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br.com.objectos.way.sql.GroupByDef Maven / Gradle / Ivy
/*
* Copyright 2014 Objectos, Fábrica de Software LTDA.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package br.com.objectos.way.sql;
import static com.google.common.collect.Lists.newArrayList;
import java.util.List;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
/**
* @author [email protected] (Patricia Nascimento)
*/
class GroupByDef {
private final List groupList = newArrayList();
public boolean add(CanGroupBy e) {
Preconditions.checkNotNull(e);
return groupList.add(e);
}
public Optional toGroupByInfo() {
Optional res = Optional.absent();
if (!groupList.isEmpty()) {
GroupByInfo info = GroupByInfo.builder()
.groupList(groupList)
.build();
res = Optional.of(info);
}
return res;
}
}
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