Package aQute.bnd.compatibility

Class Signatures

java.lang.Object

aQute.bnd.compatibility.Signatures

public class Signatures
extends java.lang.Object

This class is compiled against 1.5 or later to provide access to the generic signatures. It can convert a Class, Field, Method or constructor to a generic signature and it can normalize a signature. Both are methods. Normalized signatures can be string compared and match even if the type variable names differ. @version $Id: cf12175aae65bac45771d15b455807c13d2f486e $

Constructor Summary

Constructors

Constructor	Description
Signatures()

Method Summary

Modifier and Type	Method	Description
java.lang.String	getSignature(java.lang.Class<?> c)	Calculate the generic signature of a Class.
java.lang.String	getSignature(java.lang.Object c)	Calculate the generic signature of a Class,Method,Field, or Constructor.
java.lang.String	getSignature(java.lang.reflect.Constructor<?> c)	Calculate the generic signature of a Constructor.
java.lang.String	getSignature(java.lang.reflect.Field f)	Calculate the generic signature of a Field.
java.lang.String	getSignature(java.lang.reflect.Method m)	Calculate the generic signature of a Method.
boolean	hasGenerics()	Check if the environment has generics, i.e.
java.lang.String	normalize(java.lang.String signature)	Normalize a signature to make sure the name of the variables are always the same.

Methods inherited from class java.lang.Object

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

Constructor Detail

Signatures

public Signatures()

Method Detail

hasGenerics

public boolean hasGenerics()
                    throws java.lang.Exception

Check if the environment has generics, i.e. later than Java 5 VM.

Returns:

true if generics are supported

Throws:

java.lang.Exception

getSignature

public java.lang.String getSignature(java.lang.Object c)
                              throws java.lang.Exception

Calculate the generic signature of a Class,Method,Field, or Constructor.

Throws:

java.lang.Exception

getSignature

public java.lang.String getSignature(java.lang.Class<?> c)
                              throws java.lang.Exception

Calculate the generic signature of a Class. A Class consists of:

 class ::= declaration? reference reference*
 

Throws:

java.lang.Exception

getSignature

public java.lang.String getSignature(java.lang.reflect.Method m)
                              throws java.lang.Exception

Calculate the generic signature of a Method. A Method consists of:

 method ::= declaration? '(' reference* ')' reference
 

Throws:

java.lang.Exception

getSignature

public java.lang.String getSignature(java.lang.reflect.Constructor<?> c)
                              throws java.lang.Exception

Calculate the generic signature of a Constructor. A Constructor consists of:

  constructor ::= declaration? '(' reference* ')V'
 

Parameters:

c -

Throws:

java.lang.Exception

getSignature

public java.lang.String getSignature(java.lang.reflect.Field f)
                              throws java.lang.Exception

Calculate the generic signature of a Field. A Field consists of:

 constructor ::= reference
 

Throws:

java.lang.Exception

normalize

public java.lang.String normalize(java.lang.String signature)

Normalize a signature to make sure the name of the variables are always the same. We change the names of the type variables to _n, where n is an integer. n is incremented for every new name and already used names are replaced with the _n name.

Returns:

a normalized signature