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

Class Declaration

java.lang.Object

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

All Implemented Interfaces:

JPQLQueryDeclaration

Direct Known Subclasses:

AbstractRangeDeclaration, CollectionDeclaration, SubqueryDeclaration, TableDeclaration, UnknownDeclaration

public abstract class Declaration
extends java.lang.Object
implements JPQLQueryDeclaration

The abstract definition of JPQLQueryDeclaration.

Version:

2.5

Author:

Pascal Filion

Since:

2.5

Nested Class Summary

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

JPQLQueryDeclaration.Type

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression	baseExpression Either the range variable declaration if this is a range declaration otherwise the collection-valued path expression when this is a collection member declaration.
protected Expression	declarationExpression The declaration expression, which is either an IdentificationVariableDeclaration or a CollectionMemberDeclaration when part of a FROM clause, otherwise it's either the DeleteClause or the UpdateClause.
protected IdentificationVariable	identificationVariable The identification variable used to declare the "root" object.
protected java.lang.String	rootPath The "root" object for objects which may not be reachable by navigation, it is either the abstract schema name (entity name), a derived path expression (which is only defined in a subquery) or null if this Declaration is a collection member declaration.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Declaration() Creates a new Declaration.

Method Summary

Modifier and Type	Method and Description
Expression	getBaseExpression() Returns the range variable declaration if this is a range declaration otherwise the collection-valued path expression when this is a collection member declaration.
Expression	getDeclarationExpression() Returns the declaration expression, which is either an IdentificationVariableDeclaration or a CollectionMemberDeclaration when part of a FROM clause, otherwise it's either the DeleteClause or the UpdateClause.
IdentificationVariable	getIdentificationVariable() Returns the IdentificationVariable used to declare the "root" object.
java.util.List<Join>	getJoins() Returns the JOIN expressions defined with this declaration, if supported.
java.lang.String	getRootPath() Returns the "root" object for objects which may not be reachable by navigation, it is either the abstract schema name (entity name), a derived path expression (which is only defined in a subquery) or null if this Declaration is a collection member declaration.
java.lang.String	getVariableName() Returns the identification variable name that is defining either the abstract schema name or the collection-valued path expression
boolean	hasJoins() Determines whether the declaration contains JOIN expressions.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.persistence.jpa.jpql.JPQLQueryDeclaration

getType

Field Detail

baseExpression

protected Expression baseExpression

Either the range variable declaration if this is a range declaration otherwise the collection-valued path expression when this is a collection member declaration.

declarationExpression

protected Expression declarationExpression

The declaration expression, which is either an IdentificationVariableDeclaration or a CollectionMemberDeclaration when part of a FROM clause, otherwise it's either the DeleteClause or the UpdateClause.

identificationVariable

protected IdentificationVariable identificationVariable

The identification variable used to declare the "root" object.

rootPath

protected java.lang.String rootPath

The "root" object for objects which may not be reachable by navigation, it is either the abstract schema name (entity name), a derived path expression (which is only defined in a subquery) or null if this Declaration is a collection member declaration.

Constructor Detail

Declaration

protected Declaration()

Creates a new Declaration.

Method Detail

getBaseExpression

public Expression getBaseExpression()

Returns the range variable declaration if this is a range declaration otherwise the collection-valued path expression when this is a collection member declaration.

Specified by:

getBaseExpression in interface JPQLQueryDeclaration

Returns:

Either the range variable declaration or the collection-valued path expression

getDeclarationExpression

public Expression getDeclarationExpression()

Returns the declaration expression, which is either an IdentificationVariableDeclaration or a CollectionMemberDeclaration when part of a FROM clause, otherwise it's either the DeleteClause or the UpdateClause.

Specified by:

getDeclarationExpression in interface JPQLQueryDeclaration

Returns:

The root of the declaration expression

getIdentificationVariable

public IdentificationVariable getIdentificationVariable()

Returns the IdentificationVariable used to declare the "root" object.

Returns:

The alias for the "root" object

getJoins

public java.util.List<Join> getJoins()

Returns the JOIN expressions defined with this declaration, if supported. The list contains the JOIN expressions in ordered they were declared.

Specified by:

getJoins in interface JPQLQueryDeclaration

Returns:

The JOIN expressions defined with this declaration or an empty list if this declaration does not support it

getRootPath

public java.lang.String getRootPath()

Returns the "root" object for objects which may not be reachable by navigation, it is either the abstract schema name (entity name), a derived path expression (which is only defined in a subquery) or null if this Declaration is a collection member declaration.

Returns:

The "root" object for objects which may not be reachable by navigation or null if this Declaration is a collection member declaration

getVariableName

public java.lang.String getVariableName()

Returns the identification variable name that is defining either the abstract schema name or the collection-valued path expression

Specified by:

getVariableName in interface JPQLQueryDeclaration

Returns:

The identification variable or an empty string if none was defined

hasJoins

public boolean hasJoins()

Determines whether the declaration contains JOIN expressions. This can be true only when JPQLQueryDeclaration.Type.isRange() returns true. A collection member declaration does not have JOIN expressions.

Specified by:

hasJoins in interface JPQLQueryDeclaration

Returns:

true if at least one JOIN expression was parsed; otherwise false

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object