| /******************************************************************************* |
| * Copyright (c) 2010, 2011 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.server.core.internal; |
| |
| import java.io.File; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMSource; |
| import javax.xml.transform.stream.StreamResult; |
| |
| import org.eclipse.core.runtime.preferences.IEclipsePreferences; |
| import org.eclipse.core.runtime.preferences.InstanceScope; |
| import org.eclipse.core.runtime.preferences.PreferenceModifyListener; |
| import org.osgi.service.prefs.Preferences; |
| import org.w3c.dom.*; |
| import org.xml.sax.InputSource; |
| |
| public class ServerPreferenceModifyListener extends PreferenceModifyListener { |
| |
| private static final String LOCKED_ATTRIBUTE_NAME = "locked"; //$NON-NLS-1$ |
| private static final String RUNTIMES_PREFERENCE_NAME = "runtimes"; //$NON-NLS-1$ |
| private static final String RUNTIME_NODE_NAME = "runtime"; //$NON-NLS-1$ |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.core.runtime.preferences.PreferenceModifyListener#preApply(org.eclipse.core.runtime.preferences.IEclipsePreferences) |
| */ |
| public IEclipsePreferences preApply(IEclipsePreferences node) { |
| Preferences instance = node.node(InstanceScope.SCOPE); |
| Preferences runtimes = instance.node(ServerPlugin.PLUGIN_ID); |
| if (runtimes != null) |
| removeLockedServerRuntimePreference(runtimes); //$NON-NLS-1$ |
| return super.preApply(node); |
| } |
| |
| private void removeLockedServerRuntimePreference(Preferences preferences) { |
| try { |
| File prefFile = new File(preferences.get(RUNTIMES_PREFERENCE_NAME, "")); |
| if (!prefFile.exists()){ |
| return; |
| } |
| |
| Document doc = DocumentBuilderFactory.newInstance() |
| .newDocumentBuilder().parse(new InputSource(new StringReader(prefFile.toString()))); //$NON-NLS-1$ |
| NodeList nodeList = doc.getElementsByTagName(RUNTIME_NODE_NAME); |
| for (int s = 0; s < nodeList.getLength(); s++) { |
| Node node = nodeList.item(s); |
| if (node.getNodeType() == Node.ELEMENT_NODE) { |
| NamedNodeMap attributes = node.getAttributes(); |
| Node locked = attributes.getNamedItem(LOCKED_ATTRIBUTE_NAME); |
| if (locked != null && Boolean.parseBoolean(locked.getNodeValue())) |
| node.getParentNode().removeChild(node); |
| } |
| } |
| StringWriter runtimes = new StringWriter(); |
| TransformerFactory.newInstance().newTransformer().transform(new DOMSource(doc), new StreamResult(runtimes)); |
| preferences.remove(RUNTIMES_PREFERENCE_NAME); |
| preferences.put(RUNTIMES_PREFERENCE_NAME, runtimes.toString()); |
| } catch (Exception e) { |
| //there is no defined runtime environment |
| return; |
| } |
| |
| } |
| |
| } |