data: Fixed version check when opening older db

src/lib/data/SqliteStorage.cpp

@@ -11,7 +11,6 @@
 SqliteStorage::SqliteStorage(const std::string& dbFilePath)
 {
 	m_database.open(dbFilePath.c_str());
-	setup();
 }
 
 SqliteStorage::~SqliteStorage()
@@ -19,6 +18,26 @@ SqliteStorage::~SqliteStorage()
 	m_database.close();
 }
 
+bool SqliteStorage::init()
+{
+	Version version = getVersion();
+
+	if (version.isEmpty())
+	{
+		setup();
+		return false;
+	}
+	else if (version.isOlderStorageVersionThan(Version::getApplicationVersion()))
+	{
+		clear();
+		return false;
+	}
+	else
+	{
+		return true;
+	}
+}
+
 void SqliteStorage::setup()
 {
 	m_database.execDML("PRAGMA foreign_keys=ON;");
@@ -688,8 +707,8 @@ void SqliteStorage::setupTables()
 			"defined INTEGER NOT NULL, "
 			"PRIMARY KEY(id), "
 			"FOREIGN KEY(id) REFERENCES element(id) ON DELETE CASCADE);"
-	);	
-	
+	);
+
 	m_database.execDML(
 		"CREATE INDEX IF NOT EXISTS node_serializedName_index ON node(serializedName);"
 	);

src/lib/data/SqliteStorage.h

@@ -23,6 +23,7 @@ public:
 	SqliteStorage(const std::string& dbFilePath);
 	~SqliteStorage();
 
+	bool init();
 	void setup();
 	void clear();
 

src/lib/data/Storage.cpp

@@ -9,6 +9,7 @@
 #include "utility/TimePoint.h"
 #include "utility/utility.h"
 #include "utility/utilityString.h"
+#include "utility/Version.h"
 
 #include "data/graph/token_component/TokenComponentAggregation.h"
 #include "data/graph/token_component/TokenComponentSignature.h"
@@ -22,7 +23,6 @@
 #include "data/parser/ParseVariable.h"
 #include "data/type/DataType.h"
 #include "settings/ApplicationSettings.h"
-#include "utility/Version.h"
 
 Storage::Storage(const FilePath& dbPath)
 	: m_sqliteStorage(dbPath.str())
@@ -38,6 +38,11 @@ Version Storage::getVersion() const
 	return m_sqliteStorage.getVersion();
 }
 
+bool Storage::init()
+{
+	return m_sqliteStorage.init();
+}
+
 void Storage::clear()
 {
 	m_sqliteStorage.clear();
@@ -761,7 +766,7 @@ Id Storage::getIdForNodeWithNameHierarchy(const NameHierarchy& nameHierarchy) co
 
 Id Storage::getIdForEdge(
 	Edge::EdgeType type, const NameHierarchy& fromNameHierarchy, const NameHierarchy& toNameHierarchy
-) const 
+) const
 {
 	Id sourceId = getIdForNodeWithNameHierarchy(fromNameHierarchy);
 	Id targetId = getIdForNodeWithNameHierarchy(toNameHierarchy);

src/lib/data/Storage.h

@@ -24,6 +24,7 @@ public:
 
 	Version getVersion() const;
 
+	bool init();
 	void clear();
 	void clearCaches();