Package javassist.bytecode

Class SignatureAttribute

java.lang.Object

javassist.bytecode.AttributeInfo

javassist.bytecode.SignatureAttribute

public class SignatureAttribute
extends AttributeInfo

Signature_attribute.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SignatureAttribute.ArrayType	Array types.
static class	SignatureAttribute.BaseType	Primitive types.
static class	SignatureAttribute.ClassSignature	Class signature.
static class	SignatureAttribute.ClassType	Class types.
static class	SignatureAttribute.MethodSignature	Method type signature.
static class	SignatureAttribute.NestedClassType	Nested class types.
static class	SignatureAttribute.ObjectType	Class types, array types, and type variables.
static class	SignatureAttribute.Type	Primitive types and object types.
static class	SignatureAttribute.TypeArgument	Type argument.
static class	SignatureAttribute.TypeParameter	Formal type parameters.
static class	SignatureAttribute.TypeVariable	Type variables.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	tag	The name of this attribute "Signature".

Constructor Summary

Constructors

Constructor	Description
SignatureAttribute(ConstPool cp, String signature)	Constructs a Signature attribute.

Method Summary

Modifier and Type	Method	Description
AttributeInfo	copy(ConstPool newCp, Map<String,String> classnames)	Makes a copy.
String	getSignature()	Returns the generic signature indicated by signature_index.
void	setSignature(String sig)	Sets signature_index to the index of the given generic signature, which is added to a constant pool.
static SignatureAttribute.ClassSignature	toClassSignature(String sig)	Parses the given signature string as a class signature.
static SignatureAttribute.ObjectType	toFieldSignature(String sig)	Parses the given signature string as a field type signature.
static SignatureAttribute.MethodSignature	toMethodSignature(String sig)	Parses the given signature string as a method type signature.
static SignatureAttribute.Type	toTypeSignature(String sig)	Parses the given signature string as a type signature.

Methods inherited from class javassist.bytecode.AttributeInfo

get, getConstPool, getName, length, set

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

tag

public static final String tag

The name of this attribute "Signature".

See Also:

• Constant Field Values

Constructor Details

SignatureAttribute

public SignatureAttribute(ConstPool cp,
 String signature)

Constructs a Signature attribute.

Parameters:

cp - a constant pool table.

signature - the signature represented by this attribute.

Method Details

getSignature

public String getSignature()

Returns the generic signature indicated by signature_index.

See Also:

• toClassSignature(String)
• toMethodSignature(String)
• toFieldSignature(String)

setSignature

public void setSignature(String sig)

Sets signature_index to the index of the given generic signature, which is added to a constant pool.

Parameters:

sig - new signature.

Since:

3.11

copy

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

Makes a copy. Class names are replaced according to the given Map object.

Overrides:

copy in class AttributeInfo

Parameters:

newCp - the constant pool table used by the new copy.

classnames - pairs of replaced and substituted class names.

toClassSignature

public static SignatureAttribute.ClassSignature toClassSignature(String sig)
                                                          throws BadBytecode

Parses the given signature string as a class signature.

Parameters:

sig - the signature obtained from the SignatureAttribute of a ClassFile.

Returns:

a tree-like data structure representing a class signature. It provides convenient accessor methods.

Throws:

BadBytecode - thrown when a syntactical error is found.

Since:

3.5

See Also:

• getSignature()

toMethodSignature

public static SignatureAttribute.MethodSignature toMethodSignature(String sig)
                                                            throws BadBytecode

Parses the given signature string as a method type signature.

Parameters:

sig - the signature obtained from the SignatureAttribute of a MethodInfo.

Returns:

Throws:

BadBytecode - thrown when a syntactical error is found.

Since:

3.5

See Also:

• getSignature()

toFieldSignature

public static SignatureAttribute.ObjectType toFieldSignature(String sig)
                                                      throws BadBytecode

Parses the given signature string as a field type signature.

Parameters:

sig - the signature string obtained from the SignatureAttribute of a FieldInfo.

Returns:

the field type signature.

Throws:

BadBytecode - thrown when a syntactical error is found.

Since:

3.5

See Also:

• getSignature()

toTypeSignature

public static SignatureAttribute.Type toTypeSignature(String sig)
                                               throws BadBytecode

Parses the given signature string as a type signature. The type signature is either the field type signature or a base type descriptor including void type.

Throws:

BadBytecode - thrown when a syntactical error is found.

Since:

3.18