120 lines
3.3 KiB
Java
120 lines
3.3 KiB
Java
package com.ryanmichela.sshd;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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/**
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* Copyright 2013 Ryan Michela
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*/
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public class ReflectionUtil {
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public static void setProtectedValue(Object o, String field, Object newValue)
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{
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setProtectedValue(o.getClass(), o, field, newValue);
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}
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public static void setProtectedValue(Class c, String field, Object newValue)
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{
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setProtectedValue(c, null, field, newValue);
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}
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public static void setProtectedValue(Class c, Object o, String field, Object newValue)
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{
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try
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{
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Field f = c.getDeclaredField(field);
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f.setAccessible(true);
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Field modifiersField = Field.class.getDeclaredField("modifiers");
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modifiersField.setAccessible(true);
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modifiersField.setInt(f, f.getModifiers() & ~Modifier.FINAL);
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f.set(o, newValue);
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}
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catch (NoSuchFieldException | IllegalAccessException ex)
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{
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System.out.println("*** " + c.getName() + ":" + ex);
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}
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}
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public static <T> T getProtectedValue(Object obj, String fieldName)
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{
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try
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{
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Class c = obj.getClass();
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while (c != Object.class)
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{
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Field[] fields = c.getDeclaredFields();
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for (Field f : fields)
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{
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if (f.getName() == fieldName)
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{
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f.setAccessible(true);
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return (T) f.get(obj);
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}
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}
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c = c.getSuperclass();
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}
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System.out.println("*** " + obj.getClass().getName() + ":No such field");
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return null;
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}
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catch (Exception ex)
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{
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System.out.println("*** " + obj.getClass().getName() + ":" + ex);
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return null;
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}
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}
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public static <T> T getProtectedValue(Class c, String field)
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{
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try
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{
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Field f = c.getDeclaredField(field);
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f.setAccessible(true);
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return (T) f.get(c);
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}
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catch (Exception ex)
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{
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System.out.println("*** " + c.getName() + ":" + ex);
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return null;
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}
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}
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public static Object invokeProtectedMethod(Class c, String method, Object... args)
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{
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return invokeProtectedMethod(c, null, method, args);
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}
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public static Object invokeProtectedMethod(Object o, String method, Object... args)
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{
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return invokeProtectedMethod(o.getClass(), o, method, args);
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}
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public static Object invokeProtectedMethod(Class c, Object o, String method, Object... args)
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{
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try
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{
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Class[] pTypes = new Class[args.length];
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for (int i = 0; i < args.length; i++)
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{
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if (args[i] instanceof Integer)
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pTypes[i] = int.class;
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else
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pTypes[i] = args[i].getClass();
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}
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Method m = c.getDeclaredMethod(method, pTypes);
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m.setAccessible(true);
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return m.invoke(o, args);
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}
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catch (Exception ex)
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{
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System.out.println("*** " + c.getName() + "." + method + "(): " + ex);
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return null;
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}
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}
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}
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