pax-exam or something?

- Jonathan

Iterable<BeanEntry<MyQualifier, ConfigurationEntry>> entries;

- Jonathan

On 11 Jan 2013, at 23:16, Jonathan Doklovic wrote:

Let me ask this a different way....

Is there a way in sisu to easily get a collection of classes (not objects) that implement a given interface and/or have a specific annotation?

For example, I have classes that implement ConfigurationEntry. I need to find all of those classes (across bundles) and pass their class objects to a gson type adapter. These classes should NOT be instantiated/wired by guice.

If you want details of all implementations of ConfigurationEntry without instantiating them then you can use:

    @Inject Iterable<BeanEntry<Named, ConfigurationEntry>> entries;

If you want details of all implementations of ConfigurationEntry that have a specific Qualifier then you can use:

    @Inject Iterable<BeanEntry<MyQualifier, ConfigurationEntry>> entries;

If you want details of all implementations that have a specific Qualifier then you can use:

    @Inject Iterable<BeanEntry<MyQualifier, Object>> entries;

The BeanEntry API lets you query various details such as the implementation class without needing to eagerly instantiate the component:

    http://git.eclipse.org/c/sisu/org.eclipse.sisu.inject.git/plain/org.eclipse.sisu.inject/src/org/eclipse/sisu/BeanEntry.java

all the various dynamic Lists/Maps/etc. provided by Sisu are actually driven by BeanEntry under the covers - the only difference is the view onto the BeanEntry sequence.

HTH

Thanks,

- Jonathan

On 01/11/2013 01:42 PM, Stuart McCulloch wrote:

On 11 Jan 2013, at 20:25, Jonathan Doklovic wrote:

Hi,

I have an annotation that's tagged with @Qualifier and a class that uses my annotation.
I expected to see a new file in META-INF/sisu for this class, but it doesn't get generated.
the @Named index is being generated properly just not my custom annotation.

Am I missing something?

The current indexer will pick up other @Qualifiers, but at the moment the qualified class is only added to the @Named index, as from Sisu's perspective it treats any component with a @Qualifier as being implicitly @Named.

Likewise the container only queries the 'META-INF/sisu/javax.inject.Named' file when performing an indexed scan, because 1) it lists all known qualified components and 2) it is much faster to call getResource on a fixed path than hunt for all resources under the 'META-INF/sisu/' path (plus not all classloaders expose enough information about the underlying resource URLs to perform such a scan). Note this index is only used to list the qualified components needing runtime scanning to avoid having to brute-force scan the classpath, the binding and query features both work off the runtime annotations found when loading the component class.

Originally the idea was to have a file per-@Qualifier, but the benefit of every qualified component being implicitly @Named and therefore 'META-INF/sisu/javax.inject.Named' list all know qualified components meant this was implemented first - and since the container only needs this file the indexer hasn't yet been extended to write out the other @Qualifier files (although it does have the necessary information to do this). There was a discussion about choosing a different name for this 'any qualified component list', but at the time we already had jars using this format and it also lets us add other @Qualifier files in the future (which would then be subsets of the main javax.inject.Named index).

So basically you can index components with other @Qualifiers, and query them using those @Qualifiers, but at the moment they only get listed in the canonical 'META-INF/sisu/javax.inject.Named' file.

HTH

- Jonathan

_______________________________________________
sisu-dev mailing list
sisu-dev@xxxxxxxxxxx
http://dev.eclipse.org/mailman/listinfo/sisu-dev

_______________________________________________
sisu-dev mailing list
sisu-dev@xxxxxxxxxxx
http://dev.eclipse.org/mailman/listinfo/sisu-dev

Thanks,

- Jonathan

On 11 Jan 2013, at 20:25, Jonathan Doklovic wrote:

Hi,

I have an annotation that's tagged with @Qualifier and a class that uses my annotation.
I expected to see a new file in META-INF/sisu for this class, but it doesn't get generated.
the @Named index is being generated properly just not my custom annotation.

Am I missing something?

The current indexer will pick up other @Qualifiers, but at the moment the qualified class is only added to the @Named index, as from Sisu's perspective it treats any component with a @Qualifier as being implicitly @Named.

Likewise the container only queries the 'META-INF/sisu/javax.inject.Named' file when performing an indexed scan, because 1) it lists all known qualified components and 2) it is much faster to call getResource on a fixed path than hunt for all resources under the 'META-INF/sisu/' path (plus not all classloaders expose enough information about the underlying resource URLs to perform such a scan). Note this index is only used to list the qualified components needing runtime scanning to avoid having to brute-force scan the classpath, the binding and query features both work off the runtime annotations found when loading the component class.

Originally the idea was to have a file per-@Qualifier, but the benefit of every qualified component being implicitly @Named and therefore 'META-INF/sisu/javax.inject.Named' list all know qualified components meant this was implemented first - and since the container only needs this file the indexer hasn't yet been extended to write out the other @Qualifier files (although it does have the necessary information to do this). There was a discussion about choosing a different name for this 'any qualified component list', but at the time we already had jars using this format and it also lets us add other @Qualifier files in the future (which would then be subsets of the main javax.inject.Named index).

So basically you can index components with other @Qualifiers, and query them using those @Qualifiers, but at the moment they only get listed in the canonical 'META-INF/sisu/javax.inject.Named' file.

HTH

- Jonathan

_______________________________________________
sisu-dev mailing list
sisu-dev@xxxxxxxxxxx
http://dev.eclipse.org/mailman/listinfo/sisu-dev

_______________________________________________
sisu-dev mailing list
sisu-dev@xxxxxxxxxxx
http://dev.eclipse.org/mailman/listinfo/sisu-dev