| /* |
| * 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.sling.commons.fsclassloader.impl; |
| |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.sling.commons.classloader.DynamicClassLoader; |
| |
| public class FSDynamicClassLoader |
| extends URLClassLoader |
| implements DynamicClassLoader { |
| |
| private boolean isDirty = false; |
| |
| private final Set<String> hit = Collections.synchronizedSet(new HashSet<String>()); |
| private final Set<String> miss = Collections.synchronizedSet(new HashSet<String>()); |
| |
| private final DynamicClassLoader parentLoader; |
| |
| public FSDynamicClassLoader(final URL[] urls, final ClassLoader parent) { |
| super(urls, parent); |
| parentLoader = (parent instanceof DynamicClassLoader ? (DynamicClassLoader)parent : null); |
| } |
| |
| /** |
| * @see org.apache.sling.commons.classloader.DynamicClassLoader#isLive() |
| */ |
| public boolean isLive() { |
| return !isDirty && (parentLoader == null || parentLoader.isLive()); |
| } |
| |
| /** |
| * @see java.lang.ClassLoader#loadClass(java.lang.String) |
| */ |
| @Override |
| public Class<?> loadClass(final String name) throws ClassNotFoundException { |
| try { |
| final Class<?> c = super.loadClass(name); |
| this.hit.add(name); |
| return c; |
| } catch (final ClassNotFoundException cnfe) { |
| this.miss.add(name); |
| throw cnfe; |
| } |
| } |
| |
| public void check(final String className) { |
| if ( !this.isDirty ) { |
| this.isDirty = hit.contains(className) || miss.contains(className); |
| } |
| } |
| } |