com.ensarsarajcic.neovim.java.handler.util.ReflectionUtils Maven / Gradle / Ivy
/*
* MIT License
*
* Copyright (c) 2018 Ensar Sarajčić
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.ensarsarajcic.neovim.java.handler.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.*;
/**
* Utilities for reflection required by this library, since all handlers are called reflectively
*/
public final class ReflectionUtils {
private ReflectionUtils() {
throw new AssertionError("No instances");
}
/**
* Runs through passed type to find methods annotated with annotation
* @param type type to run through
* @param annotation annotation to look for
* @param type of annotation
* @return list of method and annotation pairs
*/
public static List> getMethodsAnnotatedWith(final Class type, final Class annotation) {
final List> methods = new ArrayList<>();
Class klass = type;
// Iterate through hierarchy of passed type
while (klass != Object.class) {
// Get all methods
final List allMethods = new ArrayList<>(Arrays.asList(klass.getDeclaredMethods()));
for (final Method method : allMethods) {
// Add methods that have the annotation
if (method.isAnnotationPresent(annotation)) {
T annotInstance = method.getAnnotation(annotation);
methods.add(new AbstractMap.SimpleEntry<>(method, annotInstance));
}
}
klass = klass.getSuperclass();
}
return methods;
}
}