/************************************************************** * * 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. * *************************************************************/ import java.util.Vector; // __________ Implementation __________ /** * It's not allowed to call synchronoues back inside an oneway interface call. * (see IOnewayLink too). So we start a thread (implemented by this class), which * gets all neccessary parameters from the original called object and * call it back later inside his run() method. So the execution of such oneway call * will be asynchronous. It works in a generic way and can be used or any type * of oneway request. Because the source and the target of this call-link knows, * which method was used and which parameters must be handled. * * @author Andreas Schlüns * @created 17.07.2002 08:18 */ class OnewayExecutor extends Thread { // _______________________________ /** * const * We define some request for some well known oneway interface * calls here too. So they mustn't be declared more then ones. * Of course it's not necessary to use it ... but why not :-) */ public static final int REQUEST_FRAMEACTION = 1 ; public static final int REQUEST_STATUSCHANGED = 2 ; public static final int REQUEST_ADDSTATUSLISTENER = 3 ; public static final int REQUEST_REMOVESTATUSLISTENER = 4 ; public static final int REQUEST_DISPATCH = 5 ; public static final boolean ENCODE_PARAMS = true ; public static final boolean DECODE_PARAMS = false ; // _______________________________ /** * @member m_rLink the object, which wish to be called back by this thread * @member m_nRequest describes the type of the original request (means the * called oneyway method) * @member m_lParams list of parameters of the original request */ private IOnewayLink m_rLink ; private int m_nRequest ; private Vector m_lParams ; // _______________________________ /** * ctor * It's initialize this thread with all neccessary parameters. * It gets the object, which wish to be called back and the type * and parameters of the original request. * * @param nRequest * The two user of this callback can define an unique number, * which identify the type of original interface method. * So the called interface object can decide, which action will be * neccessary. * * @param lParams * If the original method used parameters, they will be coded here in * a generic way. Only the called interface object know (it depends * from the original request - see nRequest too), how this list must * be interpreted. * Note: Atomic types (e.g. int, long) will be transported as objects * too (Integer, Long)! */ public OnewayExecutor( IOnewayLink rLink , int nRequest , Vector lParams ) { m_rLink = rLink ; m_nRequest = nRequest; m_lParams = lParams ; if (m_rLink==null) System.out.println("ctor ... m_rLink == null"); if (m_lParams==null) System.out.println("ctor ... m_lParams == null"); } // _______________________________ /** * implements the thread function * Here we call the internal set link object back and * give him all neccessary parameters. * After that we die by ouerself ... */ public void run() { if (m_rLink==null) System.out.println("run ... m_rLink == null"); if (m_lParams==null) System.out.println("run ... m_lParams == null"); if (m_rLink!=null) m_rLink.execOneway( m_nRequest, m_lParams ); } // _______________________________ /** * static helper! * To make convertion of the generic parameter list to the original * one easier - you can use this helper methods. They know how suchlist * must be coded. It's not a must to use it - but you can ... */ public static void codeFrameAction( boolean bEncode, Vector[] lParams, com.sun.star.frame.FrameActionEvent[] aAction) { if (bEncode) { lParams[0] = new Vector(1); lParams[0].add( (Object)(aAction[0]) ); } else { aAction[0] = (com.sun.star.frame.FrameActionEvent) (lParams[0].elementAt(0)); } } // _______________________________ public static void codeStatusChanged( boolean bEncode, Vector[] lParams, com.sun.star.frame.FeatureStateEvent[] aStatus) { if (bEncode) { lParams[0] = new Vector(1); lParams[0].add( (Object)aStatus[0] ); } else { aStatus[0] = (com.sun.star.frame.FeatureStateEvent) (lParams[0].elementAt(0)); } } // _______________________________ public static void codeAddOrRemoveStatusListener( boolean bEncode, Vector[] lParams, com.sun.star.frame.XStatusListener[] xListener, com.sun.star.util.URL[] aURL) { if (bEncode) { lParams[0] = new Vector(2); lParams[0].add( (Object)xListener[0] ); lParams[0].add( (Object)aURL[0] ); } else { xListener[0] = (com.sun.star.frame.XStatusListener) (lParams[0].elementAt(0)); aURL[0] = (com.sun.star.util.URL)(lParams[0].elementAt(1)); } } // _______________________________ public static void codeDispatch( boolean bEncode, Vector[] lParams, com.sun.star.util.URL[] aURL, com.sun.star.beans.PropertyValue[][] lArgs) { if (bEncode) { int nLength = lArgs.length+1; int nPos = 0; lParams[0] = new Vector(nLength); lParams[0].add( (Object)aURL[0] ); --nLength; while (nLength>0) { lParams[0].add( (Object)lArgs[0][nPos] ); --nLength; ++nPos ; } } else { int nLength = lParams[0].size()-1; int nPos = 0; lArgs[0] = new com.sun.star.beans.PropertyValue[nLength]; aURL[0] = (com.sun.star.util.URL)(lParams[0].elementAt(0)); while (nPos