org.objectweb.asm.attrs (ASM Documentation)

Package org.objectweb.asm.attrs

Provides an implementation for various optional class, field, method and bytecode attributes.

Class Summary
Annotation	Annotation data contains an annotated type and its array of the element-value pairs.
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.
Annotation.EnumConstValue	Container class used to store enum_const_value structure.
Attributes	Provides static utility methods for attributes.
EnclosingMethodAttribute	The EnclosingMethod attribute is an optional fixed-length attribute in the attributes table of the ClassFile structure.
LocalVariableType	Container type info used by LocalVariableTypeTableAttribute.
LocalVariableTypeTableAttribute	The LocalVariableTypeTable attribute is an optional variable-length attribute of a Code attribute.
RuntimeInvisibleAnnotations	The RuntimeInvisibleAnnotations attribute is similar to the RuntimeVisibleAnnotations attribute, except that the annotations represented by a RuntimeInvisibleAnnotations attribute must not be made available for return by reflective APIs, unless the JVM has been instructed to retain these annotations via some implementation-specific mechanism such as a command line flag.
RuntimeInvisibleParameterAnnotations	The RuntimeInvisibleParameterAnnotations attribute is similar to the RuntimeVisibleParameterAnnotations attribute, except that the annotations represented by a RuntimeInvisibleParameterAnnotations attribute must not be made available for return by reflective APIs, unless the JVM has specifically been instructed to retain these annotations via some implementation-specific mechanism such as a command line flag.
RuntimeVisibleAnnotations	The RuntimeVisibleAnnotations attribute is a variable length attribute in the attributes table of the ClassFile, field_info, and method_info structures.
RuntimeVisibleParameterAnnotations	The RuntimeVisibleParameterAnnotations attribute is a variable length attribute in the attributes table of the method_info structure.
SignatureAttribute	The Signature Attribute introduced in JSR-14 (Adding Generics to the Java Programming Language) and also defined in the Java Virtual Machine Specification, 3rd edition draft.
SourceDebugExtensionAttribute	The SourceDebugExtension attribute is an optional attribute defined in JSR-045 in the attributes table of the ClassFile structure.
StackMapAttribute	StackMapAttribute is used by CDLC preverifier and also by javac compiller starting from J2SE 1.5.
StackMapFrame	StackMapFrame is used by StackMapAttribute to hold state of the stack and local variables for a single execution branch.
StackMapType	Verification type info used by StackMapAttribute.

Class Summary

Annotation data contains an annotated type and its array of the element-value pairs.

The AnnotationDefault attribute is a variable length attribute in the attributes table of certain method_info structures, namely those representing elements of annotation types.

Annotation.EnumConstValue

Container class used to store enum_const_value structure.

Attributes

Provides static utility methods for attributes.

EnclosingMethodAttribute

The EnclosingMethod attribute is an optional fixed-length attribute in the attributes table of the ClassFile structure.

LocalVariableType

Container type info used by LocalVariableTypeTableAttribute.

LocalVariableTypeTableAttribute

The LocalVariableTypeTable attribute is an optional variable-length attribute of a Code attribute.

RuntimeInvisibleAnnotations

The RuntimeInvisibleAnnotations attribute is similar to the RuntimeVisibleAnnotations attribute, except that the annotations represented by a RuntimeInvisibleAnnotations attribute must not be made available for return by reflective APIs, unless the JVM has been instructed to retain these annotations via some implementation-specific mechanism such as a command line flag.

RuntimeInvisibleParameterAnnotations

The RuntimeInvisibleParameterAnnotations attribute is similar to the RuntimeVisibleParameterAnnotations attribute, except that the annotations represented by a RuntimeInvisibleParameterAnnotations attribute must not be made available for return by reflective APIs, unless the JVM has specifically been instructed to retain these annotations via some implementation-specific mechanism such as a command line flag.

RuntimeVisibleAnnotations

The RuntimeVisibleAnnotations attribute is a variable length attribute in the attributes table of the ClassFile, field_info, and method_info structures.

RuntimeVisibleParameterAnnotations

The RuntimeVisibleParameterAnnotations attribute is a variable length attribute in the attributes table of the method_info structure.

SignatureAttribute

The Signature Attribute introduced in JSR-14 (Adding Generics to the Java Programming Language) and also defined in the Java Virtual Machine Specification, 3rd edition draft.

SourceDebugExtensionAttribute

The SourceDebugExtension attribute is an optional attribute defined in JSR-045 in the attributes table of the ClassFile structure.

StackMapAttribute

StackMapAttribute is used by CDLC preverifier and also by javac compiller starting from J2SE 1.5.

StackMapFrame

StackMapFrame is used by StackMapAttribute to hold state of the stack and local variables for a single execution branch.

StackMapType

Verification type info used by StackMapAttribute.

Package org.objectweb.asm.attrs Description:

Provides an implementation for various optional class, field, method and bytecode attributes.

Signature used for Java generics (JSR-14)
SourceDebugExtension used for non Java source debugging (JSR-45)
StackMap (used for two phase bytecode verifier from CLDC 1.1 and J2SE 1.5 (JSR-30, JSR-139, JSR-202)
Several attibutes used for annotations (JSR-175)

By default ASM strips optional attributes, in order to keep them in the bytecode that is being readed should pass an array of required attribute instances to (org.objectweb.asm.ClassVisitor, org.objectweb.asm.Attribute[], boolean) ClassReader.accept() method. In order to add custom attributes to the manually constructed bytecode concrete subclasses of the Attribute can be passed to the correspond visit methods of the ClassVisitor and CodeVisitor.

Since: ASM 1.4.1