Re: [dev] Howto get the actual interface type of an UNO service object (via Java) ?
On 09/09/08 19:24, Rony G. Flatscher wrote: Hi there, while poking around a little bit I was wondering, how one could get at the Type[...] information via Java that the Java proxy object reveals, if asking it to render to a string. E.g. in the following (interactive) session Java is used as the bridge for the scripting language ooRexx; first a Desktop service object is created and assigned to a variable a, then its com.sun.star.frame.XDesktop interface is assigned to variabel b and from it the com.sun.star.beans.XPropertySet interface is assigned to variable c. Sending the toString message to all three proxy objects displays them allowing to distinguish which interface type they represent. In the example session below (please watch out for line-wraps) that interface type is the last comma separated token in the form of Type[...interface_name...]. Now the question: how can one get at exactly that piece of information via Java at runtime? You can't, easily. (Maybe you can via reflection). As of DEV300m31, every Java proxy object must implement interface com.sun.star.lib.uno.Proxy (see jurt/com/sun/star/lib/uno/Proxy.java:1.4), and the two cases that do are defined in jurt/com/sun/star/lib/uno/bridges/java_remote/ProxyFactory.java:1.8 (for the remote URP bridge), storing the relevant data as private final Type type;, and in bridges/source/jni_uno/java/com/sun/star/bridges/jni_uno/JNI_proxy.java (for the in-process JNI bridge), storing the relevant data as protected Type m_type;. Besides, that a proxy handles only a single interface (plus parent interfaces) of a UNO object is, of course, an implementation detail that can always change. -Stephan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [dev] Howto get the actual interface type of an UNO service object (via Java) ?
Hi Stephan, while poking around a little bit I was wondering, how one could get at the Type[...] information via Java that the Java proxy object reveals, if asking it to render to a string. E.g. in the following (interactive) session Java is used as the bridge for the scripting language ooRexx; first a Desktop service object is created and assigned to a variable a, then its com.sun.star.frame.XDesktop interface is assigned to variabel b and from it the com.sun.star.beans.XPropertySet interface is assigned to variable c. Sending the toString message to all three proxy objects displays them allowing to distinguish which interface type they represent. In the example session below (please watch out for line-wraps) that interface type is the last comma separated token in the form of Type[...interface_name...]. Now the question: how can one get at exactly that piece of information via Java at runtime? You can't, easily. (Maybe you can via reflection). As of DEV300m31, every Java proxy object must implement interface com.sun.star.lib.uno.Proxy (see jurt/com/sun/star/lib/uno/Proxy.java:1.4), and the two cases that do are defined in jurt/com/sun/star/lib/uno/bridges/java_remote/ProxyFactory.java:1.8 (for the remote URP bridge), storing the relevant data as private final Type type;, and in bridges/source/jni_uno/java/com/sun/star/bridges/jni_uno/JNI_proxy.java (for the in-process JNI bridge), storing the relevant data as protected Type m_type;. Thank you very much for these interesting pointers! Just another question: how about if I were to run the toString() method against a service object proxy and parse the type information. This way it's the proxy's toString()-method problem to figure out and supply the interface type. (Performance in the context of the thought for use-cases is not an issue at all, given those warped PCs people have come to use today.) Besides, that a proxy handles only a single interface (plus parent interfaces) of a UNO object is, of course, an implementation detail that can always change. Sure. Actually, what I am after is to determine at runtime whether the service object in hand got a queryInterface for a specific interface carried out already or not. Currently, it would be important to find out whether the com.sun.star.beans.XPropertySet interface was queried already (i.e. whether its methods would be available already, or whether one needs to query that interface). However, this may be interesting in other contexts, where a service object is returned and it may be interesting to know which interfaces got queried for already. ---rony - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[dev] Howto get the actual interface type of an UNO service object (via Java) ?
Hi there, while poking around a little bit I was wondering, how one could get at the Type[...] information via Java that the Java proxy object reveals, if asking it to render to a string. E.g. in the following (interactive) session Java is used as the bridge for the scripting language ooRexx; first a Desktop service object is created and assigned to a variable a, then its com.sun.star.frame.XDesktop interface is assigned to variabel b and from it the com.sun.star.beans.XPropertySet interface is assigned to variable c. Sending the toString message to all three proxy objects displays them allowing to distinguish which interface type they represent. In the example session below (please watch out for line-wraps) that interface type is the last comma separated token in the form of Type[...interface_name...]. Now the question: how can one get at exactly that piece of information via Java at runtime? E:\rony\dev\bsf\src\binrexxtry REXX-ooRexx_3.2.0(MT) 6.02 16 Jun 2008 rexxtry.rex lets you interactively try REXX statements. Each string is executed when you hit Enter. Enter 'call tell' for a description of the features. Go on - try a few...Enter 'exit' to end. call uno.cls ... rexxtry.rex on WindowsNT a=uno.createDesktop() /* creates and returns a desktop service object */ ... rexxtry.rex on WindowsNT b=a~XDesktop /* queries the com.sun.star.frame.XDestkop interface */ ... rexxtry.rex on WindowsNT c=b~XPropertySet /* queries the com.sun.star.beans.XPropertySet interface */ ... rexxtry.rex on WindowsNT say a~toString /* ask the proxy for its string representation */ [Proxy:9938272,4c801ac;msci[0];71a4c62fd6a4ea18dca702d3c4a726d,Type[com.sun.star.uno.XInterface]] ... rexxtry.rex on WindowsNT say b~toString /* ask the proxy for its string representation */ [Proxy:32134769,4c801ac;msci[0];71a4c62fd6a4ea18dca702d3c4a726d,Type[com.sun.star.frame.XDesktop]] ... rexxtry.rex on WindowsNT say c~toString /* ask the proxy for its string representation */ [Proxy:30495813,4c801ac;msci[0];71a4c62fd6a4ea18dca702d3c4a726d,Type[com.sun.star.beans.XPropertySet]] ... rexxtry.rex on WindowsNT say a~uno.getTypeName b~uno.getTypeName c~uno.getTypeName /* get the IDL type name via reflection */ UNO_SERVICE UNO_SERVICE UNO_SERVICE ... rexxtry.rex on WindowsNT say uno.areSame(a,b) uno.areSame(b,c) uno.areSame(a,c) /* test whether all three are the same object */ 1 1 1 ... rexxtry.rex on WindowsNT TIA for any pointers/hints, ---rony
