org.apache.tools.ant.util.SplitClassLoader Maven / Gradle / Ivy
/*
* 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
*
* https://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.tools.ant.util;
import org.apache.tools.ant.AntClassLoader;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Path;
/**
* Specialized classloader for tasks that need finer grained control
* over which classes are to be loaded via Ant's classloader and which
* should not even if they are available.
*/
public final class SplitClassLoader extends AntClassLoader {
private final String[] splitClasses;
/**
* @param parent ClassLoader
* @param path Path
* @param project Project
* @param splitClasses classes contained herein will not be loaded
* via Ant's classloader
*/
public SplitClassLoader(ClassLoader parent, Path path, Project project,
String[] splitClasses) {
super(parent, project, path, true);
this.splitClasses = splitClasses;
}
// forceLoadClass is not convenient here since it would not
// properly deal with inner classes of these classes.
@Override
protected synchronized Class loadClass(String classname, boolean resolve)
throws ClassNotFoundException {
Class theClass = findLoadedClass(classname);
if (theClass != null) {
return theClass;
}
if (isSplit(classname)) {
theClass = findClass(classname);
if (resolve) {
resolveClass(theClass);
}
return theClass;
}
return super.loadClass(classname, resolve);
}
private boolean isSplit(String classname) {
String simplename = classname.substring(classname.lastIndexOf('.') + 1);
for (String splitClass : splitClasses) {
if (simplename.equals(splitClass)
|| simplename.startsWith(splitClass + '$')) {
return true;
}
}
return false;
}
}