125 lines
3.2 KiB
Java
125 lines
3.2 KiB
Java
package eu.mikroskeem.utils.reflect;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import java.lang.reflect.Field;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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/**
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* Reflection utils
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*
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* @author Mark
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*/
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public class Reflect {
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/**
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* Find class by name
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*
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* @param clazz Class to search
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* @return Class or null
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*/
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@Nullable
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public static Class<?> getClass(@NotNull String clazz){
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try {
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return Class.forName(clazz);
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} catch (ClassNotFoundException e){
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return null;
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}
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}
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/**
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* Return whether class exists or not
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*
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* @param clazz Class to search
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* @return Whether class existed or not
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*/
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public static boolean classExists(@NotNull String clazz){
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return getClass(clazz) != null;
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}
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/**
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* Get declared class method (public,protected,private)
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*
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* @param clazz Class to reflect
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* @param method Method to search
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* @param arguments Method arguments
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* @return Method or null
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*/
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@Nullable
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public static Method getMethod(@NotNull Class<?> clazz, @NotNull String method, Class<?>... arguments){
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try {
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Method m = clazz.getDeclaredMethod(method, arguments);
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m.setAccessible(true);
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return m;
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} catch (NoSuchMethodException e){
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return null;
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}
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}
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/**
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* Invoke method and get result
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*
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* @param method Method to invoke
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* @param instance Instance where given method resides (null if static)
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* @param args Method arguments
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* @return Method result or null
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*/
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@Nullable
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public static Object invokeMethod(@NotNull Method method, @Nullable Object instance, @Nullable Object... args){
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try {
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return method.invoke(instance, args);
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} catch (IllegalAccessException|InvocationTargetException e){
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return null;
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}
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}
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/**
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* Get declared class field (public,protected,private)
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*
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* @param clazz Class to reflect
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* @param field Field to search
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* @return Field or null
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*/
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@Nullable
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public static Field getField(@NotNull Class<?> clazz, @NotNull String field){
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try {
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Field f = clazz.getDeclaredField(field);
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f.setAccessible(true);
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return f;
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} catch (NoSuchFieldException e){
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return null;
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}
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}
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/**
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* Read field
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*
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* @param field Field to read
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* @param instance Instance where to read (null if static)
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* @return Field contents or null;
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*/
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@Nullable
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public static Object readField(@NotNull Field field, @Nullable Object instance){
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try {
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return field.get(instance);
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} catch (IllegalAccessException e){
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return null;
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}
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}
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/**
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* Write field
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*
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* @param field Field to write
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* @param instance Instance where field resides (null if static)
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* @param value Field new contents
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*/
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public static void writeField(@NotNull Field field, @Nullable Object instance, @Nullable Object value){
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try {
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field.set(instance, value);
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} catch (IllegalAccessException e){}
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}
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}
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