/*
* Licensed to 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
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*/
package io.crate.operation.reference.sys.shard;
import io.crate.metadata.ReferenceImplementation;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.indices.recovery.RecoveryState;
public abstract class ShardRecoveryStateExpression<T> implements ReferenceImplementation<T> {
private final IndexShard indexShard;
ShardRecoveryStateExpression(IndexShard indexShard) {
this.indexShard = indexShard;
}
@Override
public T value() {
// the recoveryState is only null when the shard is in the initialization process where
// this expression must not be called
assert indexShard.recoveryState() != null : "recoveryState must not be null upon value call";
return innerValue(indexShard.recoveryState());
}
protected abstract T innerValue(RecoveryState recoveryState);
}