[jboss-dev-forums] [Design of POJO Server] - Replacing system properties in metadata

Brian asked on another thread about automatically replacing system properties on annotations. First, I suppose if we were going to do this, it would need a meta annotation to trigger the behaviour otherwise it would be doing a lot of work unnecessarily. e.g. | @org.jboss.metadata.spi.Replaceable | public @interface Clustered | { | String partition() default = "${jboss.parition.name:DefaultDomain"; | } | Then we could add something to MetaDataRetrievalToMetaDataBridge that does the replacement, e.g. | | public <T extends Annotation> T getAnnotation(Class<T> annotationType) | { | if (annotationType == null) | throw new IllegalArgumentException("Null annotationType"); | AnnotationItem<T> item = retrieval.retrieveAnnotation(annotationType); | if (item == null) | return null; | - return item.getValue(); | + T result = item.getValue(); | + if (annotationType.hasAnnotation(Replaceable.class)) | + result = checkReplaceable(result); | + return result; | } | Where checkReplaceable() either 1) creates a new annotation from the original one with system properties replaced. 2) wraps the annotation in a dynamic proxy that implements the annotation interface and does the replacement lazily Similar code would be required for getAnnotations() View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4155761#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...