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Diffstat (limited to 'java/sca/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java')
-rw-r--r--java/sca/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java386
1 files changed, 0 insertions, 386 deletions
diff --git a/java/sca/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java b/java/sca/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java
deleted file mode 100644
index 25b3eae350..0000000000
--- a/java/sca/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/java/impl/ContributionClassLoader.java
+++ /dev/null
@@ -1,386 +0,0 @@
-/*
- * 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.tuscany.sca.contribution.java.impl;
-
-import java.io.IOException;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.net.URLClassLoader;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Enumeration;
-import java.util.HashSet;
-
-import org.apache.tuscany.sca.contribution.Contribution;
-import org.apache.tuscany.sca.contribution.Export;
-import org.apache.tuscany.sca.contribution.Import;
-import org.apache.tuscany.sca.contribution.java.JavaImport;
-
-
-public class ContributionClassLoader extends URLClassLoader {
-// public class ContributionClassLoader {
-
- private Contribution contribution;
- // private b urlClassLoader;
-
- /**
- * Constructor for contribution ClassLoader
- *
- * @param contribution
- * @param parent
- * @throws MalformedURLException
- */
- public ContributionClassLoader(Contribution contribution, final ClassLoader parent) {
- super(new URL[0], parent);
- // Note that privileged use of getContextClassLoader have been promoted to callers.
- // super(new URL[0], parent == null?Thread.currentThread().getContextClassLoader(): null);
- this.contribution = contribution;
- if (contribution.getLocation() != null) {
- try {
- this.addURL(new URL(contribution.getLocation()));
- for (URL url : ContributionHelper.getNestedJarUrls(contribution)) {
- this.addURL(url);
- }
- } catch (IOException e) {
- throw new RuntimeException(e);
- }
- }
- }
-
- /*
- * Return the ClassLoader corresponding to a contribution providing an export
- * Create a new ClassLoader for the contribution if one does not exist
- */
- private ClassLoader getExportClassLoader(Contribution exportingContribution) {
- ClassLoader cl = exportingContribution.getClassLoader();
- if (!(cl instanceof ContributionClassLoader)) {
- if (cl == null) {
- cl = getParent();
- }
-
- cl = new ContributionClassLoader(exportingContribution, cl);
- exportingContribution.setClassLoader(cl);
- }
- return cl;
- }
-
- /* (non-Javadoc)
- * @see java.net.URLClassLoader#findClass(java.lang.String)
- *
- * Search path for class:
- * This contribution
- * Imported contributions
- */
- @Override
- protected Class<?> findClass(String className) throws ClassNotFoundException {
-
- Class<?> clazz = null;
- try {
- clazz = findClassFromContribution(className);
- } catch (ClassNotFoundException e) {
-
- for (Import import_ : this.contribution.getImports()) {
- if (classNameMatchesImport(className, import_)) {
- // Delegate the resolution to the imported contribution
- for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) {
-
- ClassLoader exportClassLoader = getExportClassLoader(exportingContribution);
- if (exportClassLoader instanceof ContributionClassLoader) {
-
- for (Export export : exportingContribution.getExports()) {
- try {
- if (import_.match(export)) {
- clazz = ((ContributionClassLoader)exportClassLoader).findClassFromContribution(className);
- break;
- }
- } catch (ClassNotFoundException e1) {
- continue;
- }
-
- }
- if (clazz != null) break;
- }
- }
- if (clazz != null) break;
- }
- }
-
- if (clazz == null) throw e;
- }
- return clazz;
- }
-
-
- /* (non-Javadoc)
- * @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)
- *
- * Search path for class:
- * Parent ClassLoader
- * This contribution
- * Imported contributions
- *
- */
- @Override
- protected synchronized Class<?> loadClass(String className, boolean resolveClass)
- throws ClassNotFoundException {
-
- Class<?> clazz = null;
- try {
-
- if (this.getParent() != null)
- clazz = this.getParent().loadClass(className);
-
- } catch (ClassNotFoundException e) {
- }
-
- if (clazz == null)
- clazz = findClass(className);
-
-
- if (resolveClass)
- this.resolveClass(clazz);
- return clazz;
-
- }
-
-
-
- /*
- * (non-Javadoc)
- *
- * @see java.net.URLClassLoader#findResource(java.lang.String)
- */
- @Override
- public URL findResource(String name) {
-
- URL url = findResourceFromContribution(name);
-
- if (url == null) {
- for (Import import_ : this.contribution.getImports()) {
- if (resourceNameMatchesImport(name, import_)) {
- // Delegate the resolution to the imported contribution
- for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) {
-
- ClassLoader exportClassLoader = getExportClassLoader(exportingContribution);
- if (exportClassLoader instanceof ContributionClassLoader) {
-
- for (Export export : exportingContribution.getExports()) {
- if (import_.match(export)) {
- url = ((ContributionClassLoader)exportClassLoader).findResourceFromContribution(name);
- if (url != null) break;
- }
- }
- if (url != null) break;
- }
- }
- if (url != null) break;
- }
- }
-
- }
- return url;
- }
-
-
- /* (non-Javadoc)
- * @see java.net.URLClassLoader#findResources(java.lang.String)
- */
- @Override
- public Enumeration<URL> findResources(String name) throws IOException {
-
- return Collections.enumeration(findResourceSet(name));
- }
-
-
-
-
- /* (non-Javadoc)
- * @see java.lang.ClassLoader#getResource(java.lang.String)
- *
- * Find a resource.
