Failed to create proxy class

Discussion in 'Plugin Development' started by RcExtract, Apr 27, 2018.

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  1. Offline

    RcExtract

    Related codes:
    Code:Java
    1.     public static void main(String[] args) {
    2.         JavaBinder binder = new JavaBaseBinder();
    3.         System.out.println(binder.registerBindConfiguration(Person.class));//line 18
    4.         System.out.println(((JavaBaseBinder) binder).configurations.size());
    5.         for (Entry<Class<?>, Serializable> entry : ((JavaBaseBinder) binder).configurations.entrySet())
    6.             System.out.println(entry.getKey().getName() + entry.getValue());
    7.         try {
    8.             for (Pair<String, Object> pair : ((Properties<?>) binder.deepSerialize(new Person("bob", true, "hi", 13), Properties.class)).entryList())
    9.                 System.out.println(pair.getKey() + ": " + pair.getValue());
    10.         } catch (InvalidInformationException e) {
    11.             e.printStackTrace();
    12.         }
    13.     }

    Code:JAVA
    1.     @Override
    2.     public boolean registerBindConfiguration(Class<?> clazz, Serializable serializable) {
    3.         if (serializable == null || serializable.name() == null || serializable.type() == null || serializable.priority() == null || serializable.priority().length < 1) return false;
    4.         if (serializable.provided()) {
    5.             List<SerialType> priority = Arrays.asList(serializable.priority());
    6.             for (SerialType type : SerialType.values())
    7.                 if (priority.indexOf(type) != priority.lastIndexOf(type)) return false;
    8.             test:
    9.             switch (serializable.type()) {
    10.             case FIELDS:
    11.                 if (priority.contains(SerialType.CONVERSION) || priority.contains(SerialType.COMPILATION) || priority.size() != 1) return false;
    12.                 List<Class<?>> finaltypes = new ArrayList<Class<?>>();
    13.                 for (Field field : clazz.getFields()) if (Modifier.isFinal(field.getModifiers()) || field.getAnnotation(Constant.class) != null) finaltypes.add(field.getType());
    14.                 if (finaltypes.isEmpty()) break;
    15.                 for (Constructor<?> constructor : clazz.getConstructors())
    16.                     if (constructor.isAccessible() && Utility.containsSequence(Arrays.asList(constructor.getParameterTypes()), finaltypes) && constructor.getExceptionTypes().length == 0) break test;
    17.                 return false;
    18.             case GETTERS_AND_SETTERS:
    19.                 if (priority.contains(SerialType.CONVERSION) || priority.contains(SerialType.COMPILATION) || priority.size() != 1) return false;
    20.                 List<Class<?>> finaltypes2 = new ArrayList<Class<?>>();
    21.                 for (Method method : clazz.getMethods()) {
    22.                     String name = method.getName();
    23.                     boolean constant = method.getAnnotation(Constant.class) != null;
    24.                     if (method.getAnnotation(Transient.class) == null && Modifier.isPublic(method.getModifiers()) && !(Modifier.isStatic(method.getModifiers()))) {
    25.                         if (name.startsWith("get") && method.getReturnType() != null) {
    26.                             Method test;
    27.                             try {
    28.                                 test = clazz.getMethod("set" + name.substring(3), method.getReturnType());
    29.                             } catch (NoSuchMethodException | SecurityException e) {
    30.                                 return false;
    31.                             }
    32.                             if (!test.isAccessible() || Modifier.isStatic(test.getModifiers())) return false;
    33.                             if (constant) finaltypes2.add(method.getReturnType());
    34.                         } else if (name.startsWith("set") && method.getParameterCount() == 1) {
    35.                             Method test;
    36.                             try {
    37.                                 test = clazz.getMethod("get" + name.substring(3));
    38.                             } catch (NoSuchMethodException | SecurityException e) {
    39.                                 return false;
    40.                             }
    41.                             if (!(test.isAccessible() && test.getReturnType() == method.getParameterTypes()[0]) || Modifier.isStatic(test.getModifiers())) return false;
    42.                             if (constant) finaltypes2.add(method.getParameterTypes()[0]);
    43.                         }
    44.                     }
    45.                 }
    46.                 if (finaltypes2.isEmpty()) break;
    47.                 for (Constructor<?> constructor : clazz.getConstructors())
    48.                     if (constructor.isAccessible() && Utility.containsSequence(Arrays.asList(constructor.getParameterTypes()), finaltypes2) && constructor.getExceptionTypes().length == 0) break test;
    49.                 return false;
    50.             case UTILITY_METHODS:
    51.                 if (priority.contains(SerialType.CONVERSION)) {
    52.                     Method method;
    53.                     try {
    54.                         method = clazz.getDeclaredMethod("convert");
    55.                     } catch (NoSuchMethodException | SecurityException e) {
    56.                         return false;
    57.                     }
    58.                     if (method.getExceptionTypes().length == 0 && method.getReturnType() == null || Modifier.isStatic(method.getModifiers()) || !(Modifier.isPublic(method.getModifiers()))) return false;
    59.                     Class<?> o = method.getReturnType();
    60.                     Method smethod;
    61.                     try {
    62.                         smethod = clazz.getDeclaredMethod("revert", o);
    63.                     } catch (NoSuchMethodException | SecurityException e) {
    64.                         return false;
    65.                     }
    66.                     if (!(smethod.getExceptionTypes().length == 0 && smethod.getReturnType() == clazz && Modifier.isPublic(smethod.getModifiers()) && Modifier.isStatic(smethod.getModifiers()))) return false;
    67.                     registerInternalUtility(method, smethod, Converter.class);
    68.                 }
    69.                 if (priority.contains(SerialType.COMPILATION)) {
    70.                     Method method;
    71.                     try {
    72.                         method = clazz.getDeclaredMethod("compile");
    73.                     } catch (NoSuchMethodException | SecurityException e) {
    74.                         return false;
    75.                     }
    76.                     if (!(method.getExceptionTypes().length == 0 && method.getReturnType() == Properties.class && Modifier.isPublic(method.getModifiers()) && !Modifier.isStatic(method.getModifiers()))) return false;
    77.                     Method smethod;
    78.                     try {
    79.                         smethod = clazz.getDeclaredMethod("decompile", Properties.class);
    80.                     } catch (NoSuchMethodException | SecurityException e) {
    81.                         return false;
    82.                     }
    83.                     if (!(smethod.getExceptionTypes().length == 0 && smethod.getReturnType() == clazz && Modifier.isPublic(smethod.getModifiers()) && Modifier.isStatic(smethod.getModifiers()))) return false;
    84.                     registerInternalUtility(method, smethod, Compiler.class);//line 338
    85.                 }
    86.                 if (priority.contains(SerialType.ENCRYPTION)) {
    87.                     Method method;
    88.                     try {
    89.                         method = clazz.getDeclaredMethod("encrypt");
    90.                     } catch (NoSuchMethodException | SecurityException e) {
    91.                         return false;
    92.                     }
    93.                     if (!(method.getExceptionTypes().length == 0 && method.getReturnType() == List.class && Modifier.isPublic(method.getModifiers()) && !Modifier.isStatic(method.getModifiers()))) return false;
    94.                     Method smethod;
    95.                     try {
    96.                         smethod = clazz.getDeclaredMethod("decrypt", List.class);
    97.                     } catch (NoSuchMethodException | SecurityException e) {
    98.                         return false;
    99.                     }
    100.                     if (!(smethod.getExceptionTypes().length == 0 && smethod.getReturnType() == clazz && Modifier.isPublic(smethod.getModifiers()) && Modifier.isStatic(smethod.getModifiers()))) return false;
    101.                     registerInternalUtility(method, smethod, Cipher.class);
    102.                 }
    103.                 break;
    104.             }
    105.         }
    106.         if (configurations.putIfAbsent(clazz, serializable) != null) return false;
    107.         return true;
    108.     }
    109.  
    110.     @Override
    111.     public void registerInternalUtility(Method i, Method s, Class<?> utility) throws IllegalArgumentException {
    112.         if (!(Arrays.asList(new Class<?>[] {
    113.             Converter.class,
    114.             Compiler.class,
    115.             Cipher.class
    116.         }).contains(utility))) throw new IllegalArgumentException();
    117.         /*line 371*/functions.add((Function<?, ?>) Proxy.newProxyInstance(utility.getClassLoader(), new Class<?>[] { Function.class }, new InvocationHandler() {
    118.  
    119.             @Override
    120.             public Object invoke(Object proxy, Method method, Object[] args) {
    121.                 System.out.println("here2?");
    122.                 System.out.println(proxy.getClass().getName());
    123.                 System.out.println(method.getName());
    124.                 if (method.getName().equalsIgnoreCase("apply"))
    125.                     try {
    126.                         return i.invoke(args[0]);
    127.                     } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
    128.                         //These exceptions are never thrown.
    129.                         throw new UnreachableError();
    130.                     }
    131.                 else if (method.getName().equalsIgnoreCase("revert"))
    132.                     try {
    133.                         return s.invoke(null, args[0]);
    134.                     } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
    135.                         //These exceptions are never thrown.
    136.                         throw new UnreachableError();
    137.                     }
    138.                 throw new UnsupportedOperationException();//line 392
    139.             }
    140.  
    141.         }));
    142.     }
    143.  
    144.     public List<Converter<?, ?>> getSerializingConversionPath(Class<?> clazz, Class<?> target) {
    145.         System.out.println("here?");
    146.         List<Converter<?, ?>> path = new ArrayList<Converter<?, ?>>();
    147.         @SuppressWarnings("unchecked")
    148.         EnhancedSet<Converter<?, ?>> converters = (EnhancedSet<Converter<?, ?>>) functions.getIf(function -> function instanceof Converter);
    149.         for (Converter<?, ?> converter : converters)
    150.             if (converter.getInputType() == clazz) {
    151.                 path.add(converter);
    152.                 List<Converter<?, ?>> extra = getSerializingConversionPath(converter.getOutputType(), target);
    153.                 if (extra.get(extra.size() - 1).getOutputType() == target) {
    154.                     path.addAll(extra);
    155.                     break;
    156.                 }
    157.             }
    158.         return path;
    159.     }
    in JavaBaseBinder.
    Code:JAVA
    1.     public default boolean registerBindConfiguration(Class<?> clazz) {
    2.         return registerBindConfiguration(clazz, clazz.getDeclaredAnnotation(Serializable.class));//line 111
    3.     }
    in JavaBinder.
    Stack trace:
    Code:JAVA
    1. Exception in thread "main" java.lang.UnsupportedOperationException
    2.     at com.rcextract.commons.io.JavaBaseBinder$1.invoke(JavaBaseBinder.java:392)
    3.     at com.sun.proxy.$Proxy2.hashCode(Unknown Source)
    4.     at java.util.HashMap.hash(HashMap.java:339)
    5.     at java.util.HashMap.put(HashMap.java:612)
    6.     at java.util.HashSet.add(HashSet.java:220)
    7.     at com.rcextract.commons.io.JavaBaseBinder.registerInternalUtility(JavaBaseBinder.java:371)
    8.     at com.rcextract.commons.io.JavaBaseBinder.registerBindConfiguration(JavaBaseBinder.java:338)
    9.     at com.rcextract.commons.io.JavaBinder.registerBindConfiguration(JavaBinder.java:111)
    10.     at com.rcextract.commons.lang.Test.main(Test.java:18)

