Top Description Fields Constructors Methods
org.eclipse.persistence.jpa.jpql.tools.model.query

public Class TypeExpressionStateObject

extends AbstractSingleEncapsulatedExpressionStateObject
Class Inheritance
Imports
org.eclipse.persistence.jpa.jpql.parser.InternalEntityTypeExpressionBNF, .TypeExpression
An entity type expression can be used to restrict query polymorphism. The TYPE operator returns the exact type of the argument.

Part of JPA 2.0.

BNF: type_discriminator ::= TYPE(identification_variable | single_valued_object_path_expression | input_parameter)

Author
Pascal Filion
Since
2.4
Version
2.4
See Also
TypeExpression

Field Summary

Inherited from org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject:
STATE_OBJECT_PROPERTY

Constructor Summary

AccessConstructor and Description
public
TypeExpressionStateObject(StateObject
The parent of this state object, which cannot be null
parent)

Creates a new TypeExpressionStateObject.

public
TypeExpressionStateObject(StateObject
The parent of this state object, which cannot be null
parent, StateObject
The StateObject representing the encapsulated expression
stateObject)

Creates a new TypeExpressionStateObject.

public
TypeExpressionStateObject(StateObject
The parent of this state object, which cannot be null
parent, String
Either the identification variable, the singled-valued object path expression or the input parameter
path)

Creates a new TypeExpressionStateObject.

Method Summary

Modifier and TypeMethod and Description
public void
accept(StateObjectVisitor
The visitor to visit this object
visitor)

Implements org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject.accept.

Visits this StateObject by the given visitor.
public TypeExpression
getExpression()

Overrides org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.getExpression.

Implements org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject.getExpression.

Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.
public String
getIdentifier()

Implements abstract org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractEncapsulatedExpressionStateObject.getIdentifier.

Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject.
protected String
getQueryBNFId()

Implements abstract org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.getQueryBNFId.

Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression.
public void
setExpression(TypeExpression
The parsed object representing a TYPE expression
expression)

Keeps a reference of the parsed object object, which should only be done when this object is instantiated during the conversion of a parsed JPQL query into StateObjects.

public void
setStateObject(StateObject
The new encapsulated StateObject
stateObject)

Overrides org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.setStateObject.

Sets the given StateObject to represent the new encapsulated expression.
Inherited from org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject:
addChildrengetStateObjecthasStateObjectisEquivalentparsetoTextEncapsulatedExpression

Constructor Detail

TypeExpressionStateObjectback to summary
public TypeExpressionStateObject(StateObject parent)

Creates a new TypeExpressionStateObject.

Parameters
parent:StateObject

The parent of this state object, which cannot be null

Exceptions
NullPointerException:
The given parent cannot be null
TypeExpressionStateObjectback to summary
public TypeExpressionStateObject(StateObject parent, StateObject stateObject)

Creates a new TypeExpressionStateObject.

Parameters
parent:StateObject

The parent of this state object, which cannot be null

stateObject:StateObject

The StateObject representing the encapsulated expression

Exceptions
NullPointerException:
The given parent cannot be null
TypeExpressionStateObjectback to summary
public TypeExpressionStateObject(StateObject parent, String path)

Creates a new TypeExpressionStateObject.

Parameters
parent:StateObject

The parent of this state object, which cannot be null

path:String

Either the identification variable, the singled-valued object path expression or the input parameter

Exceptions
NullPointerException:
The given parent cannot be null

Method Detail

acceptback to summary
public void accept(StateObjectVisitor visitor)

Implements org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject.accept.

Doc from org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject.accept.

Visits this StateObject by the given visitor.

Parameters
visitor:StateObjectVisitor

The visitor to visit this object

Annotations
@Override
getExpressionback to summary
public TypeExpression getExpression()

Overrides org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.getExpression.

Implements org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject.getExpression.

Doc from org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject.getExpression.

Returns the actual parsed object if this StateObject representation of the JPQL query was created by parsing an existing JPQL query.

Returns:TypeExpression

The parsed object when a JPQL query is parsed and converted into a StateObject or null when the JPQL query is manually created (i.e. not from a string)

Annotations
@Override
getIdentifierback to summary
public String getIdentifier()

Implements abstract org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractEncapsulatedExpressionStateObject.getIdentifier.

Doc from org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractEncapsulatedExpressionStateObject.getIdentifier.

Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject.

Returns:String

The JPQL identifier that is shown before the left parenthesis

Annotations
@Override
getQueryBNFIdback to summary
protected String getQueryBNFId()

Implements abstract org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.getQueryBNFId.

Doc from org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.getQueryBNFId.

Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression.

Returns:String

The non-null ID of the BNF

Annotations
@Override
setExpressionback to summary
public void setExpression(TypeExpression expression)

Keeps a reference of the parsed object object, which should only be done when this object is instantiated during the conversion of a parsed JPQL query into StateObjects.

Parameters
expression:TypeExpression

The parsed object representing a TYPE expression

setStateObjectback to summary
public void setStateObject(StateObject stateObject)

Overrides org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.setStateObject.

Doc from org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractSingleEncapsulatedExpressionStateObject.setStateObject.

Sets the given StateObject to represent the new encapsulated expression.

Parameters
stateObject:StateObject

The new encapsulated StateObject

Annotations
@Override