Package scala.tools.asm

Class Type

java.lang.Object

scala.tools.asm.Type

public class Type
extends java.lang.Object

A Java field or method type. This class can be used to make it easier to manipulate type and method descriptors.

Field Summary

Fields

Modifier and Type	Field	Description
static int	ARRAY	The sort of array reference types.
static int	BOOLEAN	The sort of the boolean type.
static Type	BOOLEAN_TYPE	The boolean type.
static int	BYTE	The sort of the byte type.
static Type	BYTE_TYPE	The byte type.
static int	CHAR	The sort of the char type.
static Type	CHAR_TYPE	The char type.
static int	DOUBLE	The sort of the double type.
static Type	DOUBLE_TYPE	The double type.
static int	FLOAT	The sort of the float type.
static Type	FLOAT_TYPE	The float type.
static int	INT	The sort of the int type.
static Type	INT_TYPE	The int type.
static int	LONG	The sort of the long type.
static Type	LONG_TYPE	The long type.
static int	METHOD	The sort of method types.
static int	OBJECT	The sort of object reference types.
static int	SHORT	The sort of the short type.
static Type	SHORT_TYPE	The short type.
static int	VOID	The sort of the void type.
static Type	VOID_TYPE	The void type.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object object)	Tests if the given object is equal to this type.
int	getArgumentsAndReturnSizes()	Returns the size of the arguments and of the return value of methods of this type.
static int	getArgumentsAndReturnSizes(java.lang.String methodDescriptor)	Computes the size of the arguments and of the return value of a method.
Type[]	getArgumentTypes()	Returns the argument types of methods of this type.
static Type[]	getArgumentTypes(java.lang.reflect.Method method)	Returns the Type values corresponding to the argument types of the given method.
static Type[]	getArgumentTypes(java.lang.String methodDescriptor)	Returns the Type values corresponding to the argument types of the given method descriptor.
java.lang.String	getClassName()	Returns the binary name of the class corresponding to this type.
static java.lang.String	getConstructorDescriptor(java.lang.reflect.Constructor<?> constructor)	Returns the descriptor corresponding to the given constructor.
java.lang.String	getDescriptor()	Returns the descriptor corresponding to this type.
static java.lang.String	getDescriptor(java.lang.Class<?> clazz)	Returns the descriptor corresponding to the given class.
int	getDimensions()	Returns the number of dimensions of this array type.
Type	getElementType()	Returns the type of the elements of this array type.
java.lang.String	getInternalName()	Returns the internal name of the class corresponding to this object or array type.
static java.lang.String	getInternalName(java.lang.Class<?> clazz)	Returns the internal name of the given class.
static java.lang.String	getMethodDescriptor(java.lang.reflect.Method method)	Returns the descriptor corresponding to the given method.
static java.lang.String	getMethodDescriptor(Type returnType, Type... argumentTypes)	Returns the descriptor corresponding to the given argument and return types.
static Type	getMethodType(java.lang.String methodDescriptor)	Returns the Type corresponding to the given method descriptor.
static Type	getMethodType(Type returnType, Type... argumentTypes)	Returns the method Type corresponding to the given argument and return types.
static Type	getObjectType(java.lang.String internalName)	Returns the Type corresponding to the given internal name.
int	getOpcode(int opcode)	Returns a JVM instruction opcode adapted to this Type.
Type	getReturnType()	Returns the return type of methods of this type.
static Type	getReturnType(java.lang.reflect.Method method)	Returns the Type corresponding to the return type of the given method.
static Type	getReturnType(java.lang.String methodDescriptor)	Returns the Type corresponding to the return type of the given method descriptor.
int	getSize()	Returns the size of values of this type.
int	getSort()	Returns the sort of this type.
static Type	getType(java.lang.Class<?> clazz)	Returns the Type corresponding to the given class.
static Type	getType(java.lang.reflect.Constructor<?> constructor)	Returns the method Type corresponding to the given constructor.
static Type	getType(java.lang.reflect.Method method)	Returns the method Type corresponding to the given method.
static Type	getType(java.lang.String typeDescriptor)	Returns the Type corresponding to the given type descriptor.
int	hashCode()	Returns a hash code value for this type.
java.lang.String	toString()	Returns a string representation of this type.

Methods inherited from class java.lang.Object

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

Field Detail

VOID

public static final int VOID

The sort of the void type. See getSort().

See Also:

Constant Field Values

BOOLEAN

public static final int BOOLEAN

The sort of the boolean type. See getSort().

See Also:

Constant Field Values

CHAR

public static final int CHAR

The sort of the char type. See getSort().

