Minor Description
Running the MappingToolTask causes an error like this :
Buildfile: build.xml
clean:
[delete] Deleting directory /home/mikedd/workspaces/jpa/ant/target
compile:
[mkdir] Created dir: /home/mikedd/workspaces/jpa/ant/target
[javac] Compiling 1 source file to /home/mikedd/workspaces/jpa/ant/target
[mkdir] Created dir: /home/mikedd/workspaces/jpa/ant/target/META-INF
[copy] Copying 2 files to /home/mikedd/workspaces/jpa/ant/target/META-INF
enhance:
map:
[mapping] 87 persistence-tests INFO [main] openjpa.jdbc.JDBC - Using dictionary class "org.apache.openjpa.jdbc.sql.DerbyDictionary".
[mapping] 169 persistence-tests INFO [main] openjpa.Tool - Mapping tool running on type "class mdd.TestEntity" with action "buildSchema".
[mapping] <openjpa-1.1.0-SNAPSHOT-r420667:580087 fatal user error> org.apache.openjpa.util.MetaDataException: Type "class mdd.TestEntity" does not have persistence metadata.
[mapping] at org.apache.openjpa.jdbc.meta.MappingTool.getMapping(MappingTool.java:679)
[mapping] at org.apache.openjpa.jdbc.meta.MappingTool.buildSchema(MappingTool.java:745)
[mapping] at org.apache.openjpa.jdbc.meta.MappingTool.run(MappingTool.java:643)
[mapping] at org.apache.openjpa.jdbc.meta.MappingTool.run(MappingTool.java:1066)
[mapping] at org.apache.openjpa.jdbc.ant.MappingToolTask.executeOn(MappingToolTask.java:194)
[mapping] at org.apache.openjpa.lib.ant.AbstractTask.execute(AbstractTask.java:172)
[mapping] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
[mapping] at org.apache.tools.ant.Task.perform(Task.java:364)
[mapping] at org.apache.tools.ant.Target.execute(Target.java:341)
[mapping] at org.apache.tools.ant.Target.performTasks(Target.java:369)
[mapping] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
[mapping] at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
[mapping] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
[mapping] at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
[mapping] at org.apache.tools.ant.Main.runBuild(Main.java:668)
[mapping] at org.apache.tools.ant.Main.startAnt(Main.java:187)
[mapping] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:246)
[mapping] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:67)
Running from the command line generates the expected result :
52 persistence-tests INFO [main] openjpa.jdbc.JDBC - Using dictionary class "org.apache.openjpa.jdbc.sql.DerbyDictionary".
59 persistence-tests INFO [main] openjpa.Tool - No targets were given. Running on all classes listed in your configuration, or all persistent classes in the classpath if no classes are configured. Use -help to display tool usage information.
130 persistence-tests INFO [main] openjpa.Tool - Mapping tool running on type "class mdd.TestEntity" with action "buildSchema".
343 persistence-tests INFO [main] openjpa.Tool - Recording mapping and schema changes.
The root problem here lies with the ant classloaders. The ant classloader appears to be unable to load the annotation classes unless they're found in ${ANT_HOME}/lib.
Example :
@Entity
public class MyEntity {
// . . .
}
MyEntity.class.isAnnotationPresent(Entity.class);
// returns false with the ant classloader
// returns true with the ant classloader if you copy geronimo-jpa_3.0_spec-1.0.jar to ${ANT_HOME}/lib
// returns true if we create a temporary classloader - similar to the PCEnhancerTask.