[#294] We now can disable previous row injection

s-pipes-modules/module-sparql-endpoint/src/main/java/cz/cvut/spipes/modules/ApplyConstructWithChunkedValuesModule.java

@@ -48,6 +48,7 @@ public class ApplyConstructWithChunkedValuesModule extends ApplyConstructAbstrac
     private static final String TYPE_URI = KBSS_MODULE.uri + "apply-construct-with-chunked-values";
     private static final String TYPE_PREFIX = TYPE_URI + "/";
     private static final int DEFAULT_CHUNK_SIZE = 10;
+    private static final boolean DEFAULT_USE_PREVIOUS_BINDING_VALUE = true;
     private static final String VALUES_CLAUSE_MARKER_NAME = "VALUES";
     private static final Property P_CHUNK_SIZE = ResourceFactory.createProperty(TYPE_PREFIX + "chunk-size");
 
@@ -58,6 +59,9 @@ public class ApplyConstructWithChunkedValuesModule extends ApplyConstructAbstrac
         comment = "The select query that will be used to iterate over construct query templates.")
     private Select selectQuery;
 
+    @Parameter(iri = TYPE_PREFIX + "enable-previous-binding", comment = "Default is true.")
+    private boolean UsePreviousBinding = DEFAULT_USE_PREVIOUS_BINDING_VALUE;
+
 
     private ResultSet selectResultSet;
 
@@ -91,7 +95,10 @@ public void initializeQuery() {
 
         log.debug("Executing query of chunk provider ...");
 
-        selectResultSet = new OneStepBackExtendedResultSet(execution.execSelect());
+        if (UsePreviousBinding)
+            selectResultSet = new OneStepBackExtendedResultSet(execution.execSelect());
+        else
+            selectResultSet = execution.execSelect();
 
         if (! selectResultSet.hasNext()) {
             log.debug("\"{}\" query did not return any values.", getLabel());