1 files changed, 112 insertions, 0 deletions
diff --git a/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/loader/FilteredSourcePackage.java b/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/loader/FilteredSourcePackage.java
new file mode 100644
index 000000000..287f9eb7a
--- /dev/null
+++ b/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/loader/FilteredSourcePackage.java
@@ -0,0 +1,112 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 2010 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.osgi.internal.loader;
+
+import java.net.URL;
+import java.util.*;
+import org.eclipse.osgi.util.ManifestElement;
+
+public class FilteredSourcePackage extends SingleSourcePackage {
+	private static final char ALL = '*';
+	String[] includes;
+	String[] excludes;
+	String[] friends;
+
+	public FilteredSourcePackage(String name, BundleLoaderProxy supplier, String includes, String excludes, String[] friends) {
+		super(name, supplier);
+		if (includes != null)
+			this.includes = ManifestElement.getArrayFromList(includes);
+		if (excludes != null)
+			this.excludes = ManifestElement.getArrayFromList(excludes);
+		this.friends = friends;
+	}
+
+	public boolean isFriend(String symbolicName) {
+		if (friends == null)
+			return true;
+		for (int i = 0; i < friends.length; i++)
+			if (friends[i].equals(symbolicName))
+				return true;
+		return false;
+	}
+
+	public URL getResource(String name) {
+		if (isFiltered(name, getId()))
+			return null;
+		return super.getResource(name);
+	}
+
+	public Enumeration<URL> getResources(String name) {
+		if (isFiltered(name, getId()))
+			return null;
+		return super.getResources(name);
+	}
+
+	public Class<?> loadClass(String name) throws ClassNotFoundException {
+		if (isFiltered(name, getId()))
+			return null;
+		return super.loadClass(name);
+	}
+
+	private boolean isFiltered(String name, String pkgName) {
+		String lastName = getName(name, pkgName);
+		return !isIncluded(lastName) || isExcluded(lastName);
+	}
+
+	private String getName(String name, String pkgName) {
+		if (!BundleLoader.DEFAULT_PACKAGE.equals(pkgName) && pkgName.length() + 1 <= name.length())
+			return name.substring(pkgName.length() + 1);
+		return name;
+	}
+
+	private boolean isIncluded(String name) {
+		if (includes == null)
+			return true;
+		return isInList(name, includes);
+	}
+
+	private boolean isExcluded(String name) {
+		if (excludes == null)
+			return false;
+		return isInList(name, excludes);
+	}
+
+	private boolean isInList(String name, String[] list) {
+		for (int i = 0; i < list.length; i++) {
+			int len = list[i].length();
+			if (len == 0)
+				continue;
+			if (list[i].charAt(0) == ALL && len == 1)
+				return true; // handles "*" wild card
+			if (list[i].charAt(len - 1) == ALL)
+				if (name.startsWith(list[i].substring(0, len - 1)))
+					return true;
+			if (name.equals(list[i]))
+				return true;
+
+		}
+		return false;
+	}
+
+	@Override
+	public Collection<String> listResources(String path, String filePattern) {
+		Collection<String> result = super.listResources(path, filePattern);
+		for (Iterator<String> resources = result.iterator(); resources.hasNext();) {
+			String resource = resources.next();
+			int lastSlash = resource.lastIndexOf('/');
+			String fileName = lastSlash >= 0 ? resource.substring(lastSlash + 1) : resource;
+			if (!isIncluded(fileName) || isExcluded(fileName))
+				resources.remove();
+		}
+		return result;
+	}
+
+}