[Springframework-developer] Attributes - any alternative for commons-attributes ?

[Cameron B. <ca...@da...>]

I am trying to use commons-attributes to create transactional attributes for
some beans.
 
I can't seem to get the commons-attributes compiler to work .. it doesn't
like my source code, see stack trace below.
 
Before I dive into the source code for commons-attributes, I would like to
ask if there are plans to support another metadata system.
 
If there aren't plans, can you recommend another metadata system that I
could investigate implementing myself.
 
I have had a look at 
  * attrib4j - it modifies the classes, which makes using eclipse a pain.
  * nanning attributes may work, though they don't offer instance based
attributes ( only strings as far as I can see)
  * I am currently trying qdox attributes, but the jar they provide doesn't
have the right classes.. I am trying a source build.
 
stacktrace :
compile.attributes:
[attribute-compiler] java.lang.StringIndexOutOfBoundsException: String index
out of range: 0
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.start(AttributeComp
iler.java:455)
[attribute-compiler]    at
xjavadoc.ant.XJavadocTask.execute(XJavadocTask.java:96)
[attribute-compiler]    at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:166)
[attribute-compiler]    at org.apache.tools.ant.Task.perform(Task.java:319)
[attribute-compiler]    at
org.apache.tools.ant.Target.execute(Target.java:309)
[attribute-compiler]    at
org.apache.tools.ant.Target.performTasks(Target.java:336)
[attribute-compiler]    at
org.apache.tools.ant.Project.executeTarget(Project.java:1306)
[attribute-compiler]    at
org.apache.tools.ant.Project.executeTargets(Project.java:1250)
[attribute-compiler]    at org.apache.tools.ant.Main.runBuild(Main.java:610)
[attribute-compiler]    at org.apache.tools.ant.Main.start(Main.java:196)
[attribute-compiler]    at org.apache.tools.ant.Main.main(Main.java:235)
[attribute-compiler] Caused by: java.lang.StringIndexOutOfBoundsException:
String index out of range: 0
[attribute-compiler]    at java.lang.String.charAt(String.java:444)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.isAttribute(Attribu
teCompiler.java:439)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.tagHasAttributes(At
tributeCompiler.java:464)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.elementHasAttribute
s(AttributeCompiler.java:206)
 
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.hasAttributes(Attri
buteCompiler.java:420)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.generateClass(Attri
buteCompiler.java:257)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.start(AttributeComp
iler.java:452)
[attribute-compiler]    ... 10 more
[attribute-compiler] --- Nested Exception ---
[attribute-compiler] java.lang.StringIndexOutOfBoundsException: String index
out of range: 0
[attribute-compiler]    at java.lang.String.charAt(String.java:444)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.isAttribute(Attribu
teCompiler.java:439)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.tagHasAttributes(At
tributeCompiler.java:464)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.elementHasAttribute
s(AttributeCompiler.java:206)
 
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.hasAttributes(Attri
buteCompiler.java:420)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.generateClass(Attri
buteCompiler.java:257)
[attribute-compiler]    at
org.apache.commons.attributes.compiler.AttributeCompiler.start(AttributeComp
iler.java:452)
[attribute-compiler]    at
xjavadoc.ant.XJavadocTask.execute(XJavadocTask.java:96)
[attribute-compiler]    at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:166)
[attribute-compiler]    at org.apache.tools.ant.Task.perform(Task.java:319)
[attribute-compiler]    at
org.apache.tools.ant.Target.execute(Target.java:309)
[attribute-compiler]    at
org.apache.tools.ant.Target.performTasks(Target.java:336)
[attribute-compiler]    at
org.apache.tools.ant.Project.executeTarget(Project.java:1306)
[attribute-compiler]    at
org.apache.tools.ant.Project.executeTargets(Project.java:1250)
[attribute-compiler]    at org.apache.tools.ant.Main.runBuild(Main.java:610)
[attribute-compiler]    at org.apache.tools.ant.Main.start(Main.java:196)
[attribute-compiler]    at org.apache.tools.ant.Main.main(Main.java:235)
[attribute-compiler] WARNING: Some classes refer to other classes that were
not found among the sources or on the classpath.
[attribute-compiler]          (Perhaps the referred class doesn't exist?
Hasn't been generated yet?)
[attribute-compiler]          The referring classes do not import any fully
qualified classes matching these classes.
[attribute-compiler]          Since at least one package is imported, it is
impossible for xjavadoc to figure out
[attribute-compiler]          what package the referred classes belong to.
The classes are: