com.github.shynixn.petblocks.bukkit.lib.ReflectionUtils Maven / Gradle / Ivy
package com.github.shynixn.petblocks.bukkit.lib;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* Copyright 2017 Shynixn
*
* Do not remove this header!
*
* Version 1.0
*
* MIT License
*
* Copyright (c) 2016
*
* 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.
*/
public final class ReflectionUtils {
/**
* Initializes a new instance of reflectionUtils
*/
private ReflectionUtils() {
super();
}
/**
* Returns the class from the name and converts VERSION to the current server version.
*
* @param name name
* @return clazz
* @throws ClassNotFoundException exception
*/
public static Class invokeClass(String name) throws ClassNotFoundException {
if (name == null)
throw new IllegalArgumentException("Name cannot be null!");
return Class.forName(name);
}
/**
* Creates a new instance of the given clazz with the default constructor
*
* @param clazz clazz
* @param returnType
* @return instance
* @throws IllegalAccessException exception
* @throws InstantiationException exceptionInstance
*/
public static T invokeDefaultConstructor(Class clazz) throws IllegalAccessException, InstantiationException {
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
return clazz.newInstance();
}
/**
* Creates a new instance of the given clazz, paramTypes, params
*
* @param clazz clazz
* @param paramTypes paramTypes
* @param params params
* @return instance
* @throws IllegalAccessException exception
* @throws InvocationTargetException exception
* @throws InstantiationException exception
* @throws NoSuchMethodException exception
*/
public static Object invokeConstructor(Class clazz, Class[] paramTypes, Object[] params) throws IllegalAccessException, InvocationTargetException, InstantiationException, NoSuchMethodException {
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
if (paramTypes == null)
throw new IllegalArgumentException("ParamTypes cannot be null");
if (params == null)
throw new IllegalArgumentException("Params cannot be null!");
final Constructor constructor = clazz.getDeclaredConstructor(paramTypes);
constructor.setAccessible(true);
return constructor.newInstance(params);
}
/**
* Invokes the static method of the given clazz, name, paramTypes, params
*
* @param clazz clazz
* @param name name
* @param paramTypes paramTypes
* @param params params
* @param returnType
* @return returnValue
* @throws NoSuchMethodException exception
* @throws InvocationTargetException exception
* @throws IllegalAccessException exception
*/
public static T invokeMethodByClass(Class clazz, String name, Class[] paramTypes, Object[] params) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
if (name == null)
throw new IllegalArgumentException("Name cannot be null!");
if (paramTypes == null)
throw new IllegalArgumentException("ParamTypes cannot be null");
if (params == null)
throw new IllegalArgumentException("Params cannot be null!");
final Method method = clazz.getDeclaredMethod(name, paramTypes);
method.setAccessible(true);
return (T) method.invoke(null, params);
}
/**
* Invokes the method of the given instance, name, paramTypes, params
*
* @param instance instance
* @param name name
* @param paramTypes paramTypes
* @param params params
* @param returnType
* @return returnValue
* @throws NoSuchMethodException exception
* @throws InvocationTargetException exception
* @throws IllegalAccessException exception
*/
public static T invokeMethodByObject(Object instance, String name, Class[] paramTypes, Object[] params) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
return invokeMethodByObject(instance, name, paramTypes, params, instance.getClass());
}
/**
* Invokes the method of the given instance, name, paramTypes, params
*
* @param instance instance
* @param name name
* @param paramTypes paramTypes
* @param params params
* @param clazz clazz
* @param returnType
* @return returnValue
* @throws NoSuchMethodException exception
* @throws InvocationTargetException exception
* @throws IllegalAccessException exception
*/
public static T invokeMethodByObject(Object instance, String name, Class[] paramTypes, Object[] params, Class clazz) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
if (instance == null)
throw new IllegalArgumentException("Instance cannot be null!");
if (name == null)
throw new IllegalArgumentException("Name cannot be null!");
if (paramTypes == null)
throw new IllegalArgumentException("ParamTypes cannot be null");
if (params == null)
throw new IllegalArgumentException("Params cannot be null!");
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
final Method method = clazz.getDeclaredMethod(name, paramTypes);
method.setAccessible(true);
return (T) method.invoke(instance, params);
}
/**
* Invokes the field of the given class and name
*
* @param clazz clazz
* @param name name
* @param returnType
* @return returnValue
* @throws NoSuchFieldException exception
* @throws IllegalAccessException exception
*/
public static T invokeFieldByClass(Class clazz, String name) throws NoSuchFieldException, IllegalAccessException {
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
if (name == null)
throw new IllegalArgumentException("Name cannot be null!");
final Field field = clazz.getDeclaredField(name);
field.setAccessible(true);
return (T) field.get(null);
}
/**
* Invokes the field of the given instance and name
*
* @param instance instance
* @param name name
* @param returnType
* @return returnValue
* @throws NoSuchFieldException exception
* @throws IllegalAccessException exceptionInstance
*/
public static T invokeFieldByObject(Object instance, String name) throws NoSuchFieldException, IllegalAccessException {
return invokeFieldByObject(instance, name, instance.getClass());
}
/**
* Invokes the field of the given instance and name
*
* @param instance instance
* @param name name
* @param clazz clazz
* @param returnType
* @return returnValue
* @throws NoSuchFieldException exception
* @throws IllegalAccessException exceptionInstance
*/
public static T invokeFieldByObject(Object instance, String name, Class clazz) throws NoSuchFieldException, IllegalAccessException {
if (instance == null)
throw new IllegalArgumentException("Object cannot be null!");
if (name == null)
throw new IllegalArgumentException("Name cannot be null!");
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
final Field field = clazz.getDeclaredField(name);
field.setAccessible(true);
return (T) field.get(instance);
}
/**
* Invokes the annotation of the given clazz
*
* @param clazz clazz
* @param annotationClazz annotation
* @param returnType
* @return returnValue
*/
public static T invokeAnnotationByClass(Class clazz, Class annotationClazz) {
if (clazz == null)
throw new IllegalArgumentException("Class cannot be null!");
if (annotationClazz == null)
throw new IllegalArgumentException("AnnotationClass cannot be null!");
for (final Annotation annotation : clazz.getDeclaredAnnotations()) {
if (annotation.annotationType() == annotationClazz)
return (T) annotation;
}
return null;
}
/**
* Invokes the annotation of the given field
*
* @param field field
* @param annotationClazz annotation
* @param returnType
* @return returnValue
*/
public static T invokeAnnotationByField(Field field, Class annotationClazz) {
if (field == null)
throw new IllegalArgumentException("Field cannot be null!");
if (annotationClazz == null)
throw new IllegalArgumentException("AnnotationClass cannot be null!");
for (final Annotation annotation : field.getDeclaredAnnotations()) {
if (annotation.annotationType() == annotationClazz)
return (T) annotation;
}
return null;
}
/**
* Invokes the annotation of the given method
*
* @param method method
* @param annotationClazz annotation
* @param returnType
* @return returnValue
*/
public static T invokeAnnotationByMethod(Method method, Class annotationClazz) {
if (method == null)
throw new IllegalArgumentException("Method cannot be null!");
if (annotationClazz == null)
throw new IllegalArgumentException("AnnotationClass cannot be null!");
for (final Annotation annotation : method.getDeclaredAnnotations()) {
if (annotation.annotationType() == annotationClazz)
return (T) annotation;
}
return null;
}
}