50         if (getDeclaredMethod(interfaceClass) == null) {
  51             return "java.lang.NoSuchMethodError";
  52         }
  53 
  54         // 9.1.5 Access to Interface Member Names
  55         // "All interface members are implicitly public. They are
  56         // accessible outside the package where the interface is
  57         // declared if the interface is also declared public or
  58         // protected, in accordance with the rules of 6.6."
  59 
  60         // Search for method declaration in the hierarchy
  61         Class klass = dynamicTargetClass;
  62 
  63         while (klass != Object.class) {
  64             Method method = getDeclaredMethod(klass);
  65 
  66             if (method != null) {
  67                 int modifiers = method.getModifiers();
  68 
  69                 // Check whether obtained method is public and isn't abstract
  70                 if ( Modifier.isPublic(modifiers))
  71                 {
  72                     if (Modifier.isAbstract(modifiers)) {
  73                         return "java.lang.AbstractMethodError";
  74                     } else {
  75                         return String.format("%s.%s"
  76                             , method.getDeclaringClass().getSimpleName()
  77                             , methodName
  78                             );
  79                     }
  80                 } else {
  81                     // IAE is thrown when located method isn't PUBLIC
  82                     // or private.  Private methods are skipped when
  83                     // looking for an interface method.
  84                     if (!Modifier.isPrivate(modifiers)) {
  85                         return "java.lang.IllegalAccessError";
  86                     }
  87                 }
  88             }
  89 
  90             klass = klass.getSuperclass();
  91         }
  92 
  93         // No method declaration is found
  94         return "java.lang.AbstractMethodError";
  95     }
  96 }

  50         if (getDeclaredMethod(interfaceClass) == null) {
  51             return "java.lang.NoSuchMethodError";
  52         }
  53 
  54         // 9.1.5 Access to Interface Member Names
  55         // "All interface members are implicitly public. They are
  56         // accessible outside the package where the interface is
  57         // declared if the interface is also declared public or
  58         // protected, in accordance with the rules of 6.6."
  59 
  60         // Search for method declaration in the hierarchy
  61         Class klass = dynamicTargetClass;
  62 
  63         while (klass != Object.class) {
  64             Method method = getDeclaredMethod(klass);
  65 
  66             if (method != null) {
  67                 int modifiers = method.getModifiers();
  68 
  69                 // Check whether obtained method is public and isn't abstract
  70                 if ( Modifier.isPublic(modifiers)) {

  71                     if (Modifier.isAbstract(modifiers)) {
  72                         return "java.lang.AbstractMethodError";
  73                     } else {
  74                         return String.format("%s.%s",
  75                             method.getDeclaringClass().getSimpleName(),
  76                             methodName);

  77                     }
  78                 } else {
  79                     // IAE is thrown when located method isn't PUBLIC
  80                     // or private.  Private methods are skipped when
  81                     // looking for an interface method.
  82                     if (!Modifier.isPrivate(modifiers)) {
  83                         return "java.lang.IllegalAccessError";
  84                     }
  85                 }
  86             }
  87 
  88             klass = klass.getSuperclass();
  89         }
  90 
  91         // No method declaration is found
  92         return "java.lang.AbstractMethodError";
  93     }
  94 }