| package org.apache.maven.extension.internal; |
| |
| /* |
| * 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. |
| */ |
| |
| import org.apache.maven.project.ExtensionDescriptor; |
| import org.apache.maven.project.ExtensionDescriptorBuilder; |
| import org.codehaus.plexus.classworlds.realm.ClassRealm; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| /** |
| * Provides information about artifacts (identified by groupId:artifactId string key) and classpath elements exported by |
| * Maven core itself or a Maven core extension. |
| * |
| * @since 3.3.0 |
| */ |
| public class CoreExtensionEntry |
| { |
| private final ClassRealm realm; |
| |
| private final Set<String> artifacts; |
| |
| private final Set<String> packages; |
| |
| public CoreExtensionEntry( ClassRealm realm, Collection<String> artifacts, Collection<String> packages ) |
| { |
| this.realm = realm; |
| this.artifacts = Collections.unmodifiableSet( new HashSet<>( artifacts ) ); |
| this.packages = Collections.unmodifiableSet( new HashSet<>( packages ) ); |
| } |
| |
| /** |
| * Returns ClassLoader used to load extension classes. |
| */ |
| public ClassRealm getClassRealm() |
| { |
| return realm; |
| } |
| |
| /** |
| * Returns artifacts exported by the extension, identified by groupId:artifactId string key. |
| */ |
| public Set<String> getExportedArtifacts() |
| { |
| return artifacts; |
| } |
| |
| /** |
| * Returns classpath elements exported by the extension. |
| */ |
| public Set<String> getExportedPackages() |
| { |
| return packages; |
| } |
| |
| private static final ExtensionDescriptorBuilder BUILDER = new ExtensionDescriptorBuilder(); |
| |
| public static CoreExtensionEntry discoverFrom( ClassRealm loader ) |
| { |
| Set<String> artifacts = new LinkedHashSet<>(); |
| Set<String> packages = new LinkedHashSet<>(); |
| |
| try |
| { |
| Enumeration<URL> urls = loader.getResources( BUILDER.getExtensionDescriptorLocation() ); |
| while ( urls.hasMoreElements() ) |
| { |
| |
| try ( InputStream is = urls.nextElement().openStream() ) |
| { |
| ExtensionDescriptor descriptor = BUILDER.build( is ); |
| artifacts.addAll( descriptor.getExportedArtifacts() ); |
| packages.addAll( descriptor.getExportedPackages() ); |
| } |
| } |
| } |
| catch ( IOException ignored ) |
| { |
| // exports descriptors are entirely optional |
| } |
| |
| return new CoreExtensionEntry( loader, artifacts, packages ); |
| } |
| |
| public static CoreExtensionEntry discoverFrom( ClassRealm loader, Collection<File> classpath ) |
| { |
| Set<String> artifacts = new LinkedHashSet<>(); |
| Set<String> packages = new LinkedHashSet<>(); |
| |
| try |
| { |
| for ( File entry : classpath ) |
| { |
| ExtensionDescriptor descriptor = BUILDER.build( entry ); |
| if ( descriptor != null ) |
| { |
| artifacts.addAll( descriptor.getExportedArtifacts() ); |
| packages.addAll( descriptor.getExportedPackages() ); |
| } |
| } |
| } |
| catch ( IOException ignored ) |
| { |
| // exports descriptors are entirely optional |
| } |
| |
| return new CoreExtensionEntry( loader, artifacts, packages ); |
| } |
| |
| } |