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EclipseLink 2.4.1, build 'v20121003-ad44345' 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. |
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| 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 nullpublic TypeExpressionStateObject(StateObject parent, StateObject stateObject)
TypeExpressionStateObject.
parent - The parent of this state object, which cannot be nullstateObject - The StateObject representing the encapsulated expression
java.lang.NullPointerException - The given parent cannot be nullpublic TypeExpressionStateObject(StateObject parent, java.lang.String path)
TypeExpressionStateObject.
parent - The parent of this state object, which cannot be nullpath - 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 StateObjectgetExpression in class AbstractSingleEncapsulatedExpressionStateObjectStateObject
or null when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
AbstractSingleEncapsulatedExpressionStateObject.
getIdentifier in class AbstractEncapsulatedExpressionStateObjectprotected java.lang.String getQueryBNFId()
JPQLQueryBNF that will determine how to parse the encapsulated expression.
getQueryBNFId in class AbstractSingleEncapsulatedExpressionStateObjectnull 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 AbstractSingleEncapsulatedExpressionStateObjectstateObject - The new encapsulated StateObject
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