See Also:

Constant Field Values

BYTE

public static final int BYTE

The sort of the byte type. See getSort().

See Also:

Constant Field Values

SHORT

public static final int SHORT

The sort of the short type. See getSort().

See Also:

Constant Field Values

INT

public static final int INT

The sort of the int type. See getSort().

See Also:

Constant Field Values

FLOAT

public static final int FLOAT

The sort of the float type. See getSort().

See Also:

Constant Field Values

LONG

public static final int LONG

The sort of the long type. See getSort().

See Also:

Constant Field Values

DOUBLE

public static final int DOUBLE

The sort of the double type. See getSort().

See Also:

Constant Field Values

ARRAY

public static final int ARRAY

The sort of array reference types. See getSort().

See Also:

Constant Field Values

OBJECT

public static final int OBJECT

The sort of object reference types. See getSort().

See Also:

Constant Field Values

METHOD

public static final int METHOD

The sort of method types. See getSort().

See Also:

Constant Field Values

VOID_TYPE

public static final Type VOID_TYPE

The void type.

BOOLEAN_TYPE

public static final Type BOOLEAN_TYPE

The boolean type.

CHAR_TYPE

public static final Type CHAR_TYPE

The char type.

BYTE_TYPE

public static final Type BYTE_TYPE

The byte type.

SHORT_TYPE

public static final Type SHORT_TYPE

The short type.

INT_TYPE

public static final Type INT_TYPE

The int type.

FLOAT_TYPE

public static final Type FLOAT_TYPE

The float type.

LONG_TYPE

public static final Type LONG_TYPE

The long type.

DOUBLE_TYPE

public static final Type DOUBLE_TYPE

The double type.

Method Detail

getType

public static Type getType(java.lang.String typeDescriptor)

Returns the Type corresponding to the given type descriptor.

Parameters:

typeDescriptor - a field or method type descriptor.

Returns:

the Type corresponding to the given type descriptor.

getObjectType

public static Type getObjectType(java.lang.String internalName)

Returns the Type corresponding to the given internal name.

Parameters:

internalName - an internal name.

Returns:

the Type corresponding to the given internal name.

getMethodType

public static Type getMethodType(java.lang.String methodDescriptor)

Returns the Type corresponding to the given method descriptor. Equivalent to Type.getType(methodDescriptor).

Parameters:

methodDescriptor - a method descriptor.

Returns:

the Type corresponding to the given method descriptor.

getMethodType

public static Type getMethodType(Type returnType,
                                 Type... argumentTypes)

Returns the method Type corresponding to the given argument and return types.

Parameters:

returnType - the return type of the method.

argumentTypes - the argument types of the method.

Returns:

the method Type corresponding to the given argument and return types.

getType

public static Type getType(java.lang.Class<?> clazz)

Returns the Type corresponding to the given class.

Parameters:

clazz - a class.

Returns:

the Type corresponding to the given class.

getType

public static Type getType(java.lang.reflect.Constructor<?> constructor)

Returns the method Type corresponding to the given constructor.

Parameters:

constructor - a Constructor object.

Returns:

the method Type corresponding to the given constructor.

getType

public static Type getType(java.lang.reflect.Method method)

Returns the method Type corresponding to the given method.

Parameters:

method - a Method object.

Returns:

the method Type corresponding to the given method.

getArgumentTypes

public static Type[] getArgumentTypes(java.lang.String methodDescriptor)

Returns the Type values corresponding to the argument types of the given method descriptor.

Parameters:

methodDescriptor - a method descriptor.

Returns:

the Type values corresponding to the argument types of the given method descriptor.

getArgumentTypes

public static Type[] getArgumentTypes(java.lang.reflect.Method method)

Returns the Type values corresponding to the argument types of the given method.

Parameters:

method - a method.

Returns:

the Type values corresponding to the argument types of the given method.

getReturnType

public static Type getReturnType(java.lang.String methodDescriptor)

Returns the Type corresponding to the return type of the given method descriptor.

Parameters:

methodDescriptor - a method descriptor.

Returns:

the Type corresponding to the return type of the given method descriptor.

getReturnType

public static Type getReturnType(java.lang.reflect.Method method)

Returns the Type corresponding to the return type of the given method.

Parameters:

method - a method.

Returns:

the Type corresponding to the return type of the given method.

getArgumentsAndReturnSizes

public static int getArgumentsAndReturnSizes(java.lang.String methodDescriptor)

Computes the size of the arguments and of the return value of a method.

Parameters:

methodDescriptor - a method descriptor.

