diff options
Diffstat (limited to 'sca-java-1.x/tags/1.6-TUSCANY-3909/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/WARContributionClassLoader.java')
| -rw-r--r-- | sca-java-1.x/tags/1.6-TUSCANY-3909/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/WARContributionClassLoader.java | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/WARContributionClassLoader.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/WARContributionClassLoader.java new file mode 100644 index 0000000000..4047371583 --- /dev/null +++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/contribution-jee-impl/src/main/java/org/apache/tuscany/sca/contribution/jee/impl/WARContributionClassLoader.java @@ -0,0 +1,191 @@ +/* + * 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.jee.impl; + +import java.io.IOException; +import java.net.MalformedURLException; +import java.net.URL; +import java.net.URLClassLoader; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.Enumeration; +import java.util.HashSet; +import java.util.List; + +import org.apache.tuscany.sca.contribution.Artifact; +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; +import org.apache.tuscany.sca.contribution.jee.EjbModuleInfo; +import org.apache.tuscany.sca.contribution.jee.JavaEEApplicationInfo; +import org.apache.tuscany.sca.contribution.jee.WebModuleInfo; + + +public class WARContributionClassLoader extends URLClassLoader { + + private Contribution contribution; + private WebModuleInfo webModuleInfo = null; + + /** + * Constructor for contribution ClassLoader + * + * @param contribution + * @param parent + * @throws MalformedURLException + */ + public WARContributionClassLoader(Contribution contribution, final ClassLoader parent) { + super(new URL[0], parent); + + this.contribution = contribution; + + // get the classloaders for any WAR archive that is a contribution + // TODO extend to case where JEE archive is outside the contribution + for (Artifact artifact : contribution.getArtifacts()){ + if (artifact.getModel() instanceof WebModuleInfo){ + webModuleInfo = (WebModuleInfo)artifact.getModel(); + break; + } + } + + } + + /* (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; + ClassNotFoundException cne = null; + + try { + clazz = webModuleInfo.getModuleClassloader().loadClass(className); + } catch (ClassNotFoundException e) { + cne = e; + } + + if (clazz == null){ + throw cne; + } + + 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.lang.ClassLoader#getResource(java.lang.String) + * + * Find a resource. + * Search path for resource: + * Parent ClassLoader + * This contribution + */ + @Override + public URL getResource(String resName) { + + URL resource = null; + + if (this.getParent() != null) { + resource = this.getParent().getResource(resName); + } + if (resource == null) + resource = webModuleInfo.getModuleClassloader().getResource(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 = new HashSet<URL>(); + + addEnumerationToCollection(resourceSet, webModuleInfo.getModuleClassloader().getResources(resName)); + addEnumerationToCollection(resourceSet, super.getResources(resName)); + + return Collections.enumeration(resourceSet); + } + + + /* + * 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 WAR ClassLoader, parent ClassLoader: " + getParent(); + } + + +} |