/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed 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.drools.android;
import org.drools.core.rule.JavaDialectRuntimeData;
import org.kie.internal.utils.FastClassLoader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.concurrent.ConcurrentSkipListSet;
import static org.drools.core.util.ClassUtils.convertClassToResourcePath;
/**
* This is an Internal Drools Class
*/
public class DexPackageClassLoader extends MultiDexClassLoader implements FastClassLoader {
protected JavaDialectRuntimeData store;
private Set<String> existingPackages = new ConcurrentSkipListSet<String>();
public DexPackageClassLoader(JavaDialectRuntimeData store,
ClassLoader rootClassLoader) {
super(rootClassLoader);
this.store = store;
}
public Class<?> loadClass(final String name,
final boolean resolve) throws ClassNotFoundException {
Class<?> cls = fastFindClass(name);
if (cls == null) {
ClassLoader parent = getParent();
cls = parent.loadClass(name);
}
if (cls == null) {
throw new ClassNotFoundException("Unable to load class: " + name);
}
return cls;
}
public Class<?> fastFindClass(final String name) {
Class<?> cls = findLoadedClass(name);
if (cls == null) {
final byte[] clazzBytes = this.store.read(convertClassToResourcePath(name));
if (clazzBytes != null) {
String pkgName = name.substring(0,
name.lastIndexOf('.'));
if (!existingPackages.contains(pkgName)) {
synchronized (this) {
if (getPackage(pkgName) == null) {
definePackage(pkgName,
"", "", "", "", "", "",
null);
}
existingPackages.add(pkgName);
}
}
cls = super.defineClass(name, clazzBytes);
}
if (cls != null) {
resolveClass(cls);
}
}
return cls;
}
public InputStream getResourceAsStream(final String name) {
final byte[] clsBytes = this.store.read(name);
if (clsBytes != null) {
return new ByteArrayInputStream(clsBytes);
}
return null;
}
public URL getResource(String name) {
return null;
}
public Enumeration<URL> getResources(String name) throws IOException {
return new Enumeration<URL>() {
public boolean hasMoreElements() {
return false;
}
public URL nextElement() {
throw new NoSuchElementException();
}
};
}
}