本文整理了Java中javax.persistence.criteria.Predicate类的一些代码示例，展示了Predicate类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Predicate类的具体详情如下：
包路径：javax.persistence.criteria.Predicate
类名称：Predicate

Predicate介绍

[英]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.
[中]简单谓词或复合谓词的类型：限制的连接或分离。简单谓词被认为是带有单个连接词的连接词。

代码示例

代码示例来源：origin: hibernate/hibernate-orm

@Override
public Predicate isNotNull(Expression<?> x) {
  return isNull( x ).not();
}

代码示例来源：origin: Impetus/Kundera

List<Expression<Boolean>> expressions = where.getExpressions();
for (Expression expr : expressions)

代码示例来源：origin: FINRAOS/herd

@Test
public void testGetPredicateForInClauseTwoChunks()
{
  // Create the JPA builder, query, and entity root.
  CriteriaBuilder builder = entityManager.getCriteriaBuilder();
  CriteriaQuery<BusinessObjectDataEntity> criteria = builder.createQuery(BusinessObjectDataEntity.class);
  Root<BusinessObjectDataEntity> businessObjectDataEntity = criteria.from(BusinessObjectDataEntity.class);
  // Get the predicate for the "in" clause with 1001 values (1 greater than the default chunking size).
  Predicate predicate = baseJpaDaoImpl
    .getPredicateForInClause(builder, businessObjectDataEntity.get(BusinessObjectDataEntity_.partitionValue), getPartitionValueList(1001));
  // We expect to get back an "or" of 2 "in" expressions where each "in" expression is a list of chunked partition values.
  assertEquals(Predicate.BooleanOperator.OR, predicate.getOperator());
  List<Expression<Boolean>> expressions = predicate.getExpressions();
  assertEquals(2, expressions.size());
  // The first "in" clause will have the first 1000 elements and the second "in" clause will have the extra "1" element.
  assertEquals(1000, ((InPredicate) expressions.get(0)).getValues().size());
  assertEquals(1, ((InPredicate) expressions.get(1)).getValues().size());
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * Create a predicate testing for a false value.
 * 
 * @param x
 *            expression to be tested if false
 * @return predicate
 */
public Predicate isFalse(Expression<Boolean> x){
  if (((InternalExpression)x).isPredicate()){
    if (((InternalSelection)x).getCurrentNode() == null){
      if (((Predicate)x).getOperator() == BooleanOperator.AND){
        return (Predicate)x;
      }else{
        return this.conjunction();
      }
    }else{
      throw new IllegalArgumentException(ExceptionLocalization.buildMessage("PREDICATE_PASSED_TO_EVALUATION"));
    }
  }
  return new CompoundExpressionImpl(this.metamodel, ((InternalSelection)x).getCurrentNode().equal(false), buildList(x), "equals");
}

代码示例来源：origin: stackoverflow.com

private Specification<Event> buildSpecification(final EventFilter filter) {
   final Specification<Event> specification = new Specification<Event>() {
     @Override
     public Predicate toPredicate(Root<Event> root, CriteriaQuery<?> cq, CriteriaBuilder cb) {
       cq.distinct(true);
       Predicate predicate = cb.conjunction();
       if (filter.getEventGroupIds() != null) {
         Join<Event, EventGroup> join = root.join(Event_.eventGroups);
         predicate.getExpressions().add(join.get(EventGroup_.id).in(filter.getEventGroupIds()) );
       }
       return predicate;
     }
   };
   return specification;
 }

代码示例来源：origin: hibernate/hibernate-orm

@Override
public Predicate notLike(Expression<String> matchExpression, Expression<String> pattern, char escapeCharacter) {
  return like( matchExpression, pattern, escapeCharacter ).not();
}

代码示例来源：origin: dhis2/dhis2-core

@Override
public int count( DeletedObjectQuery query )
{
  CriteriaBuilder builder = getCurrentSession().getCriteriaBuilder();
  CriteriaQuery<Long> criteriaQuery = builder.createQuery( Long.class );
  Root<DeletedObject> root = criteriaQuery.from( DeletedObject.class );
  Predicate predicate = buildCriteria( builder, root, query );
  criteriaQuery.select( builder.countDistinct( root ) );
  if ( !predicate.getExpressions().isEmpty() ) criteriaQuery.where( predicate );
  Query<Long> typedQuery = getCurrentSession().createQuery( criteriaQuery );
  return typedQuery.getSingleResult().intValue();
}

