| /* |
| * 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.plan.wayangplan.test; |
| |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.optimizer.cardinality.CardinalityEstimator; |
| import org.apache.wayang.core.optimizer.cardinality.SwitchForwardCardinalityEstimator; |
| import org.apache.wayang.core.plan.wayangplan.ElementaryOperator; |
| import org.apache.wayang.core.plan.wayangplan.InputSlot; |
| import org.apache.wayang.core.plan.wayangplan.LoopHeadOperator; |
| import org.apache.wayang.core.plan.wayangplan.OperatorBase; |
| import org.apache.wayang.core.plan.wayangplan.OutputSlot; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.core.types.DataUnitType; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Optional; |
| |
| /** |
| * {@link LoopHeadOperator} implementation for test purposes. |
| */ |
| public class TestLoopHead<T> extends OperatorBase implements LoopHeadOperator, ElementaryOperator { |
| |
| private int numExpectedIterations; |
| |
| public TestLoopHead(Class<T> dataQuantumClass) { |
| super(2, 2, false); |
| |
| final DataSetType<T> dataSetType = DataSetType.createDefault(DataUnitType.createBasic(dataQuantumClass)); |
| this.inputSlots[0] = new InputSlot<>("initialInput", this, dataSetType); |
| this.inputSlots[1] = new InputSlot<>("loopInput", this, dataSetType); |
| this.outputSlots[0] = new OutputSlot<>("loopOutput", this, dataSetType); |
| this.outputSlots[1] = new OutputSlot<>("finalOutput", this, dataSetType); |
| } |
| |
| @Override |
| public Collection<OutputSlot<?>> getLoopBodyOutputs() { |
| return Collections.singleton(this.getOutput("loopOutput")); |
| } |
| |
| @Override |
| public Collection<OutputSlot<?>> getFinalLoopOutputs() { |
| return Collections.singleton(this.getOutput("finalOutput")); |
| } |
| |
| @Override |
| public Collection<InputSlot<?>> getLoopBodyInputs() { |
| return Collections.singleton(this.getInput("loopInput")); |
| } |
| |
| @Override |
| public Collection<InputSlot<?>> getLoopInitializationInputs() { |
| return Collections.singleton(this.getInput("initialInput")); |
| } |
| |
| @Override |
| public Collection<InputSlot<?>> getConditionInputSlots() { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public Collection<OutputSlot<?>> getConditionOutputSlots() { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public int getNumExpectedIterations() { |
| return this.numExpectedIterations; |
| } |
| |
| public void setNumExpectedIterations(int numExpectedIterations) { |
| this.numExpectedIterations = numExpectedIterations; |
| } |
| |
| @Override |
| public Optional<CardinalityEstimator> createCardinalityEstimator(int outputIndex, Configuration configuration) { |
| switch (outputIndex) { |
| case 0: |
| case 1: |
| return Optional.of(new SwitchForwardCardinalityEstimator(0, 1)); |
| default: |
| throw new IllegalArgumentException("Illegal output index " + outputIndex + "."); |
| } |
| } |
| } |