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bcel API: Class Type
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org.apache.bcel.generic
Class Type

java.lang.Object
  |
  +--org.apache.bcel.generic.Type
Direct Known Subclasses:
BasicType, DOUBLE_Upper, LONG_Upper, ReferenceType, ReturnaddressType
public abstract class Type
extends java.lang.Object

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 1.1.1.1 2001/10/29 20:00:28 jvanzyl Exp $
Author:
M. Dahm

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
           
protected  java.lang.String signature
           
static ObjectType STRING
           
static ObjectType STRINGBUFFER
           
static ObjectType THROWABLE
           
protected  byte type
           
static Type UNKNOWN
           
static BasicType VOID
          Predefined constants
 
Constructor Summary
protected Type(byte t, java.lang.String s)
           
 
Method Summary
static Type[] getArgumentTypes(java.lang.String signature)
          Convert arguments of a method (signature) to an array of Type objects.
static java.lang.String getMethodSignature(Type return_type, Type[] arg_types)
          Convert type to Java method signature, e.g.
static Type getReturnType(java.lang.String signature)
          Convert return value of a method (signature) to a Type object.
 java.lang.String getSignature()
           
 int getSize()
           
 byte getType()
           
static Type getType(java.lang.String signature)
          Convert signature to a Type object.
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

type

protected byte type

signature

protected java.lang.String signature

VOID

public static final BasicType VOID
Predefined constants

BOOLEAN

public static final BasicType BOOLEAN

INT

public static final BasicType INT

SHORT

public static final BasicType SHORT

BYTE

public static final BasicType BYTE

LONG

public static final BasicType LONG

DOUBLE

public static final BasicType DOUBLE

FLOAT

public static final BasicType FLOAT

CHAR

public static final BasicType CHAR

OBJECT

public static final ObjectType OBJECT

STRING

public static final ObjectType STRING

STRINGBUFFER

public static final ObjectType STRINGBUFFER

THROWABLE

public static final ObjectType THROWABLE

NO_ARGS

public static final Type[] NO_ARGS

NULL

public static final ReferenceType NULL

UNKNOWN

public static final Type UNKNOWN
Constructor Detail

Type

protected Type(byte t,
               java.lang.String s)
Method Detail

getSignature

public java.lang.String getSignature()
Returns:
signature for given type.

getType

public byte getType()
Returns:
type as defined in Constants

getSize

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

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object
Returns:
Type string, e.g. `int[]'

getMethodSignature

public static java.lang.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).

getType

public static final Type getType(java.lang.String signature)
                          throws java.lang.StringIndexOutOfBoundsException
Convert signature to a Type object.
Parameters:
signature - signature string such as Ljava/lang/String;
Returns:
type object

getReturnType

public static Type getReturnType(java.lang.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

getArgumentTypes

public static Type[] getArgumentTypes(java.lang.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
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