org.apache.openjpa.persistence.criteria
Class Expressions.IsNull
java.lang.Object
   org.apache.openjpa.persistence.criteria.SelectionImpl<X>
org.apache.openjpa.persistence.criteria.SelectionImpl<X>
       org.apache.openjpa.persistence.criteria.ExpressionImpl<Boolean>
org.apache.openjpa.persistence.criteria.ExpressionImpl<Boolean>
           org.apache.openjpa.persistence.criteria.PredicateImpl
org.apache.openjpa.persistence.criteria.PredicateImpl
               org.apache.openjpa.persistence.criteria.Expressions.IsNull
org.apache.openjpa.persistence.criteria.Expressions.IsNull
- All Implemented Interfaces: 
- Expression<Boolean>, Predicate, Selection<Boolean>, TupleElement<Boolean>, CriteriaExpression
- Enclosing class:
- Expressions
- public static class Expressions.IsNull 
- extends PredicateImpl
 
 
 
 
 
 
 
 
 
| Methods inherited from class org.apache.openjpa.persistence.criteria.SelectionImpl | 
| alias, asProjection, assertValidName, asVariable, getAlias, getCompoundSelectionItems, getJavaType, isAliased, isAutoAliased, isCompoundSelection, setAutoAlias | 
 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
 
 
 
 
e
final ExpressionImpl<?> e
Expressions.IsNull
public Expressions.IsNull(ExpressionImpl<?> e)
not
public PredicateImpl not()
- Description copied from class: PredicateImpl
- Returns a new predicate as the negation of this predicate. 
 
 Note:
 Default negation creates a Not expression with this receiver as delegate.
 Derived predicates can return the inverse expression, if exists.
 For example, NotEqual for Equal or LessThan for GreaterThanEqual etc.
 
- 
- Specified by:
- notin interface- Predicate
- Overrides:
- notin class- PredicateImpl
 
- 
 
toKernelExpression
Expression toKernelExpression(ExpressionFactory factory,
                              CriteriaQueryImpl<?> q)
- Description copied from class: ExpressionImpl
- Bridge contract to convert this facade expression to a kernel expression.
 
- 
- Overrides:
- toKernelExpressionin class- PredicateImpl
 
- 
- Parameters:
- factory- creates the kernel expression
- q- the query definition context of this expression
- Returns:
- an equivalent kernel expression
 
acceptVisit
public void acceptVisit(CriteriaExpressionVisitor visitor)
- Description copied from interface: CriteriaExpression
- Accept visit from the given visitor. The receiver is responsible 
 to propagate the visitor to the constituent sub-nodes if any.
 
- 
- Specified by:
- acceptVisitin interface- CriteriaExpression
- Overrides:
- acceptVisitin class- PredicateImpl
 
- 
- Parameters:
- visitor- a processor to walk the nodes of a tree.
 
asValue
public StringBuilder asValue(AliasContext q)
- Description copied from interface: CriteriaExpression
- Get a string representation of this node as a value in the context of the given query.
 
- 
- Specified by:
- asValuein interface- CriteriaExpression
- Overrides:
- asValuein class- PredicateImpl
 
- 
 
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