natclass.cc

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}

jclass
java::lang::Class::getDeclaringClass (void)
{
  // Until we have inner classes, it makes sense to always return
  // NULL.
  return NULL;
}

jint
java::lang::Class::_getFields (JArray<java::lang::reflect::Field *> *result,
			       jint offset)
{
  int count = 0;
  for (int i = 0;  i < field_count;  i++)
    {
      _Jv_Field *field = &fields[i];
      if (! (field->getModifiers() & java::lang::reflect::Modifier::PUBLIC))
	continue;
      ++count;

      if (result != NULL)
	{
	  java::lang::reflect::Field *rfield
	    = new java::lang::reflect::Field ();
	  rfield->offset = (char *) field - (char *) fields;
	  rfield->declaringClass = this;
	  rfield->name = _Jv_NewStringUtf8Const (field->name);
	  (elements (result))[offset++] = rfield;
	}
    }
  jclass superclass = getSuperclass();
  if (superclass != NULL)
    {
      int s_count = superclass->_getFields (result, offset);
      count += s_count;
      offset += s_count;
    }
  for (int i = 0; i < interface_count; ++i)
    {
      int f_count = interfaces[i]->_getFields (result, offset);
      count += f_count;
      offset += f_count;
    }
  return count;
}

JArray<java::lang::reflect::Field *> *
java::lang::Class::getFields (void)
{
  // FIXME: security checking.

  using namespace java::lang::reflect;

  int count = _getFields (NULL, 0);

  JArray<java::lang::reflect::Field *> *result
    = ((JArray<java::lang::reflect::Field *> *)
       JvNewObjectArray (count, &java::lang::reflect::Field::class$, NULL));

  _getFields (result, 0);

  return result;
}

JArray<jclass> *
java::lang::Class::getInterfaces (void)
{
  jobjectArray r = JvNewObjectArray (interface_count, getClass (), NULL);
  jobject *data = elements (r);
  for (int i = 0; i < interface_count; ++i)
    data[i] = interfaces[i];
  return reinterpret_cast<JArray<jclass> *> (r);
}

java::lang::reflect::Method *
java::lang::Class::_getMethod (jstring name, JArray<jclass> *param_types)
{
  jstring partial_sig = getSignature (param_types, false);
  jint p_len = partial_sig->length();
  _Jv_Utf8Const *utf_name = _Jv_makeUtf8Const (name);
  for (Class *klass = this; klass; klass = klass->getSuperclass())
    {
      int i = klass->isPrimitive () ? 0 : klass->method_count;
      while (--i >= 0)
	{
	  // FIXME: access checks.
	  if (_Jv_equalUtf8Consts (klass->methods[i].name, utf_name)
	      && _Jv_equaln (klass->methods[i].signature, partial_sig, p_len)
	      && (klass->methods[i].accflags
		  & java::lang::reflect::Modifier::INVISIBLE) == 0)
	    {
	      // Found it.
	      using namespace java::lang::reflect;

	      // Method must be public.
	      if (! Modifier::isPublic (klass->methods[i].accflags))
		break;

	      Method *rmethod = new Method ();
	      rmethod->offset = ((char *) (&klass->methods[i])
				 - (char *) klass->methods);
	      rmethod->declaringClass = klass;
	      return rmethod;
	    }
	}
    }

  // If we haven't found a match, and this class is an interface, then
  // check all the superinterfaces.
  if (isInterface())
    {
      for (int i = 0; i < interface_count; ++i)
	{
	  using namespace java::lang::reflect;
	  Method *rmethod = interfaces[i]->_getMethod (name, param_types);
	  if (rmethod != NULL)
	    return rmethod;
	}
    }

  return NULL;
}

// This is a very slow implementation, since it re-scans all the
// methods we've already listed to make sure we haven't duplicated a
// method.  It also over-estimates the required size, so we have to
// shrink the result array later.
jint
java::lang::Class::_getMethods (JArray<java::lang::reflect::Method *> *result,
				jint offset)
{
  jint count = 0;

