| /******************************************************************************* |
| * Copyright (c) 2006 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.jdt.internal.launching.support; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| import javax.xml.parsers.DocumentBuilder; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.transform.OutputKeys; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMSource; |
| import javax.xml.transform.stream.StreamResult; |
| |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Evaluates system properties passed as program arguments. |
| * |
| * @since 3.2 |
| */ |
| public class SystemProperties { |
| |
| public static void main(String[] args) { |
| try { |
| Document doc = newDocument(); |
| Element properties = doc.createElement("systemProperties"); //$NON-NLS-1$ |
| doc.appendChild(properties); |
| for (int i = 0; i < args.length; i++) { |
| String name = args[i]; |
| String value = System.getProperty(name); |
| if (value != null) { |
| Element property = doc.createElement("property"); //$NON-NLS-1$ |
| property.setAttribute("name", name); //$NON-NLS-1$ |
| property.setAttribute("value", value); //$NON-NLS-1$ |
| properties.appendChild(property); |
| } |
| } |
| String text = serializeDocument(doc); |
| System.out.print(text); |
| } catch (ParserConfigurationException e) { |
| } catch (IOException e) { |
| } catch (TransformerException e) { |
| } |
| } |
| |
| /** |
| * Returns a a new XML document |
| * @return document |
| * @throws ParserConfigurationException if an exception occurs creating the document builder |
| */ |
| private static Document newDocument() throws ParserConfigurationException { |
| DocumentBuilderFactory dfactory= DocumentBuilderFactory.newInstance(); |
| DocumentBuilder docBuilder= dfactory.newDocumentBuilder(); |
| Document doc= docBuilder.newDocument(); |
| return doc; |
| } |
| |
| /** |
| * Serializes a XML document into a string - encoded in UTF8 format, |
| * with platform line separators. |
| * |
| * @param doc document to serialize |
| * @return the document as a string |
| */ |
| private static String serializeDocument(Document doc) throws IOException, TransformerException { |
| ByteArrayOutputStream s= new ByteArrayOutputStream(); |
| |
| TransformerFactory factory= TransformerFactory.newInstance(); |
| Transformer transformer= factory.newTransformer(); |
| transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$ |
| transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$ |
| |
| DOMSource source= new DOMSource(doc); |
| StreamResult outputTarget= new StreamResult(s); |
| transformer.transform(source, outputTarget); |
| |
| return s.toString("UTF8"); //$NON-NLS-1$ |
| } |
| } |