Method findValue

src/main/java/net/juniper/netconf/XML.java:375–440

Finds the text value of an element in the XML hierarchy specified by the list. @param list A list of strings representing the XML path. Each entry corresponds to an XML tag. To apply a text filter, use "tag~text" syntax (e.g., "name~FPC 0 CPU"). For example, to extract <temp

(List<String> list)

     *         or if the element has no text content.
     */
    public String findValue(List<String> list) {
        if (list == null || list.isEmpty()) {
            return null;
        }

        Element nextElement = ownerDoc.getDocumentElement();
        boolean nextElementFound;
        for (int k=0; k<list.size(); k++) {
            nextElementFound = false;
            String nextElementName = list.get(k);
            if (!nextElementName.contains("~")) {
                NodeList nextElementList =
                        nextElement != null
                                ? nextElement.getElementsByTagName(nextElementName)
                                : null;
                if (nextElementList == null || nextElementList.getLength() == 0) {
                    logger.fine("Element '" + nextElementName + "' not found in findValue()");
                    return null;
                }

                /* If the next‑to‑next (n2n) element is a filter based on
                 * text value, then do the required filtering.
                 */
                String n2nString = null;
                if (k<list.size()-1)
                    n2nString = list.get(k+1);
                if (n2nString != null && n2nString.contains("~")) {
                    /* Since the n2n element is a filter based on text
                     * value( decided by '~')
                     * we now traverse the entire NodeList to find the
                     * correct nextElement
                     * based on the text value of the filter.
                     */
                    String n2nText = n2nString.substring(n2nString.
                            indexOf("~") + 1);
                    String n2nElementName = n2nString.substring(0,
                            n2nString.indexOf("~"));
                    for (int i=0; i<nextElementList.getLength(); i++) {
                        nextElement = (Element)nextElementList.item(i);
                        NodeList nodes = nextElement.getElementsByTagName(n2nElementName);
                        if (nodes.getLength() == 0) continue;
                        Element n2nElement = (Element) nodes.item(0);
                        if (n2nElement == null || n2nElement.getFirstChild() == null) continue;
                        String text = trim(n2nElement.getFirstChild().getNodeValue());
                        if (text.equals(n2nText)) {
                            nextElementFound = true;
                            break;
                        }
                    }
                    if (!nextElementFound)
                        return null;
                } else {
                    nextElement = (Element)nextElementList.item(0);
                }
            }
        }
        if (nextElement == null) {
            return null;