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T - the type of the resultpublic interface CriteriaQuery<T>
The CriteriaQuery interface defines functionality that is specific
to top-level queries.
| Method Summary | |
|---|---|
CriteriaQuery<T> |
distinct(boolean distinct)
Specify whether duplicate query results will be eliminated. |
java.util.List<Order> |
getOrderList()
Return the ordering expressions in order of precedence. |
java.util.Set<ParameterExpression<?>> |
getParameters()
Return the parameters of the query. |
CriteriaQuery<T> |
groupBy(Expression<?>... grouping)
Specify the expressions that are used to form groups over the query results. |
CriteriaQuery<T> |
groupBy(java.util.List<Expression<?>> grouping)
Specify the expressions that are used to form groups over the query results. |
CriteriaQuery<T> |
having(Expression<java.lang.Boolean> restriction)
Specify a restriction over the groups of the query. |
CriteriaQuery<T> |
having(Predicate... restrictions)
Specify restrictions over the groups of the query according the conjunction of the specified restriction predicates. |
CriteriaQuery<T> |
multiselect(java.util.List<Selection<?>> selectionList)
Specify the selection items that are to be returned in the query result. |
CriteriaQuery<T> |
multiselect(Selection<?>... selections)
Specify the selection items that are to be returned in the query result. |
CriteriaQuery<T> |
orderBy(java.util.List<Order> o)
Specify the ordering expressions that are used to order the query results. |
CriteriaQuery<T> |
orderBy(Order... o)
Specify the ordering expressions that are used to order the query results. |
CriteriaQuery<T> |
select(Selection<? extends T> selection)
Specify the item that is to be returned in the query result. |
CriteriaQuery<T> |
where(Expression<java.lang.Boolean> restriction)
Modify the query to restrict the query result according to the specified boolean expression. |
CriteriaQuery<T> |
where(Predicate... restrictions)
Modify the query to restrict the query result according to the conjunction of the specified restriction predicates. |
| Methods inherited from interface javax.persistence.criteria.AbstractQuery |
|---|
from, from, getGroupList, getGroupRestriction, getRestriction, getResultType, getRoots, getSelection, isDistinct, subquery |
| Method Detail |
|---|
CriteriaQuery<T> select(Selection<? extends T> selection)
Note: Applications using the string-based API may need to specify the type of the select item when it results from a get or join operation and the query result type is specified. For example:
CriteriaQuery<String> q = qb.createQuery(String.class);
Root<Order> order = q.from(Order.class);
q.select(order.get("shippingAddress").<String>get("state"));
CriteriaQuery<Product> q2 = qb.createQuery(Product.class);
q2.select(q2.from(Order.class)
.join("items")
.<Item,Product>join("product"));
selection - selection specifying the item that
is to be returned in the query result
java.lang.IllegalArgumentException - if the selection is
a compound selection and more than one selection
item has the same assigned aliasCriteriaQuery<T> multiselect(Selection<?>... selections)
An argument to the multiselect method must not be a tuple- or array-valued compound selection item.
The semantics of this method are as follows:
CriteriaQuery<Tuple>
(i.e., a criteria query object created by either the
createTupleQuery method or by passing a Tuple class argument
to the createQuery method), a Tuple object corresponding to
the arguments of the multiselect method will be instantiated
and returned for each row that results from the query
execution.
CriteriaQuery<X> for
some user-defined class X (i.e., a criteria query object
created by passing a X class argument to the createQuery
method), the arguments to the multiselect method will be
passed to the X constructor and an instance of type X will be
returned for each row.
CriteriaQuery<X[]> for
some class X, an instance of type X[] will be returned for
each row. The elements of the array will correspond to the
arguments of the multiselect method.
CriteriaQuery<Object>
or if the criteria query was created without specifying a
type, and only a single argument is passed to the multiselect
method, an instance of type Object will be returned for
each row.
CriteriaQuery<Object>
or if the criteria query was created without specifying a
type, and more than one argument is passed to the multiselect
method, an instance of type Object[] will be instantiated
and returned for each row. The elements of the array will
correspond to the arguments to the multiselect method.
selections - selection items corresponding to the
results to be returned by the query
java.lang.IllegalArgumentException - if a selection item is
not valid or if more than one selection item has
the same assigned aliasCriteriaQuery<T> multiselect(java.util.List<Selection<?>> selectionList)
The type of the result of the query execution depends on
the specification of the type of the criteria query object
created as well as the argument to the multiselect method.
An element of the list passed to the multiselect method
must not be a tuple- or array-valued compound selection item.
The semantics of this method are as follows:
CriteriaQuery<Tuple>
(i.e., a criteria query object created by either the
createTupleQuery method or by passing a Tuple class argument
to the createQuery method), a Tuple object corresponding to
the elements of the list passed to the multiselect method
will be instantiated and returned for each row that results
from the query execution.
CriteriaQuery<X> for
some user-defined class X (i.e., a criteria query object
created by passing a X class argument to the createQuery
method), the elements of the list passed to the multiselect
method will be passed to the X constructor and an instance
of type X will be returned for each row.
CriteriaQuery<X[]> for
some class X, an instance of type X[] will be returned for
each row. The elements of the array will correspond to the
elements of the list passed to the multiselect method.
CriteriaQuery<Object>
or if the criteria query was created without specifying a
type, and the list passed to the multiselect method contains
only a single element, an instance of type Object will be
returned for each row.
CriteriaQuery<Object>
or if the criteria query was created without specifying a
type, and the list passed to the multiselect method contains
more than one element, an instance of type Object[] will be
instantiated and returned for each row. The elements of the
array will correspond to the elements of the list passed to
the multiselect method.
selectionList - list of selection items corresponding
to the results to be returned by the query
java.lang.IllegalArgumentException - if a selection item is
not valid or if more than one selection item has
the same assigned aliasCriteriaQuery<T> where(Expression<java.lang.Boolean> restriction)
AbstractQuery method.
where in interface AbstractQuery<T>restriction - a simple or compound boolean expression
CriteriaQuery<T> where(Predicate... restrictions)
AbstractQuery method.
where in interface AbstractQuery<T>restrictions - zero or more restriction predicates
CriteriaQuery<T> groupBy(Expression<?>... grouping)
AbstractQuery method.
groupBy in interface AbstractQuery<T>grouping - zero or more grouping expressions
CriteriaQuery<T> groupBy(java.util.List<Expression<?>> grouping)
AbstractQuery method.
groupBy in interface AbstractQuery<T>grouping - list of zero or more grouping expressions
CriteriaQuery<T> having(Expression<java.lang.Boolean> restriction)
AbstractQuery method.
having in interface AbstractQuery<T>restriction - a simple or compound boolean expression
CriteriaQuery<T> having(Predicate... restrictions)
AbstractQuery method.
having in interface AbstractQuery<T>restrictions - zero or more restriction predicates
CriteriaQuery<T> orderBy(Order... o)
o - zero or more ordering expressions
CriteriaQuery<T> orderBy(java.util.List<Order> o)
o - list of zero or more ordering expressions
CriteriaQuery<T> distinct(boolean distinct)
AbstractQuery method.
distinct in interface AbstractQuery<T>distinct - boolean value specifying whether duplicate
results must be eliminated from the query result or
whether they must be retained
java.util.List<Order> getOrderList()
java.util.Set<ParameterExpression<?>> getParameters()
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EclipseLink 1.2.0, build 'v20091016-r5565' API Reference | |||||||||
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