  // First examine all local methods
  for (int i = isPrimitive () ? 0 : method_count; --i >= 0; )
    {
      _Jv_Method *method = &methods[i];
      if (method->name == NULL
	  || _Jv_equalUtf8Consts (method->name, clinit_name)
	  || _Jv_equalUtf8Consts (method->name, init_name)
	  || _Jv_equalUtf8Consts (method->name, finit_name)
	  || (method->accflags
	      & java::lang::reflect::Modifier::INVISIBLE) != 0)
	continue;
      // Only want public methods.
      if (! java::lang::reflect::Modifier::isPublic (method->accflags))
	continue;

      // This is where we over-count the slots required if we aren't
      // filling the result for real.
      if (result != NULL)
	{
	  jboolean add = true;
	  java::lang::reflect::Method **mp = elements (result);
	  // If we already have a method with this name and signature,
	  // then ignore this one.  This can happen with virtual
	  // methods.
	  for (int j = 0; j < offset; ++j)
	    {
	      _Jv_Method *meth_2 = _Jv_FromReflectedMethod (mp[j]);
	      if (_Jv_equalUtf8Consts (method->name, meth_2->name)
		  && _Jv_equalUtf8Consts (method->signature,
					  meth_2->signature))
		{
		  add = false;
		  break;
		}
	    }
	  if (! add)
	    continue;
	}

      if (result != NULL)
	{
	  using namespace java::lang::reflect;
	  Method *rmethod = new Method ();
	  rmethod->offset = (char *) method - (char *) methods;
	  rmethod->declaringClass = this;
	  Method **mp = elements (result);
	  mp[offset + count] = rmethod;
	}
      ++count;
    }
  offset += count;

  // Now examine superclasses.
  if (getSuperclass () != NULL)
    {
      jint s_count = getSuperclass()->_getMethods (result, offset);
      offset += s_count;
      count += s_count;
    }

  // Finally, examine interfaces.
  for (int i = 0; i < interface_count; ++i)
    {
      int f_count = interfaces[i]->_getMethods (result, offset);
      count += f_count;
      offset += f_count;
    }

  return count;
}

JArray<java::lang::reflect::Method *> *
java::lang::Class::getMethods (void)
{
  using namespace java::lang::reflect;

  // FIXME: security checks.

  // This will overestimate the size we need.
  jint count = _getMethods (NULL, 0);

  JArray<Method *> *result
    = ((JArray<Method *> *) JvNewObjectArray (count,
					      &Method::class$,
					      NULL));

  // When filling the array for real, we get the actual count.  Then
  // we resize the array.
  jint real_count = _getMethods (result, 0);

  if (real_count != count)
    {
      JArray<Method *> *r2
	= ((JArray<Method *> *) JvNewObjectArray (real_count,
						  &Method::class$,
						  NULL));
      
      Method **destp = elements (r2);
      Method **srcp = elements (result);

      for (int i = 0; i < real_count; ++i)
	*destp++ = *srcp++;

      result = r2;
    }

  return result;
}

jboolean
java::lang::Class::isAssignableFrom (jclass klass)
{
  // Arguments may not have been initialized, given ".class" syntax.
  _Jv_InitClass (this);
  _Jv_InitClass (klass);
  return _Jv_IsAssignableFrom (this, klass);
}

jboolean
java::lang::Class::isInstance (jobject obj)
{
  if (! obj)
    return false;
  _Jv_InitClass (this);
  return _Jv_IsAssignableFrom (this, JV_CLASS (obj));
}

jobject
java::lang::Class::newInstance (void)
{
  // FIXME: do accessibility checks here.  There currently doesn't
  // seem to be any way to do these.
  // FIXME: we special-case one check here just to pass a Plum Hall
  // test.  Once access checking is implemented, remove this.
  if (this == &java::lang::Class::class$)
    throw new java::lang::IllegalAccessException;

  if (isPrimitive ()
      || isInterface ()
      || isArray ()
      || java::lang::reflect::Modifier::isAbstract(accflags))
    throw new java::lang::InstantiationException;

  _Jv_InitClass (this);

