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Date: Thu, 20 Jun 2013 12:48:22 +0530
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Subject: Re: OpenCommandArgument2 Data Sink
From: Rajath Shashidhara <rajaths.rajaths@gmail.com>
To: dev <dev@openoffice.apache.org>
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Hello Ariel,

in you code:
copyStream() is to be implemented by me or is it there in any library?


On Thu, Jun 20, 2013 at 9:25 AM, Rajath Shashidhara <
rajaths.rajaths@gmail.com> wrote:

> Thanks ariel.
> I have finished major part of this code. I only had doubt in that
> queryInterface part.
>
>
> On Thu, Jun 20, 2013 at 1:08 AM, Ariel Constenla-Haile <arielch@apache.org
> > wrote:
>
>> Hi Rajath,
>>
>> On Wed, Jun 19, 2013 at 09:55:21PM +0530, Rajath Shashidhara wrote:
>> > Hello,
>> >
>> > I'm working on the XActiveDataSink.
>> > I'm slightly confused about how to handle OpenCommandArgument2.Sink .
>> > The object is the one which is filled with the XActiveDataSink object
>> for
>> > which I have to set the InputStream by calling setInputStream() and pass
>> > the XInputStream implementation.
>> > This is what I have understood. But, the confusing thing is why  is the
>> > datatype for Sink - Object? Shoudnt it be XActiveDataSink? I'm not
>> > understanding how to handle this Sink.
>>
>> The OpenCommandArgument2.Sink can be of different kinds, that's why its
>> type is defined in a generic way as css.uno.XInterface; this interface
>> is the base interface of all other interfaces:
>>
>> http://www.openoffice.org/api/docs/common/ref/com/sun/star/ucb/OpenCommandArgument.html#Sink
>>
>> css.uno.XInterface, in this case, is mapped in the Jave bridge to
>> java.lang.Object:
>>
>> http://wiki.openoffice.org/wiki/Documentation/DevGuide/ProUNO/Java/Mapping_of_Interface_Types
>>
>> You have to find out if the sink is
>>
>> a) com.sun.star.io.XOutputStream
>> b) com.sun.star.io.XActiveDataSink
>> c) com.sun.star.io.XActiveDataStreamer
>>
>> simply query the sink for each interface. Something like this:
>>
>>
>> private Object open(
>>         com.sun.star.ucb.OpenCommandArgument2 aOpenCommand,
>>         com.sun.star.ucb.XCommandEnvironment xEnvironment)
>>         throws com.sun.star.uno.Exception {
>>     Object oRet = com.sun.star.uno.Any.VOID;
>>
>>     int nOpenMode = aOpenCommand.Mode;
>>     if (nOpenMode == com.sun.star.ucb.OpenMode.ALL
>>             || nOpenMode == com.sun.star.ucb.OpenMode.DOCUMENTS
>>             || nOpenMode == com.sun.star.ucb.OpenMode.FOLDERS) {
>>         if (!isFolder(xEnvironment)) {
>>             throw new com.sun.star.lang.IllegalArgumentException(
>>                     "The content is not a folder!");
>>         }
>>         com.sun.star.ucb.XDynamicResultSet xResultSet = new
>> DynamicResultSet(
>>                 m_xContext, this, aOpenCommand, xEnvironment);
>>         oRet = xResultSet;
>>     } else if (nOpenMode == com.sun.star.ucb.OpenMode.DOCUMENT) {
>>         Object aSink = aOpenCommand.Sink;
>>         if (aSink == null) {
>>             throw new com.sun.star.lang.IllegalArgumentException(
>>                     "open command without sink!");
>>         }
>>         // the Sink can be
>>         // a) com.sun.star.io.XOutputStream
>>         // b) com.sun.star.io.XActiveDataSink
>>         // c) com.sun.star.io.XActiveDataStreamer
>>         com.sun.star.io.XActiveDataStreamer xActiveDataStreamer =
>> UnoRuntime.queryInterface(
>>                 com.sun.star.io.XActiveDataStreamer.class, aSink);
>>         if (xActiveDataStreamer != null) {
>>             com.sun.star.io.XStream xStream =
>> getContentStream(xEnvironment);
>>             xActiveDataStreamer.setStream(xStream);
>>         } else {
>>             com.sun.star.io.XOutputStream xOutputStream =
>> UnoRuntime.queryInterface(
>>                     com.sun.star.io.XOutputStream.class, aSink);
>>             if (xOutputStream != null) {
>>                 com.sun.star.io.XInputStream xInputStream =
>> getContentInputStream(xEnvironment);
>>                 copyStream(xInputStream, xOutputStream);
>>             } else {
>>                 com.sun.star.io.XActiveDataSink xActiveDataSink =
>> UnoRuntime.queryInterface(
>>                         com.sun.star.io.XActiveDataSink.class, aSink);
>>                 if (xActiveDataSink == null) {
>>                     throw new com.sun.star.lang.IllegalArgumentException(
>>                             "open command's sink is neither
>> XActiveDataStreamer, XOutputStream nor XActiveDataSink!");
>>                 }
>>                 com.sun.star.io.XInputStream xInputStream =
>> getContentInputStream(xEnvironment);
>>                 xActiveDataSink.setInputStream(xInputStream);
>>             }
>>         }
>>     } else if (nOpenMode ==
>> com.sun.star.ucb.OpenMode.DOCUMENT_SHARE_DENY_NONE ||
>>             nOpenMode ==
>> com.sun.star.ucb.OpenMode.DOCUMENT_SHARE_DENY_WRITE){
>>         throw new UnsupportedCommandException();
>>     }
>>     return oRet;
>> }
>>
>>
>>
>> Regards
>> --
>> Ariel Constenla-Haile
>> La Plata, Argentina
>>
>
>
>
> --
> Rajath S,
> M.Sc(Hons.) Physics,
> Birla Institute of Technology and Science - Pilani,
> Pilani
>


-- 
Rajath S,
M.Sc(Hons.) Physics,
Birla Institute of Technology and Science - Pilani,
Pilani

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