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.
private static class	SignatureAttribute.Cursor
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".

Fields inherited from class javassist.bytecode.AttributeInfo

constPool, info, name

Constructor Summary

Constructors

Constructor	Description
SignatureAttribute(ConstPool cp, int n, DataInputStream in)
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.
private static BadBytecode	error(String sig)
String	getSignature()	Returns the generic signature indicated by signature_index.
private static boolean	isNamePart(int c)
private static boolean	makeNewClassName(String desc, Map<String,String> map, String name, String newname, StringBuilder newdesc, int head, int j, ArrayList<StringBuilder> nameBufs, ArrayList<StringBuilder> genericParamBufs)
private static SignatureAttribute.ObjectType	parseArray(String sig, SignatureAttribute.Cursor c)
private static int	parseClassName(ArrayList<StringBuilder> nameBufs, ArrayList<StringBuilder> genericParamBufs, String desc, int j)
private static SignatureAttribute.ClassType	parseClassType(String sig, SignatureAttribute.Cursor c)
private static SignatureAttribute.ClassType	parseClassType2(String sig, SignatureAttribute.Cursor c, SignatureAttribute.ClassType parent)
private static SignatureAttribute.MethodSignature	parseMethodSig(String sig)
private static SignatureAttribute.ObjectType	parseObjectType(String sig, SignatureAttribute.Cursor c, boolean dontThrow)
private static SignatureAttribute.ClassSignature	parseSig(String sig)
private static SignatureAttribute.Type	parseType(String sig, SignatureAttribute.Cursor c)
private static SignatureAttribute.TypeArgument[]	parseTypeArgs(String sig, SignatureAttribute.Cursor c)
private static SignatureAttribute.TypeParameter[]	parseTypeParams(String sig, SignatureAttribute.Cursor cur)
(package private) void	renameClass(String oldname, String newname)
(package private) static String	renameClass(String desc, String oldname, String newname)
(package private) static String	renameClass(String desc, Map<String,String> map)
(package private) void	renameClass(Map<String,String> classnames)
private static boolean	replaceTypeArguments(String desc, Map<String,String> map, StringBuilder newdesc, int head, int j, ArrayList<StringBuilder> nameBufs, ArrayList<StringBuilder> genericParamBufs)
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

copyAll, get, getConstPool, getLength, getName, getRefClasses, getRefClasses, length, lookup, read, remove, renameClass, renameClass, set, write, writeAll

Methods inherited from class java.lang.Object

clone, equals, finalize, 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

SignatureAttribute(ConstPool cp,
 int n,
 DataInputStream in)
            throws IOException

Throws:

IOException

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.

renameClass

void renameClass(String oldname,
 String newname)

Overrides:

renameClass in class AttributeInfo

renameClass

void renameClass(Map<String,String> classnames)

Overrides:

renameClass in class AttributeInfo

renameClass

static String renameClass(String desc,
 String oldname,
 String newname)

renameClass

static String renameClass(String desc,
 Map<String,String> map)

parseClassName

private static int parseClassName(ArrayList<StringBuilder> nameBufs,
 ArrayList<StringBuilder> genericParamBufs,
 String desc,
 int j)

makeNewClassName

private static boolean makeNewClassName(String desc,
 Map<String,String> map,
 String name,
 String newname,
 StringBuilder newdesc,
 int head,
 int j,
 ArrayList<StringBuilder> nameBufs,
 ArrayList<StringBuilder> genericParamBufs)

replaceTypeArguments

private static boolean replaceTypeArguments(String desc,
 Map<String,String> map,
 StringBuilder newdesc,
 int head,
 int j,
 ArrayList<StringBuilder> nameBufs,
 ArrayList<StringBuilder> genericParamBufs)

isNamePart

private static boolean isNamePart(int c)

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

parseSig

private static SignatureAttribute.ClassSignature parseSig(String sig)
                                                   throws BadBytecode,
IndexOutOfBoundsException

Throws:

BadBytecode

IndexOutOfBoundsException

parseMethodSig

private static SignatureAttribute.MethodSignature parseMethodSig(String sig)
                                                          throws BadBytecode

Throws:

BadBytecode

parseTypeParams

private static SignatureAttribute.TypeParameter[] parseTypeParams(String sig,
 SignatureAttribute.Cursor cur)
                                                           throws BadBytecode

Throws:

BadBytecode

parseObjectType

private static SignatureAttribute.ObjectType parseObjectType(String sig,
 SignatureAttribute.Cursor c,
 boolean dontThrow)
                                                      throws BadBytecode

Throws:

BadBytecode

parseClassType

private static SignatureAttribute.ClassType parseClassType(String sig,
 SignatureAttribute.Cursor c)
                                                    throws BadBytecode

Throws:

BadBytecode

parseClassType2

private static SignatureAttribute.ClassType parseClassType2(String sig,
 SignatureAttribute.Cursor c,
 SignatureAttribute.ClassType parent)
                                                     throws BadBytecode

Throws:

BadBytecode

parseTypeArgs

private static SignatureAttribute.TypeArgument[] parseTypeArgs(String sig,
 SignatureAttribute.Cursor c)
                                                        throws BadBytecode

Throws:

BadBytecode

parseArray

private static SignatureAttribute.ObjectType parseArray(String sig,
 SignatureAttribute.Cursor c)
                                                 throws BadBytecode

Throws:

BadBytecode

parseType

private static SignatureAttribute.Type parseType(String sig,
 SignatureAttribute.Cursor c)
                                          throws BadBytecode

Throws:

BadBytecode

error

private static BadBytecode error(String sig)