    Any help is appreciated (idk what is going on).

    This is a library which i will use it soon on my plugin.
     
    RcExtract, Apr 27, 2018
    #1
  2. Offline

    MightyOne

    I don't even know what a BaseBinder is. I mean surely there is someone who already is familiar with that kind of stuff buuuut since this one person is not here yet :D you could explain (to me) what you are going to achieve with this code

    And comments wouldn't be that bad as well :mad:
     
    MightyOne, Apr 27, 2018
    #2
  3. Offline

    RcExtract

    Thats a temporary name for the class. Also, the library is mine. I was debugging it and came across a problem which is the topic of this thread. (No one will be familiar with my library except myself)
    The library basically aims to serialize and deserialize objects in different ways.
    I know Proxy class is rarely used by others and i expected not much people know about it. Anyway, thx for reading my thread. Help is appreciated.

    EDIT:
    The UnsupportedOperationException was obviously thrown from somewhere u know, which is in the proxy class. It was thrown obviously because the method invoked was neither named "apply" or revert. But when i check the method name invoked, it was called "hashCode", and the proxy object is "Proxy" and with something behind. Also, i realized that much more information is required for u to understand what i am doing in order to help me.

    EDIT2:
    So i found that only final methods will not be handled by the invocationhandler. So for hashCode, toString and equals method, i copied the statments from java.lang.Object to my invocationhandler. That solves the problem, but not a good solution.
     
    Last edited: Apr 27, 2018
    RcExtract, Apr 27, 2018
    #3
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