| /* |
| * 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 java.util.Optional; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.optimizer.cardinality.CardinalityEstimator; |
| import org.apache.wayang.core.optimizer.cardinality.DefaultCardinalityEstimator; |
| import org.apache.wayang.core.plan.wayangplan.UnaryToUnaryOperator; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.core.types.DataUnitType; |
| |
| /** |
| * Test operator that exposes filter-like behavior. |
| */ |
| public class TestFilterOperator<InputType> extends UnaryToUnaryOperator<InputType, InputType> { |
| |
| private double selectivity = 0.7d; |
| |
| /** |
| * Creates a new instance. |
| */ |
| public TestFilterOperator(DataSetType<InputType> inputType) { |
| super(inputType, inputType, true); |
| } |
| |
| public TestFilterOperator(Class<InputType> inputTypeClass) { |
| this(DataSetType.createDefault(DataUnitType.createBasic(inputTypeClass))); |
| } |
| |
| |
| @Override |
| public Optional<CardinalityEstimator> createCardinalityEstimator(int outputIndex, |
| Configuration configuration) { |
| assert outputIndex == 0; |
| return Optional.of(new DefaultCardinalityEstimator(1d, 1, true, cards -> Math.round(this.selectivity * cards[0]))); |
| } |
| |
| @Override |
| public boolean isSupportingBroadcastInputs() { |
| return true; |
| } |
| |
| public double getSelectivity() { |
| return this.selectivity; |
| } |
| |
| public void setSelectivity(double selectivity) { |
| this.selectivity = selectivity; |
| } |
| } |