| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| package com.sun.star.lib.loader; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.UnsupportedEncodingException; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.net.JarURLConnection; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.util.Enumeration; |
| import java.util.jar.Attributes; |
| import java.util.jar.Manifest; |
| import java.util.StringTokenizer; |
| import java.util.Vector; |
| |
| /** |
| * This class can be used as a loader for application classes which use UNO. |
| * |
| * <p>The Loader class detects a UNO installation on the system and adds the |
| * UNO jar files to the search path of a customized class loader, which is used |
| * for loading the application classes.</p> |
| */ |
| public final class Loader { |
| |
| private static ClassLoader m_Loader = null; |
| |
| /** |
| * do not instantiate |
| */ |
| private Loader() {} |
| |
| /** |
| * The main method instantiates a customized class loader with the |
| * UNO jar files added to the search path and loads the application class, |
| * which is specified in the Main-Class attribute of the |
| * com/sun/star/lib/Loader.class entry of the manifest file or |
| * as first parameter in the argument list. |
| */ |
| public static void main( String[] arguments ) throws Exception { |
| |
| // get the name of the class to be loaded from the manifest |
| String className = null; |
| Class clazz = Loader.class; |
| ClassLoader loader = clazz.getClassLoader(); |
| Vector res = new Vector(); |
| try { |
| Enumeration en = loader.getResources( "META-INF/MANIFEST.MF" ); |
| while ( en.hasMoreElements() ) { |
| res.add( (URL) en.nextElement() ); |
| } |
| // the jarfile with the com/sun/star/lib/loader/Loader.class |
| // per-entry attribute is most probably the last resource in the |
| // list, therefore search backwards |
| for ( int i = res.size() - 1; i >= 0; i-- ) { |
| URL jarurl = (URL) res.elementAt( i ); |
| try { |
| JarURLConnection jarConnection = |
| (JarURLConnection) jarurl.openConnection(); |
| Manifest mf = jarConnection.getManifest(); |
| Attributes attrs = (Attributes) mf.getAttributes( |
| "com/sun/star/lib/loader/Loader.class" ); |
| if ( attrs != null ) { |
| className = attrs.getValue( "Application-Class" ); |
| if ( className != null ) |
| break; |
| } |
| } catch ( IOException e ) { |
| // if an I/O error occurs when opening a new |
| // JarURLConnection, ignore this manifest file |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "main: bad manifest file: " + e ); |
| } |
| } |
| } catch ( IOException e ) { |
| // if an I/O error occurs when getting the manifest resources, |
| // try to get the name of the class to be loaded from the argument |
| // list |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "main: cannot get manifest resources: " + e ); |
| } |
| |
| // if no manifest entry was found, get the name of the class |
| // to be loaded from the argument list |
| String[] args; |
| if ( className == null ) { |
| if ( arguments.length > 0 ) { |
| className = arguments[0]; |
| args = new String[arguments.length - 1]; |
| System.arraycopy( arguments, 1, args, 0, args.length ); |
| } else { |
| throw new IllegalArgumentException( |
| "The name of the class to be loaded must be either " + |
| "specified in the Main-Class attribute of the " + |
| "com/sun/star/lib/loader/Loader.class entry " + |
| "of the manifest file or as a command line argument." ); |
| } |
| } else { |
| args = arguments; |
| } |
| |
| // load the class with the customized class loader and |
| // invoke the main method |
| if ( className != null ) { |
| ClassLoader cl = getCustomLoader(); |
| Thread.currentThread().setContextClassLoader(cl); |
| Class c = cl.loadClass( className ); |
| Method m = c.getMethod( "main", new Class[] { String[].class } ); |
| m.invoke( null, new Object[] { args } ); |
| } |
| } |
| |
| /** |
| * Gets the customized class loader with the UNO jar files added to the |
| * search path. |
| * |
| * @return the customized class loader |
| */ |
| public static synchronized ClassLoader getCustomLoader() { |
| |
| final String CLASSESDIR = "classes"; |
| final String JUHJAR = "juh.jar"; |
| |
| if ( m_Loader == null ) { |
| |
| // get the urls from which to load classes and resources |
| // from the class path |
| Vector vec = new Vector(); |
| String classpath = null; |
| try { |
| classpath = System.getProperty( "java.class.path" ); |
| } catch ( SecurityException e ) { |
| // don't add the class path entries to the list of class |
| // loader URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: cannot get system property " + |
| "java.class.path: " + e ); |
| } |
| if ( classpath != null ) { |
| addUrls(vec, classpath, File.pathSeparator); |
| } |
| |
| // get the urls from which to load classes and resources |
| // from the UNO installation |
| String path = InstallationFinder.getPath(); |
| if ( path != null ) { |
| File fClassesDir = new File( path, CLASSESDIR ); |
| File fJuh = new File( fClassesDir, JUHJAR ); |
| if ( fJuh.exists() ) { |
| URL[] clurls = new URL[1]; |
| try { |
| clurls[0] = fJuh.toURL(); |
| ClassLoader cl = new CustomURLClassLoader( clurls ); |
| Class c = cl.loadClass( |
| "com.sun.star.comp.helper.UnoInfo" ); |
| Method m = c.getMethod( "getJars", (Class[]) null ); |
| URL[] jarurls = (URL[]) m.invoke( |
| null, (Object[]) null ); |
