Module org.eclipse.persistence.jpa.jpql

Package org.eclipse.persistence.jpa.jpql.tools.resolver

Class DerivedDeclaration

java.lang.Object

org.eclipse.persistence.jpa.jpql.tools.resolver.Declaration

org.eclipse.persistence.jpa.jpql.tools.resolver.AbstractRangeDeclaration

org.eclipse.persistence.jpa.jpql.tools.resolver.DerivedDeclaration

All Implemented Interfaces:

JPQLQueryDeclaration

public class DerivedDeclaration
extends AbstractRangeDeclaration

This DerivedDeclaration represents an identification variable declaration that was declared in the FROM clause of a SELECT subquery. The "root" object is not an entity name but a derived path expression.

Since:

2.5

Version:

2.5

See Also:

• IdentificationVariableDeclaration

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.persistence.jpa.jpql.JPQLQueryDeclaration

JPQLQueryDeclaration.Type

Field Summary

Fields inherited from class org.eclipse.persistence.jpa.jpql.tools.resolver.AbstractRangeDeclaration

joins

Fields inherited from class org.eclipse.persistence.jpa.jpql.tools.resolver.Declaration

baseExpression, declarationExpression, identificationVariable, rootPath

Constructor Summary

Constructors

Constructor	Description
DerivedDeclaration()	Creates a new DerivedDeclaration.

Method Summary

Modifier and Type	Method	Description
String	getSuperqueryVariableName()	If CollectionMemberDeclaration.isDerived() is true, then returns the identification variable used in the derived path expression that is defined in the superquery, otherwise returns an empty string.
JPQLQueryDeclaration.Type	getType()	Determines the type this declaration represents.

Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.resolver.AbstractRangeDeclaration

addJoin, getJoins, hasJoins

Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.resolver.Declaration

getBaseExpression, getDeclarationExpression, getIdentificationVariable, getRootPath, getVariableName, toString

Methods inherited from class java.lang.Object

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

Constructor Details

DerivedDeclaration

public DerivedDeclaration()

Creates a new DerivedDeclaration.

Method Details

getSuperqueryVariableName

public String getSuperqueryVariableName()

If CollectionMemberDeclaration.isDerived() is true, then returns the identification variable used in the derived path expression that is defined in the superquery, otherwise returns an empty string.

Returns:

The identification variable from the superquery if the root path is a derived path expression

getType

public JPQLQueryDeclaration.Type getType()

Description copied from interface: JPQLQueryDeclaration

Determines the type this declaration represents.

Returns:

One of the possible types