Package javassist.util.proxy

Class FactoryHelper

java.lang.Object

javassist.util.proxy.FactoryHelper

public class FactoryHelper
extends Object

A helper class for implementing ProxyFactory. The users of ProxyFactory do not have to see this class.

See Also:

• ProxyFactory

Field Summary

Fields

Modifier and Type	Field	Description
static final int[]	dataSize	The data size of primitive types.
static final Class<?>[]	primitiveTypes	Class objects representing primitive types.
static final String[]	unwarpMethods	The names of methods for obtaining a primitive value from a wrapper object.
static final String[]	unwrapDesc	The descriptors of the unwrapping methods contained in unwrapMethods.
static final String[]	wrapperDesc	The descriptors of the constructors of wrapper classes.
static final String[]	wrapperTypes	The fully-qualified names of wrapper classes for primitive types.

Constructor Summary

Constructors

Constructor	Description
FactoryHelper()

Method Summary

Modifier and Type	Method	Description
static Class<?>	toClass(ClassFile cf, Class<?> neighbor, ClassLoader loader, ProtectionDomain domain)	Loads a class file by a given class loader.
static Class<?>	toClass(ClassFile cf, ClassLoader loader)	Deprecated.
static Class<?>	toClass(ClassFile cf, ClassLoader loader, ProtectionDomain domain)	Deprecated.
static Class<?>	toClass(ClassFile cf, MethodHandles.Lookup lookup)	Loads a class file by a given lookup.
static final int	typeIndex(Class<?> type)	Returns an index for accessing arrays in this class.
static void	writeFile(ClassFile cf, String directoryName)	Writes a class file.

Methods inherited from class java.lang.Object

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

Field Details

primitiveTypes

public static final Class<?>[] primitiveTypes

Class objects representing primitive types.

wrapperTypes

public static final String[] wrapperTypes

The fully-qualified names of wrapper classes for primitive types.

wrapperDesc

public static final String[] wrapperDesc

The descriptors of the constructors of wrapper classes.

unwarpMethods

public static final String[] unwarpMethods

The names of methods for obtaining a primitive value from a wrapper object. For example, intValue() is such a method for obtaining an integer value from a java.lang.Integer object.

unwrapDesc

public static final String[] unwrapDesc

The descriptors of the unwrapping methods contained in unwrapMethods.

dataSize

public static final int[] dataSize

The data size of primitive types. long and double are 2; the others are 1.

Constructor Details

FactoryHelper

public FactoryHelper()

Method Details

typeIndex

public static final int typeIndex(Class<?> type)

Returns an index for accessing arrays in this class.

Throws:

RuntimeException - if a given type is not a primitive type.

toClass

public static Class<?> toClass(ClassFile cf,
 ClassLoader loader)
                        throws CannotCompileException

Deprecated.

Loads a class file by a given class loader. This method uses a default protection domain for the class but it may not work with a security manager or a signed jar file.

Throws:

CannotCompileException

See Also:

• toClass(ClassFile,Class,ClassLoader,ProtectionDomain)

toClass

public static Class<?> toClass(ClassFile cf,
 ClassLoader loader,
 ProtectionDomain domain)
                        throws CannotCompileException

Deprecated.

Loads a class file by a given class loader.

Parameters:

loader - The class loader. It can be null if neighbor is not null.

domain - if it is null, a default domain is used.

Throws:

CannotCompileException

Since:

3.3

See Also:

• toClass(ClassFile,Class,ClassLoader,ProtectionDomain)

toClass

public static Class<?> toClass(ClassFile cf,
 Class<?> neighbor,
 ClassLoader loader,
 ProtectionDomain domain)
                        throws CannotCompileException

Loads a class file by a given class loader.

Parameters:

neighbor - a class belonging to the same package that the loaded class belongs to. It can be null.

loader - The class loader. It can be null if neighbor is not null.

domain - if it is null, a default domain is used.

Throws:

CannotCompileException

Since:

3.3

toClass

public static Class<?> toClass(ClassFile cf,
 MethodHandles.Lookup lookup)
                        throws CannotCompileException

Loads a class file by a given lookup.

Parameters:

lookup - used to define the class.

Throws:

CannotCompileException

Since:

3.24

writeFile

public static void writeFile(ClassFile cf,
 String directoryName)
                      throws CannotCompileException

Writes a class file.

Throws:

CannotCompileException