AnnotationDefaultAttributepublic class AnnotationDefaultAttribute extends Attribute | 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
{@link oracle.toplink.libraries.asm.attrs.AnnotationElementValue element} whose default
value is represented by this AnnotationDefault attribute.
|
| Fields Summary |
|---|
| public Object | defaultValueDefault value for annotation. Could be one of
Byte, Character, Double,
Float, Integer, Long, Short,
Boolean, String,
Annotation.EnumConstValue, Type,
Annotation or Object[]. |
| Constructors Summary |
|---|
public AnnotationDefaultAttribute()
super("AnnotationDefault");
| public AnnotationDefaultAttribute(Object defaultValue)
this();
this.defaultValue = defaultValue;
|
| Methods Summary |
|---|
| protected oracle.toplink.libraries.asm.Attribute | read(oracle.toplink.libraries.asm.ClassReader cr, int off, int len, char[] buf, int codeOff, oracle.toplink.libraries.asm.Label[] labels)
return new AnnotationDefaultAttribute( Annotation.readValue(cr, new int[] {off}, buf));
| | public java.lang.String | toString()Returns value in the format described in JSR-175 for Java source code.
return "default " + defaultValue;
| | protected oracle.toplink.libraries.asm.ByteVector | write(oracle.toplink.libraries.asm.ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals)
return Annotation.writeValue( new ByteVector(), defaultValue, cw);
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