org.richfaces.fragment.common

Class TypeResolver

java.lang.Object

org.richfaces.fragment.common.TypeResolver

public final class TypeResolver
extends Object

Enhanced type resolution utilities. Originally based on org.springframework.core.GenericTypeResolver.

Author:

Jonathan Halterman

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TypeResolver.Unknown An unknown type.

Method Summary

Methods

Modifier and Type	Method and Description
static void	disableCache() Disables the internal caching of resolved TypeVariables.
static void	enableCache() Enables the internal caching of resolved TypeVariables.
static Type	resolveBound(TypeVariable<?> typeVariable) Resolves the first bound for the typeVariable, returning Unknown.class if none can be resolved.
static Type	resolveGenericType(Class<?> type, Type subType) Returns the generic type using type variable information from the subType else null if the generic type cannot be resolved.
static <T,S extends T> Class<?>	resolveRawArgument(Class<T> type, Class<S> subType) Returns the raw class representing the type argument for the type using type variable information from the subType.
static Class<?>	resolveRawArgument(Type genericType, Class<?> subType) Returns the raw class representing the type argument for the genericType using type variable information from the subType.
static <T,S extends T> Class<?>[]	resolveRawArguments(Class<T> type, Class<S> subType) Returns an array of raw classes representing type arguments for the type using type variable information from the subType.
static Class<?>[]	resolveRawArguments(Type genericType, Class<?> subType) Returns an array of raw classes representing type arguments for the genericType using type variable information from the subType.
static Class<?>	resolveRawClass(Type genericType, Class<?> subType) Resolves the raw class for the genericType, using the type variable information from the subType else TypeResolver.Unknown if the raw class cannot be resolved.

Methods inherited from class java.lang.Object

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

Method Detail

enableCache

public static void enableCache()

Enables the internal caching of resolved TypeVariables.

disableCache

public static void disableCache()

Disables the internal caching of resolved TypeVariables.

resolveRawArgument

public static <T,S extends T> Class<?> resolveRawArgument(Class<T> type,
                                          Class<S> subType)

Returns the raw class representing the type argument for the type using type variable information from the subType. If no arguments can be resolved then Unknown.class is returned.

Parameters:

type - to resolve argument for

subType - to extract type variable information from

Returns:

type argument for type else Unknown.class if no type arguments are declared

Throws:

IllegalArgumentException - if more or less than one type argument is resolved for the type

resolveRawArgument

public static Class<?> resolveRawArgument(Type genericType,
                          Class<?> subType)

Returns the raw class representing the type argument for the genericType using type variable information from the subType. If genericType is an instance of class, then genericType is returned. If no arguments can be resolved then Unknown.class is returned.

Parameters:

genericType - to resolve argument for

subType - to extract type variable information from

Returns:

type argument for genericType else Unknown.class if no type arguments are declared

Throws:

IllegalArgumentException - if more or less than one type argument is resolved for the genericType

resolveRawArguments

public static <T,S extends T> Class<?>[] resolveRawArguments(Class<T> type,
                                             Class<S> subType)

Returns an array of raw classes representing type arguments for the type using type variable information from the subType. Arguments for type that cannot be resolved are returned as Unknown.class. If no arguments can be resolved then null is returned.

Parameters:

type - to resolve arguments for

subType - to extract type variable information from

Returns:

array of raw classes representing type arguments for the type else null if no type arguments are declared

resolveRawArguments

public static Class<?>[] resolveRawArguments(Type genericType,
                             Class<?> subType)

Returns an array of raw classes representing type arguments for the genericType using type variable information from the subType. Arguments for genericType that cannot be resolved are returned as Unknown.class. If no arguments can be resolved then null is returned.

Parameters:

genericType - to resolve arguments for

subType - to extract type variable information from

Returns:

array of raw classes representing type arguments for the genericType else null if no type arguments are declared

resolveGenericType

public static Type resolveGenericType(Class<?> type,
                      Type subType)

Returns the generic type using type variable information from the subType else null if the generic type cannot be resolved.

Parameters:

type - to resolve generic type for

subType - to extract type variable information from

Returns:

generic type else null if it cannot be resolved

resolveRawClass

public static Class<?> resolveRawClass(Type genericType,
                       Class<?> subType)

Resolves the raw class for the genericType, using the type variable information from the subType else TypeResolver.Unknown if the raw class cannot be resolved.

Parameters:

type - to resolve raw class for

subType - to extract type variable information from

Returns:

raw class for the genericType else TypeResolver.Unknown if it cannot be resolved

resolveBound

public static Type resolveBound(TypeVariable<?> typeVariable)

Resolves the first bound for the typeVariable, returning Unknown.class if none can be resolved.