本文整理了Java中javax.persistence.criteria.Root.getJavaType方法的一些代码示例，展示了Root.getJavaType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。Root.getJavaType方法的具体详情如下：
包路径：javax.persistence.criteria.Root
类名称：Root
方法名：getJavaType

Root.getJavaType介绍

暂无

代码示例

代码示例来源：origin: kiegroup/jbpm

/**
 * This is a helper method to retrieve a particular {@link Root} from a {@link CriteriaQuery} instance
 *
 * @param query The {@link CriteriaQuery} instance that we're building
 * @param queryType The {@link Class} matching the {@link Root} we want
 * @return The {@link Root} matching the given {@link Class} or null if it's not in the query
 */
public static <T> Root getRoot(AbstractQuery<T> query, Class queryType) {
  Root<?> table = null;
  for( Root<?> root : query.getRoots() ) {
    if( root.getJavaType().equals(queryType) )  {
      table = root;
      break;
    }
  }
  return table;
}

代码示例来源：origin: kiegroup/jbpm

} else { 
  throw new IllegalStateException("List id [" + getQueryParameterIdNameMap().get(Integer.parseInt(criteria.getListId())) 
      + "] is not supported for queries on " + table.getJavaType().getSimpleName() + ".");

代码示例来源：origin: kiegroup/jbpm

@Override
protected <T> Expression getEntityField(CriteriaQuery<T> query, String listId, Attribute attr) {
  if( attr == null ) {
    return null;
  }
  Root<TaskImpl> taskRoot = null;
  Join<TaskImpl, TaskDataImpl> taskDataJoin = null;
  Join<TaskImpl, PeopleAssignmentsImpl> peopAssignJoin = null;
  for( Root root : query.getRoots() ) {
    if( TaskImpl.class.equals(root.getJavaType()) ) {
      taskRoot = (Root<TaskImpl>) root;
      for( Join<TaskImpl, ?> join : taskRoot.getJoins() ) {
       if( TaskDataImpl.class.equals(join.getJavaType()) ) {
         taskDataJoin = (Join<TaskImpl, TaskDataImpl>) join;
       } else if( PeopleAssignmentsImpl.class.equals(join.getJavaType()) )  {
         peopAssignJoin = (Join<TaskImpl, PeopleAssignmentsImpl>) join;
       }
      }
    }
  }
  assert taskRoot != null : "Unable to find TaskImpl Root in query!";
  if( taskDataJoin == null ) {
    taskDataJoin = taskRoot.join(TaskImpl_.taskData);
  }
  assert taskDataJoin != null : "Unable to find TaskDataImpl Join in query!";
  return taskImplSpecificGetEntityField(query, taskRoot,
      taskDataJoin, peopAssignJoin,
      listId, attr);
}

代码示例来源：origin: kiegroup/jbpm

private <T> void useDistinctWhenLefOuterJoinsPresent(CriteriaQuery<T> criteriaQuery) {
  boolean useDistinct = false;
  Root<TaskImpl> taskRoot = null;
  ROOTS_FOR: for( Root root : criteriaQuery.getRoots() ) {
    if( TaskImpl.class.equals(root.getJavaType()) ) {
      taskRoot = (Root<TaskImpl>) root;
      for( Join<TaskImpl, ?> taskJoin : taskRoot.getJoins() ) {
       if( PeopleAssignmentsImpl.class.equals(taskJoin.getJavaType()) )  {
         Join<TaskImpl, PeopleAssignmentsImpl> peopleAssignJoin = (Join<TaskImpl, PeopleAssignmentsImpl>) taskJoin;
         if( JoinType.LEFT.equals(peopleAssignJoin.getJoinType()) ) {
           useDistinct = true;
           break ROOTS_FOR;
         }
         for( Join peopleAssignJoinJoin : peopleAssignJoin.getJoins() ) {
           if( JoinType.LEFT.equals(peopleAssignJoinJoin.getJoinType()) ) {
             useDistinct = true;
             break ROOTS_FOR;
           }
         }
       }
      }
    }
  }
  if( useDistinct ) {
    criteriaQuery.distinct(true);
  }
}

