| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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. |
| */ |
| package org.apache.calcite.plan.hep; |
| |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.metadata.Metadata; |
| import org.apache.calcite.rel.metadata.MetadataDef; |
| import org.apache.calcite.rel.metadata.MetadataHandler; |
| import org.apache.calcite.rel.metadata.RelMetadataProvider; |
| import org.apache.calcite.rel.metadata.UnboundMetadata; |
| |
| import com.google.common.collect.ImmutableMultimap; |
| import com.google.common.collect.Multimap; |
| |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| import java.lang.reflect.Method; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| /** |
| * HepRelMetadataProvider implements the {@link RelMetadataProvider} interface |
| * by combining metadata from the rels inside of a {@link HepRelVertex}. |
| */ |
| @Deprecated // to be removed before 2.0 |
| class HepRelMetadataProvider implements RelMetadataProvider { |
| //~ Methods ---------------------------------------------------------------- |
| |
| @Override public boolean equals(@Nullable Object obj) { |
| return obj instanceof HepRelMetadataProvider; |
| } |
| |
| @Override public int hashCode() { |
| return 107; |
| } |
| |
| @Deprecated // to be removed before 2.0 |
| @Override public <@Nullable M extends @Nullable Metadata> UnboundMetadata<M> apply( |
| Class<? extends RelNode> relClass, |
| final Class<? extends M> metadataClass) { |
| return (rel, mq) -> { |
| if (!(rel instanceof HepRelVertex)) { |
| return null; |
| } |
| HepRelVertex vertex = (HepRelVertex) rel; |
| final RelNode rel2 = vertex.getCurrentRel(); |
| UnboundMetadata<M> function = |
| requireNonNull(rel.getCluster().getMetadataProvider(), "metadataProvider") |
| .apply(rel2.getClass(), metadataClass); |
| return requireNonNull( |
| function, |
| () -> "no metadata provider for class " + metadataClass) |
| .bind(rel2, mq); |
| }; |
| } |
| |
| @Override public <M extends Metadata> Multimap<Method, MetadataHandler<M>> handlers( |
| MetadataDef<M> def) { |
| return ImmutableMultimap.of(); |
| } |
| } |