- * Search path for resource:
- * Parent ClassLoader
- * This contribution
- * Imported contributions
- */
- @Override
- public URL getResource(String resName) {
-
- URL resource = null;
-
- if (this.getParent() != null) {
- resource = this.getParent().getResource(resName);
- }
- if (resource == null)
- resource = findResource(resName);
-
- return resource;
- }
-
-
-
- /* (non-Javadoc)
- * @see java.lang.ClassLoader#getResources(java.lang.String)
- *
- * Return list of resources from this contribution, resources
- * imported through imported contributions and resources from parent
- * ClassLoader.
- */
- @Override
- public Enumeration<URL> getResources(String resName) throws IOException {
-
- HashSet<URL> resourceSet = findResourceSet(resName);
- addEnumerationToCollection(resourceSet, super.getResources(resName));
-
- return Collections.enumeration(resourceSet);
- }
-
-
- /*
- * Find set of resources
- */
- private HashSet<URL> findResourceSet(String name) throws IOException {
-
- HashSet<URL> resources = new HashSet<URL>();
-
- addEnumerationToCollection(resources, super.findResources(name));
-
- for (Import import_ : this.contribution.getImports()) {
- if (!(import_ instanceof JavaImport)) {
- continue;
- }
- if (resourceNameMatchesImport(name, import_)) {
- // Delegate the resolution to the imported contribution
- for (Contribution exportingContribution : ((JavaImportModelResolver)import_.getModelResolver()).getExportContributions()) {
-
- ClassLoader exportClassLoader = getExportClassLoader(exportingContribution);
- if (exportClassLoader instanceof ContributionClassLoader) {
-
- for (Export export : exportingContribution.getExports()) {
- if (import_.match(export)) {
- addEnumerationToCollection(resources,
- ((ContributionClassLoader)exportClassLoader).findResources(name));
- }
- }
- }
- }
- }
- }
-
- return resources;
- }
-
-
- /*
- * Find class from contribution. If class has already been loaded, return loaded class.
- */
- private Class<?> findClassFromContribution(String className) throws ClassNotFoundException {
-
- Class<?> clazz = findLoadedClass(className);
- if (clazz == null)
- clazz = super.findClass(className);
- return clazz;
-
- }
-
- /*
- * Find resource from contribution.
- */
- private URL findResourceFromContribution(String name) {
-
- return super.findResource(name);
- }
-
- /**
- * Check if a class name matches an import statement.
- * Class matches if the package name used in <import.java/> matches
- *
- * @param name Name of class
- * @param import_ SCA contribution import
- * @return true if this is a matching import
- */
- private boolean classNameMatchesImport(String name, Import import_) {
-
- if (import_ instanceof JavaImport && name != null && name.lastIndexOf('.') > 0) {
- JavaImport javaImport = (JavaImport) import_;
-
- String packageName = name.substring(0, name.lastIndexOf('.'));
- if (javaImport.getPackage().endsWith(".*")) {
- String prefix = javaImport.getPackage().substring(0, javaImport.getPackage().length() -1);
- if (packageName.startsWith(prefix)) {
- return true;
- }
- } else {
- return packageName.equals(javaImport.getPackage());
- }
- }
-
- return false;
- }
-
- /**
- * Check if a resource name matches an import statement.
- * Resource matches if package/namespace match the directory of resource.
- *
- * @param name Name of resource
- * @param import_ SCA contribution import
- * @return true if this is a matching import
- */
- private boolean resourceNameMatchesImport(String name, Import import_) {
-
-
- if (name == null || name.lastIndexOf('/') <= 0)
- return false;
- else if (import_ instanceof JavaImport) {
- JavaImport javaImport = (JavaImport) import_;
-
- if (javaImport.getPackage().endsWith(".*")) {
- String packageName = name.substring(0, name.lastIndexOf('/')).replace('/', '.');
- String prefix = javaImport.getPackage().substring(0, javaImport.getPackage().length() -1);
- if (packageName.startsWith(prefix)) {
- return true;
- }
- } else {
- // 'name' is a resource : contains "/" as separators
- // Get package name from resource name
- String packageName = name.substring(0, name.lastIndexOf('/'));
- return packageName.equals(javaImport.getPackage().replaceAll("\\.", "/"));
- }
- }
- return false;
- }
-
- /*
- * Add an enumeration to a Collection
- */
- private <T extends Object> void addEnumerationToCollection(Collection<T> collection, Enumeration<T> enumeration) {
-
- while (enumeration.hasMoreElements())
- collection.add(enumeration.nextElement());
- }
-
-
- @Override
- public String toString() {
- return "SCA Contribution ClassLoader location: " + contribution.getLocation() + " parent ClassLoader: " + getParent();
- }
-
-
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 08:45:07 +0000