Predicate (Java EE 8)

All Superinterfaces:

Expression<java.lang.Boolean>, Selection<java.lang.Boolean>, TupleElement<java.lang.Boolean>

All Known Subinterfaces:

CriteriaBuilder.In<T>
```
public interface Predicate
extends Expression<java.lang.Boolean>
```
The type of a simple or compound predicate: a conjunction or disjunction of restrictions. A simple predicate is considered to be a conjunction with a single conjunct.

Since:

Java Persistence 2.0

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class Predicate.BooleanOperator

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.List<Expression<java.lang.Boolean>>`	`getExpressions()`	Return the top-level conjuncts or disjuncts of the predicate.
`Predicate.BooleanOperator`	`getOperator()`	Return the boolean operator for the predicate.
`boolean`	`isNegated()`	Whether the predicate has been created from another predicate by applying the `Predicate.not()` method or the `CriteriaBuilder.not()` method.
`Predicate`	`not()`	Create a negation of the predicate.

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

Methods inherited from interface javax.persistence.criteria.Selection
alias, getCompoundSelectionItems, isCompoundSelection

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

- Method Detail
  - getOperator
```
Predicate.BooleanOperator getOperator()
```
    Return the boolean operator for the predicate. If the predicate is simple, this is AND.
    
    Returns:
    
    boolean operator for the predicate
  - isNegated
```
boolean isNegated()
```
    Whether the predicate has been created from another predicate by applying the Predicate.not() method or the CriteriaBuilder.not() method.
    
    Returns:
    
    boolean indicating if the predicate is a negated predicate
  - getExpressions
```
java.util.List<Expression<java.lang.Boolean>> getExpressions()
```
    Return the top-level conjuncts or disjuncts of the predicate. Returns empty list if there are no top-level conjuncts or disjuncts of the predicate. Modifications to the list do not affect the query.
    
    Returns:
    
    list of boolean expressions forming the predicate
  - not
```
Predicate not()
```
    Create a negation of the predicate.
    
    Returns:
    
    negated predicate