/*
* 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.
*/
package com.facebook.presto.sql.planner.assertions;
import com.facebook.presto.Session;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.sql.planner.plan.PlanNode;
import static com.google.common.base.MoreObjects.toStringHelper;
final class SymbolCardinalityMatcher
implements Matcher
{
private final int numberOfSymbols;
SymbolCardinalityMatcher(int numberOfSymbols)
{
this.numberOfSymbols = numberOfSymbols;
}
@Override
public boolean shapeMatches(PlanNode node)
{
return true;
}
@Override
public MatchResult detailMatches(PlanNode node, Session session, Metadata metadata, SymbolAliases symbolAliases)
{
return new MatchResult(node.getOutputSymbols().size() == numberOfSymbols);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("numberOfSymbols", numberOfSymbols)
.toString();
}
}