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73 lines
1.6 KiB
Java
73 lines
1.6 KiB
Java
/*
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* Copyright 2011, Mysema Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.mysema.query.sql;
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import java.util.List;
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import com.mysema.commons.lang.CloseableIterator;
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import com.mysema.query.types.Expression;
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import com.mysema.query.types.OrderSpecifier;
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import com.mysema.query.types.Predicate;
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/**
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* Union defines an interface for Union queries
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*
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* @author tiwe
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*
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* @param <RT> return type of projection
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*/
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public interface Union<RT> {
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/**
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* Get the projection as a typed List
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*
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* @return
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*/
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List<RT> list();
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/**
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* Get the projection as a typed Iterator
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*
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* @return
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*/
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CloseableIterator<RT> iterate();
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/**
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* Defines the grouping/aggregation expressions
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*
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* @param o
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* @return
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*/
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Union<RT> groupBy(Expression<?>... o);
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/**
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* Defines the filters for aggregation
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*
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* @param o
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* @return
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*/
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Union<RT> having(Predicate... o);
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/**
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* Define the ordering of the query results
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*
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* @param o
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* @return
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*/
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Union<RT> orderBy(OrderSpecifier<?>... o);
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}
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