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Diffstat (limited to 'framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/extension/internal/CoreExtensionEntry.java')
-rw-r--r-- | framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/extension/internal/CoreExtensionEntry.java | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/extension/internal/CoreExtensionEntry.java b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/extension/internal/CoreExtensionEntry.java new file mode 100644 index 00000000..edadeb2d --- /dev/null +++ b/framework/src/maven/apache-maven-3.3.3/maven-core/src/main/java/org/apache/maven/extension/internal/CoreExtensionEntry.java @@ -0,0 +1,141 @@ +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 java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.net.URL; +import java.util.Collection; +import java.util.Enumeration; +import java.util.LinkedHashSet; +import java.util.Set; + +import org.apache.maven.project.ExtensionDescriptor; +import org.apache.maven.project.ExtensionDescriptorBuilder; +import org.codehaus.plexus.classworlds.realm.ClassRealm; +import org.codehaus.plexus.util.IOUtil; + +import com.google.common.collect.ImmutableSet; + +/** + * 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 = ImmutableSet.copyOf( artifacts ); + this.packages = ImmutableSet.copyOf( 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<String>(); + Set<String> packages = new LinkedHashSet<String>(); + + try + { + Enumeration<URL> urls = loader.getResources( builder.getExtensionDescriptorLocation() ); + while ( urls.hasMoreElements() ) + { + InputStream is = urls.nextElement().openStream(); + try + { + ExtensionDescriptor descriptor = builder.build( is ); + artifacts.addAll( descriptor.getExportedArtifacts() ); + packages.addAll( descriptor.getExportedPackages() ); + } + finally + { + IOUtil.close( is ); + } + } + } + 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<String>(); + Set<String> packages = new LinkedHashSet<String>(); + + 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 ); + } + +} |