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java.lang.Objectjavassist.bytecode.AttributeInfo
javassist.bytecode.AnnotationDefaultAttribute
public class AnnotationDefaultAttribute
A class representing AnnotationDefault_attribute
.
For example, if you declare the following annotation type:
@interface Author { String name() default "Shakespeare"; int age() default 99; }
The defautl values of name
and age
are stored as annotation default attributes in Author.class
.
The following code snippet obtains the default value of name
:
ClassPool pool = ... CtClass cc = pool.get("Author"); CtMethod cm = cc.getDeclaredMethod("age"); MethodInfo minfo = cm.getMethodInfo(); AnnotationDefaultAttribute ada = (AnnotationDefaultAttribute) minfo.getAttribute(AnnotationDefaultAttribute.tag); MemberValue value = ada.getDefaultValue()); // default value of age
If the following statement is executed after the code above, the default value of age is set to 80:
ada.setDefaultValue(new IntegerMemberValue(minfo.getConstPool(), 80));
AnnotationsAttribute
,
MemberValue
Field Summary | |
---|---|
static java.lang.String |
tag
The name of the AnnotationDefault attribute. |
Fields inherited from class javassist.bytecode.AttributeInfo |
---|
constPool |
Constructor Summary | |
---|---|
AnnotationDefaultAttribute(ConstPool cp)
Constructs an empty AnnotationDefault_attribute . |
|
AnnotationDefaultAttribute(ConstPool cp,
byte[] info)
Constructs an AnnotationDefault_attribute . |
Method Summary | |
---|---|
AttributeInfo |
copy(ConstPool newCp,
java.util.Map classnames)
Copies this attribute and returns a new copy. |
MemberValue |
getDefaultValue()
Obtains the default value represented by this attribute. |
void |
setDefaultValue(MemberValue value)
Changes the default value represented by this attribute. |
java.lang.String |
toString()
Returns a string representation of this object. |
Methods inherited from class javassist.bytecode.AttributeInfo |
---|
get, getConstPool, getName, length, set |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
public static final java.lang.String tag
AnnotationDefault
attribute.
Constructor Detail |
---|
public AnnotationDefaultAttribute(ConstPool cp, byte[] info)
AnnotationDefault_attribute
.
cp
- constant poolinfo
- the contents of this attribute. It does not
include attribute_name_index
or
attribute_length
.public AnnotationDefaultAttribute(ConstPool cp)
AnnotationDefault_attribute
.
The default value can be set by setDefaultValue()
.
cp
- constant poolsetDefaultValue(javassist.bytecode.annotation.MemberValue)
Method Detail |
---|
public AttributeInfo copy(ConstPool newCp, java.util.Map classnames)
copy
in class AttributeInfo
newCp
- the constant pool table used by the new copy.classnames
- pairs of replaced and substituted
class names.public MemberValue getDefaultValue()
public void setDefaultValue(MemberValue value)
value
- the new value.Annotation.createMemberValue(ConstPool, CtClass)
public java.lang.String toString()
toString
in class java.lang.Object
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