| /* |
| * 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.wayang.core.platform.lineage; |
| |
| import org.apache.wayang.core.platform.ChannelInstance; |
| |
| /** |
| * Encapsulates a {@link ChannelInstance} in the lazy execution lineage. |
| */ |
| public class ChannelLineageNode extends LazyExecutionLineageNode { |
| |
| |
| /** |
| * The encapsulated {@link ChannelInstance}. |
| */ |
| private final ChannelInstance channelInstance; |
| |
| public ChannelLineageNode(final ChannelInstance channelInstance) { |
| assert !channelInstance.wasProduced(); |
| this.channelInstance = channelInstance; |
| this.channelInstance.noteObtainedReference(); |
| } |
| |
| @Override |
| protected <T> T accept(T accumulator, Aggregator<T> aggregator) { |
| return aggregator.aggregate(accumulator, this); |
| } |
| |
| |
| @Override |
| protected void markAsExecuted() { |
| super.markAsExecuted(); |
| assert !this.channelInstance.wasProduced(); |
| this.channelInstance.markProduced(); |
| this.channelInstance.noteDiscardedReference(false); |
| } |
| |
| @Override |
| public String toString() { |
| return "ChannelLineageNode[" + channelInstance + ']'; |
| } |
| |
| /** |
| * Retrieve the encapsulated {@link ChannelInstance}. |
| * |
| * @return the {@link ChannelInstance} |
| */ |
| public ChannelInstance getChannelInstance() { |
| return this.channelInstance; |
| } |
| } |