C++ Persistent::Has方法代码示例

MatchCreator::Description ScriptMatchCreator::_getScriptDescription(QString path) const
{
  MatchCreator::Description result;
  result.experimental = true;

  shared_ptr<PluginContext> script(new PluginContext());
  HandleScope handleScope;
  Context::Scope context_scope(script->getContext());
  script->loadScript(path, "plugin");

  Persistent<Object> plugin = ScriptMatchVisitor::getPlugin(script);
  Handle<String> descriptionStr = String::New("description");
  if (plugin->Has(descriptionStr))
  {
    Handle<v8::Value> value = plugin->Get(descriptionStr);
    result.description = toCpp<QString>(value);
  }
  Handle<String> experimentalStr = String::New("experimental");
  if (plugin->Has(experimentalStr))
  {
    Handle<v8::Value> value = plugin->Get(experimentalStr);
    result.experimental = toCpp<bool>(value);
  }

  QFileInfo fi(path);
  result.className = (QString::fromStdString(className()) + "," + fi.fileName()).toStdString();

  return result;
}

  /*
   * This is meant to run one time when the match creator is initialized.
   */
  void customScriptInit()
  {
    Context::Scope context_scope(_script->getContext());
    HandleScope handleScope;

    Persistent<Object> plugin = getPlugin();
    Handle<String> initStr = String::New("init");
    if (plugin->Has(initStr) == false)
    {
      throw HootException("Error finding 'init' function.");
    }
    Handle<v8::Value> value = plugin->Get(initStr);
    if (value->IsFunction() == false)
    {
      throw HootException("init is not a function.");
    }

    Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(value);
    Handle<Value> jsArgs[1];
    int argc = 0;
    HandleScope scope;
    assert(_map.get());
    OsmMapPtr copiedMap(new OsmMap(_map));
    jsArgs[argc++] = OsmMapJs::create(copiedMap);

    func->Call(plugin, argc, jsArgs);

    //this is meant to have been set externally in a js rules file
    _searchRadius = getNumber(plugin, "searchRadius", -1.0, 15.0);
  }

  bool isMatchCandidate(ConstElementPtr e)
  {
    Context::Scope context_scope(_script->getContext());
    HandleScope handleScope;
    Persistent<Object> plugin = getPlugin();
    Handle<String> isMatchCandidateStr = String::New("isMatchCandidate");
    if (plugin->Has(isMatchCandidateStr) == false)
    {
      throw HootException("Error finding 'isMatchCandidate' function.");
    }
    Handle<v8::Value> value = plugin->Get(isMatchCandidateStr);
    if (value->IsFunction() == false)
    {
      throw HootException("isMatchCandidate is not a function.");
    }
    Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(value);
    Handle<Value> jsArgs[2];

    int argc = 0;
    jsArgs[argc++] = OsmMapJs::create(_map);
    jsArgs[argc++] = ElementJs::New(e);

    Handle<Value> f = func->Call(plugin, argc, jsArgs);

    return f->BooleanValue();
  }

static Handle<Value> TitaniumCountlyAndroidMessaging_getBinding(const Arguments& args)
{
	HandleScope scope;

	if (args.Length() == 0) {
		return ThrowException(Exception::Error(String::New("TitaniumCountlyAndroidMessaging.getBinding requires 1 argument: binding")));
	}

	if (bindingCache.IsEmpty()) {
		bindingCache = Persistent<Object>::New(Object::New());
	}

	Handle<String> binding = args[0]->ToString();

	if (bindingCache->Has(binding)) {
		return bindingCache->Get(binding);
	}

	String::Utf8Value bindingValue(binding);

	LOGD(TAG, "Looking up binding: %s", *bindingValue);

	titanium::bindings::BindEntry *extBinding = ::TitaniumCountlyAndroidMessagingBindings::lookupGeneratedInit(
		*bindingValue, bindingValue.length());

	if (!extBinding) {
		LOGE(TAG, "Couldn't find binding: %s, returning undefined", *bindingValue);
		return Undefined();
	}

	Handle<Object> exports = Object::New();
	extBinding->bind(exports);
	bindingCache->Set(binding, exports);

	return exports;
}