Attributes
Attributes for classes, fields and methods.
Attributes are used to store any type of data in class files about
any method, field or class.
All attributes are inside a "container" that provide
the VM with information about the name and length in bytes
of the attribute. If the VM does not know about an attribute
it can simply skip it but it should understand the official
attributes.
Official attributes as of the 2nd ed. of the VM Spec
Synthetic
Compiler generated field/method/class.
It did not appear in the source code.
Deprecated
Used for informative purposes. (optional).
SourceFile
Points to the constant pool for the name of the source file. (optional).
ConstantValue
Holds the constant pool index for the value of final variables.
Code
Holds the code and other relevant information for methods.
Exceptions
A table with references to the exceptions thrown.
InnerClasses
References for Inner classes.
LineNumberTable
A PC -> linenumber map (optional).
LocalVariableTable
Holds the programmer assigned names for variables (optional).
An attribute container contains exactly one attribute.
The actual attribute is stored in the contents array
There is no generic way to interprete
an attribute, so libjclass does not extract attributes automatically.
Use jclass_attribute_container_has_attribute()
to detect the type of attribute contained and then the appropriate
jclass_X_attribute_new function to extract the attribute.
@name_index:
@length:
@contents:
Information about an inner class in the innerclass attribute.
@type_index:
@outer_class_type_index:
@name_index:
@access_flags:
Holds information about inner classes.
@no_innerclasses:
@classes:
Exceptions attribute for classes and methods. It contains information
about exceptions thrown only (not for exceptions caught).
@no_exceptions:
@exception_index:
Attribute for the name of the source file used to compile the class.
@filename_index:
Attribute for the value of a constant.
@cp_index:
An entry in the exception table.
@start_pc:
@end_pc:
@handler_pc:
@catch_type:
Holds the code for each method.
The internal name for this attribute is "Code"
@max_stack:
@max_locals:
@code_length:
@code:
@exception_table_length:
@exception_table:
@attributes_count:
@attributes:
Line number information.
@start_pc:
@line_number:
Holds line number information for debugging.
The internal name of this attribute is "LineNumberTable"
It can only appear inside the Code attribute.
@length:
@line_number:
An entry in the local variable table.
@start_pc:
@length:
@name_index:
@descriptor_index:
@index:
Holds local variable information for debugging.
The internal name for this attribute is "LocalVariableTable"
It can only appear inside the Code attribute.
@length:
@localvariable:
@container:
@attribute_name:
@cpool:
@Returns:
@container:
@Returns:
@attribute:
@container:
@Returns:
@attribute:
@container:
@Returns:
@attribute:
@container:
@Returns:
@attribute:
@container:
@Returns:
@attribute:
@container:
@Returns:
@attribute:
@container:
@Returns:
@attribute: