Top Description Fields Constructors Methods
javassist.bytecode

public Class AnnotationDefaultAttribute

extends AttributeInfo
Class Inheritance
Imports
java.io.ByteArrayOutputStream, .DataInputStream, .IOException, java.util.Map, javassist.CtClass, javassist.bytecode.annotation.AnnotationsWriter, .MemberValue
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));
See Also
AnnotationsAttribute, javassist.bytecode.annotation.MemberValue

Field Summary

Modifier and TypeField and Description
public static final String
tag

The name of the AnnotationDefault attribute.

Inherited from javassist.bytecode.AttributeInfo:
constPoolinfoname

Constructor Summary

AccessConstructor and Description
public
AnnotationDefaultAttribute(ConstPool
constant pool
cp, byte[]
the contents of this attribute. It does not include attribute_name_index or attribute_length.
info)

Constructs an AnnotationDefault_attribute.

public
AnnotationDefaultAttribute(ConstPool
constant pool
cp)

Constructs an empty AnnotationDefault_attribute.

pack-priv
AnnotationDefaultAttribute(ConstPool cp, int
the attribute name.
n, DataInputStream in)

Method Summary

Modifier and TypeMethod and Description
public AttributeInfo
copy(ConstPool
the constant pool table used by the new copy.
newCp, Map<String, String>
pairs of replaced and substituted class names.
classnames)

Overrides javassist.bytecode.AttributeInfo.copy.

Copies this attribute and returns a new copy.

public MemberValue
getDefaultValue()

Obtains the default value represented by this attribute.

pack-priv void
renameClass(String oldname, String newname)

Overrides javassist.bytecode.AttributeInfo.renameClass.

pack-priv void
renameClass(Map<String, String> classnames)

Overrides javassist.bytecode.AttributeInfo.renameClass.

public void
setDefaultValue(MemberValue
the new value.
value)

Changes the default value represented by this attribute.

public String
toString()

Overrides java.lang.Object.toString.

Returns a string representation of this object.

Inherited from javassist.bytecode.AttributeInfo:
copyAllgetgetConstPoolgetLengthgetNamegetRefClassesgetRefClasseslengthlookupreadremoverenameClassrenameClasssetwritewriteAll

Field Detail

tagback to summary
public static final String tag

The name of the AnnotationDefault attribute.

Constructor Detail

AnnotationDefaultAttributeback to summary
public AnnotationDefaultAttribute(ConstPool cp, byte[] info)

Constructs an AnnotationDefault_attribute.

Parameters
cp:ConstPool

constant pool

info:byte[]

the contents of this attribute. It does not include attribute_name_index or attribute_length.

AnnotationDefaultAttributeback to summary
public AnnotationDefaultAttribute(ConstPool cp)

Constructs an empty AnnotationDefault_attribute. The default value can be set by setDefaultValue().

Parameters
cp:ConstPool

constant pool

See Also
setDefaultValue(javassist.bytecode.annotation.MemberValue)
AnnotationDefaultAttributeback to summary
pack-priv AnnotationDefaultAttribute(ConstPool cp, int n, DataInputStream in) throws IOException
Parameters
n:int

the attribute name.

Method Detail

copyback to summary
public AttributeInfo copy(ConstPool newCp, Map<String, String> classnames)

Overrides javassist.bytecode.AttributeInfo.copy.

Copies this attribute and returns a new copy.

Parameters
newCp:ConstPool

Doc from javassist.bytecode.AttributeInfo.copy.

the constant pool table used by the new copy.

classnames:Map<String, String>

Doc from javassist.bytecode.AttributeInfo.copy.

pairs of replaced and substituted class names.

Annotations
@Override
getDefaultValueback to summary
public MemberValue getDefaultValue()

Obtains the default value represented by this attribute.

renameClassback to summary
pack-priv void renameClass(String oldname, String newname)

Overrides javassist.bytecode.AttributeInfo.renameClass.

Annotations
@Override
renameClassback to summary
pack-priv void renameClass(Map<String, String> classnames)

Overrides javassist.bytecode.AttributeInfo.renameClass.

Annotations
@Override
setDefaultValueback to summary
public void setDefaultValue(MemberValue value)

Changes the default value represented by this attribute.

Parameters
value:MemberValue

the new value.

See Also
javassist.bytecode.annotation.Annotation#createMemberValue(ConstPool, CtClass)
toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Returns a string representation of this object.

Returns:String

Doc from java.lang.Object.toString.

a string representation of the object

Annotations
@Override