ParameterTypeVisitor (EclipseLink 2.4.2, build 'v20130514-5956486' API Reference)

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EclipseLink 2.4.2, build 'v20130514-5956486' API Reference

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org.eclipse.persistence.jpa.jpql
Class ParameterTypeVisitor

java.lang.Object
  org.eclipse.persistence.jpa.jpql.parser.AnonymousExpressionVisitor
      org.eclipse.persistence.jpa.jpql.parser.AbstractTraverseParentVisitor
          org.eclipse.persistence.jpa.jpql.ParameterTypeVisitor

All Implemented Interfaces:: ExpressionVisitor

Direct Known Subclasses:: DefaultParameterTypeVisitor, EclipseLinkParameterTypeVisitor

public class ParameterTypeVisitor
extends AbstractTraverseParentVisitor
extends AbstractTraverseParentVisitor

This visitor's responsibility is to find the type of an input parameter.

Provisional API: This interface is part of an interim API that is still under development and expected to change significantly before reaching stability. It is available at this early stage to solicit feedback from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken (repeatedly) as the API evolves.

Version:: 2.4
Author:: Pascal Filion
Since:: 2.3

Field Summary
`protected Expression`	`currentExpression` This is used to prevent an infinite loop between input parameters.
`protected Expression`	`expression` The `Expression` that will help to determine the type of the input parameter.
`protected boolean`	`ignoreType` Used to ignore the type when calculating it.
`protected InputParameter`	`inputParameter` The `InputParameter` for which its type will be searched by visiting the query.
`protected JPQLQueryContext`	`queryContext` The context used to query information about the query.
`protected java.lang.Class<?>`	`type` The well defined type, which does not have to be calculated.

Constructor Summary
`ParameterTypeVisitor(JPQLQueryContext queryContext)` Creates a new `ParameterTypeVisitor`.

Method Summary
`protected void`	`dispose()` Disposes this visitor.
`IType`	`getType()` Returns the type, if it can be determined, of the input parameter.
`void`	`visit(AbsExpression expression)` Visits the `AbsExpression` expression.
`void`	`visit(AdditionExpression expression)` Visits the `AdditionExpression` expression.
`void`	`visit(AndExpression expression)` Visits the `AndExpression` expression.
`void`	`visit(AvgFunction expression)` Visits the `AvgFunction` expression.
`void`	`visit(BetweenExpression expression)` Visits the `BetweenExpression` expression.
`void`	`visit(CollectionValuedPathExpression expression)` Visits the `CollectionValuedPathExpression` expression.
`void`	`visit(ComparisonExpression expression)` Visits the `ComparisonExpression` expression.
`void`	`visit(ConcatExpression expression)` Visits the `ConcatExpression` expression.
`void`	`visit(CountFunction expression)` Visits the `CountFunction` expression.
`void`	`visit(DivisionExpression expression)` Visits the `DivisionExpression` expression.
`void`	`visit(EmptyCollectionComparisonExpression expression)` Visits the `EmptyCollectionComparisonExpression` expression.
`void`	`visit(ExistsExpression expression)` Visits the `ExistsExpression` expression.
`void`	`visit(FunctionExpression expression)` Visits the `FunctionExpression` expression.
`void`	`visit(IdentificationVariable expression)` Visits the `IdentificationVariable` expression.
`void`	`visit(InExpression expression)` Visits the `InExpression` expression.
`void`	`visit(InputParameter expression)` Visits the `InputParameter` expression.
`void`	`visit(LengthExpression expression)` Visits the `LengthExpression` expression.
`void`	`visit(LikeExpression expression)` Visits the `LikeExpression` expression.
`void`	`visit(LowerExpression expression)` Visits the `LowerExpression` expression.
`void`	`visit(MaxFunction expression)` Visits the `MaxFunction` expression.
`void`	`visit(MinFunction expression)` Visits the `MinFunction` expression.
`void`	`visit(ModExpression expression)` Visits the `ModExpression` expression.
`void`	`visit(MultiplicationExpression expression)` Visits the `MultiplicationExpression` expression.
`void`	`visit(NullComparisonExpression expression)` Visits the `NullComparisonExpression` expression.
`void`	`visit(NumericLiteral expression)` Visits the `NumericLiteral` expression.
`void`	`visit(OrExpression expression)` Visits the `OrExpression` expression.
`void`	`visit(SizeExpression expression)` Visits the `SizeExpression` expression.
`void`	`visit(SqrtExpression expression)` Visits the `SqrtExpression` expression.
`void`	`visit(StateFieldPathExpression expression)` Visits the `StateFieldPathExpression` expression.
`void`	`visit(SubstringExpression expression)` Visits the `SubstringExpression` expression.
`void`	`visit(SubtractionExpression expression)` Visits the `SubtractionExpression` expression.
`void`	`visit(SumFunction expression)` Visits the `SumFunction` expression.
`void`	`visit(TrimExpression expression)` Visits the `TrimExpression` expression.
`void`	`visit(UpdateItem expression)` Visits the `UpdateItem` expression.
`protected void`	`visitCompoundExpression(CompoundExpression expression)`

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractTraverseParentVisitor
`visit, visit`

Methods inherited from class org.eclipse.persistence.jpa.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`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

currentExpression

protected Expression currentExpression

This is used to prevent an infinite loop between input parameters. Example: ":arg1 = :arg2".

expression

protected Expression expression

The Expression that will help to determine the type of the input parameter.

ignoreType

protected boolean ignoreType

Used to ignore the type when calculating it. If Object.class was used, then it could incorrectly calculate the type. Example: ":arg = 'JPQL' AND :arg IS NULL", the second :arg should be ignored.

inputParameter

protected InputParameter inputParameter

The InputParameter for which its type will be searched by visiting the query.

queryContext

protected final JPQLQueryContext queryContext

The context used to query information about the query.

type

protected java.lang.Class<?> type

The well defined type, which does not have to be calculated.

Constructor Detail