jurt/com/sun/star/comp/connections/ConstantInstanceProvider.java

   1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 package com.sun.star.comp.connections;
  21
  22 import com.sun.star.bridge.XInstanceProvider;
  23
  24 import com.sun.star.lang.XMultiServiceFactory;
  25 import com.sun.star.lang.XSingleServiceFactory;
  26
  27 import com.sun.star.registry.XRegistryKey;
  28
  29 import com.sun.star.comp.loader.FactoryHelper;
  30
  31
  32 /**
  33  * The <code>ConstantInstanceProvider</code> is a component
  34  * that implements the <code>XInstanceProvider</code> Interface.
  35  *
  36  * @see         com.sun.star.bridge.XBridge
  37  * @see         com.sun.star.bridge.XBridgeFactory
  38  * @see         com.sun.star.bridge.XInstanceProvider
  39  * @see         com.sun.star.comp.loader.JavaLoader
  40  * @since       UDK1.0
  41  */
  42 public class ConstantInstanceProvider implements XInstanceProvider {
  43     /**
  44      * When set to true, enables various debugging output.
  45      */
  46     public static final boolean DEBUG = false;
  47
  48     /**
  49      * The name of the service, the <code>JavaLoader</code> accesses this through
  50      * reflection.
  51      */
  52     private static final String __serviceName = "com.sun.star.comp.connection.InstanceProvider";
  53
  54     /**
  55      * Gives a factory for creating the service.
  56      * <p>This method is called by the <code>JavaLoader</code>.</p>
  57      *
  58      * @param   implName     the name of the implementation for which a service is desired.
  59      * @param   multiFactory the service manager to be uses if needed.
  60      * @param   regKey       the registryKey.
  61      * @return  returns a <code>XSingleServiceFactory</code> for creating the component.
  62      *
  63      * @see                  com.sun.star.comp.loader.JavaLoader
  64      */
  65     public static XSingleServiceFactory __getServiceFactory(String implName,
  66                                                             XMultiServiceFactory multiFactory,
  67                                                             XRegistryKey regKey)
  68     {
  69         XSingleServiceFactory xSingleServiceFactory = null;
  70
  71         if (implName.equals(ConstantInstanceProvider.class.getName()) )
  72             xSingleServiceFactory = FactoryHelper.getServiceFactory(ConstantInstanceProvider.class,
  73                                                                     __serviceName,
  74                                                                     multiFactory,
  75                                                                     regKey);
  76
  77         return xSingleServiceFactory;
  78     }
  79
  80     protected XMultiServiceFactory _serviceManager;
  81     protected String _serviceName;
  82     protected Object _instance;
  83
  84
  85     public void setInstance(String serviceName) throws com.sun.star.uno.Exception {
  86         _instance = _serviceManager.createInstance(serviceName);
  87         _serviceName = serviceName;
  88     }
  89
  90     /**
  91      * Constructs a new <code>ConstantInstanceProvider</code>.
  92      * <p>Uses the provided ServiceManager as the provided instance.</p>
  93      *
  94      * @param    serviceManager   the provided service manager
  95      */
  96     public ConstantInstanceProvider(XMultiServiceFactory serviceManager) {
  97         _serviceManager = serviceManager;
  98
  99         _serviceName = "SERVICEMANAGER";
 100         _instance    = serviceManager;
 101     }
 102
 103     /**
 104      * Gives an object for the passed instance name.
 105      *
 106      * @return  the desired instance
 107      * @param   sInstanceName   the name of the desired instance
 108      */
 109     public Object getInstance(String sInstanceName) throws com.sun.star.container.NoSuchElementException, com.sun.star.uno.RuntimeException {
 110         Object result = sInstanceName.equals(_serviceName) ? _instance : null;
 111
 112         if(DEBUG) System.err.println("##### " + getClass().getName() + ".getInstance(" + sInstanceName + "):" + result);
 113
 114         return result;
 115     }
 116 }
 117
 118 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */