/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.metamodel.query.builder;
import java.util.List;
import org.apache.metamodel.query.Query;
import org.apache.metamodel.query.SelectItem;
final class CountSelectBuilderImpl extends SatisfiedSelectBuilderImpl implements
CountSelectBuilder<GroupedQueryBuilder> {
private SelectItem selectItem;
public CountSelectBuilderImpl(Query query, GroupedQueryBuilder queryBuilder) {
super(queryBuilder);
this.selectItem = SelectItem.getCountAllItem();
query.select(selectItem);
}
@Override
public GroupedQueryBuilder as(String alias) {
if (alias == null) {
throw new IllegalArgumentException("alias cannot be null");
}
selectItem.setAlias(alias);
return getQueryBuilder();
}
@Override
protected void decorateIdentity(List<Object> identifiers) {
super.decorateIdentity(identifiers);
identifiers.add(selectItem);
}
}