Package 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 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	Description
static final BasicType	BOOLEAN
static final BasicType	BYTE
static final BasicType	CHAR
static final ObjectType	CLASS
static final BasicType	DOUBLE
static final BasicType	FLOAT
static final BasicType	INT
static final BasicType	LONG
static final Type[]	NO_ARGS	Empty array.
static final ReferenceType	NULL
static final ObjectType	OBJECT
static final BasicType	SHORT
protected String	signature	Deprecated. (since 6.0) will be made private; do not access directly, use getter/setter
static final ObjectType	STRING
static final ObjectType	STRINGBUFFER
static final ObjectType	THROWABLE
protected byte	type	Deprecated. (since 6.0) will be made private; do not access directly, use getter/setter
static final Type	UNKNOWN
static final BasicType	VOID	Predefined constants

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Type(byte type, String signature)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
static Type[]	getArgumentTypes(String signature)	Convert arguments of a method (signature) to an array of Type objects.
String	getClassName()
static String	getMethodSignature(Type returnType, Type[] argTypes)	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<?> cls)	Convert runtime 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()
Type	normalizeForStackOrLocal()	boolean, short and char variable are considered as int in the stack or local variable area.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

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

Empty array.

NULL

public static final ReferenceType NULL

UNKNOWN

public static final Type UNKNOWN

type

@Deprecated
protected byte type

Deprecated.

(since 6.0) will be made private; do not access directly, use getter/setter

signature

@Deprecated
protected String signature

Deprecated.

(since 6.0) will be made private; do not access directly, use getter/setter

Constructor Details

Type

protected Type(byte type,
 String signature)

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 returnType,
 Type[] argTypes)

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

Parameters:

returnType - what the method returns

argTypes - 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 static String getSignature(Method meth)

getType

public static Type getType(Class<?> cls)

Convert runtime Class to BCEL Type object.

Parameters:

cls - Java class

Returns:

corresponding Type object

getType

public static 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

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

equals

public boolean equals(Object o)

Overrides:

equals in class Object

Returns:

whether the Types are equal

getClassName

public String getClassName()

getSignature

public String getSignature()

Returns:

signature for given type.

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

hashCode

public int hashCode()

Overrides:

hashCode in class Object

Returns:

hash code of Type

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

toString

public String toString()

Overrides:

toString in class Object

Returns:

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