| /******************************************************************************* |
| * Copyright (c) 2003, 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.osgi.framework.debug; |
| |
| import java.io.*; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Iterator; |
| import java.util.Properties; |
| import org.eclipse.osgi.framework.internal.core.FrameworkProperties; |
| import org.eclipse.osgi.service.debug.DebugOptions; |
| |
| /** |
| * The DebugOptions class used by the framework to get debug options from. |
| * @since 3.1 |
| */ |
| public class FrameworkDebugOptions implements DebugOptions { |
| private Properties options = null; |
| private static FrameworkDebugOptions singleton = null; |
| private static boolean debugEnabled = true; |
| private static final String OPTIONS = ".options"; //$NON-NLS-1$ |
| |
| /** |
| * Returns the singleton instance of <code>FrameworkDebugOptions</code>. If |
| * debug is not enabled then <code>null</code> is returned. |
| * @return the instance of <code>FrameworkDebugOptions</code> |
| */ |
| public static FrameworkDebugOptions getDefault() { |
| if (singleton == null && debugEnabled) { |
| FrameworkDebugOptions result = new FrameworkDebugOptions(); |
| debugEnabled = result.isDebugEnabled(); |
| if (debugEnabled) |
| singleton = result; |
| } |
| return singleton; |
| } |
| |
| private static URL buildURL(String spec, boolean trailingSlash) { |
| if (spec == null) |
| return null; |
| boolean isFile = spec.startsWith("file:"); //$NON-NLS-1$ |
| try { |
| if (isFile) |
| return adjustTrailingSlash(new File(spec.substring(5)).toURL(), trailingSlash); |
| return new URL(spec); |
| } catch (MalformedURLException e) { |
| // if we failed and it is a file spec, there is nothing more we can do |
| // otherwise, try to make the spec into a file URL. |
| if (isFile) |
| return null; |
| try { |
| return adjustTrailingSlash(new File(spec).toURL(), trailingSlash); |
| } catch (MalformedURLException e1) { |
| return null; |
| } |
| } |
| } |
| |
| private static URL adjustTrailingSlash(URL url, boolean trailingSlash) throws MalformedURLException { |
| String file = url.getFile(); |
| if (trailingSlash == (file.endsWith("/"))) //$NON-NLS-1$ |
| return url; |
| file = trailingSlash ? file + "/" : file.substring(0, file.length() - 1); //$NON-NLS-1$ |
| return new URL(url.getProtocol(), url.getHost(), file); |
| } |
| |
| private FrameworkDebugOptions() { |
| super(); |
| loadOptions(); |
| } |
| |
| /** |
| * @see DebugOptions#getBooleanOption(String, boolean) |
| */ |
| public boolean getBooleanOption(String option, boolean defaultValue) { |
| String optionValue = getOption(option); |
| return (optionValue != null && optionValue.equalsIgnoreCase("true")) || defaultValue; //$NON-NLS-1$ |
| } |
| |
| /** |
| * @see DebugOptions#getOption(String) |
| */ |
| public String getOption(String option) { |
| return options != null ? options.getProperty(option) : null; |
| } |
| |
| /** |
| * @see DebugOptions#getOption(String, String) |
| */ |
| public String getOption(String option, String defaultValue) { |
| return options != null ? options.getProperty(option, defaultValue) : defaultValue; |
| } |
| |
| /** |
| * @see DebugOptions#getIntegerOption(String, int) |
| */ |
| public int getIntegerOption(String option, int defaultValue) { |
| String value = getOption(option); |
| try { |
| return value == null ? defaultValue : Integer.parseInt(value); |
| } catch (NumberFormatException e) { |
| return defaultValue; |
| } |
| } |
| |
| /** |
| * @see DebugOptions#setOption(String, String) |
| */ |
| public void setOption(String option, String value) { |
| if (options != null) |
| options.put(option, value.trim()); |
| } |
| |
| private boolean isDebugEnabled() { |
| return options != null; |
| } |
| |
| private void loadOptions() { |
| // if no debug option was specified, don't even bother to try. |
| // Must ensure that the options slot is null as this is the signal to the |
| // platform that debugging is not enabled. |
| String debugOptionsFilename = FrameworkProperties.getProperty("osgi.debug"); //$NON-NLS-1$ |
| if (debugOptionsFilename == null) |
| return; |
| options = new Properties(); |
| URL optionsFile; |
| if (debugOptionsFilename.length() == 0) { |
| // default options location is user.dir (install location may be r/o so |
| // is not a good candidate for a trace options that need to be updatable by |
| // by the user) |
| String userDir = FrameworkProperties.getProperty("user.dir").replace(File.separatorChar, '/'); //$NON-NLS-1$ |
| if (!userDir.endsWith("/")) //$NON-NLS-1$ |
| userDir += "/"; //$NON-NLS-1$ |
| debugOptionsFilename = new File(userDir, OPTIONS).toString(); |
| } |
| optionsFile = buildURL(debugOptionsFilename, false); |
| if (optionsFile == null) { |
| System.out.println("Unable to construct URL for options file: " + debugOptionsFilename); //$NON-NLS-1$ |
| return; |
| } |
| System.out.print("Debug options:\n " + optionsFile.toExternalForm()); //$NON-NLS-1$ |
| try { |
| InputStream input = optionsFile.openStream(); |
| try { |
| options.load(input); |
| System.out.println(" loaded"); //$NON-NLS-1$ |
| } finally { |
| input.close(); |
| } |
| } catch (FileNotFoundException e) { |
| System.out.println(" not found"); //$NON-NLS-1$ |
| } catch (IOException e) { |
| System.out.println(" did not parse"); //$NON-NLS-1$ |
| e.printStackTrace(System.out); |
| } |
| // trim off all the blanks since properties files don't do that. |
| for (Iterator i = options.keySet().iterator(); i.hasNext();) { |
| Object key = i.next(); |
| options.put(key, ((String) options.get(key)).trim()); |
| } |
| if (options.size() == 0) |
| options = null; |
| } |
| } |