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@@ -0,0 +1,139 @@
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+/**
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+ * Copyright (c) 2011 committers of YAKINDU and others.
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+ * All rights reserved. This program and the accompanying materials
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+ * are made available under the terms of the Eclipse Public License v1.0
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+ * which accompanies this distribution, and is available at
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+ * http://www.eclipse.org/legal/epl-v10.html
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+ * Contributors:
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+ * committers of YAKINDU - initial API and implementation
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+ *
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+ */
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+package org.yakindu.sct.commons;
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+
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+import java.io.File;
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+import java.net.MalformedURLException;
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+import java.net.URL;
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+import java.net.URLClassLoader;
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+import java.util.List;
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+
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+import org.eclipse.core.resources.IProject;
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+import org.eclipse.core.resources.IResource;
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+import org.eclipse.core.runtime.CoreException;
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+import org.eclipse.core.runtime.IPath;
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+import org.eclipse.core.runtime.Path;
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+import org.eclipse.jdt.core.IJavaProject;
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+import org.eclipse.jdt.core.JavaCore;
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+import org.eclipse.jdt.launching.JavaRuntime;
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+
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+import com.google.common.collect.Lists;
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+
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+/**
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+ * Factory for {@link ClassLoader}s based on {@link IProject}s inside the
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+ * workspace
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+ *
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+ * @author koenemann - Initial contribution and API
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+ * @author holger willebrandt
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+ */
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+public class WorkspaceClassLoaderFactory {
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+
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+ private final boolean resolveSimpleProjectReferences;
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+
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+ public WorkspaceClassLoaderFactory() {
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+ this(false);
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+ }
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+
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+ /**
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+ * @param resolveSimpleProjectReferences
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+ * whether project references should be resolved for non-java
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+ * projects
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+ */
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+ public WorkspaceClassLoaderFactory(boolean resolveSimpleProjectReferences) {
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+ this.resolveSimpleProjectReferences = resolveSimpleProjectReferences;
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+ }
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+
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+ /**
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+ * Creates a {@link ClassLoader} that can be used to load resources from the
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+ * workspace.
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+ */
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+ public ClassLoader createClassLoader(IProject project) {
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+ final List<URL> urls = Lists.newArrayList();
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+
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+ addClasspathEntries(project, urls);
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+
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+ return URLClassLoader.newInstance(urls.toArray(new URL[urls.size()]),
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+ WorkspaceClassLoaderFactory.class.getClassLoader());
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+ }
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+
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+ protected void addClasspathEntries(IProject project, List<URL> urls) {
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+ IJavaProject javaProject = toJavaProject(project);
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+ if (javaProject != null) {
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+ addJavaClasspathEntries(javaProject, urls);
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+ } else {
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+ try {
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+ urls.add(getFileSystemFile(project).toURI().toURL());
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+ } catch (MalformedURLException e1) {
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+ e1.printStackTrace();
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+ }
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+ if (resolveSimpleProjectReferences) {
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+ addReferencedProjectsClasspaths(project, urls);
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+ }
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+ }
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+ }
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+
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+ protected void addReferencedProjectsClasspaths(IProject project,
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+ List<URL> urls) {
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+ try {
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+ IProject[] referencedProjects = project.getReferencedProjects();
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+ for (IProject iProject : referencedProjects) {
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+ addClasspathEntries(iProject, urls);
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+ }
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+ } catch (CoreException e) {
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+ e.printStackTrace();
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+ }
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+ }
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+
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+ protected File getFileSystemFile(IResource resource) {
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+ return new File(resource.getWorkspace().getRoot().getRawLocation()
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+ .toFile().getAbsolutePath()
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+ + File.separator
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+ + resource.getFullPath().toFile().getAbsolutePath());
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+ }
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+
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+ protected IJavaProject toJavaProject(IProject project) {
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+ IJavaProject javaProject = JavaCore.create(project);
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+ if (javaProject.exists()) {
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+ return javaProject;
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+ }
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+ return null;
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+ }
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+
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+ protected void addJavaClasspathEntries(IJavaProject project, List<URL> urls) {
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+ try {
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+ urls.addAll(Lists.newArrayList(convertClassPath(JavaRuntime
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+ .computeDefaultRuntimeClassPath(project))));
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+ } catch (CoreException e) {
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+ e.printStackTrace();
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+ }
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+ }
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+
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+ /**
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+ * Converting string classpath to {@link URL}s.
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+ */
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+ private static URL[] convertClassPath(String[] classPath) {
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+ final URL[] urls = new URL[classPath.length];
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+ for (int i = 0; i < classPath.length; i++) {
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+ final String entry = classPath[i];
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+ final IPath path = new Path(entry);
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+ try {
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+ final URL url = path.toFile().toURI().toURL();
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+ urls[i] = url;
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+ } catch (MalformedURLException e) {
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+ throw new RuntimeException(
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+ "Could not convert classpath entry to URL: "
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+ + path.toString(), e);
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+ }
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+ }
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+ return urls;
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+ }
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+
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+}
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Andreas Mülder