| /* |
| * 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.flink.optimizer.util; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.flink.api.common.Plan; |
| import org.apache.flink.api.common.functions.RichFunction; |
| import org.apache.flink.api.common.operators.Operator; |
| import org.apache.flink.api.common.operators.base.BulkIterationBase; |
| import org.apache.flink.api.common.operators.base.DeltaIterationBase; |
| import org.apache.flink.util.Visitor; |
| |
| /** |
| * Utility to get operator instances from plans via name. |
| */ |
| public class OperatorResolver implements Visitor<Operator<?>> { |
| |
| private final Map<String, List<Operator<?>>> map; |
| private Set<Operator<?>> seen; |
| |
| public OperatorResolver(Plan p) { |
| this.map = new HashMap<String, List<Operator<?>>>(); |
| this.seen = new HashSet<Operator<?>>(); |
| |
| p.accept(this); |
| this.seen = null; |
| } |
| |
| |
| @SuppressWarnings("unchecked") |
| public <T extends Operator<?>> T getNode(String name) { |
| List<Operator<?>> nodes = this.map.get(name); |
| if (nodes == null || nodes.isEmpty()) { |
| throw new RuntimeException("No nodes found with the given name."); |
| } else if (nodes.size() != 1) { |
| throw new RuntimeException("Multiple nodes found with the given name."); |
| } else { |
| return (T) nodes.get(0); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends Operator<?>> T getNode(String name, Class<? extends RichFunction> stubClass) { |
| List<Operator<?>> nodes = this.map.get(name); |
| if (nodes == null || nodes.isEmpty()) { |
| throw new RuntimeException("No node found with the given name and stub class."); |
| } else { |
| Operator<?> found = null; |
| for (Operator<?> node : nodes) { |
| if (node.getClass() == stubClass) { |
| if (found == null) { |
| found = node; |
| } else { |
| throw new RuntimeException("Multiple nodes found with the given name and stub class."); |
| } |
| } |
| } |
| if (found == null) { |
| throw new RuntimeException("No node found with the given name and stub class."); |
| } else { |
| return (T) found; |
| } |
| } |
| } |
| |
| public List<Operator<?>> getNodes(String name) { |
| List<Operator<?>> nodes = this.map.get(name); |
| if (nodes == null || nodes.isEmpty()) { |
| throw new RuntimeException("No node found with the given name."); |
| } else { |
| return new ArrayList<Operator<?>>(nodes); |
| } |
| } |
| |
| @Override |
| public boolean preVisit(Operator<?> visitable) { |
| if (this.seen.add(visitable)) { |
| // add to the map |
| final String name = visitable.getName(); |
| List<Operator<?>> list = this.map.get(name); |
| if (list == null) { |
| list = new ArrayList<Operator<?>>(2); |
| this.map.put(name, list); |
| } |
| list.add(visitable); |
| |
| // recurse into bulk iterations |
| if (visitable instanceof BulkIterationBase) { |
| ((BulkIterationBase) visitable).getNextPartialSolution().accept(this); |
| } else if (visitable instanceof DeltaIterationBase) { |
| ((DeltaIterationBase) visitable).getSolutionSetDelta().accept(this); |
| ((DeltaIterationBase) visitable).getNextWorkset().accept(this); |
| } |
| |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public void postVisit(Operator<?> visitable) {} |
| } |