/*
* 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.Symbol;
import com.facebook.presto.sql.planner.plan.GroupIdNode;
import com.facebook.presto.sql.planner.plan.PlanNode;
import java.util.List;
import java.util.Map;
import static com.facebook.presto.sql.planner.assertions.MatchResult.NO_MATCH;
import static com.facebook.presto.sql.planner.assertions.MatchResult.match;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkState;
public class GroupIdMatcher
implements Matcher
{
private final List<List<String>> groups;
private final Map<String, String> identityMappings;
private final String groupIdAlias;
public GroupIdMatcher(List<List<String>> groups, Map<String, String> identityMappings, String groupIdAlias)
{
this.groups = groups;
this.identityMappings = identityMappings;
this.groupIdAlias = groupIdAlias;
}
@Override
public boolean shapeMatches(PlanNode node)
{
return node instanceof GroupIdNode;
}
@Override
public MatchResult detailMatches(PlanNode node, Session session, Metadata metadata, SymbolAliases symbolAliases)
{
checkState(shapeMatches(node), "Plan testing framework error: shapeMatches returned false in detailMatches in %s", this.getClass().getName());
GroupIdNode groudIdNode = (GroupIdNode) node;
List<List<Symbol>> actualGroups = groudIdNode.getGroupingSets();
Map<Symbol, Symbol> actualArgumentMappings = groudIdNode.getArgumentMappings();
if (actualGroups.size() != groups.size()) {
return NO_MATCH;
}
for (int i = 0; i < actualGroups.size(); i++) {
if (!AggregationMatcher.matches(groups.get(i), actualGroups.get(i), symbolAliases)) {
return NO_MATCH;
}
}
if (!AggregationMatcher.matches(identityMappings.keySet(), actualArgumentMappings.keySet(), symbolAliases)) {
return NO_MATCH;
}
return match(groupIdAlias, groudIdNode.getGroupIdSymbol().toSymbolReference());
}
@Override
public String toString()
{
return toStringHelper(this)
.add("groups", groups)
.toString();
}
}