Java tutorial
/* * $Id: ToolsRenameNodeAction.java,v 1.10 2004/10/27 17:03:51 tcurley Exp $ * * Copyright (C) 2004, Cladonia Ltd. All rights reserved. * * This software is the proprietary information of Cladonia Ltd. * Use is subject to license terms. */ package com.cladonia.xngreditor.actions; import java.awt.event.ActionEvent; import java.util.Vector; import javax.swing.AbstractAction; import javax.swing.SwingUtilities; import org.dom4j.Attribute; import org.dom4j.Element; import org.dom4j.Namespace; import org.dom4j.Node; import org.dom4j.QName; import com.cladonia.xngreditor.ExchangerEditor; import com.cladonia.xml.ExchangerDocument; import com.cladonia.xml.XAttribute; import com.cladonia.xml.XElement; import com.cladonia.xml.editor.Editor; import com.cladonia.xngreditor.MessageHandler; import com.cladonia.xngreditor.properties.ConfigurationProperties; import com.cladonia.xngreditor.ToolsRenameNodeDialog; /** * An action that can be used to Rename Node By XPath * * @version $Revision: 1.10 $, $Date: 2004/10/27 17:03:51 $ * @author Thomas Curley <tcurley@cladonia.com> */ public class ToolsRenameNodeAction extends AbstractAction { private static final boolean DEBUG = false; private ExchangerEditor parent = null; private Editor editor = null; private ConfigurationProperties props; private ToolsRenameNodeDialog dialog = null; /** * The constructor for the action which allows Rename Node By XPath * * @param parent the parent frame. */ public ToolsRenameNodeAction(ExchangerEditor parent, Editor editor, ConfigurationProperties props) { super("Rename Nodes ..."); this.parent = parent; this.props = props; //this.properties = props; putValue(MNEMONIC_KEY, new Integer('N')); putValue(SHORT_DESCRIPTION, "Rename Nodes ..."); } /** * Sets the current view. * * @param view the current view. */ public void setView(Object view) { if (view instanceof Editor) { editor = (Editor) view; } else { editor = null; } setDocument(parent.getDocument()); } public void setDocument(ExchangerDocument doc) { if (doc != null && doc.isXML()) { setEnabled(editor != null); } else { setEnabled(false); } } /** * The implementation of the validate action, called * after a user action. * * @param event the action event. */ public void actionPerformed(ActionEvent event) { if (dialog == null) { dialog = new ToolsRenameNodeDialog(parent, props); } //called to make sure that the model is up to date to //prevent any problems found when undo-ing etc. parent.getView().updateModel(); //get the document final ExchangerDocument document = parent.getDocument(); if (document.isError()) { MessageHandler.showError(parent, "Please make sure the document is well-formed.", "Parser Error"); return; } //create temporary document String currentXPath = null; Node node = (Node) document.getLastNode(parent.getView().getEditor().getCursorPosition(), true); if (props.isUniqueXPath()) { currentXPath = node.getUniquePath(); } else { currentXPath = node.getPath(); } dialog.show(currentXPath); if (!dialog.isCancelled()) { //get the new vector of namespaces //Vector newNamespaces = dialog.getNamespaces(); parent.setWait(true); parent.setStatus("Renaming Nodes ..."); // Run in Thread!!! Runnable runner = new Runnable() { public void run() { try { ExchangerDocument tempDoc = new ExchangerDocument(document.getText()); String newString = renameByXPath(tempDoc, dialog.xpathPanel.getXpathPredicate(), dialog.getNewName()); if (newString != null) { //need to parse the new document to make sure that it //will produce well-formed xml. ExchangerDocument newDocument = new ExchangerDocument(newString); boolean createDocument = true; if (newDocument.isError()) { int questionResult = MessageHandler.showConfirm(parent, "The resulting document will not be well-formed\n" + "Do you wish to continue?"); if (questionResult == MessageHandler.CONFIRM_NO_OPTION) { createDocument = false; } } if (createDocument) { if (dialog.toNewDocumentRadio.isSelected()) { //user has selected to create the result as a new document parent.open(newDocument, null); } else { parent.getView().getEditor().setText(newString); SwingUtilities.invokeLater(new Runnable() { public void run() { parent.switchToEditor(); parent.getView().updateModel(); } }); } } } } catch (Exception e) { // This should never happen, just report and continue MessageHandler.showError(parent, "Cannot Rename Nodes", "Tools Rename Node Error"); } finally { parent.setStatus("Done"); parent.setWait(false); } } }; // Create and start the thread ... Thread thread = new Thread(runner); thread.start(); // } } } private String renameByXPath(ExchangerDocument document, String xpathPredicate, String newName) throws Exception { //List nodeList = document.getDocument().selectNodes( xpathPredicate ); Vector nodeList = document.search(xpathPredicate); try { for (int cnt = 0; cnt < nodeList.size(); ++cnt) { Node node = (Node) nodeList.get(cnt); // node.setName(newName); if (node instanceof Element) { XElement e = (XElement) node; e.setQName(new QName(newName, e.getNamespace())); } else if (node instanceof Attribute) { XAttribute newAtt = (XAttribute) node; /*int fcnt = findInList(newAtt,attributeList); if(fcnt > -1) {*/ //if the attribute matches the one we are looking for //replace it with the new qname String name = newAtt.getName(); String oldValue = newAtt.getValue(); Namespace ns = newAtt.getNamespace(); XElement parent = (XElement) node.getParent(); parent.remove(newAtt); parent.add(new XAttribute(new QName(newName, ns), oldValue)); //now remove it from the attributeList to speed up the next searches //attributeList.remove(fcnt); //} //attributeList.add((XAttribute) node); } } } catch (NullPointerException e) { MessageHandler.showError(parent, "XPath: " + xpathPredicate + "\nCannot be resolved", "Tools Rename Node Error"); return (null); } catch (Exception e) { MessageHandler.showError(parent, "Cannot Rename Node", "Tools Rename Node Error"); return (null); } document.update(); return document.getText(); } }