| /* |
| * 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.java.execution; |
| |
| import java.util.Collection; |
| import org.apache.wayang.core.api.exception.WayangException; |
| import org.apache.wayang.core.function.ExecutionContext; |
| import org.apache.wayang.core.plan.wayangplan.InputSlot; |
| import org.apache.wayang.core.platform.ChannelInstance; |
| import org.apache.wayang.java.channels.CollectionChannel; |
| import org.apache.wayang.java.operators.JavaExecutionOperator; |
| import org.apache.wayang.java.platform.JavaPlatform; |
| |
| /** |
| * {@link ExecutionContext} implementation for the {@link JavaPlatform}. |
| */ |
| public class JavaExecutionContext implements ExecutionContext { |
| |
| private final JavaExecutionOperator operator; |
| |
| private final ChannelInstance[] inputs; |
| |
| private final int iterationNumber; |
| |
| public JavaExecutionContext(JavaExecutionOperator operator, ChannelInstance[] inputs, int iterationNumber) { |
| this.operator = operator; |
| this.inputs = inputs; |
| this.iterationNumber = iterationNumber; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> Collection<T> getBroadcast(String name) { |
| for (int i = 0; i < this.operator.getNumInputs(); i++) { |
| final InputSlot<?> input = this.operator.getInput(i); |
| if (input.isBroadcast() && input.getName().equals(name)) { |
| final CollectionChannel.Instance broadcastChannelInstance = (CollectionChannel.Instance) this.inputs[i]; |
| return (Collection<T>) broadcastChannelInstance.provideCollection(); |
| } |
| } |
| |
| throw new WayangException("No such broadcast found: " + name); |
| } |
| |
| @Override |
| public int getCurrentIteration() { |
| return this.iterationNumber; |
| } |
| } |