Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 340 insertions, 0 deletions

diff --git a/odk/source/com/sun/star/lib/loader/Loader.java b/odk/source/com/sun/star/lib/loader/Loader.java
new file mode 100644
index 000000000..bc1a3c3e7
--- /dev/null
+++ b/odk/source/com/sun/star/lib/loader/Loader.java
@@ -0,0 +1,340 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   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 .
+ */
+
+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.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.ArrayList;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/**
+ * 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();
+        ArrayList<URL> res = new ArrayList<URL>();
+        try {
+            Enumeration<URL> en = loader.getResources( "META-INF/MANIFEST.MF" );
+            while ( en.hasMoreElements() ) {
+                res.add( 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 = res.get( i );
+                try {
+                    JarURLConnection jarConnection =
+                        (JarURLConnection) jarurl.openConnection();
+                    Manifest mf = jarConnection.getManifest();
+                    Attributes attrs = (mf != null) ? mf.getAttributes(
+                        "com/sun/star/lib/loader/Loader.class") : null;
+                    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 );
+            @SuppressWarnings("unchecked")
+            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() {
+        if ( m_Loader == null ) {
+
+            // get the urls from which to load classes and resources
+            // from the class path
+            ArrayList<URL> vec = new ArrayList<URL>();
+            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 ) {
+                callUnoinfo(path, vec);
+            } else {
+                System.err.println( "com.sun.star.lib.loader.Loader::" +
+                    "getCustomLoader: no UNO installation found!" );
+            }
+
+            // copy urls to array
+            final URL[] urls = new URL[vec.size()];
+            vec.toArray( urls );
+
+            // instantiate class loader
+            m_Loader = AccessController.doPrivileged(
+                new PrivilegedAction<ClassLoader>() {
+                    public ClassLoader run() {
+                        return new CustomURLClassLoader(urls);
+                    }
+                });
+        }
+
+        return m_Loader;
+    }
+
+    private static void addUrls(ArrayList<URL> urls, String data, String delimiter) {
+        StringTokenizer tokens = new StringTokenizer( data, delimiter );
+        while ( tokens.hasMoreTokens() ) {
+            try {
+                urls.add( new File( tokens.nextToken() ).toURI().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, ArrayList<URL> 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];
+                    System.arraycopy(buf, 0, buf2, 0, n);
+                    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;
+        }
+
+        @Override
+        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 );
+        }
+
+        @Override
+        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 );
+        }
+
+        @Override
+        protected synchronized 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;
+        }
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */