interface ExpressionVisitor

visitTextConstructor

public void visitTextConstructor(DynamicTextConstructor constructor)

Specified by:

visitTextConstructor in interface ExpressionVisitor

visitAttribConstructor

public void visitAttribConstructor(AttributeConstructor constructor)

Specified by:

visitAttribConstructor in interface ExpressionVisitor

visitAttribConstructor

public void visitAttribConstructor(DynamicAttributeConstructor constructor)

Specified by:

visitAttribConstructor in interface ExpressionVisitor