Exemple #1
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 /**
  * Finds public non-static method that is accessible from public class.
  *
  * @param type the class that can have method
  * @param name the name of method to find
  * @param args parameter types that is used to find method
  * @return object that represents found method
  * @throws NoSuchMethodException if method could not be found or some methods are found
  */
 public static Method findInstanceMethod(Class<?> type, String name, Class<?>... args)
     throws NoSuchMethodException {
   Method method = findMethod(type, name, args);
   if (Modifier.isStatic(method.getModifiers())) {
     throw new NoSuchMethodException("Method '" + name + "' is static");
   }
   return method;
 }
 static {
   try {
     Method m = GcInfo.class.getMethod("getMemoryUsageBeforeGc");
     memoryUsageMapType = MappedMXBeanType.getMappedType(m.getGenericReturnType());
   } catch (NoSuchMethodException | OpenDataException e) {
     // Should never reach here
     throw new AssertionError(e);
   }
 }
Exemple #3
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  /**
   * Finds public method (static or non-static) that is accessible from public class.
   *
   * @param type the class that can have method
   * @param name the name of method to find
   * @param args parameter types that is used to find method
   * @return object that represents found method
   * @throws NoSuchMethodException if method could not be found or some methods are found
   */
  public static Method findMethod(Class<?> type, String name, Class<?>... args)
      throws NoSuchMethodException {
    if (name == null) {
      throw new IllegalArgumentException("Method name is not set");
    }
    PrimitiveWrapperMap.replacePrimitivesWithWrappers(args);
    Signature signature = new Signature(type, name, args);

    try {
      Method method = CACHE.get(signature);
      return (method == null) || isPackageAccessible(method.getDeclaringClass())
          ? method
          : CACHE.create(signature);
    } catch (SignatureException exception) {
      throw exception.toNoSuchMethodException("Method '" + name + "' is not found");
    }
  }
Exemple #4
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 /**
  * Finds method that is accessible from public class or interface through class hierarchy.
  *
  * @param method object that represents found method
  * @return object that represents accessible method
  * @throws NoSuchMethodException if method is not accessible or is not found in specified
  *     superclass or interface
  */
 public static Method findAccessibleMethod(Method method) throws NoSuchMethodException {
   Class<?> type = method.getDeclaringClass();
   if (Modifier.isPublic(type.getModifiers()) && isPackageAccessible(type)) {
     return method;
   }
   if (Modifier.isStatic(method.getModifiers())) {
     throw new NoSuchMethodException("Method '" + method.getName() + "' is not accessible");
   }
   for (Type generic : type.getGenericInterfaces()) {
     try {
       return findAccessibleMethod(method, generic);
     } catch (NoSuchMethodException exception) {
       // try to find in superclass or another interface
     }
   }
   return findAccessibleMethod(method, type.getGenericSuperclass());
 }
Exemple #5
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  // SA JStack tool
  private static void runJStackTool(boolean mixed, boolean locks, String args[]) throws Exception {
    Class<?> cl = loadSAClass();
    if (cl == null) {
      usage(1); // SA not available
    }

    // JStack tool also takes -m and -l arguments
    if (mixed) {
      args = prepend("-m", args);
    }
    if (locks) {
      args = prepend("-l", args);
    }

    Class[] argTypes = {String[].class};
    Method m = cl.getDeclaredMethod("main", argTypes);

    Object[] invokeArgs = {args};
    m.invoke(null, invokeArgs);
  }
Exemple #6
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 /**
  * Finds method that accessible from specified class.
  *
  * @param method object that represents found method
  * @param generic generic type that is used to find accessible method
  * @return object that represents accessible method
  * @throws NoSuchMethodException if method is not accessible or is not found in specified
  *     superclass or interface
  */
 private static Method findAccessibleMethod(Method method, Type generic)
     throws NoSuchMethodException {
   String name = method.getName();
   Class<?>[] params = method.getParameterTypes();
   if (generic instanceof Class) {
     Class<?> type = (Class<?>) generic;
     return findAccessibleMethod(type.getMethod(name, params));
   }
   if (generic instanceof ParameterizedType) {
     ParameterizedType pt = (ParameterizedType) generic;
     Class<?> type = (Class<?>) pt.getRawType();
     for (Method m : type.getMethods()) {
       if (m.getName().equals(name)) {
         Class<?>[] pts = m.getParameterTypes();
         if (pts.length == params.length) {
           if (Arrays.equals(params, pts)) {
             return findAccessibleMethod(m);
           }
           Type[] gpts = m.getGenericParameterTypes();
           if (params.length == gpts.length) {
             if (Arrays.equals(params, TypeResolver.erase(TypeResolver.resolve(pt, gpts)))) {
               return findAccessibleMethod(m);
             }
           }
         }
       }
     }
   }
   throw new NoSuchMethodException("Method '" + name + "' is not accessible");
 }
Exemple #7
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 /**
  * Checks validness of the method. The valid method should be public and should have the specified
  * name.
  *
  * @param method the object that represents method
  * @return {@code true} if the method is valid, {@code false} otherwise
  */
 @Override
 protected boolean isValid(Method method) {
   return super.isValid(method) && method.getName().equals(this.name);
 }