| /* |
| * 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.runners.direct.portable; |
| |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.apache.beam.sdk.runners.TransformHierarchy; |
| import org.apache.beam.sdk.transforms.display.DisplayData; |
| import org.apache.beam.sdk.transforms.display.HasDisplayData; |
| |
| /** |
| * Validate correct implementation of {@link DisplayData} by evaluating {@link |
| * HasDisplayData#populateDisplayData(DisplayData.Builder)} during pipeline construction. |
| */ |
| class DisplayDataValidator { |
| // Do not instantiate |
| private DisplayDataValidator() {} |
| |
| static void validatePipeline(Pipeline pipeline) { |
| validateTransforms(pipeline); |
| } |
| |
| static void validateOptions(PipelineOptions options) { |
| evaluateDisplayData(options); |
| } |
| |
| private static void validateTransforms(Pipeline pipeline) { |
| pipeline.traverseTopologically(Visitor.INSTANCE); |
| } |
| |
| private static void evaluateDisplayData(HasDisplayData component) { |
| DisplayData.from(component); |
| } |
| |
| private static class Visitor extends Pipeline.PipelineVisitor.Defaults { |
| private static final Visitor INSTANCE = new Visitor(); |
| |
| @Override |
| public CompositeBehavior enterCompositeTransform(TransformHierarchy.Node node) { |
| if (!node.isRootNode()) { |
| evaluateDisplayData(node.getTransform()); |
| } |
| |
| return CompositeBehavior.ENTER_TRANSFORM; |
| } |
| |
| @Override |
| public void visitPrimitiveTransform(TransformHierarchy.Node node) { |
| evaluateDisplayData(node.getTransform()); |
| } |
| } |
| } |