| /* |
| 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.edgent.oplet.core; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.edgent.function.Consumer; |
| import org.apache.edgent.oplet.OpletContext; |
| |
| public abstract class Source<T> extends AbstractOplet<Void, T> { |
| |
| private Consumer<T> destination; |
| |
| @Override |
| public void initialize(OpletContext<Void, T> context) { |
| super.initialize(context); |
| |
| destination = context.getOutputs().get(0); |
| } |
| |
| protected Consumer<T> getDestination() { |
| return destination; |
| } |
| |
| /** |
| * Submit a tuple to single output. |
| * @param tuple Tuple to be submitted. |
| */ |
| protected void submit(T tuple) { |
| getDestination().accept(tuple); |
| } |
| |
| @Override |
| public final List<Consumer<Void>> getInputs() { |
| return Collections.emptyList(); |
| } |
| } |