org.objectweb.asm.attrs
Class RuntimeVisibleParameterAnnotations
java.lang.Object
org.objectweb.asm.Attribute
org.objectweb.asm.attrs.RuntimeVisibleParameterAnnotations
- Direct Known Subclasses:
- ASMRuntimeVisibleParameterAnnotations
public class RuntimeVisibleParameterAnnotations
- extends Attribute
The RuntimeVisibleParameterAnnotations attribute is a variable length attribute
in the attributes table of the method_info structure. The
RuntimeVisibleParameterAnnotations attribute records runtime-visible Java
programming language annotations on the parameters of the corresponding method.
Each method_info structure may contain at most one
RuntimeVisibleParameterAnnotations attribute, which records all the
runtime-visible Java programming language annotations on the parameters of the
corresponding method. The JVM must make these annotations available so they can
be returned by the appropriate reflective APIs.
The RuntimeVisibleParameterAnnotations attribute has the following format:
RuntimeVisibleParameterAnnotations_attribute {
u2 attribute_name_index;
u4 attribute_length;
u1 num_parameters;
{
u2 num_annotations;
annotation annotations[num_annotations];
} parameter_annotations[num_parameters];
}
The items of the RuntimeVisibleParameterAnnotations 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
"RuntimeVisibleParameterAnnotations".
- 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 number of parameters, the number of runtime-visible
annotations on each parameter, and their values.
- num_parameters
- The value of the num_parameters item gives the number of parameters of the
method represented by the method_info structure on which the annotation
occurs. (This duplicates information that could be extracted from the method
descriptor.)
- parameter_annotations
- Each value of the parameter_annotations table represents all of the
runtime-visible annotations on a single parameter. The sequence of values in
the table corresponds to the sequence of parameters in the method signature.
Each parameter_annotations entry contains the following two items:
- num_annotations
- The value of the num_annotations item indicates the number of runtime-visible
annotations on the parameter corresponding to the sequence number of this
parameter_annotations element.
- annotations
- Each value of the annotations table represents a single runtime-visible
annotation
on the parameter
corresponding to the sequence number of this parameter_annotations element.
- Author:
- Eugene Kuleshov
- See Also:
- JSR 175 : A Metadata
Facility for the Java Programming Language
Field Summary |
List |
parameters
List of List s that
contains Annotation for each method parameter. |
parameters
public List parameters
List
of List
s that
contains Annotation
for each method parameter.
RuntimeVisibleParameterAnnotations
public RuntimeVisibleParameterAnnotations()
read
protected Attribute read(ClassReader cr,
int off,
int len,
char[] buf,
int codeOff,
Label[] labels)
- Description copied from class:
Attribute
- Reads a
type
attribute. This method must return a new
Attribute
object, of type type
, corresponding to the
len bytes starting at the given offset, in the given class reader.
- Overrides:
read
in class Attribute
- Parameters:
cr
- the class that contains the attribute to be read.off
- index of the first byte of the attribute's content in cr.b
. The 6 attribute header bytes, containing the type
and the length of the attribute, are not taken into account here.len
- the length of the attribute's content.buf
- buffer to be used to call readUTF8
,
readClass
or readConst
.codeOff
- index of the first byte of code's attribute content in
cr.b
, or -1 if the attribute to be read is not a
code attribute. The 6 attribute header bytes, containing the type and
the length of the attribute, are not taken into account here.labels
- the labels of the method's code, or null if the
attribute to be read is not a code attribute.
- Returns:
- a new
Attribute
object corresponding to the given
bytes.
write
protected ByteVector write(ClassWriter cw,
byte[] code,
int len,
int maxStack,
int maxLocals)
- Description copied from class:
Attribute
- Returns the byte array form of this attribute.
- Overrides:
write
in class Attribute
- Parameters:
cw
- the class to which this attribute must be added. This parameter
can be used to add to the constant pool of this class the items that
corresponds to this attribute.code
- the bytecode of the method corresponding to this code
attribute, or null if this attribute is not a code
attributes.len
- the length of the bytecode of the method corresponding to this
code attribute, or null if this attribute is not a code
attribute.maxStack
- the maximum stack size of the method corresponding to this
code attribute, or -1 if this attribute is not a code attribute.maxLocals
- the maximum number of local variables of the method
corresponding to this code attribute, or -1 if this attribute is not
a code attribute.
- Returns:
- the byte array form of this attribute.
toString
public String toString()
- Overrides:
toString
in class Object