@Override public StatementsResultLRSResponse saveStatements(List<Statement> statements) { StatementsResultLRSResponse lrsResponse = new StatementsResultLRSResponse(); if (statements.isEmpty()) { lrsResponse.setSuccess(true); return lrsResponse; } ArrayNode rootNode = Mapper.getInstance().createArrayNode(); for (Statement statement : statements) { rootNode.add(statement.toJSONNode(getVersion())); } lrsResponse.setRequest(new HTTPRequest()); lrsResponse.getRequest().setResource("statements"); lrsResponse.getRequest().setMethod(HttpMethods.POST); lrsResponse.getRequest().setContentType("application/json"); try { lrsResponse .getRequest() .setContent(Mapper.getWriter(this.usePrettyJSON()).writeValueAsBytes(rootNode)); } catch (JsonProcessingException ex) { lrsResponse.setErrMsg("Exception: " + ex.toString()); return lrsResponse; } HTTPResponse response = makeSyncRequest(lrsResponse.getRequest()); int status = response.getStatus(); lrsResponse.setResponse(response); if (status == 200) { lrsResponse.setSuccess(true); lrsResponse.setContent(new StatementsResult()); try { Iterator it = Mapper.getInstance().readValue(response.getContent(), ArrayNode.class).elements(); for (int i = 0; it.hasNext(); ++i) { lrsResponse.getContent().getStatements().add(statements.get(i)); lrsResponse .getContent() .getStatements() .get(i) .setId(UUID.fromString(((JsonNode) it.next()).textValue())); } } catch (Exception ex) { lrsResponse.setErrMsg("Exception: " + ex.toString()); lrsResponse.setSuccess(false); } } else { lrsResponse.setSuccess(false); } return lrsResponse; }