jetbrick.bean

Class TypeResolverUtils

java.lang.Object

jetbrick.bean.TypeResolverUtils

public final class TypeResolverUtils
extends Object

根据类型定义，获取泛型信息.

Author:

Guoqiang Chen

Constructor Summary

Constructors

Constructor and Description
TypeResolverUtils()

Method Summary

Modifier and Type	Method and Description
static Class<?>	getComponentType(Type type)
static Class<?>	getComponentType(Type type, Class<?> implClass)
static Class<?>	getComponentType(Type type, Class<?> implClass, int index) Returns the component type of the given type.
static Class<?>	getComponentType(Type type, int index)
static Class<?>	getGenericSupertype(Class<?> type)
static Class<?>	getGenericSupertype(Class<?> type, int index) Returns generic supertype for given class and 0-based index.
static Class<?>	getRawType(Type type) Returns raw class for given type.
static Class<?>	getRawType(Type type, Class<?> implClass) Returns raw class for given type when implementation class is known and it makes difference.
static Type	resolveVariable(TypeVariable<?> variable, Class<?> implClass) Resolves TypeVariable with given implementation class.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeResolverUtils

public TypeResolverUtils()

Method Detail

getRawType

public static Class<?> getRawType(Type type)

Returns raw class for given type. Use this method with both regular and generic types.

Parameters:

type - - the type to convert

Returns:

the closest class representing the given type

See Also:

getRawType(java.lang.reflect.Type, Class)

getRawType

public static Class<?> getRawType(Type type,
                                  Class<?> implClass)

Returns raw class for given type when implementation class is known and it makes difference.

Parameters:

type - - given type

implClass - - implementation clas

Returns:

raw class

See Also:

resolveVariable(java.lang.reflect.TypeVariable, Class)

resolveVariable

public static Type resolveVariable(TypeVariable<?> variable,
                                   Class<?> implClass)

Resolves TypeVariable with given implementation class.

Parameters:

variable - - variable

implClass - - implementation class

Returns:

resolved type

getComponentType

public static Class<?> getComponentType(Type type)

getComponentType

public static Class<?> getComponentType(Type type,
                                        Class<?> implClass)

getComponentType

public static Class<?> getComponentType(Type type,
                                        int index)

getComponentType

public static Class<?> getComponentType(Type type,
                                        Class<?> implClass,
                                        int index)

Returns the component type of the given type. Returns null if given type does not have a single component type. For example the following types all have the component-type MyClass:

• MyClass[]
• List<MyClass>
• Foo<? extends MyClass>
• Bar<? super MyClass>
• <T extends MyClass> T[]

Index represents the index of component type, when class supports more then one. For example, Map<A, B> has 2 component types. If index is 0 or positive, than it represents order of component type. If the value is negative, then it represents component type counted from the end! Therefore, the default value of -1 always returns the last component type.

Parameters:

type - - type

implClass - - implementation class

index - - index of component type

Returns:

component type

getGenericSupertype

public static Class<?> getGenericSupertype(Class<?> type)

See Also:

getComponentType(java.lang.reflect.Type)

getGenericSupertype

public static Class<?> getGenericSupertype(Class<?> type,
                                           int index)

Returns generic supertype for given class and 0-based index.

See Also:

getComponentType(java.lang.reflect.Type, int)