/*
* 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.fixture;
import java.util.Collection;
import java.util.HashSet;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.dangdang.ddframe.rdb.sharding.api.strategy.table.SingleKeyTableShardingAlgorithm;
public final class OrderAttrShardingAlgorithm implements SingleKeyTableShardingAlgorithm<Integer> {
@Override
public String doEqualSharding(final Collection<String> tables, final ShardingValue<Integer> shardingValue) {
String suffix = shardingValue.getValue() % 2 == 0 ? "_a" : "_b";
for (String each : tables) {
if (each.endsWith(suffix)) {
return each;
}
}
return null;
}
@Override
public Collection<String> doInSharding(final Collection<String> tables, final ShardingValue<Integer> shardingValue) {
Collection<String> result = new HashSet<>(tables.size());
for (int value : shardingValue.getValues()) {
String suffix = value % 2 == 0 ? "_a" : "_b";
for (String table : tables) {
if (table.endsWith(suffix)) {
result.add(table);
}
}
}
return result;
}
@Override
public Collection<String> doBetweenSharding(final Collection<String> availableTargetNames, final ShardingValue<Integer> shardingValue) {
throw new UnsupportedOperationException();
}
}