/*
* 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.JoinNode;
import com.facebook.presto.sql.planner.plan.PlanNode;
import com.facebook.presto.sql.tree.Expression;
import com.google.common.collect.ImmutableSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import static com.facebook.presto.sql.planner.assertions.MatchResult.NO_MATCH;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.collect.ImmutableSet.toImmutableSet;
import static java.util.Objects.requireNonNull;
final class JoinMatcher
implements Matcher
{
private final JoinNode.Type joinType;
private final List<ExpectedValueProvider<JoinNode.EquiJoinClause>> equiCriteria;
private final Optional<Expression> filter;
JoinMatcher(JoinNode.Type joinType, List<ExpectedValueProvider<JoinNode.EquiJoinClause>> equiCriteria, Optional<Expression> filter)
{
this.joinType = requireNonNull(joinType, "joinType is null");
this.equiCriteria = requireNonNull(equiCriteria, "equiCriteria is null");
this.filter = requireNonNull(filter, "filter can not be null");
}
@Override
public boolean shapeMatches(PlanNode node)
{
if (!(node instanceof JoinNode)) {
return false;
}
JoinNode joinNode = (JoinNode) node;
return joinNode.getType() == joinType;
}
@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());
JoinNode joinNode = (JoinNode) node;
if (joinNode.getCriteria().size() != equiCriteria.size()) {
return NO_MATCH;
}
if (filter.isPresent()) {
if (!joinNode.getFilter().isPresent()) {
return NO_MATCH;
}
if (!new ExpressionVerifier(symbolAliases).process(joinNode.getFilter().get(), filter.get())) {
return NO_MATCH;
}
}
else {
if (joinNode.getFilter().isPresent()) {
return NO_MATCH;
}
}
/*
* Have to use order-independent comparison; there are no guarantees what order
* the equi criteria will have after planning and optimizing.
*/
Set<JoinNode.EquiJoinClause> actual = ImmutableSet.copyOf(joinNode.getCriteria());
Set<JoinNode.EquiJoinClause> expected =
equiCriteria.stream()
.map(maker -> maker.getExpectedValue(symbolAliases))
.collect(toImmutableSet());
return new MatchResult(expected.equals(actual));
}
@Override
public String toString()
{
return toStringHelper(this)
.add("equiCriteria", equiCriteria)
.add("filter", filter)
.toString();
}
}