Try to fix LibreOffice class loader

CHANGELOG.md

@@ -18,6 +18,8 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 ### Fixed
 
 - Inherit fields from cross-referenced entries as specified by biblatex [#5045](https://github.com/JabRef/jabref/issues/5045)
+- We fixed an issue where it was no longer possible to connect to LibreOffice [#5261](https://github.com/JabRef/jabref/issues/5261)
+
 
 ### Removed
 

src/main/java/org/jabref/gui/openoffice/Bootstrap.java

@@ -0,0 +1,382 @@
+// -*- 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 org.jabref.gui.openoffice;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.PrintStream;
+import java.io.UnsupportedEncodingException;
+import java.net.URLClassLoader;
+import java.util.HashMap;
+import java.util.Hashtable;
+import java.util.Map;
+import java.util.Random;
+
+import com.sun.star.bridge.UnoUrlResolver;
+import com.sun.star.bridge.XUnoUrlResolver;
+import com.sun.star.comp.helper.BootstrapException;
+import com.sun.star.comp.helper.ComponentContext;
+import com.sun.star.comp.helper.ComponentContextEntry;
+import com.sun.star.comp.loader.JavaLoader;
+import com.sun.star.comp.servicemanager.ServiceManager;
+import com.sun.star.container.XSet;
+import com.sun.star.lang.XInitialization;
+import com.sun.star.lang.XMultiComponentFactory;
+import com.sun.star.lang.XMultiServiceFactory;
+import com.sun.star.lib.util.NativeLibraryLoader;
+import com.sun.star.loader.XImplementationLoader;
+import com.sun.star.uno.UnoRuntime;
+import com.sun.star.uno.XComponentContext;
+
+/** Bootstrap offers functionality to obtain a context or simply
+    a service manager.
+    The service manager can create a few basic services, whose implementations  are:
+    <ul>
+    <li>com.sun.star.comp.loader.JavaLoader</li>
+    <li>com.sun.star.comp.urlresolver.UrlResolver</li>
+    <li>com.sun.star.comp.bridgefactory.BridgeFactory</li>
+    <li>com.sun.star.comp.connections.Connector</li>
+    <li>com.sun.star.comp.connections.Acceptor</li>
+    <li>com.sun.star.comp.servicemanager.ServiceManager</li>
+    </ul>
+
+    Other services can be inserted into the service manager by
+    using its XSet interface:
+    <pre>
+        XSet xSet = UnoRuntime.queryInterface( XSet.class, aMultiComponentFactory );
+        // insert the service manager
+        xSet.insert( aSingleComponentFactory );
+    </pre>
+*/
+public class Bootstrap {
+
+    private static final Random RANDOM_PIPE_NAME = new Random();
+    private static boolean M_LOADED_JUH = false;
+
+    private static void insertBasicFactories(XSet xSet, XImplementationLoader xImpLoader) throws Exception {
+        // insert the factory of the loader
+        xSet.insert(xImpLoader.activate("com.sun.star.comp.loader.JavaLoader", null, null, null));
+
+        // insert the factory of the URLResolver
+        xSet.insert(xImpLoader.activate("com.sun.star.comp.urlresolver.UrlResolver", null, null, null));
+
+        // insert the bridgefactory
+        xSet.insert(xImpLoader.activate("com.sun.star.comp.bridgefactory.BridgeFactory", null, null, null));
+
+        // insert the connector
+        xSet.insert(xImpLoader.activate("com.sun.star.comp.connections.Connector", null, null, null));
+
+        // insert the acceptor
+        xSet.insert(xImpLoader.activate("com.sun.star.comp.connections.Acceptor", null, null, null));
+    }
+
+    /**
+     * Returns an array of default commandline options to start bootstrapped
+     * instance of soffice with. You may use it in connection with bootstrap
+     * method for example like this:
+     * <pre>
+     *     List list = Arrays.asList( Bootstrap.getDefaultOptions() );
+     *     list.remove("--nologo");
+     *     list.remove("--nodefault");
+     *     list.add("--invisible");
+     *
+     *     Bootstrap.bootstrap( list.toArray( new String[list.size()] );
+     * </pre>
+     *
+     * @return an array of default commandline options
+     * @see #bootstrap( String[] )
+     * @since LibreOffice 5.1
+     */
+    public static final String[] getDefaultOptions() {
+        return new String[] {"--nologo", "--nodefault", "--norestore", "--nolockcheck"};
+    }
+
+    /**
+       backwards compatibility stub.
+        @param context_entries the hash table contains mappings of entry names (type string) to
+        context entries (type class ComponentContextEntry).
+        @throws Exception if things go awry.
+        @return a new context.
+     */
+    public static XComponentContext createInitialComponentContext(Hashtable<String, Object> context_entries) throws Exception {
+        return createInitialComponentContext((Map<String, Object>) context_entries);
+    }
+
+    /** Bootstraps an initial component context with service manager and basic
+        jurt components inserted.
+        @param context_entries the hash table contains mappings of entry names (type string) to
+        context entries (type class ComponentContextEntry).
+        @throws Exception if things go awry.
+        @return a new context.
+    */
+    public static XComponentContext createInitialComponentContext(Map<String, Object> context_entries) throws Exception {
+        ServiceManager xSMgr = new ServiceManager();