代码示例来源：origin: Impetus/Kundera

Class entityClazz = from.getJavaType();

代码示例来源：origin: org.omnifaces/omnipersistence

@Override
public Class<? extends X> getJavaType() {
  return getWrapped().getJavaType();
}

代码示例来源：origin: com.charlyghislain.authenticator/authenticator-ejb

private static <T extends WithId> Root<T> getMainSelection(CriteriaQuery<T> query) {
  return query.getRoots().stream()
      .filter(r -> r.getJavaType().isAssignableFrom(query.getResultType()))
      .map(r -> (Root<T>) r)
      .filter(r -> !r.isCorrelated())
      .findFirst()
      .orElseThrow(IllegalStateException::new);
}

代码示例来源：origin: ZhongjunTian/spring-repository-plus

private void join(Root<Object> root, List<String> joinFetchTables, JoinType type) {
  if (joinFetchTables != null && (joinFetchTables.size() > 0)) {
    logger.debug("{} join root {} with table {}",
        type.name(), root.getJavaType(), joinFetchTables);
    for (String table : joinFetchTables) {
      if (table != null)
        root.fetch(table, type);
    }
  }
}

代码示例来源：origin: org.ligoj.bootstrap/bootstrap-business

/**
 * Return the ORM path from the given rule.
 */
private <T> Path<T> getOrmPath(final Root<U> root, final BasicRule rule) {
  final String path = mapping.getOrDefault(rule.getField(), mapping.containsKey("*") ? rule.getField() : null);
  if (path == null) {
    // Invalid path, coding issue or SQL injection attempt
    log.error(String.format("Non mapped property '%s' found for entity class '%s'", rule.getField(), root.getJavaType().getName()));
    return null;
  }
  return getOrmPath(root, path);
}

代码示例来源：origin: org.jboss.pressgang.ccms/pressgang-ccms-query

/**
 * Find the Root with type class on CriteriaQuery Root Set
 *
 * @param <T>   root type
 * @param query criteria query
 * @param clazz root type
 * @return Root<T> of null if none
 */
public static <T> Root<T> findRoot(CriteriaQuery<?> query, Class<T> clazz) {
  for (Root<?> r : query.getRoots()) {
    if (clazz.equals(r.getJavaType())) {
      return (Root<T>) r.as(clazz);
    }
  }
  return null;
}

代码示例来源：origin: jaxio/jpa-query-by-example

private <T> Predicate onSimplePrimaryKey(Root<T> root, CriteriaBuilder builder, SearchParameters sp, List<SingularAttribute<?, ?>> properties) {
  List<Serializable> ids = hibernateSearchUtil.findId(root.getJavaType(), sp, properties);
  if (ids == null) {
    return null;
  } else if (ids.isEmpty()) {
    return builder.disjunction();
  }
  return jpaUtil.concatPredicate(sp, builder, root.get("id").in(ids));
}

代码示例来源：origin: jaxio/generated-projects

private <T> Predicate onSimplePrimaryKey(Root<T> root, CriteriaBuilder builder, SearchParameters sp, List<SingularAttribute<?, ?>> properties) {
  List<Serializable> ids = hibernateSearchUtil.findId(root.getJavaType(), sp, properties);
  if (ids == null) {
    return null;
  } else if (ids.isEmpty()) {
    return builder.disjunction();
  }
  return jpaUtil.concatPredicate(sp, builder, root.get("id").in(ids));
}

代码示例来源：origin: jaxio/generated-projects

private <T extends Identifiable<?>> Predicate onCompositePrimaryKeys(Root<T> root, CriteriaBuilder builder, SearchParameters sp,
    List<SingularAttribute<?, ?>> properties) {
  List<? extends T> found = hibernateSearchUtil.find(root.getJavaType(), sp, properties);
  if (found == null) {
    return null;
  } else if (found.isEmpty()) {
    return builder.disjunction();
  }
  List<Predicate> predicates = newArrayList();
  for (T t : found) {
    predicates.add(byExampleOnEntity(root, t, sp, builder));
  }
  return jpaUtil.concatPredicate(sp, builder, jpaUtil.orPredicate(builder, predicates));
}

