| /** |
| * 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.storm.streams; |
| |
| import static org.apache.storm.streams.WindowNode.PUNCTUATION; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.apache.storm.shade.org.jgrapht.DirectedGraph; |
| import org.apache.storm.tuple.Fields; |
| |
| public class StreamUtil { |
| @SuppressWarnings("unchecked") |
| public static <T> List<T> getParents(DirectedGraph<Node, Edge> graph, Node node) { |
| List<Edge> incoming = new ArrayList<>(graph.incomingEdgesOf(node)); |
| List<T> ret = new ArrayList<>(); |
| for (Edge e : incoming) { |
| ret.add((T) e.getSource()); |
| } |
| return ret; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public static <T> List<T> getChildren(DirectedGraph<Node, Edge> graph, Node node) { |
| List<Edge> outgoing = new ArrayList<>(graph.outgoingEdgesOf(node)); |
| List<T> ret = new ArrayList<>(); |
| for (Edge e : outgoing) { |
| ret.add((T) e.getTarget()); |
| } |
| return ret; |
| } |
| |
| public static boolean isPunctuation(Object value) { |
| return PUNCTUATION.equals(value); |
| } |
| |
| public static String getPunctuationStream(String stream) { |
| return stream + PUNCTUATION; |
| } |
| |
| public static String getSourceStream(String stream) { |
| int idx = stream.lastIndexOf(PUNCTUATION); |
| if (idx > 0) { |
| return stream.substring(0, idx); |
| } |
| return stream; |
| } |
| |
| public static Fields getPunctuationFields() { |
| return new Fields(PUNCTUATION); |
| } |
| |
| } |