org.apache.bcel.generic

Class Type

Implemented Interfaces:
java.io.Serializable
Known Direct Subclasses:
BasicType, DOUBLE_Upper, LONG_Upper, ReferenceType, ReturnaddressType

public abstract class Type
extends java.lang.Object
implements java.io.Serializable

Abstract super class for all possible java types, namely basic types such as int, object types like String and array types, e.g. int[]

Version:
$Id: Type.java,v 1.8 2002/08/07 18:01:32 mdahm Exp $

Author:
M. Dahm

See Also:
Serialized Form

Field Summary

static BasicType
BOOLEAN
static BasicType
BYTE
static BasicType
CHAR
static BasicType
DOUBLE
static BasicType
FLOAT
static BasicType
INT
static BasicType
LONG
static Type[]
NO_ARGS
static ReferenceType
NULL
static ObjectType
OBJECT
static BasicType
SHORT
static ObjectType
STRING
static ObjectType
STRINGBUFFER
static ObjectType
THROWABLE
static Type
UNKNOWN
static BasicType
VOID
Predefined constants
protected String
signature
protected byte
type

Constructor Summary

Type(byte t, String s)

Method Summary

static Type[]
getArgumentTypes(String signature)
Convert arguments of a method (signature) to an array of Type objects.
static String
getMethodSignature(Type return_type, Type arg_types)
Convert type to Java method signature, e.g.
static Type
getReturnType(String signature)
Convert return value of a method (signature) to a Type object.
String
getSignature()
static String
getSignature(java.lang.reflect.Method meth)
int
getSize()
byte
getType()
static Type
getType(String signature)
Convert signature to a Type object.
static Type
getType(java.lang.Class cl)
Convert runtime java.lang.Class to BCEL Type object.
String
toString()

Field Details

BOOLEAN

public static final BasicType BOOLEAN


BYTE

public static final BasicType BYTE


CHAR

public static final BasicType CHAR


DOUBLE

public static final BasicType DOUBLE


FLOAT

public static final BasicType FLOAT


INT

public static final BasicType INT


LONG

public static final BasicType LONG


NO_ARGS

public static final Type[] NO_ARGS


NULL

public static final ReferenceType NULL


OBJECT

public static final ObjectType OBJECT


SHORT

public static final BasicType SHORT


STRING

public static final ObjectType STRING


STRINGBUFFER

public static final ObjectType STRINGBUFFER


THROWABLE

public static final ObjectType THROWABLE


UNKNOWN

public static final Type UNKNOWN


VOID

public static final BasicType VOID
Predefined constants


signature

protected String signature


type

protected byte type

Constructor Details

Type

protected Type(byte t,
               String s)

Method Details

getArgumentTypes

public static Type[] getArgumentTypes(String signature)
Convert arguments of a method (signature) to an array of Type objects.

Parameters:
signature - signature string such as (Ljava/lang/String;)V

Returns:
array of argument types


getMethodSignature

public static String getMethodSignature(Type return_type,
                                        Type arg_types)
Convert type to Java method signature, e.g. int[] f(java.lang.String x) becomes (Ljava/lang/String;)[I

Parameters:
return_type - what the method returns
arg_types - what are the argument types

Returns:
method signature for given type(s).


getReturnType

public static Type getReturnType(String signature)
Convert return value of a method (signature) to a Type object.

Parameters:
signature - signature string such as (Ljava/lang/String;)V

Returns:
return type


getSignature

public String getSignature()

Returns:
signature for given type.


getSignature

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


getSize

public int getSize()

Returns:
stack size of this type (2 for long and double, 0 for void, 1 otherwise)


getType

public byte getType()

Returns:
type as defined in Constants


getType

public static final Type getType(String signature)
            throws StringIndexOutOfBoundsException
Convert signature to a Type object.

Parameters:
signature - signature string such as Ljava/lang/String;

Returns:
type object


getType

public static Type getType(java.lang.Class cl)
Convert runtime java.lang.Class to BCEL Type object.

Parameters:
cl - Java class

Returns:
corresponding Type object


toString

public String toString()

Returns:
Type string, e.g. `int[]'