/*
* 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.single;
import java.util.List;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.dangdang.ddframe.rdb.sharding.parser.result.router.Condition;
import com.google.common.collect.BoundType;
import com.google.common.collect.Range;
import lombok.AccessLevel;
import lombok.AllArgsConstructor;
/**
* 路由工具类.
*
* @author gaohongtao
*/
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class SingleRouterUtil {
/**
* 将条件对象转换为分片值对象.
*
* @param condition 条件对象
* @return 分片值对象
*/
public static ShardingValue<?> convertConditionToShardingValue(final Condition condition) {
List<Comparable<?>> conditionValues = condition.getValues();
switch (condition.getOperator()) {
case EQUAL:
case IN:
if (1 == conditionValues.size()) {
return new ShardingValue<Comparable<?>>(condition.getColumn().getTableName(), condition.getColumn().getColumnName(), conditionValues.get(0));
}
return new ShardingValue<>(condition.getColumn().getTableName(), condition.getColumn().getColumnName(), conditionValues);
case BETWEEN:
return new ShardingValue<>(condition.getColumn().getTableName(), condition.getColumn().getColumnName(),
Range.range(conditionValues.get(0), BoundType.CLOSED, conditionValues.get(1), BoundType.CLOSED));
default:
throw new UnsupportedOperationException(condition.getOperator().getExpression());
}
}
}