org.metasyntactic.utilities
Class Signature

java.lang.Object
  |
  +--org.metasyntactic.utilities.Signature

public class Signature

extends java.lang.Object

A signature is a string representing a type of a method, field or array. The field signature represents the value of an argument to a function or the value of a variable. It is a series of bytes generated by the following grammar:

  ::= 
       ::= ||
        ::= B|C|D|F|I|J|S|Z
      ::= L;
       ::= [
    ::= [0-9]*
 

The meaning of the base types is as follows:

• B byte
• C char
• D double
• F float
• I int
• J long
• L; class
• S short
• Z boolean
• [ array

A return-type signature represents the return value from a method. It is a series of bytes in the following grammar:

  ::=  | V
 

The character V indicates that the method returns no value. Otherwise, the signature indicates the type of the return value.

An argument signature represents an argument passed to a method:

  ::= 
 

A method signature represents the arguments that the method expects, and the value that it returns.

     ::= () 
  ::= *
 

Field Summary

static java.lang.String	BOOLEAN_SIGNATURE
static java.lang.String	BYTE_SIGNATURE
static java.lang.String	CHAR_SIGNATURE
static java.lang.String	DOUBLE_SIGNATURE
static java.lang.String	FLOAT_SIGNATURE
static java.lang.String	INT_SIGNATURE
static java.lang.String	LONG_SIGNATURE
static java.lang.String	SHORT_SIGNATURE
static java.lang.String	VOID_SIGNATURE

Constructor Summary

Signature()

Method Summary

static java.lang.String	getSignature(java.lang.Class clazz) Returns the appropriate signature string for this class
static java.lang.String	getSignature(java.lang.reflect.Constructor cons)
static java.lang.String	getSignature(java.lang.reflect.Method method)
static void	main(java.lang.String[] args)
static java.lang.String	toString(java.lang.String sig) Converts a java VM signature into it's appropriate java code String.

Methods inherited from class java.lang.Object

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

Field Detail

BOOLEAN_SIGNATURE

public static final java.lang.String BOOLEAN_SIGNATURE

See Also:

Constant Field Values

BYTE_SIGNATURE

public static final java.lang.String BYTE_SIGNATURE

See Also:

Constant Field Values

SHORT_SIGNATURE

public static final java.lang.String SHORT_SIGNATURE

See Also:

Constant Field Values

CHAR_SIGNATURE

public static final java.lang.String CHAR_SIGNATURE

See Also:

Constant Field Values

INT_SIGNATURE

public static final java.lang.String INT_SIGNATURE

See Also:

Constant Field Values

LONG_SIGNATURE

public static final java.lang.String LONG_SIGNATURE

See Also:

Constant Field Values

FLOAT_SIGNATURE

public static final java.lang.String FLOAT_SIGNATURE

See Also:

Constant Field Values

DOUBLE_SIGNATURE

public static final java.lang.String DOUBLE_SIGNATURE

See Also:

Constant Field Values

VOID_SIGNATURE

public static final java.lang.String VOID_SIGNATURE

See Also:

Constant Field Values

Constructor Detail

Signature

public Signature()

Method Detail

getSignature

public static java.lang.String getSignature(java.lang.Class clazz)

Returns the appropriate signature string for this class

Returns:

The signature for this class

getSignature

public static java.lang.String getSignature(java.lang.reflect.Constructor cons)

getSignature

public static java.lang.String getSignature(java.lang.reflect.Method method)

toString

public static java.lang.String toString(java.lang.String sig)
                                 throws java.lang.IllegalArgumentException

Converts a java VM signature into it's appropriate java code String. Examples:

Parameters:

sig - The signature to convert to a java code snippet

Returns:

The java code version of this VM type signature

Throws:

java.lang.IllegalArgumentException - If the signature is not a valid VM type signature

main

public static void main(java.lang.String[] args)

Parameters:

args - the command line arguments