private SolrInputDocument buildDocument(ITuple tuple) {

        SolrInputDocument doc = new SolrInputDocument();



        for (String tupleField : tuple.getFields()) {

            FieldTypeWrapper fieldTypeWrapper = typeFinder.getFieldTypeWrapper(tupleField);

            if (fieldTypeWrapper != null) {

                FieldType fieldType = fieldTypeWrapper.getType();

                if (fieldType.isMultiValued()) {

                    addMultivalueFieldToDoc(doc, tupleField, tuple);

                } else {

                    addFieldToDoc(doc, tupleField, tuple);

                }

            } else {

                log.debug("Field [{}] does NOT match static or dynamic field declared in schema. Not added to document", tupleField);

            }

        }

        return doc;

    }