Package org.jboss.classfilewriter.util

Class DescriptorUtils

java.lang.Object

org.jboss.classfilewriter.util.DescriptorUtils

public class DescriptorUtils
extends Object

Utility class for working with method descriptors

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final String	BOOLEAN_CLASS_DESCRIPTOR
(package private) static final String	BYTE_CLASS_DESCRIPTOR
(package private) static final String	CHAR_CLASS_DESCRIPTOR
(package private) static final String	DOUBLE_CLASS_DESCRIPTOR
(package private) static final String	FLOAT_CLASS_DESCRIPTOR
(package private) static final String	INT_CLASS_DESCRIPTOR
(package private) static final String	LONG_CLASS_DESCRIPTOR
(package private) static final String	SHORT_CLASS_DESCRIPTOR
(package private) static final String	VOID_CLASS_DESCRIPTOR

Constructor Summary

Constructors

Constructor	Description
DescriptorUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	isPrimitive(String descriptor)	returns true if the descriptor represents a primitive type
static boolean	isWide(Class<?> cls)	returns true if the class represents a long or a double
static boolean	isWide(String descriptor)	returns true if the descriptor represents a long or a double
static String	makeDescriptor(Class<?> c)
static String	makeDescriptor(Constructor<?> c)
static String	makeDescriptor(String className)	Changes a class name to the internal form suitable for use in a descriptor string.
static String	methodDescriptor(Method m)
static String	methodDescriptor(String[] parameters, String returnType)
static String[]	parameterDescriptors(Class<?>[] parameters)
static String[]	parameterDescriptors(Method m)
static String[]	parameterDescriptors(String methodDescriptor)	returns an array of String representations of the parameter types.
static String	returnType(String methodDescriptor)
static String	validateDescriptor(String descriptor)	performs basic validation on a descriptor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

VOID_CLASS_DESCRIPTOR

static final String VOID_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

BYTE_CLASS_DESCRIPTOR

static final String BYTE_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

CHAR_CLASS_DESCRIPTOR

static final String CHAR_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

DOUBLE_CLASS_DESCRIPTOR

static final String DOUBLE_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

FLOAT_CLASS_DESCRIPTOR

static final String FLOAT_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

INT_CLASS_DESCRIPTOR

static final String INT_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

LONG_CLASS_DESCRIPTOR

static final String LONG_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

SHORT_CLASS_DESCRIPTOR

static final String SHORT_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

BOOLEAN_CLASS_DESCRIPTOR

static final String BOOLEAN_CLASS_DESCRIPTOR

See Also:

• Constant Field Values

Constructor Details

DescriptorUtils

public DescriptorUtils()

Method Details

makeDescriptor

public static String makeDescriptor(String className)

Changes a class name to the internal form suitable for use in a descriptor string.

e.g. java.lang.String => Ljava/lang/String;

makeDescriptor

public static String makeDescriptor(Class<?> c)

makeDescriptor

public static String makeDescriptor(Constructor<?> c)

parameterDescriptors

public static String[] parameterDescriptors(String methodDescriptor)

returns an array of String representations of the parameter types. Primitives are returned as their native representations, while clases are returned in the internal descriptor form e.g. Ljava/lang/Integer;

parameterDescriptors

public static String[] parameterDescriptors(Method m)

parameterDescriptors

public static String[] parameterDescriptors(Class<?>[] parameters)

returnType

public static String returnType(String methodDescriptor)

isPrimitive

public static boolean isPrimitive(String descriptor)

returns true if the descriptor represents a primitive type

isWide

public static boolean isWide(String descriptor)

returns true if the descriptor represents a long or a double

isWide

public static boolean isWide(Class<?> cls)

returns true if the class represents a long or a double

methodDescriptor

public static String methodDescriptor(Method m)

methodDescriptor

public static String methodDescriptor(String[] parameters,
 String returnType)

validateDescriptor

public static String validateDescriptor(String descriptor)

performs basic validation on a descriptor