Add Collection<Map<String,T>> support to QueryMapper.toType and test for it

querymapper/src/main/java/com/moparisthebest/jdbc/ResultSetMapper.java

@@ -470,7 +470,22 @@ public class ResultSetMapper implements RowMapperProvider {
 		if (returnType.isArray()) {
 			return toArray(rs, returnType.getComponentType(), arrayMaxLength, cal);
 		} else if (Collection.class.isAssignableFrom(returnType)) {
-			return toCollection(rs, returnType, (Class) type.getActualTypeArguments()[0], arrayMaxLength, cal);
+			final Type componentType = type.getActualTypeArguments()[0];
+			if(componentType instanceof ParameterizedType) {
+				final ParameterizedType parameterizedType = ((ParameterizedType) componentType);
+				final Type rawType = parameterizedType.getRawType();
+				if(rawType instanceof Class && Map.class.isAssignableFrom((Class)rawType)) {
+					final Type[] mapTypes = parameterizedType.getActualTypeArguments();
+					if (mapTypes.length == 2 && mapTypes[0].equals(String.class) && mapTypes[1] instanceof Class)
+						return toCollectionMap(rs, returnType, (Class) rawType, (Class) mapTypes[1]);
+				}
+			}
+			// if we didn't match above signature, try just a regular collection
+			if(componentType instanceof Class) {
+				return toCollection(rs, returnType, (Class) componentType, arrayMaxLength, cal);
+			}
+			// or give up...
+			throw new MapperException("unknown Collection type to map...");
 		} else if (Map.class.isAssignableFrom(returnType)) {
 			Type[] types = type.getActualTypeArguments();
 			if (types[1] instanceof ParameterizedType) { // for collectionMaps

test/src/main/java/com/moparisthebest/jdbc/codegen/QmDao.java

@@ -156,6 +156,9 @@ public interface QmDao extends JdbcMapper {
 	@SQL(bobTomMap)
 	List<CaseInsensitiveHashMap<String, String>> getBobTomMapCaseInsensitive() throws SQLException;
 
+	@SQL(bobTomMap)
+	List<CaseInsensitiveHashMap<String, String>> getBobTomMapCaseInsensitiveType() throws SQLException;
+
 	@SQL(selectThreePeople)
 	List<FieldPerson> getThreePeople(long personNo1, long personNo2, long personNo3) throws SQLException;
 

test/src/main/java/com/moparisthebest/jdbc/codegen/QueryMapperQmDao.java

@@ -233,11 +233,14 @@ public class QueryMapperQmDao implements QmDao {
 	@Override
 	@SuppressWarnings("unchecked")
 	public List<CaseInsensitiveHashMap<String, String>> getBobTomMapCaseInsensitive() throws SQLException {
-		// todo: ParameterizedTypeImpl cannot be cast to java.lang.Class
-		// return qm.toType(bobTomMap, new TypeReference<List<CaseInsensitiveHashMap<String, String>>>() {});
 		return (List<CaseInsensitiveHashMap<String, String>>)(Object)qm.toListMap(bobTomMap, CaseInsensitiveHashMap.class, String.class);
 	}
 
+	@Override
+	public List<CaseInsensitiveHashMap<String, String>> getBobTomMapCaseInsensitiveType() throws SQLException {
+		return qm.toType(bobTomMap, new TypeReference<List<CaseInsensitiveHashMap<String, String>>>() {});
+	}
+
 	@Override
 	public List<FieldPerson> getThreePeople(final long personNo1, final long personNo2, final long personNo3) throws SQLException {
 		return  qm.toList(selectThreePeople,

test/src/test/java/com/moparisthebest/jdbc/QueryMapperTest.java

@@ -417,6 +417,21 @@ public class QueryMapperTest {
 		assertEquals("tom", map.get("TOM"));
 	}
 
+	@Test
+	public void testCaseInsensitiveMapJdbcMapperType() throws Throwable {
+		final Map<String, String> map = qm.getBobTomMapCaseInsensitiveType().get(0);
+		assertEquals("bob", map.get("bob"));
+		assertEquals("bob", map.get("Bob"));
+		assertEquals("bob", map.get("BoB"));
+		assertEquals("bob", map.get("BOb"));
+		assertEquals("bob", map.get("BOB"));
+		assertEquals("tom", map.get("tom"));
+		assertEquals("tom", map.get("Tom"));
+		assertEquals("tom", map.get("ToM"));
+		assertEquals("tom", map.get("TOm"));
+		assertEquals("tom", map.get("TOM"));
+	}
+
 	@Test
 	public void testList() throws SQLException {
 		final List<FieldPerson> fromDb = qm.getThreePeople(people[0].getPersonNo(), people[1].getPersonNo(), people[2].getPersonNo());