Returns:

the size of the arguments of the method (plus one for the implicit this argument), argumentsSize, and the size of its return value, returnSize, packed into a single int i = (argumentsSize << 2) | returnSize (argumentsSize is therefore equal to i >> 2, and returnSize to i & 0x03).

getSort

public int getSort()

Returns the sort of this type.

Returns:

VOID, BOOLEAN, CHAR, BYTE, SHORT, INT, FLOAT, LONG, DOUBLE, ARRAY, OBJECT or METHOD.

getDimensions

public int getDimensions()

Returns the number of dimensions of this array type. This method should only be used for an array type.

Returns:

the number of dimensions of this array type.

getElementType

public Type getElementType()

Returns the type of the elements of this array type. This method should only be used for an array type.

Returns:

Returns the type of the elements of this array type.

getClassName

public java.lang.String getClassName()

Returns the binary name of the class corresponding to this type. This method must not be used on method types.

Returns:

the binary name of the class corresponding to this type.

getInternalName

public java.lang.String getInternalName()

Returns the internal name of the class corresponding to this object or array type. The internal name of a class is its fully qualified name (as returned by Class.getName(), where '.' are replaced by '/'). This method should only be used for an object or array type.

Returns:

the internal name of the class corresponding to this object type.

getArgumentTypes

public Type[] getArgumentTypes()

Returns the argument types of methods of this type. This method should only be used for method types.

Returns:

the argument types of methods of this type.

getReturnType

public Type getReturnType()

Returns the return type of methods of this type. This method should only be used for method types.

Returns:

the return type of methods of this type.

getArgumentsAndReturnSizes

public int getArgumentsAndReturnSizes()

Returns the size of the arguments and of the return value of methods of this type. This method should only be used for method types.

Returns:

the size of the arguments of the method (plus one for the implicit this argument), argumentsSize, and the size of its return value, returnSize, packed into a single int i = (argumentsSize << 2) | returnSize (argumentsSize is therefore equal to i >> 2, and returnSize to i & 0x03).

getDescriptor

public java.lang.String getDescriptor()

Returns the descriptor corresponding to this type.

Returns:

the descriptor corresponding to this type.

getMethodDescriptor

public static java.lang.String getMethodDescriptor(Type returnType,
                                                   Type... argumentTypes)

Returns the descriptor corresponding to the given argument and return types.

Parameters:

returnType - the return type of the method.

argumentTypes - the argument types of the method.

Returns:

the descriptor corresponding to the given argument and return types.

getInternalName

public static java.lang.String getInternalName(java.lang.Class<?> clazz)

Returns the internal name of the given class. The internal name of a class is its fully qualified name, as returned by Class.getName(), where '.' are replaced by '/'.

Parameters:

clazz - an object or array class.

Returns:

the internal name of the given class.

getDescriptor

public static java.lang.String getDescriptor(java.lang.Class<?> clazz)

Returns the descriptor corresponding to the given class.

Parameters:

clazz - an object class, a primitive class or an array class.

Returns:

the descriptor corresponding to the given class.

getConstructorDescriptor

public static java.lang.String getConstructorDescriptor(java.lang.reflect.Constructor<?> constructor)

Returns the descriptor corresponding to the given constructor.

Parameters:

constructor - a Constructor object.

Returns:

the descriptor of the given constructor.

getMethodDescriptor

public static java.lang.String getMethodDescriptor(java.lang.reflect.Method method)

Returns the descriptor corresponding to the given method.

Parameters:

method - a Method object.

Returns:

the descriptor of the given method.

getSize

public int getSize()

Returns the size of values of this type. This method must not be used for method types.

Returns:

the size of values of this type, i.e., 2 for long and double, 0 for void and 1 otherwise.

getOpcode

public int getOpcode(int opcode)

Returns a JVM instruction opcode adapted to this Type. This method must not be used for method types.

Parameters:

opcode - a JVM instruction opcode. This opcode must be one of ILOAD, ISTORE, IALOAD, IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG, ISHL, ISHR, IUSHR, IAND, IOR, IXOR and IRETURN.

Returns:

an opcode that is similar to the given opcode, but adapted to this Type. For example, if this type is float and opcode is IRETURN, this method returns FRETURN.

equals

public boolean equals(java.lang.Object object)

Tests if the given object is equal to this type.

Overrides:

equals in class java.lang.Object

Parameters:

object - the object to be compared to this type.

Returns:

true if the given object is equal to this type.

hashCode

public int hashCode()

Returns a hash code value for this type.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this type.

toString

public java.lang.String toString()

Returns a string representation of this type.

Overrides:

toString in class java.lang.Object

Returns:

the descriptor of this type.