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From "Martin Zaun (JIRA)" <j...@apache.org>
Subject [jira] Created: (JDO-195) JDO11 RI enhancer support for JDK1.5 classfiles
Date Fri, 28 Oct 2005 15:48:55 GMT
JDO11 RI enhancer support for JDK1.5 classfiles
-----------------------------------------------

         Key: JDO-195
         URL: http://issues.apache.org/jira/browse/JDO-195
     Project: JDO
        Type: New Feature
  Components: ri11  
    Reporter: Martin Zaun
 Assigned to: Martin Zaun 


The JDO11 RI enhancer should be extended to support JDK 1.5 classfiles.

According to the JDK 1.5 ammendments to the VM Spec, 2nd edition
  http://java.sun.com/docs/books/vmspec/2nd-edition/jvms-maintenance.html
support for the following new features is needed:

- new major, minor version number: {49,0}

- new access and property modifiers:
  - new class modifiers:
    ACC_ANNOTATION 0x2000 Declared as an annotation type.
    ACC_ENUM 0x4000 Declared as an enum type.
  - new field flag:
    ACC_ENUM 0x4000 Declared as an element of an enum.
  - new method flags:
    ACC_BRIDGE 0x0040 A bridge method, generated by the compiler.
    ACC_VARARGS 0x0080 Declared with variable number of arguments.

- new opcode: invokedynamic
  Operation: Invoke instance method; resolve and dispatch based on class
  Format: invokedynamic, indexbyte1, indexbyte2
  Forms: invokedynamic = 186 (0xba)
  Operand Stack: ..., objectref, [arg1, [arg2 ,T](B] => ...

- new ldc, ldc_w operand type: CONSTANT_Class

- new Signature Attribute
  It needs to be investigated whether Signature attributes have to be
  supplied for JDO methods that carry the type of managed fields or
  the PC class as parameter or return.

- The other new, pre-defined attributes don't need explicit support but
  can be handled by the enhancer generically:
  - new EnclosingMethod attribute
  - new RuntimeVisibleAnnotations attribute
  - new RuntimeInvisibleAnnotations attribute
  - new RuntimeVisibleParameterAnnotations attribute
  - new RuntimeInvisibleParameterAnnotations attribute
  - new AnnotationDefault attribute
  - new SourceDebugExtension Attribute
  - new LocalVariableTypeTable Attribute


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