Intercept instantiate failure to add exception message.

Fix generation of projecting queries to avoid selecting the same property twice.
Optimize types outside of loop in find queries.
Avoid creating extra stream when executing queries.

Author: cezarfx

src/main/java/com/oracle/nosql/spring/data/core/NosqlTemplate.java

@@ -806,16 +806,17 @@ public <S, T> Iterable<T> find(
         Class<T> targetType,
         NosqlQuery query) {
 
+        Class entityType = entityInformation.getJavaType();
+        Class<?> typeToRead = targetType.isInterface() ||
+            targetType.isAssignableFrom(entityType)
+            ? entityType
+            : targetType;
+
         Iterable<MapValue> results = executeMapValueQuery(entityInformation,
             query);
 
         Stream<T> resStream = IterableUtil.getStreamFromIterable(results)
             .map(d -> {
-                Class entityType = entityInformation.getJavaType();
-                Class<?> typeToRead = targetType.isInterface() ||
-                    targetType.isAssignableFrom(entityType)
-                    ? entityType
-                    : targetType;
                 Object source = getConverter().read(typeToRead, d);
                 T result = targetType.isInterface()
                     ? projectionFactory.createProjection(targetType, source)
@@ -865,12 +866,7 @@ private  <T> Iterable<MapValue> executeMapValueQuery(
 
         log.debug("Q: {}", sql);
 //        System.out.println("Q: " + sql);
-        Iterable<MapValue> results = doQuery(qReq);
-
-        Stream<MapValue> resStream =
-            IterableUtil.getStreamFromIterable(results);
-
-        return IterableUtil.getIterableFromStream(resStream);
+        return doQuery(qReq);
     }
 
     private PreparedStatement getPreparedStatement(

src/main/java/com/oracle/nosql/spring/data/core/convert/MappingNosqlConverter.java

@@ -734,7 +734,12 @@ public <T> T getParameterValue(
                     return convertFieldValueToObject( value, prop);
                 }
             };
-        return instantiator.createInstance(entity, paramProvider);
+        try {
+            return instantiator.createInstance(entity, paramProvider);
+        } catch (RuntimeException e) {
+            throw new RuntimeException("Failed to instantiate entity type: " +
+                entity.getType() + ". Check available public constructors.", e);
+        }
     }
 
     private <E> void setPojoProperties(NosqlPersistentEntity<E> entity,

src/main/java/com/oracle/nosql/spring/data/core/query/CriteriaQuery.java

@@ -458,7 +458,7 @@ private String generateProjection(String idPropertyName) {
             return "*";
         }
 
-        List<String> inputProperties = returnedType.getInputProperties();
+        List<String> inputProperties = new ArrayList<>();
 
         final NosqlPersistentEntity<?> entity = (NosqlPersistentEntity<?>)
             mappingContext.getPersistentEntity(returnedType.getReturnedType());