Examples with ExpressionLanguageRuntime org.wso2.carbon.humantask.core.engine.runtime.api.ExpressionLanguageRuntime used on opensource projects

Example 6 with ExpressionLanguageRuntime

use of org.wso2.carbon.humantask.core.engine.runtime.api.ExpressionLanguageRuntime in project carbon-business-process by wso2.

the class ExpressionBasedOrgEntityProvider method getOrganizationalEntities.

public List<OrganizationalEntityDAO> getOrganizationalEntities(PeopleQueryEvaluator peopleQueryEvaluator, TFrom tFrom, EvaluationContext evaluationContext) {
    String expression = tFrom.newCursor().getTextValue().trim();
    log.debug("Evaluating expression " + expression + " for ExpressionBasedOrgEntityProvider");
    String expLang = (tFrom.getExpressionLanguage() == null) ? HumanTaskConstants.WSHT_EXP_LANG_XPATH20 : tFrom.getExpressionLanguage();
    ExpressionLanguageRuntime expLangRuntime = HumanTaskServiceComponent.getHumanTaskServer().getTaskEngine().getExpressionLanguageRuntime(expLang);
    List list = expLangRuntime.evaluate(expression, evaluationContext);
    List<OrganizationalEntityDAO> orgEntityList = new ArrayList<OrganizationalEntityDAO>();
    if (list.isEmpty() || list.size() > 1) {
        log.debug(" Organizational Entities evaluated to null or multiple list");
        return orgEntityList;
    }
    // Returned list should evaluate to an organizationalEntity or a user
    for (Object item : list) {
        if (item instanceof NodeList) {
            for (int i = 0; i < ((NodeList) item).getLength(); i++) {
                Node node = ((NodeList) item).item(i);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    if (node.getLocalName().equals(HumanTaskConstants.userQname.getLocalPart()) && node.getNamespaceURI().equals(HumanTaskConstants.userQname.getNamespaceURI())) {
                        CommonTaskUtil.addOrgEntityForUserNode(node, peopleQueryEvaluator, orgEntityList);
                    } else if (node.getLocalName().equals(HumanTaskConstants.groupQname.getLocalPart()) && node.getNamespaceURI().equals(HumanTaskConstants.groupQname.getNamespaceURI())) {
                        CommonTaskUtil.addOrgEntityForGroupNode(node, peopleQueryEvaluator, orgEntityList);
                    } else if (node.getLocalName().equals("wrapper")) {
                        // Expression evaluator wraps the string with wrapper element name
                        CommonTaskUtil.addOrgEntityForUserNode(node, peopleQueryEvaluator, orgEntityList);
                    } else if (node.getLocalName().equals(HumanTaskConstants.organizationalEntityQname.getLocalPart()) && node.getNamespaceURI().equals(HumanTaskConstants.organizationalEntityQname.getNamespaceURI())) {
                        // This is an organizational Entity node, hence parse it as org entity
                        // Most probably this logic wont be required
                        CommonTaskUtil.addOrgEntitiesForOrganizationEntityNode(node, peopleQueryEvaluator, orgEntityList);
                    }
                } else if (node.getNodeType() == Node.TEXT_NODE) {
                    String nodeValue = node.getNodeValue().trim();
                    if (nodeValue.length() > 0) {
                        OrganizationalEntityDAO userOrgEntityForName = peopleQueryEvaluator.createUserOrgEntityForName(nodeValue);
                        if (userOrgEntityForName != null) {
                            orgEntityList.add(userOrgEntityForName);
                        }
                    }
                }
            }
        }
    }
    return orgEntityList;
}