javax.persistence.criteria.Root.getFetches()方法的使用及代码示例

x33g5p2x  于2022-01-28 转载在 其他  
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本文整理了Java中javax.persistence.criteria.Root.getFetches方法的一些代码示例，展示了Root.getFetches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.getFetches方法的具体详情如下：
包路径：javax.persistence.criteria.Root
类名称：Root
方法名：getFetches

Root.getFetches介绍

暂无

代码示例

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

renderFetches( jpaqlQuery, renderingContext, root.getFetches() );

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

@Override
public Set<Fetch<X, ?>> getFetches() {
  return getWrapped().getFetches();
}

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

protected void evalFetchJoin(QueryExpressions exps, ExpressionFactory factory, CriteriaQueryImpl<?> q) {
  List<String> iPaths = new ArrayList<String>();
  List<String> oPaths = new ArrayList<String>();
  Set<Root<?>> roots = q.getRoots();
  for (Root root : roots) {
    Set<Fetch> fetches = root.getFetches();
    if (fetches == null)
      continue;
    for (Fetch<?,?> fetch : fetches) {
      String fPath = ((Members.Member<?, ?>)fetch.getAttribute()).fmd.getFullName(false);
      oPaths.add(fPath);
      if (fetch.getJoinType() == JoinType.INNER) {
        iPaths.add(fPath);
      } 
    }
  }
  if (!iPaths.isEmpty()) {
    exps.fetchInnerPaths = iPaths.toArray(new String[iPaths.size()]);
  }
  if (!oPaths.isEmpty()) {
    exps.fetchPaths = oPaths.toArray(new String[oPaths.size()]);
  }
}

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

private void renderRoots(StringBuilder buffer, Collection<Root<?>> roots) {
  if (roots == null) return;
  int i = 0;
  for (Root r : roots) {
    buffer.append(((ExpressionImpl<?>)r).asVariable(this));
    if (++i != roots.size()) buffer.append(", ");
    renderJoins(buffer, r.getJoins());
    renderFetches(buffer, r.getFetches());
  }
}
private void renderFetches(StringBuilder buffer, Set<Fetch> fetches) {

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

protected void evalFetchJoin(QueryExpressions exps, ExpressionFactory factory, CriteriaQueryImpl<?> q) {
  List<String> iPaths = new ArrayList<String>();
  List<String> oPaths = new ArrayList<String>();
  Set<Root<?>> roots = q.getRoots();
  for (Root root : roots) {
    Set<Fetch> fetches = root.getFetches();
    if (fetches == null)
      continue;
    for (Fetch<?,?> fetch : fetches) {
      String fPath = ((Members.Member<?, ?>)fetch.getAttribute()).fmd.getFullName(false);
      oPaths.add(fPath);
      if (fetch.getJoinType() == JoinType.INNER) {
        iPaths.add(fPath);
      } 
    }
  }
  if (!iPaths.isEmpty()) {
    exps.fetchInnerPaths = iPaths.toArray(new String[iPaths.size()]);
  }
  if (!oPaths.isEmpty()) {
    exps.fetchPaths = oPaths.toArray(new String[oPaths.size()]);
  }
}

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

protected void evalFetchJoin(QueryExpressions exps, ExpressionFactory factory, CriteriaQueryImpl<?> q) {
  List<String> iPaths = new ArrayList<String>();
  List<String> oPaths = new ArrayList<String>();
  Set<Root<?>> roots = q.getRoots();
  for (Root root : roots) {
    Set<Fetch> fetches = root.getFetches();
    if (fetches == null)
      continue;
    for (Fetch<?,?> fetch : fetches) {
      String fPath = ((Members.Member<?, ?>)fetch.getAttribute()).fmd.getFullName(false);
      oPaths.add(fPath);
      if (fetch.getJoinType() == JoinType.INNER) {
        iPaths.add(fPath);
      } 
    }
  }
  if (!iPaths.isEmpty()) {
    exps.fetchInnerPaths = iPaths.toArray(new String[iPaths.size()]);
  }
  if (!oPaths.isEmpty()) {
    exps.fetchPaths = oPaths.toArray(new String[oPaths.size()]);
  }
}

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

private void renderRoots(StringBuilder buffer, Collection<Root<?>> roots) {
  if (roots == null) return;
  int i = 0;
  for (Root r : roots) {
    buffer.append(((ExpressionImpl<?>)r).asVariable(this));
    if (++i != roots.size()) buffer.append(", ");
    renderJoins(buffer, r.getJoins());
    renderFetches(buffer, r.getFetches());
  }
}
private void renderFetches(StringBuilder buffer, Set<Fetch> fetches) {

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

private void renderRoots(StringBuilder buffer, Collection<Root<?>> roots) {
  if (roots == null) return;
  int i = 0;
  for (Root r : roots) {
    buffer.append(((ExpressionImpl<?>)r).asVariable(this));
    if (++i != roots.size()) buffer.append(", ");
    renderJoins(buffer, r.getJoins());
    renderFetches(buffer, r.getFetches());
  }
}
private void renderFetches(StringBuilder buffer, Set<Fetch> fetches) {

