/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.reference.sys.shard;
import io.crate.metadata.PartitionName;
import io.crate.metadata.ReferenceImplementation;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.index.shard.ShardId;
public class ShardPartitionIdentExpression implements ReferenceImplementation<BytesRef> {
private static final BytesRef EMPTY = new BytesRef("");
private final BytesRef value;
public ShardPartitionIdentExpression(ShardId shardId) {
String indexName = shardId.getIndexName();
if (PartitionName.isPartition(indexName)) {
value = new BytesRef(PartitionName.fromIndexOrTemplate(indexName).ident());
} else {
value = EMPTY;
}
}
@Override
public BytesRef value() {
return value;
}
}