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dcrintea
Power User
Joined: 26 Feb 2004
Posts: 68
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 Posted: Mon Jun 06, 2005 5:14 am Post subject: using input streams: how to detect the type |
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I load OO file from a stream: how can I detect the file type?
I need the file type to validate possible convertion filters.
So, how can I detect the "file" type, if I use a stream instead of an url ?
thx. |
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ms777
Super User
Joined: 07 Feb 2004
Posts: 1355
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| Posted: Mon Jun 06, 2005 10:48 am Post subject: |
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this is the basics in BASIC ... see the TypeDetection Doc for all the details ... | Code: | Sub Main
sUrl = ConvertToUrl("C:\Windows\Desktop\test2.txt")
oSFA = createUNOService ("com.sun.star.ucb.SimpleFileAccess")
oInpStream = oSFA.openFileRead(sUrl)
Dim aProps(1) as new com.sun.star.beans.PropertyValue
aProps(0).Name = "InputStream"
aProps(0).Value = oInpStream
'To give the URL is not necessary.
'If no URL is given, bDeepDetection must be true, of course
aProps(1).Name = "URL"
aProps(1).Value = sUrl
oTD = createUnoService("com.sun.star.document.TypeDetection")
sType = oTD.queryTypeByDescriptor(aProps(), false)
oInpStream.closeInput()
msgbox sType
end sub
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dcrintea
Power User
Joined: 26 Feb 2004
Posts: 68
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| Posted: Tue Jun 07, 2005 4:20 am Post subject: thx |
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Thank you,
but what do you use to call createUnoService method ?
where can I find this API? |
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ms777
Super User
Joined: 07 Feb 2004
Posts: 1355
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dcrintea
Power User
Joined: 26 Feb 2004
Posts: 68
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| Posted: Tue Jun 07, 2005 5:13 am Post subject: hello |
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I use Java.
I tried:
| Code: |
PropertyValue testProperties[] = new PropertyValue[ 1 ];
testProperties[ 0 ] = new PropertyValue();
testProperties[ 0 ].Name = "InputStream";
testProperties[ 0 ].Value = is;
XTypeDetection td = xRemoteServiceManager.createInstance("com.sun.star.document.TypeDetection");
System.out.println(td.queryTypeByDescriptor(testProperties, true));
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but no success |
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dcrintea
Power User
Joined: 26 Feb 2004
Posts: 68
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| Posted: Tue Jun 07, 2005 5:25 am Post subject: |
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I do:
| Code: |
PropertyValue testProperties[] = new PropertyValue[ 1 ];
testProperties[ 0 ] = new PropertyValue();
testProperties[ 0 ].Name = "InputStream";
testProperties[ 0 ].Value = is;
XTypeDetection td = ( XTypeDetection ) UnoRuntime.queryInterface( XTypeDetection.class, xo );
System.out.println(td.queryTypeByDescriptor(testProperties, true));
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when I compile it says:
queryTypeByDescriptor(com.sun.star.beans.PropertyValue[][], boolean)
in com.sun.star.document.XTypeDetection cannot be applied to
(com.sun.star.beans.PropertyValue[], boolean)
What's wrong with the properties? |
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ms777
Super User
Joined: 07 Feb 2004
Posts: 1355
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| Posted: Tue Jun 07, 2005 5:26 am Post subject: |
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sorry - cant help you with Java
I would recommend to try first with td.queryTypeByUrl and a local file to see if the object instantiation works |
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dcrintea
Power User
Joined: 26 Feb 2004
Posts: 68
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| Posted: Tue Jun 07, 2005 5:49 am Post subject: ... |
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I've changed the properties to:
| Code: |
PropertyValue testProperties[][] = new PropertyValue[ 1 ][ 1 ];
testProperties[ 0 ][ 0 ] = new PropertyValue();
testProperties[ 0 ][ 0 ].Name = "InputStream";
testProperties[ 0 ][ 0 ].Value = is;
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BUT
XTypeDetection td = ( XTypeDetection ) UnoRuntime.queryInterface( XTypeDetection.class, xo);
create a null XTypeDetection.
Any idea? |
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DannyB
Moderator
Joined: 02 Apr 2003
Posts: 3991
Location: Lawrence, Kansas, USA
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| Posted: Tue Jun 07, 2005 6:16 am Post subject: |
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In this thread, but also a direct question over here
http://www.oooforum.org/forum/viewtopic.phtml?t=20890
there was a question about createUnoService() in Java. The other thread linked has some additional information.
Short simple answer to question about createUnoService.
Basic provides createUnoService() as a global convenience function. It is exactly equivalent to calling createInstance() on the global ServiceManager. (i.e. NOT on the service manager of some particular object, such as a document, but on the ServiceManager that you first obtain from your initial connection to OOo.)
Other Basic translation notes...
Basic also provides createUnoStruct(). This is easily done in Java by instantiating the specific struct (as a java class). e.g. a Basic call to createUnoStruct("com.sun.star.beans.PropertyValue") in Java would simply be to declare a variable and create a new instance....
PropertyValue xyz = new PropertyValue();
Basic provides a global variable StarDesktop. This is simply the singleton instance of the Desktop object that you get by calling createInstance( "com.sun.star.frame.Desktop" ) on the global service manager.
Basic provides HasUnoInterfaces() function which is simply a way to do introspection to see if a service supports particular interfaces. I have posted examples (search OOoForum for HasUnoInterfaces) of how to implement this function in other languages.
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Want to make OOo Drawings like the colored flower design to the left? |
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