org.apache.bcel.generic
Class Type

java.lang.Object
  org.apache.bcel.generic.Type

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BasicType, DOUBLE_Upper, LONG_Upper, ReferenceType, ReturnaddressType

public abstract class Type
extends Object
implements 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 393344 2006-04-12 00:38:34Z tcurdt $

See Also:

Serialized Form

Field Summary

static BasicType	BOOLEAN
static BasicType	BYTE
static BasicType	CHAR
static ObjectType	CLASS
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 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, String s)

Method Summary

boolean	equals(Object o)
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(Method meth)
int	getSize()
byte	getType()
static Type	getType(Class cl) Convert runtime java.lang.Class to BCEL Type object.
static Type	getType(String signature) Convert signature to a Type object.
static Type[]	getTypes(Class[] classes) Convert runtime java.lang.Class[] to BCEL Type objects.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

type

protected byte type

signature

protected 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

CLASS

public static final ObjectType CLASS

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,
               String s)

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

Returns:

hashcode of Type

equals

public boolean equals(Object o)

Overrides:

equals in class Object

Returns:

whether the Types are equal

getSignature

public 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 String toString()

Overrides:

toString in class Object

Returns:

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

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).

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

Throws:

StringIndexOutOfBoundsException

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

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

getType

public static Type getType(Class cl)

Convert runtime java.lang.Class to BCEL Type object.

Parameters:

cl - Java class

Returns:

corresponding Type object

getTypes

public static Type[] getTypes(Class[] classes)

Convert runtime java.lang.Class[] to BCEL Type objects.

Parameters:

classes - an array of runtime class objects

Returns:

array of corresponding Type objects

getSignature

public static String getSignature(Method meth)