fr.ms.lang.ClassUtils Maven / Gradle / Ivy
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/*
* Copyright 2016 Marco Semiao
*
* 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 fr.ms.lang;
import java.util.HashSet;
import java.util.Set;
/**
*
* This class {@code ClassUtils} provides commonly used class functions such as
* present, find interfaces method.
*
* @see Marco4J
*
*
* @author Marco Semiao
*
*/
public final class ClassUtils {
private ClassUtils() {
}
public final static boolean classPresent(final String className) {
try {
Class.forName(className);
return true;
} catch (final ClassNotFoundException e) {
return false;
}
}
public final static Class[] findInterfaces(final Class cls) {
if (cls == null) {
return null;
}
final Set interfacesFound = new HashSet();
getAllInterfaces(cls, interfacesFound);
final Class[] interfaces = (Class[]) interfacesFound.toArray(new Class[interfacesFound.size()]);
return interfaces;
}
private final static void getAllInterfaces(Class clazz, final Set interfacesFound) {
while (clazz != null) {
final Class[] interfaces = clazz.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
final Class inter = interfaces[i];
if (interfacesFound.add(inter)) {
getAllInterfaces(inter, interfacesFound);
}
}
clazz = clazz.getSuperclass();
}
}
}