本文整理汇总了Java中com.querydsl.core.types.CollectionExpression类的典型用法代码示例。如果您正苦于以下问题：Java CollectionExpression类的具体用法？Java CollectionExpression怎么用？Java CollectionExpression使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
CollectionExpression类属于com.querydsl.core.types包，在下文中一共展示了CollectionExpression类的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: hasManyRootsFetchesOrJoins
import com.querydsl.core.types.CollectionExpression; //导入依赖的package包/类
public static boolean hasManyRootsFetchesOrJoins(JPAQuery<?> query) {
List<JoinExpression> joins = query.getMetadata().getJoins();
for (JoinExpression join : joins) {
if (join.getTarget() instanceof CollectionExpression) {
return true;
}
}
return false;
}
示例2: QuerydslQueryBackend
import com.querydsl.core.types.CollectionExpression; //导入依赖的package包/类
public QuerydslQueryBackend(QuerydslQueryImpl<T> queryImpl, Class<T> clazz, MetaDataObject parentMeta,
MetaAttribute parentAttr, boolean addParentSelection) {
this.queryImpl = queryImpl;
JPAQueryFactory queryFactory = queryImpl.getQueryFactory();
if (parentMeta != null) {
parentFrom = QuerydslUtils.getEntityPath(parentMeta.getImplementationClass());
root = QuerydslUtils.getEntityPath(clazz);
Path joinPath = (Path) QuerydslUtils.get(parentFrom, parentAttr.getName());
joinHelper = new JoinRegistry<>(this, queryImpl);
joinHelper.putJoin(new MetaAttributePath(), root);
if (addParentSelection) {
Expression<Object> parentIdExpr = getParentIdExpression(parentMeta, parentAttr);
querydslQuery = queryFactory.select(parentIdExpr, root);
}
else {
querydslQuery = queryFactory.select(root);
}
querydslQuery = querydslQuery.from(parentFrom);
if (joinPath instanceof CollectionExpression) {
querydslQuery = querydslQuery.join((CollectionExpression) joinPath, root);
}
else {
querydslQuery = querydslQuery.join((EntityPath) joinPath, root);
}
}
else {
root = QuerydslUtils.getEntityPath(clazz);
joinHelper = new JoinRegistry<>(this, queryImpl);
joinHelper.putJoin(new MetaAttributePath(), root);
querydslQuery = queryFactory.select(root);
querydslQuery = querydslQuery.from((EntityPath) root);
}
}
示例3: innerJoin
import com.querydsl.core.types.CollectionExpression; //导入依赖的package包/类
public <P> void innerJoin(CollectionExpression<?,P> target, Path<P> alias) {
jpaQuery.innerJoin(target, alias);
}