Re: [Springframework-developer] non-String keys for map entries

[Les A. H. <le...@ha...>]

I think the following two are the best candidates:

<map>
  <entry>
    <key bean=3D"myBean"/>     <!-- or <key local=3D"myBean"/>     -->
    <value bean=3D"myTarget"/> <!-- or <value local=3D"myTarget"/> -->
  </entry>
</map>

or (verbose version of above):

<map>
  <entry>
    <key><ref bean=3D"myBean"/></key>
    <value><ref bean=3D"myTarget"/></value>
  </entry>
</map>


I really like the first version, and I think it is the most readable.  I don=
't
know if it would break backwards compatibility though.  Whatever the decisio=
n I
think the most important factor (logically) is that the key and value elemen=
ts
remain xml peers to accurately reflect the Object structure.

So, the following (IMO) would not be a good candidate as it isn't readable a=
s
the first two and doesn't visually reflect the actual object structure of
Map.Entry :

<map>
  <entry key=3D"myKey">
    <ref bean=3D"myTarget"/>
  </entry>
</map>


Les




Quoting tho...@tr...:

> I too think this would be valuable.
>
> I'd like to keep it simple.  The following seems to me the most consistent
> with
> the current syntax and with the Map interface itself:
>
> <map>
>   <entry keyref=3D"myBean">
>     <ref bean=3D"myTarget"/>
>   </entry>
> </map>
>
> or
>
> <map>
>   <entry>
>     <key>
>       <ref bean=3D"myKeyBean"/>
>     </key>
>     <value>
>       <ref bean=3D"myTargetBean"/>
>     </value>
>   </entry>
> </map>
>
> This should also be valid, but I would not recommend using it:
>
> <map>
>   <entry>
>     <key>
>       <ref bean=3D"myKeyBean"/>
>     </key>
>     <ref bean=3D"myTargetBean"/>
>   </entry>
> </map>
>
>
> Thomas
>
>
>
> Quoting Colin Sampaleanu <col...@ex...>:
>
> > I agree it would be very good to have. I've been hit a few times by the
> > lack.
> >
> > I am ok with your syntax, given that probably most of the uses will
> > still be the simple case. An alternative would be to have another kind
> > of entry allowed
> >
> > <map>
> >   <complexentry>
> >     <key>
> >       <ref bean=3D"myKey"/>
> >     </key>
> >     <value>
> >       <ref bean=3D"myTarget"/>
> >     </value>
> >   </complexentry>
> > </map>
> >
> > 'complexentry' is just a name I came up with now. I don't really like it
> > or think it that suitable...
> >
> > Colin
> >
> >
> > j=C3=BCrgen h=C3=B6ller [werk3AT] wrote:
> >
> > >A colleague of mine just suggested that <entry> tags in XML bean
> definitions
> > should also support non-String keys: After all, a java.util.Map can take
> any
> > Object as key.
> > >
> > >So instead of just the current:
> > >
> > ><map>
> > >  <entry key=3D"myKey">
> > >    <ref bean=3D"myTarget"/>
> > >  </entry>
> > ></map>
> > >
> > >We could also support something like the following:
> > >
> > ><map>
> > >  <entry>
> > >    <key>
> > >      <ref bean=3D"myKey"/>
> > >    </key>
> > >    <ref bean=3D"myTarget"/>
> > >  </entry>
> > ></map>
> > >
> > >The problem is the syntax: It looks odd to have the <ref> Map value at =
the
> > same level as the <key> subtag, with the latter having a nested <ref>
> > again...
> > >
> > >Any ideas?
> > >
> > >Juergen
> > >
> > >
> > >DI J=C3=BCrgen H=C3=B6ller
> > >Senior System Architect
> > >______________________________________
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> > >
> > >t.  +43 (0) 732 71 65 29 502
> > >f.  +43 (0) 732 71 65 29 3
> > >mailto:jue...@we...
> > >http://www.werk3at.com
> > >______________________________________
> > >werk3ATS - WIR ENTWICKELN ERFOLG
> > >
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