| /* |
| * 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.beam.sdk.extensions.sql.impl.rel; |
| |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PCollectionList; |
| import org.apache.beam.sdk.values.Row; |
| import org.apache.calcite.rel.RelNode; |
| |
| /** A {@link RelNode} that can also give a {@link PTransform} that implements the expression. */ |
| public interface BeamRelNode extends RelNode { |
| |
| /** |
| * Whether the collection of rows represented by this relational expression is bounded (known to |
| * be finite) or unbounded (may or may not be finite). |
| * |
| * @return bounded if and only if all PCollection inputs are bounded |
| */ |
| default PCollection.IsBounded isBounded() { |
| return getPCollectionInputs().stream() |
| .allMatch( |
| rel -> |
| BeamSqlRelUtils.getBeamRelInput(rel).isBounded() |
| == PCollection.IsBounded.BOUNDED) |
| ? PCollection.IsBounded.BOUNDED |
| : PCollection.IsBounded.UNBOUNDED; |
| } |
| |
| default List<RelNode> getPCollectionInputs() { |
| return getInputs(); |
| }; |
| |
| PTransform<PCollectionList<Row>, PCollection<Row>> buildPTransform(); |
| |
| /** Perform a DFS(Depth-First-Search) to find the PipelineOptions config. */ |
| default Map<String, String> getPipelineOptions() { |
| Map<String, String> options = null; |
| for (RelNode input : getInputs()) { |
| Map<String, String> inputOptions = ((BeamRelNode) input).getPipelineOptions(); |
| assert inputOptions != null; |
| assert options == null || options == inputOptions; |
| options = inputOptions; |
| } |
| return options; |
| } |
| } |