AnnotationReader (Jython API documentation)
Date: 2012-08-13

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## org.python.core
Class AnnotationReader

    java.lang.Object
      org.objectweb.asm.commons.EmptyVisitor
          org.python.core.AnnotationReader

All Implemented Interfaces:
  org.objectweb.asm.AnnotationVisitor, org.objectweb.asm.ClassVisitor, org.objectweb.asm.FieldVisitor, org.objectweb.asm.MethodVisitor

    public class AnnotationReader

extends org.objectweb.asm.commons.EmptyVisitor

This class reads a classfile from a byte array and pulls out the value of the class annotation for APIVersion, which can then be retrieved by a call to getVersion(). Hopefully the use of ClassReader in this implementation is not too expensive. I suspect it is not since EmptyVisitor is just a bag of empty methods so shouldn't cost too much. If it turns out to cost too much, we will want to implement a special purpose ClassReader that only reads out the APIVersion annotation I think.

Constructor Summary
`AnnotationReader(byte[] data)` Reads the classfile bytecode in data and to extract the version.

Method Summary
`long` | `getMTime()`
`int` | `getVersion()`
`void` | `visit(String name, Object value)`
`org.objectweb.asm.AnnotationVisitor` | `visitAnnotation(String desc, boolean visible)`

Methods inherited from class org.objectweb.asm.commons.EmptyVisitor
`visit, visitAnnotation, visitAnnotationDefault, visitArray, visitAttribute, visitCode, visitEnd, visitEnum, visitField, visitFieldInsn, visitFrame, visitIincInsn, visitInnerClass, visitInsn, visitIntInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLocalVariable, visitLookupSwitchInsn, visitMaxs, visitMethod, visitMethodInsn, visitMultiANewArrayInsn, visitOuterClass, visitParameterAnnotation, visitSource, visitTableSwitchInsn, visitTryCatchBlock, visitTypeInsn, visitVarInsn`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### AnnotationReader

    public AnnotationReader(byte[] data)
                     throws IOException

  Reads the classfile bytecode in data and to extract the version.

  Throws:
    `IOException` - - if the classfile is malformed.

Method Detail

### visitAnnotation

    public org.objectweb.asm.AnnotationVisitor visitAnnotation(String desc,
                                                               boolean visible)

  Specified by:
    `visitAnnotation` in interface `org.objectweb.asm.ClassVisitor`
  Specified by:
    `visitAnnotation` in interface `org.objectweb.asm.FieldVisitor`
  Specified by:
    `visitAnnotation` in interface `org.objectweb.asm.MethodVisitor`
  Overrides:
    `visitAnnotation` in class `org.objectweb.asm.commons.EmptyVisitor`

### visit

    public void visit(String name,
                      Object value)

  Specified by:
    `visit` in interface `org.objectweb.asm.AnnotationVisitor`
  Overrides:
    `visit` in class `org.objectweb.asm.commons.EmptyVisitor`

### getVersion

    public int getVersion()

### getMTime

    public long getMTime()

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