org.apache.bval.jsr303.util.ClassHelper Maven / Gradle / Ivy
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* 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.bval.jsr303.util;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.lang.ClassUtils;
/**
* Common operations on classes that do not require an {@link AccessController}.
*
* @author Carlos Vara
*/
public class ClassHelper {
private ClassHelper() {
// No instances please
}
/**
* Fill the list with the full class/interface hierarchy of the given class.
* List is ordered from the most to less specific.
*
* @param allClasses
* The current list of classes in the hierarchy.
* @param clazz
* The current class, root of the hierarchy to traverse.
*/
static public void fillFullClassHierarchyAsList(List> allClasses, Class clazz) {
if (clazz == null || clazz == Object.class) {
return;
}
if (allClasses.contains(clazz)) {
return;
}
allClasses.add(clazz);
List> subClasses = new ArrayList>(Arrays.asList(clazz.getInterfaces()));
subClasses.add(0, clazz.getSuperclass());
for (Class subClass : subClasses) {
fillFullClassHierarchyAsList(allClasses, subClass);
}
}
/**
* Perform ClassUtils.getClass functions with Java 2 Security enabled.
*/
public static Class getClass(String className) throws ClassNotFoundException {
return getClass(className, true);
}
public static Class getClass(String className, boolean initialize) throws ClassNotFoundException {
ClassLoader ctxtCldr = SecureActions.getContextClassLoader(Thread.currentThread());
ClassLoader loader = (ctxtCldr != null) ? ctxtCldr : SecureActions.getClassLoader(ClassHelper.class);
return ClassUtils.getClass(loader, className, initialize);
}
}