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 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
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 ************************************************************************/

package com.sun.star.comp.helper;

import com.sun.star.bridge.UnoUrlResolver;
import com.sun.star.bridge.XUnoUrlResolver;
import com.sun.star.comp.loader.JavaLoader;
import com.sun.star.container.XSet;
import com.sun.star.lang.XInitialization;
import com.sun.star.lang.XMultiServiceFactory;
import com.sun.star.lang.XMultiComponentFactory;
import com.sun.star.lang.XSingleComponentFactory;
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;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Random;

/** 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 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 ) );
    }

    /** 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).
        @return a new context.
    */
    static public XComponentContext createInitialComponentContext( Hashtable context_entries )
        throws Exception
    {
        XImplementationLoader xImpLoader = UnoRuntime.queryInterface(
            XImplementationLoader.class, new JavaLoader() );

        // Get the factory of the ServiceManager
        XSingleComponentFactory smgr_fac = UnoRuntime.queryInterface(
            XSingleComponentFactory.class, xImpLoader.activate(
                "com.sun.star.comp.servicemanager.ServiceManager", null, null, null ) );

        // Create an instance of the ServiceManager
        XMultiComponentFactory xSMgr = UnoRuntime.queryInterface(
            XMultiComponentFactory.class, smgr_fac.createInstanceWithContext( null ) );

        // post init loader
        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 Hashtable( 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 );

        // post init smgr
        xInit = UnoRuntime.queryInterface(
            XInitialization.class, xSMgr );
        args = new Object [] { null, xContext }; // no registry, default context
        xInit.initialize( args );

        XSet xSet = UnoRuntime.queryInterface( XSet.class, xSMgr );
        // insert the service manager
        xSet.insert( smgr_fac );
        // and basic jurt factories
        insertBasicFactories( xSet, xImpLoader );

        return xContext;
    }

    /**
     * Bootstraps a servicemanager with the jurt base components registered.
     * <p>
     * @return     a freshly boostrapped service manager
     * @see        com.sun.star.lang.ServiceManager
     */
    static public XMultiServiceFactory createSimpleServiceManager() throws Exception
    {
        return UnoRuntime.queryInterface(
            XMultiServiceFactory.class, createInitialComponentContext( null ).getServiceManager() );
    }


    /** Bootstraps the initial component context from a native UNO installation.

        @see cppuhelper/defaultBootstrap_InitialComponentContext()
    */
    static public final XComponentContext defaultBootstrap_InitialComponentContext()
        throws Exception
    {
        return defaultBootstrap_InitialComponentContext( null, null );
    }
    /** Bootstraps the initial component context from a native UNO installation.

        @param ini_file
               ini_file (may be null: uno.rc besides cppuhelper lib)
        @param bootstrap_parameters
               bootstrap parameters (maybe null)

        @see cppuhelper/defaultBootstrap_InitialComponentContext()
    */
    static public final XComponentContext defaultBootstrap_InitialComponentContext(
        String ini_file, Hashtable 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() ];
            Enumeration keys = bootstrap_parameters.keys();
            int n = 0;
            while (keys.hasMoreElements())
            {
                String name = (String)keys.nextElement();
                pairs[ n++ ] = name;
                pairs[ n++ ] = (String)bootstrap_parameters.get( name );
            }
        }

        if (! m_loaded_juh)
        {
            NativeLibraryLoader.loadLibrary( Bootstrap.class.getClassLoader(), "juh" );
            m_loaded_juh = true;
        }
        return UnoRuntime.queryInterface(
            XComponentContext.class,
            cppuhelper_bootstrap(
                ini_file, pairs, Bootstrap.class.getClassLoader() ) );
    }

    static private boolean m_loaded_juh = false;
    static private native Object cppuhelper_bootstrap(
        String ini_file, String bootstrap_parameters [], ClassLoader loader )
        throws Exception;

    /**
     * Bootstraps the component context from a UNO installation.
     *
     * @return a bootstrapped component context.
     *
     * @since UDK 3.1.0
     */
    public static final XComponentContext bootstrap()
        throws BootstrapException {

        XComponentContext xContext = null;

        try {
            // create default local component context
            XComponentContext xLocalContext =
                createInitialComponentContext( 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(
                Bootstrap.class.getClassLoader(), sOffice );
            if ( fOffice == null )
                throw new BootstrapException( "no office executable found!" );

            // create random pipe name
            String sPipeName = "uno" +
                Long.toString( (new Random()).nextLong() & 0x7fffffffffffffffL );

            // create call with arguments
            String[] cmdArray = new String[7];
            cmdArray[0] = fOffice.getPath();
            cmdArray[1] = "-nologo";
            cmdArray[2] = "-nodefault";
            cmdArray[3] = "-norestore";
            cmdArray[4] = "-nocrashreport";
            cmdArray[5] = "-nolockcheck";
            cmdArray[6] = "-accept=pipe,name=" + sPipeName + ";urp;";

            // 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:pipe,name=" + sPipeName +
                ";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.toString());
                    }
                    Thread.currentThread().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) {
            public void run() {
                BufferedReader r = new BufferedReader(
                    new InputStreamReader( in ) );
                try {
                    for ( ; ; ) {
                        String s = r.readLine();
                        if ( s == null ) {
                            break;
                        }
                        out.println( prefix + s );
                    }
                } catch ( java.io.IOException e ) {
                    e.printStackTrace( System.err );
                }
            }
        }.start();
    }
}
