Class AnnotationDefaultAttribute

The AnnotationDefault attribute is a variable length attribute in the attributes table of certain method_info structures, namely those representing elements of annotation types. The AnnotationDefault attribute records the default value for the element represented by the method_info structure. Each method_info structures representing an element of an annotation types may contain at most one AnnotationDefault attribute. The JVM must make this default value available so it can be applied by appropriate reflective APIs.

The AnnotationDefault attribute has the following format:

    AnnotationDefault_attribute {
      u2 attribute_name_index;
      u4 attribute_length;
      element_value default_value;
    }
 

The items of the AnnotationDefault structure are as follows:

attribute_name_index

The value of the attribute_name_index item must be a valid index into the constant_pool table. The constant_pool entry at that index must be a CONSTANT_Utf8_info structure representing the string "AnnotationDefault".

attribute_length

The value of the attribute_length item indicates the length of the attribute, excluding the initial six bytes. The value of the attribute_length item is thus dependent on the default value.

default_value

The default_value item represents the default value of the annotation type org.objectweb.asm.attrs.AnnotationElementValue element whose default value is represented by this AnnotationDefault attribute.

Author: Eugene Kuleshov

See Also: JSR 175 : A Metadata Facility for the Java Programming Language