org.eclipse.persistence.jpa.jpql.tools

Class AbstractContentAssistVisitor.EnumVisitor

java.lang.Object

org.eclipse.persistence.jpa.jpql.parser.AbstractExpressionVisitor

org.eclipse.persistence.jpa.jpql.tools.AbstractContentAssistVisitor.EnumVisitor

All Implemented Interfaces:

ExpressionVisitor

Enclosing class:

AbstractContentAssistVisitor

protected static final class AbstractContentAssistVisitor.EnumVisitor
extends AbstractExpressionVisitor

This visitor determines whether a path expression can be resolved as a fully qualified enum type and an enum constant.

The valid locations are:

• CollectionMemberExpression : entity_or_value_expression (before MEMBER identifier);
• InExpression : One of the items;
• CaseExpression : The ELSE expression;
• WhenClause : The WHEN or THEN expressions;
• FunctionExpression : One of the function items;
• ComparisonExpression : The left or right expression if the comparison identifier is either = or <>;
• UpdateItem : The new value;
• ConstructorExpression : One of the constructor items;
• CoalesceExpression : The expression at index 1 or greater;
• NullIfExpression : The second expression;

Field Summary

Fields

Modifier and Type	Field and Description
protected AbstractPathExpression	pathExpression The AbstractPathExpression being scanned for its location within the JPQL query.
protected boolean	valid Determines whether the path expression could potentially represent a fully qualified enum constant, which is dictated by the location of the path expression within the query.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EnumVisitor()

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes of the internal data.
boolean	isValid() Determines whether the path expression could potentially represent a fully qualified enum constant, which is dictated by the location of the path expression within the query.
void	visit(CaseExpression expression) Visits the CaseExpression expression.
void	visit(CoalesceExpression expression) Visits the CoalesceExpression expression.
void	visit(CollectionMemberExpression expression) Visits the CollectionMemberExpression expression.
void	visit(CollectionValuedPathExpression expression) Visits the CollectionValuedPathExpression expression.
void	visit(ComparisonExpression expression) Visits the ComparisonExpression expression.
void	visit(ConstructorExpression expression) Visits the ConstructorExpression expression.
void	visit(FunctionExpression expression) Visits the FunctionExpression expression.
void	visit(InExpression expression) Visits the InExpression expression.
void	visit(NullIfExpression expression) Visits the NullIfExpression expression.
void	visit(StateFieldPathExpression expression) Visits the StateFieldPathExpression expression.
void	visit(UpdateItem expression) Visits the UpdateItem expression.
void	visit(WhenClause expression) Visits the WhenClause expression.

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpressionVisitor

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

pathExpression

protected AbstractPathExpression pathExpression

The AbstractPathExpression being scanned for its location within the JPQL query.

valid

protected boolean valid

Determines whether the path expression could potentially represent a fully qualified enum constant, which is dictated by the location of the path expression within the query. Only a few location allows an enum constant.

Constructor Detail

EnumVisitor

protected EnumVisitor()

Method Detail

dispose

public void dispose()

Disposes of the internal data.

isValid

public boolean isValid()

Determines whether the path expression could potentially represent a fully qualified enum constant, which is dictated by the location of the path expression within the query. Only a few location allows an enum constant.

Returns:

true if the path expression represents a enum constant; false otherwise

visit

public void visit(CaseExpression expression)

Visits the CaseExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(CoalesceExpression expression)

Visits the CoalesceExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(CollectionMemberExpression expression)

Visits the CollectionMemberExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

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 AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(ComparisonExpression expression)

Visits the ComparisonExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(ConstructorExpression expression)

Visits the ConstructorExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(FunctionExpression expression)

Visits the FunctionExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(InExpression expression)

Visits the InExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(NullIfExpression expression)

Visits the NullIfExpression expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

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 AbstractExpressionVisitor

Parameters:

expression - The Expression to visit

visit

public void visit(UpdateItem expression)

Visits the UpdateItem expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The UpdateItem to visit

visit

public void visit(WhenClause expression)

Visits the WhenClause expression.

Specified by:

visit in interface ExpressionVisitor

Overrides:

visit in class AbstractExpressionVisitor

Parameters:

expression - The WhenClause to visit