ExplicitTruthValueCheck (Hibernate JavaDocs)
Date: 2012-04-05

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## org.hibernate.ejb.criteria.predicate
Class ExplicitTruthValueCheck

    java.lang.Object
      org.hibernate.ejb.criteria.AbstractNode
          org.hibernate.ejb.criteria.expression.AbstractTupleElement<X>
              org.hibernate.ejb.criteria.expression.SelectionImpl<T>
                  org.hibernate.ejb.criteria.expression.ExpressionImpl<Boolean>
                      org.hibernate.ejb.criteria.predicate.AbstractPredicateImpl
                          org.hibernate.ejb.criteria.predicate.AbstractSimplePredicate
                              org.hibernate.ejb.criteria.predicate.ExplicitTruthValueCheck

All Implemented Interfaces:
  Serializable, Expression<Boolean>, Predicate, Selection<Boolean>, TupleElement<Boolean>, ExpressionImplementor<Boolean>, ParameterContainer, Renderable, SelectionImplementor<Boolean>, TupleElementImplementor<Boolean>

    public class ExplicitTruthValueCheck

extends AbstractSimplePredicate
implements Serializable

ANSI-SQL defines `TRUE`, `FALSE` and `UNKNOWN` as truth values. These truth values are used to explicitly check the result of a boolean expression (the syntax is like `a > b IS TRUE`. `IS TRUE` is the assumed default.

JPA defines support for only `IS TRUE` and `IS FALSE`, not `IS UNKNOWN` (`a > NULL` is an example where the result would be UNKNOWN.

See Also:
  Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface javax.persistence.criteria.Predicate
`Predicate.BooleanOperator`

Nested classes/interfaces inherited from interface org.hibernate.ejb.criteria.ParameterContainer
`ParameterContainer.Helper`

Constructor Summary
`ExplicitTruthValueCheck(CriteriaBuilderImpl criteriaBuilder, Expression<Boolean> booleanExpression, TruthValue truthValue)`

Method Summary
`Expression<Boolean>` | `getBooleanExpression()`
`TruthValue` | `getTruthValue()`
`void` | `registerParameters(ParameterRegistry registry)` Register any parameters contained within this query component with the given registry.
`String` | `render(CriteriaQueryCompiler.RenderingContext renderingContext)`
`String` | `renderProjection(CriteriaQueryCompiler.RenderingContext renderingContext)`

Methods inherited from class org.hibernate.ejb.criteria.predicate.AbstractSimplePredicate
`getExpressions, getOperator`

Methods inherited from class org.hibernate.ejb.criteria.predicate.AbstractPredicateImpl
`getCompoundSelectionItems, isCompoundSelection, isNegated, not`

Methods inherited from class org.hibernate.ejb.criteria.expression.ExpressionImpl
`as, asBigDecimal, asBigInteger, asDouble, asFloat, asInteger, asLong, asString, in, in, in, in, isNotNull, isNull`

Methods inherited from class org.hibernate.ejb.criteria.expression.SelectionImpl
`alias, getValueHandlers`

Methods inherited from class org.hibernate.ejb.criteria.expression.AbstractTupleElement
`forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias`

Methods inherited from class org.hibernate.ejb.criteria.AbstractNode
`criteriaBuilder`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface javax.persistence.criteria.Expression
`as, in, in, in, in, isNotNull, isNull`

Methods inherited from interface javax.persistence.criteria.Selection
`alias`

Methods inherited from interface javax.persistence.TupleElement
`getAlias, getJavaType`

Methods inherited from interface org.hibernate.ejb.criteria.SelectionImplementor
`getValueHandlers`

Methods inherited from interface org.hibernate.ejb.criteria.TupleElementImplementor
`getValueHandler`

Constructor Detail

### ExplicitTruthValueCheck

    public ExplicitTruthValueCheck(CriteriaBuilderImpl criteriaBuilder,
                                   Expression<Boolean> booleanExpression,
                                   TruthValue truthValue)

Method Detail

### getBooleanExpression

    public Expression<Boolean> getBooleanExpression()

### getTruthValue

    public TruthValue getTruthValue()

### registerParameters

    public void registerParameters(ParameterRegistry registry)

  Description copied from interface: `ParameterContainer`
  Register any parameters contained within this query component with the given registry.

  Specified by:
    `registerParameters` in interface `ParameterContainer`
  Parameters:
    `registry` - The parameter registry with which to register.

### render

    public String render(CriteriaQueryCompiler.RenderingContext renderingContext)

  Specified by:
    `render` in interface `Renderable`

### renderProjection

    public String renderProjection(CriteriaQueryCompiler.RenderingContext renderingContext)

  Specified by:
    `renderProjection` in interface `Renderable`

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