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org.eclipse.persistence.jpa.internal.jpql
Class LiteralVisitor

java.lang.Object
org.eclipse.persistence.jpa.internal.jpql.parser.AnonymousExpressionVisitor
org.eclipse.persistence.jpa.internal.jpql.LiteralVisitor

All Implemented Interfaces:

ExpressionVisitor

public final class LiteralVisitor

extends AnonymousExpressionVisitor

This visitor traverses an Expression and retrieves the "literal" value. The literal to retrieve depends on the type. The literal is basically a string value like an identification variable name, an input parameter, a path expression, an abstract schema name, etc.

Since:

2.3

Version:

2.3

Author:

Pascal Filion

Field Summary

java.lang.String	literal The literal value retrieved from the visited Expression.
private LiteralType	type The LiteralType helps to determine when traversing an Expression what to retrieve.

Constructor Summary

LiteralVisitor()
Creates a new VariableNameVisitor.

LiteralVisitor(LiteralType type)
Creates a new VariableNameVisitor.

Method Summary

void	setType(LiteralType type) Changes the way this visitor should retrieve the literal value.
void	visit(AbstractSchemaName expression) Visits the AbstractSchemaName expression.
void	visit(CollectionValuedPathExpression expression) Visits the CollectionValuedPathExpression expression.
void	visit(EntityTypeLiteral expression) Visits the EntityTypeLiteral expression.
void	visit(IdentificationVariable expression) Visits the IdentificationVariable expression.
void	visit(InputParameter expression) Visits the InputParameter expression.
void	visit(Join expression) Visits the Join expression.
void	visit(JoinFetch expression) Visits the FetchJoin expression.
void	visit(StateFieldPathExpression expression) Visits the StateFieldPathExpression expression.
void	visit(StringLiteral expression) Visits the StringLiteral expression.
private void	visitAbstractPathExpression(AbstractPathExpression expression)

Methods inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AnonymousExpressionVisitor

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, 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, visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Field Detail

literal

public java.lang.String literal

The literal value retrieved from the visited Expression.

type

private LiteralType type

The LiteralType helps to determine when traversing an Expression what to retrieve.

Constructor Detail

LiteralVisitor

public LiteralVisitor()

Creates a new VariableNameVisitor.

LiteralVisitor

LiteralVisitor(LiteralType type)

Creates a new VariableNameVisitor.

Parameters:

type - One of the possible way to retrieve a variable name

Method Detail

setType

public void setType(LiteralType type)

Changes the way this visitor should retrieve the literal value.

Parameters:

type - One of the possible LiteralTypes

visit

public void visit(AbstractSchemaName expression)

Visits the AbstractSchemaName expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(CollectionValuedPathExpression expression)

Visits the CollectionValuedPathExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(EntityTypeLiteral expression)

Visits the EntityTypeLiteral expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(IdentificationVariable expression)

Visits the IdentificationVariable expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(InputParameter expression)

Visits the InputParameter expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(Join expression)

Visits the Join expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(JoinFetch expression)

Visits the FetchJoin expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(StateFieldPathExpression expression)

Visits the StateFieldPathExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(StringLiteral expression)

Visits the StringLiteral expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AnonymousExpressionVisitor

Parameters:

expression - The Expression to visit

visitAbstractPathExpression

private void visitAbstractPathExpression(AbstractPathExpression expression)

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