1 /* 2 * Copyright (C) 2019 The Dagger Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dagger.internal.codegen; 18 19 import static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.auto.common.BasicAnnotationProcessor.ProcessingStep; 22 import com.google.common.collect.SetMultimap; 23 import java.lang.annotation.Annotation; 24 import java.util.Set; 25 import javax.lang.model.element.Element; 26 27 /** 28 * {@link ProcessingStep} that delegates to another {@code ProcessingStep} and collects timing 29 * statistics for each processing round for that step. 30 */ 31 final class DaggerStatisticsCollectingProcessingStep implements ProcessingStep { 32 33 private final ProcessingStep delegate; 34 private final DaggerStatisticsCollector statisticsCollector; 35 DaggerStatisticsCollectingProcessingStep( ProcessingStep delegate, DaggerStatisticsCollector statisticsCollector)36 DaggerStatisticsCollectingProcessingStep( 37 ProcessingStep delegate, DaggerStatisticsCollector statisticsCollector) { 38 this.delegate = checkNotNull(delegate); 39 this.statisticsCollector = checkNotNull(statisticsCollector); 40 } 41 42 @Override annotations()43 public Set<? extends Class<? extends Annotation>> annotations() { 44 return delegate.annotations(); 45 } 46 47 @Override process( SetMultimap<Class<? extends Annotation>, Element> elementsByAnnotation)48 public Set<? extends Element> process( 49 SetMultimap<Class<? extends Annotation>, Element> elementsByAnnotation) { 50 statisticsCollector.stepStarted(delegate); 51 try { 52 return delegate.process(elementsByAnnotation); 53 } finally { 54 statisticsCollector.stepFinished(delegate); 55 } 56 } 57 } 58