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OPENJPA-1712 add missing license header 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/2.0.x@986326 13f79535-47bb-0310-9956-ffa450edef68
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Donald Woods 2010-08-17 14:32:04 +00:00
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scripts/mmg.readme.txt
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Metamodel generator (mmg) Apache OpenJPA - Metamodel generator (mmg) README
Licensed under Apache License 2.0 - http://www.apache.org/licenses/LICENSE-2.0
--------------------------------------------------------------------------------
JPA 2.0 provides an utility to generate canonical metamodel for each persistent domain entity. JPA 2.0 provides an utility to generate canonical metamodel for each persistent
This brief note describes how to generate these canonical metamodel classes. domain entity. This brief note describes how to generate these canonical
metamodel classes.
The canonical metamodel classes are generated during compilation of persistent domain entity classes. The canonical metamodel classes are generated during compilation of persistent
The generation process depends on Annotation Processing facility available in JDK6. Naturally, this domain entity classes. The generation process depends on Annotation Processing
process *only* works if the persistent domain entity classes are compiled with a JDK6 compiler. facility available in JDK6. Naturally, this process *only* works if the
persistent domain entity classes are compiled with a JDK6 compiler.
Effectively, the process appears to be normal compilation process with a specialized Annotation Processor Effectively, the process appears to be normal compilation process with a
specialized Annotation Processor:
$ javac -classpath %CLASSPATH% <javac options> <mmg options> <*.java source files> $ javac -classpath %CLASSPATH% <javac options> <mmg options> <*.java source files>
Compiler Classpath Compiler Classpath
------------------ ------------------
The compiler classpath must include OpenJPA libraries. The compiler classpath must include OpenJPA libraries.
mmg options mmg options
----------- -----------
These options specify the Annotation processor to be used as well as options for the processor. The only mandatory These options specify the Annotation processor to be used as well as options
option is for the processor. The only mandatory option is:
-processor org.apache.openjpa.persistence.meta.AnnotationProcessor6 -processor org.apache.openjpa.persistence.meta.AnnotationProcessor6
The other options qualify the Annotation processor itself and specified with -A<option>=<value> syntax The other options qualify the Annotation processor itself and specified
with -A<option>=<value> syntax:
-Alog log level. Permissible values are TRACE, INFO and WARN. -Alog log level. Permissible values are TRACE, INFO and WARN.
Default is INFO. Default is INFO.
-Aout the directory location of the generated canonical model source output files. -Aout the directory location of the generated canonical model source output
Default is the current directory. files. Default is the current directory.
-Asource compatibility level of the generated canonical model source code. Permissible values are 5 and 6. -Asource compatibility level of the generated canonical model source code.
Default is 6. Permissible values are 5 and 6. Default is 6.
-Aheader flags if a header is created for the generated source code. Permissible values are true and false. -Aheader flags if a header is created for the generated source code.
Default is true. Permissible values are true and false. Default is true.