| for ( int i = 0; i < jarurls.length; i++ ) { |
| vec.add( jarurls[i] ); |
| } |
| } catch ( MalformedURLException e ) { |
| // don't add the UNO jar files to the list of class |
| // loader URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: cannot add UNO jar files: " + e ); |
| } catch ( ClassNotFoundException e ) { |
| // don't add the UNO jar files to the list of class |
| // loader URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: cannot add UNO jar files: " + e ); |
| } catch ( NoSuchMethodException e ) { |
| // don't add the UNO jar files to the list of class |
| // loader URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: cannot add UNO jar files: " + e ); |
| } catch ( IllegalAccessException e ) { |
| // don't add the UNO jar files to the list of class |
| // loader URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: cannot add UNO jar files: " + e ); |
| } catch ( InvocationTargetException e ) { |
| // don't add the UNO jar files to the list of class |
| // loader URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: cannot add UNO jar files: " + e ); |
| } |
| } else { |
| callUnoinfo(path, vec); |
| } |
| } else { |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: no UNO installation found!" ); |
| } |
| |
| // copy urls to array |
| URL[] urls = new URL[vec.size()]; |
| vec.toArray( urls ); |
| |
| // instantiate class loader |
| m_Loader = new CustomURLClassLoader( urls ); |
| } |
| |
| return m_Loader; |
| } |
| |
| private static void addUrls(Vector urls, String data, String delimiter) { |
| StringTokenizer tokens = new StringTokenizer( data, delimiter ); |
| while ( tokens.hasMoreTokens() ) { |
| try { |
| urls.add( new File( tokens.nextToken() ).toURL() ); |
| } catch ( MalformedURLException e ) { |
| // don't add this class path entry to the list of class loader |
| // URLs |
| System.err.println( "com.sun.star.lib.loader.Loader::" + |
| "getCustomLoader: bad pathname: " + e ); |
| } |
| } |
| } |
| |
| private static void callUnoinfo(String path, Vector urls) { |
| Process p; |
| try { |
| p = Runtime.getRuntime().exec( |
| new String[] { new File(path, "unoinfo").getPath(), "java" }); |
| } catch (IOException e) { |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader: exec" + |
| " unoinfo: " + e); |
| return; |
| } |
| new Drain(p.getErrorStream()).start(); |
| int code; |
| byte[] buf = new byte[1000]; |
| int n = 0; |
| try { |
| InputStream s = p.getInputStream(); |
| code = s.read(); |
| for (;;) { |
| if (n == buf.length) { |
| if (n > Integer.MAX_VALUE / 2) { |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader:" + |
| " too much unoinfo output"); |
| return; |
| } |
| byte[] buf2 = new byte[2 * n]; |
| for (int i = 0; i < n; ++i) { |
| buf2[i] = buf[i]; |
| } |
| buf = buf2; |
| } |
| int k = s.read(buf, n, buf.length - n); |
| if (k == -1) { |
| break; |
| } |
| n += k; |
| } |
| } catch (IOException e) { |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader: reading" + |
| " unoinfo output: " + e); |
| return; |
| } |
| int ev; |
| try { |
| ev = p.waitFor(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader: waiting for" + |
| " unoinfo: " + e); |
| return; |
| } |
| if (ev != 0) { |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader: unoinfo" |
| + " exit value " + n); |
| return; |
| } |
| String s; |
| if (code == '0') { |
| s = new String(buf); |
| } else if (code == '1') { |
| try { |
| s = new String(buf, "UTF-16LE"); |
| } catch (UnsupportedEncodingException e) { |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader:" + |
| " transforming unoinfo output: " + e); |
| return; |
| } |
| } else { |
| System.err.println( |
| "com.sun.star.lib.loader.Loader::getCustomLoader: bad unoinfo" |
| + " output"); |
| return; |
| } |
| addUrls(urls, s, "\0"); |
| } |
| |
| private static final class Drain extends Thread { |
| public Drain(InputStream stream) { |
| super("unoinfo stderr drain"); |
| this.stream = stream; |
| } |
| |
| public void run() { |
| try { |
| while (stream.read() != -1) {} |
| } catch (IOException e) { /* ignored */ } |
| } |
| |
| private final InputStream stream; |
| } |
| |
| /** |
| * A customized class loader which is used to load classes and resources |
| * from a search path of user-defined URLs. |
| */ |
| private static final class CustomURLClassLoader extends URLClassLoader { |
| |
| public CustomURLClassLoader( URL[] urls ) { |
| super( urls ); |
| } |
| |
| protected Class findClass( String name ) throws ClassNotFoundException { |
| // This is only called via this.loadClass -> super.loadClass -> |
| // this.findClass, after this.loadClass has already called |
| // super.findClass, so no need to call super.findClass again: |
| throw new ClassNotFoundException( name ); |
| } |
| |
| protected Class loadClass( String name, boolean resolve ) |
| throws ClassNotFoundException |
| { |
| Class c = findLoadedClass( name ); |
| if ( c == null ) { |
| try { |
| c = super.findClass( name ); |
| } catch ( ClassNotFoundException e ) { |
| return super.loadClass( name, resolve ); |
| } catch ( SecurityException e ) { |
| // A SecurityException "Prohibited package name: java.lang" |
| // may occur when the user added the JVM's rt.jar to the |
| // java.class.path: |
| return super.loadClass( name, resolve ); |
| } |
| } |
| if ( resolve ) { |
| resolveClass( c ); |
| } |
| return c; |
| } |
| } |
| } |
