/*
* 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.metadata;
import io.crate.operation.reference.partitioned.PartitionExpression;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class PartitionReferenceResolver implements ReferenceResolver {
private final Map<ReferenceIdent, PartitionExpression> expressionMap = new HashMap<>();
private final ReferenceResolver fallbackResolver;
private final List<PartitionExpression> partitionExpressions;
public PartitionReferenceResolver(ReferenceResolver fallbackReferenceResolver,
List<PartitionExpression> partitionExpressions) {
this.fallbackResolver = fallbackReferenceResolver;
this.partitionExpressions = partitionExpressions;
for (PartitionExpression partitionExpression : partitionExpressions) {
expressionMap.put(partitionExpression.info().ident(), partitionExpression);
}
}
@Override
public ReferenceImplementation getImplementation(ReferenceIdent ident) {
PartitionExpression expression = expressionMap.get(ident);
assert expression != null || fallbackResolver.getImplementation(ident) == null
: "granularity < PARTITION should have been resolved already";
return expression;
}
public List<PartitionExpression> expressions() {
return partitionExpressions;
}
}