代码示例来源：origin: jaxio/jpa-query-by-example

private <T extends Identifiable<?>> Predicate onCompositePrimaryKeys(Root<T> root, CriteriaBuilder builder, SearchParameters sp,
                                   List<SingularAttribute<?, ?>> properties) {
  List<? extends T> found = hibernateSearchUtil.find(root.getJavaType(), sp, properties);
  if (found == null) {
    return null;
  } else if (found.isEmpty()) {
    return builder.disjunction();
  }
  List<Predicate> predicates = newArrayList();
  for (T t : found) {
    predicates.add(byExampleOnEntity(root, t, sp, builder));
  }
  return jpaUtil.concatPredicate(sp, builder, jpaUtil.orPredicate(builder, predicates));
}

代码示例来源：origin: org.apache.openjpa/openjpa-persistence

public void populate(Object parsed, ExpressionStoreQuery query) {
  CriteriaQueryImpl<?> c = (CriteriaQueryImpl<?>) parsed;
  query.invalidateCompilation();
  query.getContext().setCandidateType(c.getRoot().getJavaType(), true);
  query.setQuery(parsed);
}

代码示例来源：origin: org.apache.openejb.patch/openjpa-persistence

public void populate(Object parsed, ExpressionStoreQuery query) {
  CriteriaQueryImpl<?> c = (CriteriaQueryImpl<?>) parsed;
  query.invalidateCompilation();
  query.getContext().setCandidateType(c.getRoot().getJavaType(), true);
  query.setQuery(parsed);
}

代码示例来源：origin: org.apache.openejb.patch/openjpa

public void populate(Object parsed, ExpressionStoreQuery query) {
  CriteriaQueryImpl<?> c = (CriteriaQueryImpl<?>) parsed;
  query.invalidateCompilation();
  query.getContext().setCandidateType(c.getRoot().getJavaType(), true);
  query.setQuery(parsed);
}

代码示例来源：origin: org.apache.openjpa/openjpa-all

public void populate(Object parsed, ExpressionStoreQuery query) {
  CriteriaQueryImpl<?> c = (CriteriaQueryImpl<?>) parsed;
  query.invalidateCompilation();
  query.getContext().setCandidateType(c.getRoot().getJavaType(), true);
  query.setQuery(parsed);
}

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

/**
 * Correlates a root of the enclosing query to a root of the subquery and
 * returns the subquery root.
 * 
 * @param parentRoot
 *            a root of the containing query
 * @return subquery root
 */
public <Y> Root<Y> correlate(Root<Y> parentRoot){
  RootImpl root = new RootImpl(parentRoot.getModel(), metamodel, parentRoot.getJavaType(), internalCorrelate((FromImpl)parentRoot), parentRoot.getModel(), (FromImpl) parentRoot);
  integrateRoot(root);
  return root;
}

代码示例来源：origin: org.jboss.pressgang.ccms/pressgang-ccms-query

/**
 * Copy Criteria without Selection
 *
 * @param from source Criteria
 * @param to   destination Criteria
 */
public static void copyCriteriaNoSelection(CriteriaQuery<?> from, CriteriaQuery<?> to) {
  // Copy Roots
  for (Root<?> root : from.getRoots()) {
    Root<?> dest = to.from(root.getJavaType());
    dest.alias(getOrCreateAlias(root));
    copyJoins(root, dest);
  }
  if (from.getGroupList() != null) to.groupBy(from.getGroupList());
  to.distinct(from.isDistinct());
  if (from.getGroupRestriction() != null) to.having(from.getGroupRestriction());
  if (from.getRestriction() != null) to.where(from.getRestriction());
  if (from.getOrderList() != null) to.orderBy(from.getOrderList());
}