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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.EncapsulatedIdentificationVariableExpressionStateObject
org.eclipse.persistence.jpa.jpql.model.query.IndexExpressionStateObject
public class IndexExpressionStateObject
The INDEX
function returns an integer value corresponding to the position of
its argument in an ordered list. The INDEX
function can only be applied to
identification variables denoting types for which an order column has been specified.
expression ::= INDEX(identification_variable)
IndexExpression
Field Summary |
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Fields inherited from class org.eclipse.persistence.jpa.jpql.model.query.EncapsulatedIdentificationVariableExpressionStateObject |
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IDENTIFICATION_VARIABLE_PROPERTY |
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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IndexExpressionStateObject(StateObject parent)
Creates a new IndexExpressionStateObject . |
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IndexExpressionStateObject(StateObject parent,
java.lang.String identificationVariable)
Creates a new IndexExpressionStateObject . |
Method Summary | |
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void |
accept(StateObjectVisitor visitor)
Visits this StateObject by the given visitor . |
IndexExpression |
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 . |
void |
setExpression(IndexExpression 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 . |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.EncapsulatedIdentificationVariableExpressionStateObject |
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checkIntegrity, clearResolvedObjects, getIdentificationVariable, getManagedType, getQueryBNFId, getStateObject, getType, getTypeDeclaration, hasIdentificationVariable, initialize, resolveManagedType, resolveType, resolveTypeDeclaration, setIdentificationVariable |
Methods inherited from class org.eclipse.persistence.jpa.jpql.model.query.AbstractSingleEncapsulatedExpressionStateObject |
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addChildren, hasStateObject, isEquivalent, parse, setStateObject, 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, 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 IndexExpressionStateObject(StateObject parent)
IndexExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
java.lang.NullPointerException
- The given parent cannot be null
public IndexExpressionStateObject(StateObject parent, java.lang.String identificationVariable)
IndexExpressionStateObject
.
parent
- The parent of this state object, which cannot be null
identificationVariable
- The name of the identification variable
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 IndexExpression getExpression()
StateObject
representation of the JPQL query
was created by parsing an existing JPQL query.
getExpression
in interface StateObject
getExpression
in class EncapsulatedIdentificationVariableExpressionStateObject
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
public void setExpression(IndexExpression 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 an INDEX
expression
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