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

private void renderRoots(StringBuilder buffer, Collection<Root<?>> roots) {
  if (roots == null) return;
  int i = 0;
  for (Root r : roots) {
    buffer.append(((ExpressionImpl<?>)r).asVariable(this));
    if (++i != roots.size()) buffer.append(", ");
    renderJoins(buffer, r.getJoins());
    renderFetches(buffer, r.getFetches());
  }
}
private void renderFetches(StringBuilder buffer, Set<Fetch> fetches) {

代码示例来源：origin: br.eti.clairton/repository

public Long count(final Boolean distinct) {
  final Expression<?> from = selections.isEmpty() ? this.from : (Expression<?>) selections.get(0);
  @SuppressWarnings("unchecked")
  final Set<Fetch<?, ?>> fetches = (Set<Fetch<?, ?>>)((Set<?>) this.from.getFetches()); 
  fetchToJoin(this.from, fetches);
  final Expression<?> s;
  if (distinct) {
    s = builder.countDistinct(from);
  } else {
    s = builder.count(from);
  }
  final List<Expression<?>> selections = new ArrayList<>(); 
  selections.add(s);
  final TypedQuery<Long> query = query(selections, criteriaQuery, predicates, new ArrayList<javax.persistence.criteria.Order>());
  final Long count = (Long) query.getResultList().get(0);		
  filtersClears();
  return count;
}

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

protected void evalFetchJoin(QueryExpressions exps, ExpressionFactory factory, CriteriaQueryImpl<?> q) {
  List<String> iPaths = new ArrayList<String>();
  List<String> oPaths = new ArrayList<String>();
  Set<Root<?>> roots = q.getRoots();
  for (Root root : roots) {
    Set<Fetch> fetches = root.getFetches();
    if (fetches == null)
      continue;
    for (Fetch<?,?> fetch : fetches) {
      String fPath = ((Members.Member<?, ?>)fetch.getAttribute()).fmd.getFullName(false);
      oPaths.add(fPath);
      if (fetch.getJoinType() == JoinType.INNER) {
        iPaths.add(fPath);
      } 
    }
  }
  if (!iPaths.isEmpty()) {
    exps.fetchInnerPaths = iPaths.toArray(new String[iPaths.size()]);
  }
  if (!oPaths.isEmpty()) {
    exps.fetchPaths = oPaths.toArray(new String[oPaths.size()]);
  }
}

代码示例来源：origin: katharsis-project/katharsis-framework

public static boolean hasManyRootsFetchesOrJoins(CriteriaQuery<?> criteriaQuery) {
 Set<Root<?>> roots = criteriaQuery.getRoots();
 // more than one root, user is supposed to handle this manually
 if (roots.size() != 1)
  return false;
 for (Root<?> root : roots) {
  if (containsMultiRelationFetch(root.getFetches()))
   return true;
  if (containsMultiRelationJoin(root.getJoins()))
   return true;
 }
 return false;
}

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

protected void evalAccessPaths(QueryExpressions exps, ExpressionFactory factory, CriteriaQueryImpl<?> q) {
  Set<ClassMetaData> metas = new HashSet<ClassMetaData>();
  MetamodelImpl metamodel = q.getMetamodel();    
  for (Root<?> root : q.getRoots()) {
    metas.add(((AbstractManagedType<?>)root.getModel()).meta);
    for (Join<?,?> join : root.getJoins()) {
      Class<?> cls = join.getAttribute().getJavaType();
      if (join.getAttribute().isAssociation()) {
        ClassMetaData meta = metamodel.getRepository().getMetaData(cls, null, true);
        PersistenceType type = MetamodelImpl.getPersistenceType(meta);
        if (type == PersistenceType.ENTITY || type == PersistenceType.EMBEDDABLE) 
          metas.add(meta);
      }
    }
    for (Fetch<?,?> fetch : root.getFetches()) {
      metas.add(metamodel.getRepository().getCachedMetaData(fetch.getAttribute().getJavaType()));
    }
  }
  exps.accessPath = metas.toArray(new ClassMetaData[metas.size()]);
}

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

protected void evalAccessPaths(QueryExpressions exps, ExpressionFactory factory, CriteriaQueryImpl<?> q) {
  Set<ClassMetaData> metas = new HashSet<ClassMetaData>();
  MetamodelImpl metamodel = q.getMetamodel();    
  for (Root<?> root : q.getRoots()) {
    metas.add(((AbstractManagedType<?>)root.getModel()).meta);
    for (Join<?,?> join : root.getJoins()) {
      Class<?> cls = join.getAttribute().getJavaType();
      if (join.getAttribute().isAssociation()) {
        ClassMetaData meta = metamodel.getRepository().getMetaData(cls, null, true);
        PersistenceType type = MetamodelImpl.getPersistenceType(meta);
        if (type == PersistenceType.ENTITY || type == PersistenceType.EMBEDDABLE) 
          metas.add(meta);
      }
    }
    for (Fetch<?,?> fetch : root.getFetches()) {
      metas.add(metamodel.getRepository().getCachedMetaData(fetch.getAttribute().getJavaType()));
    }
  }
  exps.accessPath = metas.toArray(new ClassMetaData[metas.size()]);
}

代码示例来源：origin: org.hibernate/com.springsource.org.hibernate.ejb

renderFetches( jpaqlQuery, renderingContext, root.getFetches() );

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