/*
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.rdb.sharding.router.mixed;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import com.dangdang.ddframe.rdb.sharding.parser.result.router.SQLBuilder;
import com.dangdang.ddframe.rdb.sharding.router.RoutingResult;
import com.dangdang.ddframe.rdb.sharding.router.SQLExecutionUnit;
import lombok.Getter;
import lombok.ToString;
/**
* 笛卡尔积路由结果.
*
* @author gaohongtao
* @author zhangliang
*/
@ToString
final class CartesianResult implements RoutingResult {
@Getter
private final List<CartesianDataSource> routingDataSources = new ArrayList<>();
void merge(final String dataSource, final Collection<CartesianTableReference> routingTableReferences) {
for (CartesianTableReference each : routingTableReferences) {
merge(dataSource, each);
}
}
private void merge(final String dataSource, final CartesianTableReference routingTableReference) {
for (CartesianDataSource each : routingDataSources) {
if (each.getDataSource().equals(dataSource)) {
each.getRoutingTableReferences().add(routingTableReference);
return;
}
}
routingDataSources.add(new CartesianDataSource(dataSource, routingTableReference));
}
@Override
public Collection<SQLExecutionUnit> getSQLExecutionUnits(final SQLBuilder sqlBuilder) {
Collection<SQLExecutionUnit> result = new ArrayList<>();
for (CartesianDataSource each : routingDataSources) {
result.addAll(each.getSQLExecutionUnits(sqlBuilder));
}
return result;
}
}