  _Jv_Method *meth = _Jv_GetMethodLocal (this, init_name, void_signature);
  if (! meth)
    throw new java::lang::NoSuchMethodException;

  jobject r = JvAllocObject (this);
  ((void (*) (jobject)) meth->ncode) (r);
  return r;
}

void
java::lang::Class::finalize (void)
{
#ifdef INTERPRETER
  JvAssert (_Jv_IsInterpretedClass (this));
  _Jv_UnregisterClass (this);
#endif
}

// This implements the initialization process for a class.  From Spec
// section 12.4.2.
void
java::lang::Class::initializeClass (void)
{
  // short-circuit to avoid needless locking.
  if (state == JV_STATE_DONE)
    return;

  // Step 1.
  _Jv_MonitorEnter (this);

  if (state < JV_STATE_LINKED)
    {    
#ifdef INTERPRETER
      if (_Jv_IsInterpretedClass (this))
	{
	  // this can throw exceptions, so exit the monitor as a precaution.
	  _Jv_MonitorExit (this);
	  java::lang::ClassLoader::resolveClass0 (this);
	  _Jv_MonitorEnter (this);
	}
      else
#endif
        {
	  _Jv_PrepareCompiledClass (this);
	}
    }

  if (state <= JV_STATE_LINKED)
    _Jv_PrepareConstantTimeTables (this);

  // Step 2.
  java::lang::Thread *self = java::lang::Thread::currentThread();
  // FIXME: `self' can be null at startup.  Hence this nasty trick.
  self = (java::lang::Thread *) ((long) self | 1);
  while (state == JV_STATE_IN_PROGRESS && thread && thread != self)
    wait ();

  // Steps 3 &  4.
  if (state == JV_STATE_DONE || state == JV_STATE_IN_PROGRESS)
    {
      _Jv_MonitorExit (this);
      return;
    }

  // Step 5.
  if (state == JV_STATE_ERROR)
    {
      _Jv_MonitorExit (this);
      throw new java::lang::NoClassDefFoundError (getName());
    }

  // Step 6.
  thread = self;
  state = JV_STATE_IN_PROGRESS;
  _Jv_MonitorExit (this);

  // Step 7.
  if (! isInterface () && superclass)
    {
      try
	{
	  _Jv_InitClass (superclass);
	}
      catch (java::lang::Throwable *except)
	{
	  // Caught an exception.
	  _Jv_MonitorEnter (this);
	  state = JV_STATE_ERROR;
	  notifyAll ();
	  _Jv_MonitorExit (this);
	  throw except;
	}
    }

  // Steps 8, 9, 10, 11.
  try
    {
      _Jv_Method *meth = _Jv_GetMethodLocal (this, clinit_name,
					     void_signature);
      if (meth)
	((void (*) (void)) meth->ncode) ();
    }
  catch (java::lang::Throwable *except)
    {
      if (! java::lang::Error::class$.isInstance(except))
	{
	  try
	    {
	      except = new ExceptionInInitializerError (except);
	    }
	  catch (java::lang::Throwable *t)
	    {
	      except = t;
	    }
	}
      _Jv_MonitorEnter (this);
      state = JV_STATE_ERROR;
      notifyAll ();
      _Jv_MonitorExit (this);
      throw except;
    }

  _Jv_MonitorEnter (this);
  state = JV_STATE_DONE;
  notifyAll ();
  _Jv_MonitorExit (this);
}



//
// Some class-related convenience functions.
//

// Find a method declared in the class.  If it is not declared locally
// (or if it is inherited), return NULL.
_Jv_Method *
_Jv_GetMethodLocal (jclass klass, _Jv_Utf8Const *name,
		    _Jv_Utf8Const *signature)
{
  for (int i = 0; i < klass->method_count; ++i)
    {
      if (_Jv_equalUtf8Consts (name, klass->methods[i].name)
	  && _Jv_equalUtf8Consts (signature, klass->methods[i].signature))
	return &klass->methods[i];
    }
  return NULL;
}

_Jv_Method *
_Jv_LookupDeclaredMethod (jclass klass, _Jv_Utf8Const *name,
                          _Jv_Utf8Const *signature)
{