程序包 org.hibernate.query.criteria.internal.predicate

类 NullnessPredicate

java.lang.Object

org.hibernate.query.criteria.internal.AbstractNode

org.hibernate.query.criteria.internal.expression.AbstractTupleElement<X>

org.hibernate.query.criteria.internal.expression.SelectionImpl<T>

org.hibernate.query.criteria.internal.expression.ExpressionImpl<Boolean>

org.hibernate.query.criteria.internal.predicate.AbstractPredicateImpl

org.hibernate.query.criteria.internal.predicate.AbstractSimplePredicate

org.hibernate.query.criteria.internal.predicate.NullnessPredicate

所有已实现的接口:

Serializable, javax.persistence.criteria.Expression<Boolean>, javax.persistence.criteria.Predicate, javax.persistence.criteria.Selection<Boolean>, javax.persistence.TupleElement<Boolean>, UnaryOperatorExpression<Boolean>, ExpressionImplementor<Boolean>, ParameterContainer, PredicateImplementor, Renderable, SelectionImplementor<Boolean>, TupleElementImplementor<Boolean>

public class NullnessPredicate
extends AbstractSimplePredicate
implements UnaryOperatorExpression<Boolean>, Serializable

Defines a Predicate for checking the nullness state of an expression, aka an IS [NOT] NULL predicate.

The NOT NULL form can be built by calling the constructor and then calling AbstractPredicateImpl.not().

作者:

Steve Ebersole

另请参阅:

序列化表格

嵌套类概要

从接口继承的嵌套类/接口 org.hibernate.query.criteria.internal.ParameterContainer

ParameterContainer.Helper

从接口继承的嵌套类/接口 javax.persistence.criteria.Predicate

javax.persistence.criteria.Predicate.BooleanOperator

构造器概要

构造器

构造器	说明
NullnessPredicate(CriteriaBuilderImpl criteriaBuilder, javax.persistence.criteria.Expression<?> operand)	Constructs the affirmative form of nullness checking (IS NULL).

方法概要

修饰符和类型	方法	说明
javax.persistence.criteria.Expression<?>	getOperand()	Get the operand.
void	registerParameters(ParameterRegistry registry)	Register any parameters contained within this query component with the given registry.
String	render(boolean isNegated, RenderingContext renderingContext)	Form of Renderable.render(org.hibernate.query.criteria.internal.compile.RenderingContext) used when the predicate is wrapped in a negated wrapper.

从类继承的方法 org.hibernate.query.criteria.internal.predicate.AbstractSimplePredicate

getExpressions, getOperator, isJunction, render

从类继承的方法 org.hibernate.query.criteria.internal.predicate.AbstractPredicateImpl

getCompoundSelectionItems, isCompoundSelection, isNegated, not

从类继承的方法 org.hibernate.query.criteria.internal.expression.ExpressionImpl

as, asBigDecimal, asBigInteger, asDouble, asFloat, asInteger, asLong, asString, in, in, in, in, isNotNull, isNull

从类继承的方法 org.hibernate.query.criteria.internal.expression.SelectionImpl

alias, getValueHandlers

从类继承的方法 org.hibernate.query.criteria.internal.expression.AbstractTupleElement

forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias

从类继承的方法 org.hibernate.query.criteria.internal.AbstractNode

criteriaBuilder

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 javax.persistence.criteria.Expression

as, in, in, in, in, isNotNull, isNull

从接口继承的方法 org.hibernate.query.criteria.internal.predicate.PredicateImplementor

criteriaBuilder

从接口继承的方法 javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

从接口继承的方法 org.hibernate.query.criteria.internal.SelectionImplementor

getValueHandlers

从接口继承的方法 javax.persistence.TupleElement

getAlias, getJavaType

从接口继承的方法 org.hibernate.query.criteria.internal.TupleElementImplementor

getValueHandler

构造器详细资料

NullnessPredicate

public NullnessPredicate(CriteriaBuilderImpl criteriaBuilder,
                         javax.persistence.criteria.Expression<?> operand)

Constructs the affirmative form of nullness checking (IS NULL). To construct the negative form (IS NOT NULL) call AbstractPredicateImpl.not() on the constructed instance.

参数:

criteriaBuilder - The query builder from whcih this originates.

operand - The expression to check.

方法详细资料

getOperand

public javax.persistence.criteria.Expression<?> getOperand()

从接口复制的说明: UnaryOperatorExpression

Get the operand.

指定者:

getOperand 在接口中 UnaryOperatorExpression<Boolean>

返回:

The operand.

registerParameters

public void registerParameters(ParameterRegistry registry)

从接口复制的说明: ParameterContainer

Register any parameters contained within this query component with the given registry.

指定者:

registerParameters 在接口中 ParameterContainer

参数:

registry - The parameter registry with which to register.

render

public String render(boolean isNegated,
                     RenderingContext renderingContext)

从接口复制的说明: PredicateImplementor

Form of Renderable.render(org.hibernate.query.criteria.internal.compile.RenderingContext) used when the predicate is wrapped in a negated wrapper. Allows passing down the negation flag.

Note that this form is no-op in compound (junction) predicates. The reason being that compound predicates are more complex and the negation is applied during its creation.

指定者:

render 在接口中 PredicateImplementor

参数:

isNegated - Should the predicate be negated.

renderingContext - The context for rendering

返回:

The rendered predicate fragment.