ClassesRelated.java
/*
* Copyright (c) 2021 Mārtiņš Avots (Martins Avots) and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0, or the MIT License,
* which is available at https://spdx.org/licenses/MIT.html.
*
* SPDX-License-Identifier: EPL-2.0 OR MIT
*/
package net.splitcells.dem.utils.reflection;
import net.splitcells.dem.utils.ConstructorIllegal;
import java.io.InputStream;
import java.util.List;
import java.util.Optional;
import static net.splitcells.dem.utils.ConstructorIllegal.constructorIllegal;
import static net.splitcells.dem.utils.reflection.ClassRelatedI.classRelated;
public class ClassesRelated {
private ClassesRelated() {
throw constructorIllegal();
}
private static final ClassRelated INSTANCE = classRelated();
public static List<Class<?>> allClassesOf(String packageName) {
return INSTANCE.allClassesOf(packageName);
}
public static List<Class<?>> allClasses() {
return INSTANCE.allClasses();
}
public static Class<?> callerClass() {
return INSTANCE.callerClass();
}
public static Class<?> callerClass(int i) {
return INSTANCE.callerClass(i);
}
public static String simplifiedName(Class<?> arg) {
return INSTANCE.simplifiedName(arg);
}
public static boolean isSubClass(Class<?> superClass, Class<?> subClass) {
return superClass.isAssignableFrom(subClass);
}
@SuppressWarnings("unchecked")
public static <T> Optional<T> downCast(Class<T> type, Object arg) {
if (isSubClass(type, arg.getClass())) {
return Optional.of((T) arg);
}
return Optional.empty();
}
/**
* Loads the resources of a class, typically located in the src/main/resources of the projects source.
* Note that only the resources of {@param clazz}'s project will be ready.
* If there is a project with the same {@param resourceName} in the same package, this resource is ignored.
*
* @param clazz
* @param resourceName
* @return
*/
public static InputStream resourceOfClass(Class<?> clazz, String resourceName) {
return clazz.getClassLoader().getResourceAsStream(resourceName);
}
}