Add HasClassRegistry static method isRegisteredType.

Return true when given name is registered string type or its alias.

Author: pavoljuhas

src/diffpy/HasClassRegistry.hpp

@@ -64,6 +64,9 @@ class HasClassRegistry
         /// Create new instance of a specified string type.
         static SharedPtr createByType(const std::string& tp);
 
+        /// Return true if string is a registered string type or its alias.
+        static bool isRegisteredType(const std::string& tp);
+
         /// Return a set of all registered string types
         static std::set<std::string> getRegisteredTypes();
 

src/diffpy/HasClassRegistry.ipp

@@ -96,6 +96,15 @@ HasClassRegistry<TBase>::createByType(const std::string& tp)
 }
 
 
+template <class TBase>
+bool
+HasClassRegistry<TBase>::isRegisteredType(const std::string& tp)
+{
+    const RegistryStorage& reg = getRegistry();
+    return reg.count(tp);
+}
+
+
 template <class TBase>
 std::set<std::string>
 HasClassRegistry<TBase>::getRegisteredTypes()

src/tests/TestHasClassRegistry.hpp

@@ -0,0 +1,56 @@
+/*****************************************************************************
+*
+* libdiffpy         Complex Modeling Initiative
+*                   (c) 2016 Brookhaven Science Associates,
+*                   Brookhaven National Laboratory.
+*                   All rights reserved.
+*
+* File coded by:    Pavol Juhas
+*
+* See AUTHORS.txt for a list of people who contributed.
+* See LICENSE.txt for license information.
+*
+******************************************************************************
+*
+* class TestHasClassRegistry -- test registration machinery for named classes.
+*
+*****************************************************************************/
+
+#include <cxxtest/TestSuite.h>
+
+#include <diffpy/srreal/ScatteringFactorTable.hpp>
+
+using diffpy::srreal::ScatteringFactorTable;
+using diffpy::srreal::ScatteringFactorTablePtr;
+
+//////////////////////////////////////////////////////////////////////////////
+// class TestHasClassRegistry
+//////////////////////////////////////////////////////////////////////////////
+
+class TestHasClassRegistry : public CxxTest::TestSuite
+{
+    private:
+
+        typedef diffpy::HasClassRegistry<ScatteringFactorTable> HCRBase;
+        ScatteringFactorTablePtr msftb;
+        HCRBase* mpreg;
+
+    public:
+
+        void setUp()
+        {
+            msftb = ScatteringFactorTable::createByType("xray");
+            mpreg = msftb.get();
+        }
+
+
+        void test_isRegisteredType()
+        {
+            TS_ASSERT(msftb->isRegisteredType("xray"));
+            TS_ASSERT(ScatteringFactorTable::isRegisteredType("X"));
+            TS_ASSERT_EQUALS(false, mpreg->isRegisteredType("invalid"));
+        }
+
+};  // class TestHasClassRegistry
+
+// End of file