Examples with InputElementType org.wso2.carbon.humantask.rendering.api.InputElementType used on opensource projects

Example 1 with InputElementType

use of org.wso2.carbon.humantask.rendering.api.InputElementType in project carbon-business-process by wso2.

the class HTRenderingApiImpl method getRenderingInputElements.

/**
 * @param taskIdentifier : interested task identifier
 * @return set of input renderings wrapped within InputType
 * @throws IllegalArgumentFault : error occured while retrieving renderings from task definition
 * @throws IOException          If an error occurred while reading from the input source
 * @throws SAXException         If the content in the input source is invalid
 */
private InputType getRenderingInputElements(URI taskIdentifier) throws IllegalArgumentFault, IOException, SAXException, IllegalOperationFault, IllegalAccessFault, IllegalStateFault, XPathExpressionException {
    // TODO Chaching : check cache against task id for input renderings
    QName renderingType = new QName(htRenderingNS, "input", "wso2");
    String inputRenderings = (String) taskOps.getRendering(taskIdentifier, renderingType);
    // Create input element
    InputType renderingInputs = null;
    // check availability of input renderings
    if (inputRenderings != null && inputRenderings.length() > 0) {
        // parse input renderings
        Element inputRenderingsElement = DOMUtils.stringToDOM(inputRenderings);
        // retrieve input elements
        NodeList inputElementList = inputRenderingsElement.getElementsByTagNameNS(htRenderingNS, "element");
        Element taskInputMsgElement = DOMUtils.stringToDOM((String) taskOps.getInput(taskIdentifier, null));
        if (inputElementList != null && inputElementList.getLength() > 0) {
            // hold number of input element
            int inputElementNum = inputElementList.getLength();
            InputElementType[] inputElements = new InputElementType[inputElementNum];
            for (int i = 0; i < inputElementNum; i++) {
                Element tempElement = (Element) inputElementList.item(i);
                String label = tempElement.getElementsByTagNameNS(htRenderingNS, "label").item(0).getTextContent();
                String value = tempElement.getElementsByTagNameNS(htRenderingNS, "value").item(0).getTextContent();
                // if the value starts with '/' then considered as an xpath and evaluate over received Input Message
                if (value.startsWith("/") && taskInputMsgElement != null) {
                    // value represents xpath. evaluate against the input message
                    String xpathValue = evaluateXPath(value, taskInputMsgElement, inputRenderingsElement.getOwnerDocument());
                    if (xpathValue != null) {
                        value = xpathValue;
                    }
                }
                inputElements[i] = new InputElementType();
                inputElements[i].setLabel(label);
                inputElements[i].setValue(value);
            }
            renderingInputs = new InputType();
            renderingInputs.setElement(inputElements);
        // TODO cache renderingInputs against task instance id
        }
    }
    return renderingInputs;
}