com.hammurapi.convert
Class DuckConverterFactory

java.lang.Object
  com.hammurapi.convert.DuckConverterFactory

public class DuckConverterFactory
extends Object

Creates converters which use "duck" typing.

Author:

Pavel

Constructor Summary

DuckConverterFactory()

Method Summary

static Integer	classAffinity(Class subClass, Class superClass) Calculates how close is subclass to superclass in class hierarchy.
static boolean	duckMap(Class theInterface, Class theClass, Map<Method,Method> methodMap) Duck maps source (interface methods) to compatible target (class) methods.
static boolean	duckMap(Method[] interfaceMethods, Method[] classMethods, Map<Method,Method> methodMap) Duck maps source (interface methods) to compatible target (class) methods.
static ClassLoader	getChildClassLoader(ClassLoader cl1, ClassLoader cl2)
static Class[]	getClassInterfaces(Class sourceClass)
static ConverterClosure	getConverter(Class sourceClass, Class targetInterface, boolean lenient)

Methods inherited from class java.lang.Object

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

Constructor Detail

DuckConverterFactory

public DuckConverterFactory()

Method Detail

getConverter

public static ConverterClosure getConverter(Class sourceClass,
                                            Class targetInterface,
                                            boolean lenient)

Parameters:

sourceClass -

targetInterface -

lenient - If true converter is created even not all interface methods could be mapped to class methods.

Returns:

Converter which can "duck-type" instance of source class to target interface or null if conversion is not possible. Methods are mapped as follows: return types shall be compatible, arguments shall be compatible, exception declarations are ignored.

duckMap

public static boolean duckMap(Class theInterface,
                              Class theClass,
                              Map<Method,Method> methodMap)

Duck maps source (interface methods) to compatible target (class) methods.

Parameters:

interfaceMethods - Interface methods.

classMethods - Class methods

methodMap - Method map (interface to class methods).

Returns:

true if all source methods have been mapped.

duckMap

public static boolean duckMap(Method[] interfaceMethods,
                              Method[] classMethods,
                              Map<Method,Method> methodMap)

Duck maps source (interface methods) to compatible target (class) methods. Mapped interface entries are set to null.

Parameters:

interfaceMethods - Interface methods.

classMethods - Class methods

methodMap - Method map (interface to class methods).

Returns:

true if all source methods have been mapped.

classAffinity

public static Integer classAffinity(Class subClass,
                                    Class superClass)

Calculates how close is subclass to superclass in class hierarchy.

Parameters:

subClass -

superClass -

Returns:

affinity, or null if classes don't belong to the same class hierarchy.

getChildClassLoader

public static ClassLoader getChildClassLoader(ClassLoader cl1,
                                              ClassLoader cl2)

Parameters:

cl1 -

cl2 -

Returns:

Child classloader or null if classloaders are not related

getClassInterfaces

public static Class[] getClassInterfaces(Class sourceClass)

Parameters:

sourceClass -

Returns:

all interfaces implemented by this class