| /* |
| * 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.maven.index; |
| |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import javax.inject.Singleton; |
| |
| import java.io.File; |
| import java.util.Arrays; |
| import java.util.Comparator; |
| import java.util.Set; |
| import java.util.TreeSet; |
| |
| import org.apache.maven.index.context.IndexingContext; |
| |
| /** |
| * A default repository scanner for Maven 2 repository. |
| * |
| * @author Jason Van Zyl |
| * @author Tamas Cservenak |
| */ |
| @Singleton |
| @Named |
| public class DefaultScanner implements Scanner { |
| |
| private final ArtifactContextProducer artifactContextProducer; |
| |
| @Inject |
| public DefaultScanner(ArtifactContextProducer artifactContextProducer) { |
| this.artifactContextProducer = artifactContextProducer; |
| } |
| |
| public ScanningResult scan(ScanningRequest request) { |
| request.getArtifactScanningListener().scanningStarted(request.getIndexingContext()); |
| |
| ScanningResult result = new ScanningResult(request); |
| |
| scanDirectory(request.getStartingDirectory(), request); |
| |
| request.getArtifactScanningListener().scanningFinished(request.getIndexingContext(), result); |
| |
| return result; |
| } |
| |
| private void scanDirectory(File dir, ScanningRequest request) { |
| if (dir == null) { |
| return; |
| } |
| |
| File[] fileArray = dir.listFiles(); |
| |
| if (fileArray != null) { |
| Set<File> files = new TreeSet<>(new ScannerFileComparator()); |
| |
| files.addAll(Arrays.asList(fileArray)); |
| |
| for (File f : files) { |
| if (f.getName().startsWith(".")) { |
| continue; // skip all hidden files and directories |
| } |
| |
| if (f.isDirectory()) { |
| scanDirectory(f, request); |
| } |
| // else if ( !AbstractIndexCreator.isIndexable( f ) ) |
| // { |
| // continue; // skip non-indexable files |
| // } |
| else { |
| processFile(f, request); |
| } |
| } |
| } |
| } |
| |
| private void processFile(File file, ScanningRequest request) { |
| IndexingContext context = request.getIndexingContext(); |
| |
| ArtifactContext ac = artifactContextProducer.getArtifactContext(context, file); |
| |
| if (ac != null) { |
| request.getArtifactScanningListener().artifactDiscovered(ac); |
| } |
| } |
| |
| // == |
| |
| /** |
| * A special comparator to overcome some very bad limitations of nexus-indexer during scanning: using this |
| * comparator, we force to "discover" POMs last, before the actual artifact file. The reason for this, is to |
| * guarantee that scanner will provide only "best" informations 1st about same artifact, since the POM->artifact |
| * direction of discovery is not trivial at all (pom read -> packaging -> extension -> artifact file). The artifact |
| * -> POM direction is trivial. |
| */ |
| private static class ScannerFileComparator implements Comparator<File> { |
| public int compare(File o1, File o2) { |
| if (o1.getName().endsWith(".pom") && !o2.getName().endsWith(".pom")) { |
| // 1st is pom, 2nd is not |
| return 1; |
| } else if (!o1.getName().endsWith(".pom") && o2.getName().endsWith(".pom")) { |
| // 2nd is pom, 1st is not |
| return -1; |
| } else { |
| // both are "same" (pom or not pom) |
| // Use reverse order so that timestamped snapshots |
| // use latest - not first |
| return o2.getName().compareTo(o1.getName()); |
| } |
| } |
| } |
| } |