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EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
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java.lang.Objectorg.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject
org.eclipse.persistence.jpa.jpql.model.query.AbstractEncapsulatedExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.TypeExpressionStateObject
public class TypeExpressionStateObject
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.
type_discriminator ::= TYPE(identification_variable |
single_valued_object_path_expression |
input_parameter)
TypeExpression
Field Summary |
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Fields inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
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STATE_OBJECT_PROPERTY |
Constructor Summary | |
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TypeExpressionStateObject(StateObject parent)
Creates a new TypeExpressionStateObject . |
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TypeExpressionStateObject(StateObject parent,
StateObject stateObject)
Creates a new TypeExpressionStateObject . |
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TypeExpressionStateObject(StateObject parent,
java.lang.String path)
Creates a new TypeExpressionStateObject . |
Method Summary | |
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void |
accept(StateObjectVisitor visitor)
Visits this StateObject by the given visitor . |
TypeExpression |
getExpression()
Returns the actual parsed object if this StateObject representation of the JPQL query
was created by parsing an existing JPQL query. |
java.lang.String |
getIdentifier()
Returns the JPQL identifier of the expression represented by this AbstractSingleEncapsulatedExpressionStateObject . |
protected java.lang.String |
getQueryBNFId()
Returns the unique identifier of the JPQLQueryBNF that will determine how to parse the encapsulated expression. |
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 . |
void |
setStateObject(StateObject stateObject)
Sets the given StateObject to represent the new encapsulated expression. |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
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addChildren, getStateObject, hasStateObject, isEquivalent, parse, toTextEncapsulatedExpression |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractEncapsulatedExpressionStateObject |
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toTextInternal |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractStateObject |
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acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, initialize, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public TypeExpressionStateObject(StateObject parent)
TypeExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
java.lang.NullPointerException
- The given parent cannot be null
public TypeExpressionStateObject(StateObject parent, StateObject stateObject)
TypeExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
stateObject
- The StateObject
representing the encapsulated expression
java.lang.NullPointerException
- The given parent cannot be null
public TypeExpressionStateObject(StateObject parent, java.lang.String path)
TypeExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
path
- Either the identification variable, the singled-valued object path expression or
the input parameter
java.lang.NullPointerException
- The given parent cannot be null
Method Detail |
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public void accept(StateObjectVisitor visitor)
StateObject
by the given visitor
.
visitor
- The visitor
to visit this objectpublic TypeExpression getExpression()
StateObject
representation of the JPQL query
was created by parsing an existing JPQL query.
getExpression
in interface StateObject
getExpression
in class AbstractSingleEncapsulatedExpressionStateObject
StateObject
or null
when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
AbstractSingleEncapsulatedExpressionStateObject
.
getIdentifier
in class AbstractEncapsulatedExpressionStateObject
protected java.lang.String getQueryBNFId()
JPQLQueryBNF
that will determine how to parse the encapsulated expression.
getQueryBNFId
in class AbstractSingleEncapsulatedExpressionStateObject
null
ID of the BNFpublic void setExpression(TypeExpression expression)
parsed object
object, which should only be
done when this object is instantiated during the conversion of a parsed JPQL query into
StateObjects
.
expression
- The parsed object
representing a TYPE
expressionpublic void setStateObject(StateObject stateObject)
StateObject
to represent the new encapsulated expression.
setStateObject
in class AbstractSingleEncapsulatedExpressionStateObject
stateObject
- The new encapsulated StateObject
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