Example usage for org.dom4j DocumentHelper sort

Introduction

In this page you can find the example usage for org.dom4j DocumentHelper sort.

Prototype

public static void sort(List<Node> list, String expression, boolean distinct) 

Source Link

Document

sort sorts the given List of Nodes using an XPath expression as a java.util.Comparator and optionally removing duplicates.

Usage

From source file:com.cladonia.xngreditor.actions.ToolsSortNodeAction.java

License:Open Source License

private String sortByXPath(ExchangerDocument document, String xpathPredicate, String sortXPathPredicate,
        boolean isAscending) throws Exception {

    //List nodeList = document.getDocument().selectNodes(xpathPredicate);
    Vector nodeList = document.search(xpathPredicate);

    try {/* ww  w . ja va 2s  .c om*/
        Vector nodes = new Vector();
        if (nodeList.size() != 0) {
            this.originalCounter = 0;
            treeWalk(document, nodeList, nodes);

            //              get the sorted list
            DocumentHelper.sort(nodeList, sortXPathPredicate, false);
            //now update nodeinfo's with the sorted order

            for (int ocnt = 0; ocnt < nodeList.size(); ++ocnt) {

                //for each node in the sorted list,
                //find it in the nodeInfo list and set the sorted index
                Node node = (Node) nodeList.get(ocnt);

                for (int cnt = 0; cnt < nodes.size(); ++cnt) {
                    NodeInfo ni = (NodeInfo) nodes.get(cnt);
                    if (node == ni.getNode()) {
                        if (isAscending) {
                            ni.setSortedId(ocnt);
                        } else {
                            int id = (nodeList.size() - 1) - ocnt;
                            ni.setSortedId(id);
                        }
                        nodes.setElementAt(ni, cnt);
                    }
                }
            }
            // now need to remove all duplicates of this element from the
            // document

            //check for children of parents in the list
            if (checkForChildrenOfParents(nodes) == false) {
                removeOccurences(xpathPredicate, document);
                nodes = sortIndexes(nodes, isAscending);

                insertNodes(document, nodes, isAscending);
            } else {
                //error children and parents mixed
                MessageHandler.showError(parent,
                        "Cannot Sort: XPath: " + xpathPredicate + " refers to both children and parents",
                        "Tools Sort Node Error");
                return (null);
            }
        } else {
            MessageHandler.showError(parent,
                    "XPath: " + xpathPredicate + " and " + sortXPathPredicate + "\nCannot be resolved",
                    "Tools Sort Node Error");
            //e.printStackTrace();
            return (null);
        }
    } catch (NullPointerException e) {
        MessageHandler.showError(parent, "XPath: " + xpathPredicate + "\nCannot be resolved",
                "Tools Sort Node Error");
        //e.printStackTrace();
        return (null);
    } catch (Exception e) {
        MessageHandler.showError(parent, "Cannot Sort Nodes", "Tools Sort Node Error");
        //e.printStackTrace();
        return (null);
    }
    document.update();
    return document.getText();
}

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From source file:com.liferay.portal.xml.SAXReaderImpl.java

License:Open Source License

public void sort(List<Node> nodes, String xPathExpression, boolean distinct) {

    DocumentHelper.sort(toOldNodes(nodes), xPathExpression, distinct);
}

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