1 files changed, 108 insertions, 0 deletions
diff --git a/src/uscxml/plugins/datamodel/null/NullDataModel.cpp b/src/uscxml/plugins/datamodel/null/NullDataModel.cpp
new file mode 100644
index 0000000..efa77fa
--- /dev/null
+++ b/src/uscxml/plugins/datamodel/null/NullDataModel.cpp
@@ -0,0 +1,108 @@
+/**
+ *  @file
+ *  @author     2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
+ *  @copyright  Simplified BSD
+ *
+ *  @cond
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the FreeBSD license as published by the FreeBSD
+ *  project.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *  You should have received a copy of the FreeBSD license along with this
+ *  program. If not, see <http://www.opensource.org/licenses/bsd-license>.
+ *  @endcond
+ */
+
+#include <boost/algorithm/string.hpp>
+
+#include "uscxml/Common.h"
+#include "NullDataModel.h"
+#include "uscxml/util/DOM.h"
+
+#ifdef BUILD_AS_PLUGINS
+#include <Pluma/Connector.hpp>
+#endif
+
+namespace uscxml {
+
+#ifdef BUILD_AS_PLUGINS
+PLUMA_CONNECTOR
+bool pluginConnect(pluma::Host& host) {
+	host.add( new NullDataModelProvider() );
+	return true;
+}
+#endif
+
+NullDataModel::NullDataModel() {
+}
+
+std::shared_ptr<DataModelImpl> NullDataModel::create(DataModelCallbacks* callbacks) {
+	std::shared_ptr<NullDataModel> dm(new NullDataModel());
+	dm->_callbacks = callbacks;
+	return dm;
+}
+
+NullDataModel::~NullDataModel() {
+}
+
+Data NullDataModel::getAsData(const std::string& content) {
+	Data data = Data::fromJSON(content);
+	if (data.empty()) {
+		data = Data(content, Data::VERBATIM);
+	}
+	return data;
+}
+
+/**
+ * The boolean expression language consists of the In predicate only. It has the
+ * form 'In(id)', where id is the id of a state in the enclosing state machine.
+ * The predicate must return 'true' if and only if that state is in the current
+ * state configuration.
+ */
+bool NullDataModel::evalAsBool(const XERCESC_NS::DOMElement* scriptNode, const std::string& expr) {
+	std::string trimmedExpr = expr;
+	boost::trim(trimmedExpr);
+	if (!boost::istarts_with(trimmedExpr, "in"))
+		return false;
+
+	// find string in between brackets
+	size_t start = trimmedExpr.find_first_of("(");
+	size_t end = trimmedExpr.find_last_of(")");
+	if (start == std::string::npos || end == std::string::npos || start >= end)
+		return false;
+	start++;
+
+	// split at comma
+	std::stringstream ss(trimmedExpr.substr(start, end - start));
+	std::list<std::string> stateExprs;
+	std::string item;
+	while(std::getline(ss, item, ',')) {
+		stateExprs.push_back(item);
+	}
+
+	for (std::list<std::string>::const_iterator stateIter = stateExprs.begin(); stateIter != stateExprs.end(); stateIter++) {
+		// remove ticks
+		size_t start = stateIter->find_first_of("'");
+		size_t end = stateIter->find_last_of("'");
+
+		std::string stateName;
+		if (start != std::string::npos && end != std::string::npos && start < end) {
+			start++;
+			stateName = stateIter->substr(start, end - start);
+		} else {
+			stateName = *stateIter;
+		}
+
+		if (_callbacks->isInState(stateName)) {
+			continue;
+		}
+		return false;
+	}
+	return true;
+}
+
+}