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/*******************************************************************************
* Copyright (c) 2004, 2014 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.internal.loader.sources;
import java.net.URL;
import java.util.*;
import org.eclipse.osgi.internal.loader.BundleLoader;
import org.eclipse.osgi.util.ManifestElement;
public class FilteredSourcePackage extends SingleSourcePackage {
private static final char ALL = '*';
private final String[] includes;
private final String[] excludes;
public FilteredSourcePackage(String name, BundleLoader supplier, String includes, String excludes) {
super(name, supplier);
this.includes = includes != null ? ManifestElement.getArrayFromList(includes) : null;
this.excludes = excludes != null ? ManifestElement.getArrayFromList(excludes) : null;
}
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;
}
}
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