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/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the BSD license.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*************************************************************************/
import java.util.ArrayList;
// __________ Implementation __________
/**
* It's not allowed to call synchronous back inside an oneway interface call.
* (see IOnewayLink too). So we start a thread (implemented by this class), which
* gets all necessary 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.
*
*/
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 ArrayList<Object> m_lParams ;
/**
* ctor
* It's initialize this thread with all necessary 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
* necessary.
*
* @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 ,
ArrayList<Object> 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 necessary parameters.
* After that we die by ourselves ...
*/
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 conversion of the generic parameter list to the original
* one easier - you can use this helper methods. They know how such list
* must be coded. It's not a must to use it - but you can ...
*/
public static ArrayList<Object> encodeDispatch(
com.sun.star.util.URL[] aURL,
com.sun.star.beans.PropertyValue[][] lArgs)
{
int nLength = lArgs.length+1;
int nPos = 0;
ArrayList<Object> lParams = new ArrayList<Object>(nLength);
lParams.add( aURL[0] );
--nLength;
while (nLength>0)
{
lParams.add( lArgs[0][nPos] );
--nLength;
++nPos ;
}
return lParams;
}
public static void decodeDispatch(
ArrayList<Object> lParams,
com.sun.star.util.URL[] aURL,
com.sun.star.beans.PropertyValue[][] lArgs)
{
int nLength = lParams.size()-1;
int nPos = 0;
lArgs[0] = new com.sun.star.beans.PropertyValue[nLength];
aURL[0] = (com.sun.star.util.URL) lParams.get(0);
while (nPos<nLength)
{
lArgs[0][nPos] = (com.sun.star.beans.PropertyValue)
(lParams.get(nPos+1));
++nPos;
}
}
}
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