+
+        XImplementationLoader xImpLoader = UnoRuntime.queryInterface(XImplementationLoader.class, new JavaLoader());
+        XInitialization xInit = UnoRuntime.queryInterface(XInitialization.class, xImpLoader);
+        Object[] args = new Object[] {xSMgr};
+        xInit.initialize(args);
+
+        // initial component context
+        if (context_entries == null) {
+            context_entries = new HashMap<>(1);
+        }
+        // add smgr
+        context_entries.put("/singletons/com.sun.star.lang.theServiceManager", new ComponentContextEntry(null, xSMgr));
+        // ... xxx todo: add standard entries
+        XComponentContext xContext = new ComponentContext(context_entries, null);
+
+        xSMgr.setDefaultContext(xContext);
+
+        XSet xSet = UnoRuntime.queryInterface(XSet.class, xSMgr);
+        // insert basic jurt factories
+        insertBasicFactories(xSet, xImpLoader);
+
+        return xContext;
+    }
+
+    /**
+     * Bootstraps a servicemanager with the jurt base components registered.
+     *
+     * See also UNOIDL <code>com.sun.star.lang.ServiceManager</code>.
+     *
+     * @throws Exception if things go awry.
+     * @return     a freshly bootstrapped service manager
+     */
+    public static XMultiServiceFactory createSimpleServiceManager() throws Exception {
+        return UnoRuntime.queryInterface(XMultiServiceFactory.class, createInitialComponentContext((Map<String, Object>) null).getServiceManager());
+    }
+
+    /** Bootstraps the initial component context from a native UNO installation.
+
+        @throws Exception if things go awry.
+        @return a freshly bootstrapped component context.
+
+        See also
+        <code>cppuhelper/defaultBootstrap_InitialComponentContext()</code>.
+    */
+    public static final XComponentContext defaultBootstrap_InitialComponentContext() throws Exception {
+        return defaultBootstrap_InitialComponentContext((String) null, (Map<String, String>) null);
+    }
+
+    /**
+     * Backwards compatibility stub.
+     *
+     * @param ini_file
+     *        ini_file (may be null: uno.rc besides cppuhelper lib)
+     * @param bootstrap_parameters
+     *        bootstrap parameters (maybe null)
+     *
+     * @throws Exception if things go awry.
+     * @return a freshly bootstrapped component context.
+     */
+    public static final XComponentContext defaultBootstrap_InitialComponentContext(String ini_file, Hashtable<String, String> bootstrap_parameters) throws Exception {
+        return defaultBootstrap_InitialComponentContext(ini_file, (Map<String, String>) bootstrap_parameters);
+    }
+
+    /** Bootstraps the initial component context from a native UNO installation.
+
+        See also
+        <code>cppuhelper/defaultBootstrap_InitialComponentContext()</code>.
+
+        @param ini_file
+               ini_file (may be null: uno.rc besides cppuhelper lib)
+        @param bootstrap_parameters
+               bootstrap parameters (maybe null)
+
+        @throws Exception if things go awry.
+        @return a freshly bootstrapped component context.
+    */
+    public static final XComponentContext defaultBootstrap_InitialComponentContext(String ini_file, Map<String, String> bootstrap_parameters) throws Exception {
+        // jni convenience: easier to iterate over array than calling Hashtable
+        String pairs[] = null;
+        if (null != bootstrap_parameters) {
+            pairs = new String[2 * bootstrap_parameters.size()];
+            int n = 0;
+            for (Map.Entry<String, String> bootstrap_parameter : bootstrap_parameters.entrySet()) {
+                pairs[n++] = bootstrap_parameter.getKey();
+                pairs[n++] = bootstrap_parameter.getValue();
+            }
+        }
+
+        if (!M_LOADED_JUH) {
+            if ("The Android Project".equals(System.getProperty("java.vendor"))) {
+                // Find out if we are configured with DISABLE_DYNLOADING or
+                // not. Try to load the lo-bootstrap shared library which
+                // won't exist in the DISABLE_DYNLOADING case. (And which will
+                // be already loaded otherwise, so nothing unexpected happens
+                // that case.) Yeah, this would be simpler if I just could be
+                // bothered to keep a separate branch for DISABLE_DYNLOADING
+                // on Android, merging in master periodically, until I know
+                // for sure whether it is what I want, or not.
+
+                boolean disable_dynloading = false;
+                try {
+                    System.loadLibrary("lo-bootstrap");
+                } catch (UnsatisfiedLinkError e) {
+                    disable_dynloading = true;
+                }
+
+                if (!disable_dynloading) {
+                    NativeLibraryLoader.loadLibrary(Bootstrap.class.getClassLoader(), "juh");
+                }
+            } else {
+                NativeLibraryLoader.loadLibrary(Bootstrap.class.getClassLoader(), "juh");
+            }
+            M_LOADED_JUH = true;
+        }
+        return UnoRuntime.queryInterface(XComponentContext.class, cppuhelper_bootstrap(ini_file, pairs, Bootstrap.class.getClassLoader()));
+    }
+
+    private static native Object cppuhelper_bootstrap(String ini_file, String bootstrap_parameters[], ClassLoader loader) throws Exception;
+
+    /**
+     * Bootstraps the component context from a UNO installation.
+     *
+     * @throws BootstrapException if things go awry.
+     *
+     * @return a bootstrapped component context.
+     *
+     * @since UDK 3.1.0
+     */
+    public static final XComponentContext bootstrap(URLClassLoader loader) throws BootstrapException {
+
+        String[] defaultArgArray = getDefaultOptions();
+        return bootstrap(defaultArgArray, loader);
+    }
+
+    /**
+     * Bootstraps the component context from a UNO installation.
+     *
+     * @param argArray
+     *        an array of strings - commandline options to start instance of
+     *        soffice with
+     * @see #getDefaultOptions()
+     *
+     * @throws BootstrapException if things go awry.
+     *
+     * @return a bootstrapped component context.
+     *
+     * @since LibreOffice 5.1
+     */
+    public static final XComponentContext bootstrap(String[] argArray, URLClassLoader loader) throws BootstrapException {
+
+        XComponentContext xContext = null;
+
+        try {
+            // create default local component context
+            XComponentContext xLocalContext = createInitialComponentContext((Map<String, Object>) null);
+            if (xLocalContext == null) {
+                throw new BootstrapException("no local component context!");
+            }
+
+            // find office executable relative to this class's class loader
+            String sOffice = System.getProperty("os.name").startsWith("Windows") ? "soffice.exe" : "soffice";
+
+            File fOffice = NativeLibraryLoader.getResource(loader, sOffice);
+            if (fOffice == null) {
+                throw new BootstrapException("no office executable found!");
+            }
+
+            // create call with arguments
+            //We need a socket, pipe does not work. https://api.libreoffice.org/examples/examples.html
+            String[] cmdArray = new String[argArray.length + 2];
+            cmdArray[0] = fOffice.getPath();
+            cmdArray[1] = ("--accept=socket,host=localhost,port=2083" + ";urp;");
+
+            System.arraycopy(argArray, 0, cmdArray, 2, argArray.length);
+
+            // start office process
+            Process p = Runtime.getRuntime().exec(cmdArray);
+            pipe(p.getInputStream(), System.out, "CO> ");
+            pipe(p.getErrorStream(), System.err, "CE> ");
+
+            // initial service manager
+            XMultiComponentFactory xLocalServiceManager = xLocalContext.getServiceManager();
+            if (xLocalServiceManager == null) {
+                throw new BootstrapException("no initial service manager!");
+            }
+
+            // create a URL resolver
+            XUnoUrlResolver xUrlResolver = UnoUrlResolver.create(xLocalContext);
+
+            // connection string
+            String sConnect = "uno:socket,host=localhost,port=2083" + ";urp;StarOffice.ComponentContext";
+
+            // wait until office is started
+            for (int i = 0;; ++i) {
+                try {
+                    // try to connect to office
+                    Object context = xUrlResolver.resolve(sConnect);
+                    xContext = UnoRuntime.queryInterface(XComponentContext.class, context);
+                    if (xContext == null) {
+                        throw new BootstrapException("no component context!");
+                    }
+                    break;
+                } catch (com.sun.star.connection.NoConnectException ex) {
+                    // Wait 500 ms, then try to connect again, but do not wait
+                    // longer than 5 min (= 600 * 500 ms) total:
+                    if (i == 600) {
+                        throw new BootstrapException(ex);
+                    }
+                    Thread.sleep(500);
+                }
+            }
+        } catch (BootstrapException e) {
+            throw e;
+        } catch (java.lang.RuntimeException e) {
+            throw e;
+        } catch (java.lang.Exception e) {
+            throw new BootstrapException(e);
+        }
+
+        return xContext;
+    }
+
+    private static void pipe(final InputStream in, final PrintStream out, final String prefix) {
+
+        new Thread("Pipe: " + prefix) {
+
+            @Override
+            public void run() {
+                try {
+                    BufferedReader r = new BufferedReader(new InputStreamReader(in, "UTF-8"));
+
+                    for (;;) {
+                        String s = r.readLine();
+                        if (s == null) {
+                            break;
+                        }
+                        out.println(prefix + s);
+                    }
+                } catch (UnsupportedEncodingException e) {
+                    e.printStackTrace(System.err);
+                } catch (java.io.IOException e) {
+                    e.printStackTrace(System.err);
+                }
+            }
+        }.start();
+    }
+}
+
+// vim:set shiftwidth=4 softtabstop=4 expandtab: