/*
* 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
* agreement.
*/
package io.crate.metadata;
import io.crate.operation.reference.ReferenceResolver;
import io.crate.operation.reference.sys.node.NodeStatsContext;
import io.crate.operation.reference.sys.node.SysNodesExpressionFactories;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
public class LocalSysColReferenceResolver implements ReferenceResolver<RowCollectExpression<NodeStatsContext, ?>> {
private final Map<ColumnIdent, RowCollectExpression<NodeStatsContext, ?>> expressionMap = new HashMap<>();
public LocalSysColReferenceResolver(Iterable<ColumnIdent> localAvailable) {
for (ColumnIdent ident : localAvailable) {
expressionMap.put(
ident,
SysNodesExpressionFactories.getNodeStatsContextExpressions().get(ident).create());
}
}
@Override
public RowCollectExpression<NodeStatsContext, ?> getImplementation(Reference ref) {
return expressionMap.get(ref.ident().columnIdent());
}
public Collection<RowCollectExpression<NodeStatsContext, ?>> expressions() {
return expressionMap.values();
}
}