View source for OT Bytecode Attributes/PlayedBy

=Attribute PlayedBy=

===Intent===
This attribute stores the base class a role class is bound to.
 
The PlayedBy attribute is a fixed-length attribute used in the attributes table of the ClassFile structure.

===Location:===
A role class which, or which super role class, is bound to a base class.

===Content:===
The name of the bound base class.

===Purpose:===
The OTRE records the baseclass name from this attribute in order to associate it with [[../CallinMethodMappings]] being read after this attribute.

Also for each class with a <tt>PlayedBy</tt> attribute the superclass relationship is recorded, which is important for inheritance of method bindings.

===Format:===
<pre>    PlayedBy {
     u2 attribute_name_index;
     u4 attribute_length;
     u2 base_class_name_index;
    }</pre>

The items of the PlayedBy structure are as follows: 
*attribute_name_index
:The constant_pool entry at that index must be a CONSTANT_Utf8_info representing the string "PlayedBy". 
*attribute_length
:The value of the attribute_length item indicates the length of the attribute, excluding the initial six bytes. 
*base_class_name_index
:The constant_pool index representing the fully qualified name of the base class, as given in the source code from which this class file was compiled.

[[Category:Object Teams Development]]