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[]

Field Summary

Fields

Modifier and Type	Field and Description
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
static ObjectType	STRING
static ObjectType	STRINGBUFFER
static ObjectType	THROWABLE
static Type	UNKNOWN
static BasicType	VOID Predefined constants

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
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()
static java.lang.String	getSignature(java.lang.reflect.Method meth)
int	getSize()
byte	getType()
static Type	getType(java.lang.Class<?> cl) Convert runtime java.lang.Class to BCEL Type object.
static Type	getType(java.lang.String signature) Convert signature to a Type object.
static Type[]	getTypes(java.lang.Class<?>[] classes) Convert runtime java.lang.Class[] to BCEL Type objects.
int	hashCode()
Type	normalizeForStackOrLocal() boolean, short and char variable are considered as int in the stack or local variable area.
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

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

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

Returns:

hashcode of Type

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

Returns:

whether the Types are equal

getSignature

public java.lang.String getSignature()

Returns:

signature for given type.

getType

public byte getType()

Returns:

type as defined in Constants

normalizeForStackOrLocal

public Type normalizeForStackOrLocal()

boolean, short and char variable are considered as int in the stack or local variable area. Returns INT for BOOLEAN, SHORT or CHAR, otherwise returns the given type.

Since:

6.0

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 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

Throws:

java.lang.StringIndexOutOfBoundsException

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

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

getTypes

public static Type[] getTypes(java.lang.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 java.lang.String getSignature(java.lang.reflect.Method meth)