代码示例来源：origin: hibernate/hibernate-orm

@Override
public Predicate notLike(Expression<String> matchExpression, String pattern, Expression<Character> escapeCharacter) {
  return like( matchExpression, pattern, escapeCharacter ).not();
}

代码示例来源：origin: dhis2/dhis2-core

disjunction.getExpressions().add( root.get( "uid" ).in( query.getUid() ) );
  disjunction.getExpressions().add( root.get( "code" ).in( query.getCode() ) );
if ( !disjunction.getExpressions().isEmpty() ) predicate.getExpressions().add( disjunction );
predicate.getExpressions().add( builder.or( root.get( "klass" ).in( query.getKlass() ),
  root.get( "klass" ).in( query.getKlass() ) ) );
  conjunction.getExpressions().add( root.get( "klass" ).in( query.getKlass() ) );
  conjunction.getExpressions().add( root.get( "uid" ).in( query.getUid() ) );
  disjunction.getExpressions().add( conjunction );
  conjunction.getExpressions().add( root.get( "klass" ).in( query.getKlass() ) );
  conjunction.getExpressions().add( root.get( "code" ).in( query.getUid() ) );
  disjunction.getExpressions().add( conjunction );
if ( !disjunction.getExpressions().isEmpty() ) predicate.getExpressions().add( disjunction );
predicate.getExpressions().add( builder.greaterThanOrEqualTo( root.get( "deletedAt" ), query.getDeletedAt() ) );

代码示例来源：origin: hibernate/hibernate-orm

@Override
public <C extends Collection<?>> Predicate isNotEmpty(Expression<C> collectionExpression) {
  return isEmpty( collectionExpression ).not();
}

代码示例来源：origin: stackoverflow.com

if(whereClause.getExpressions().isEmpty()) {
  throw new RuntimeException("no criteria");

代码示例来源：origin: hibernate/hibernate-orm

@Override
public Predicate not(Expression<Boolean> expression) {
  return wrap( expression ).not();
}

代码示例来源：origin: dhis2/dhis2-core

conjunction.getExpressions().add( predicate );

代码示例来源：origin: hibernate/hibernate-orm

@Override
public <E, C extends Collection<E>> Predicate isNotMember(E e, Expression<C> cExpression) {
  return isMember(e, cExpression).not();
}

代码示例来源：origin: dhis2/dhis2-core

@Override
public List<DeletedObject> query( DeletedObjectQuery query )
{
  CriteriaBuilder builder = getCurrentSession().getCriteriaBuilder();
  CriteriaQuery<DeletedObject> criteriaQuery = builder.createQuery( DeletedObject.class );
  Root<DeletedObject> root = criteriaQuery.from( DeletedObject.class );
  Predicate predicate = buildCriteria( builder, root, query );
  criteriaQuery.select( root );
  if ( !predicate.getExpressions().isEmpty() ) criteriaQuery.where( predicate );
  Query<DeletedObject> typedQuery = getCurrentSession().createQuery( criteriaQuery );
  if ( !query.isSkipPaging() )
  {
    Pager pager = query.getPager();
    typedQuery.setFirstResult( pager.getOffset() );
    typedQuery.setMaxResults( pager.getPageSize() );
  }
  return typedQuery.list();
}

代码示例来源：origin: hibernate/hibernate-orm

@Override
public <E, C extends Collection<E>> Predicate isNotMember(Expression<E> eExpression, Expression<C> cExpression) {
  return isMember(eExpression, cExpression).not();
}

代码示例来源：origin: org.picketlink/picketlink-idm-impl

conjunction.getExpressions().add(
    builder.or(builder.greaterThanOrEqualTo(root.<Date> get(expiryProperty.getName()), new Date()),
        builder.isNull(root.<Date> get(expiryProperty.getName()))));

代码示例来源：origin: hibernate/hibernate-orm

@Override
public <M extends Map<?, ?>> Predicate isMapNotEmpty(Expression<M> mapExpression) {
  return isMapEmpty( mapExpression ).not();
}

代码示例来源：origin: dhis2/dhis2-core

disjunction.getExpressions().add( root.get( "uid" ).in( query.getUid() ) );
disjunction.getExpressions().add( root.get( "code" ).in( query.getCode() ) );
disjunction.getExpressions().add( conjunction );
disjunction.getExpressions().add( conjunction );

代码示例来源：origin: hibernate/hibernate-orm

@Override
public Predicate notLike(Expression<String> matchExpression, Expression<String> pattern) {
  return like( matchExpression, pattern ).not();
}