cn.sexycode.util.core.cls.internal

类 ApproximatingTypeEnvironment

java.lang.Object

cn.sexycode.util.core.cls.internal.ApproximatingTypeEnvironment

所有已实现的接口:

TypeEnvironment

class ApproximatingTypeEnvironment
extends Object
implements TypeEnvironment

A TypeEnvironment that approximates the unresolved components of a generic simple type or collection to their nearest upper binding. The returned type is always fully resolved.

The concept of "type approximation" is not really sound in general. This class just does what we need within the Hibernate Annotations environment. It's more or less a hack. The idea is that certain types can provide useful information even if they're not fully resolved in the environment. This class tries to turn those types into the nearest fully resolved type that still carries that information.

For example:
T becomes Object.
T extends Foo becomes Foo.
List<T> becomes List<Object>.
List<T extends Foo> becomes List<Foo>.
An array of T extends Foo becomes an array of Foo.

If a type variable has multiple upper bounds, it will be approximated to Object. Lower bounds are ignored.

Wildcards are generally not approximated. Class<?> stays Class<?>. A wildcard within a generic collection is approximated to its upper binding. List<?> becomes List<Object>

Note that Class<T> is not approximated Class<Object>. That would be wrong in any situation. All parametric types that are not type variables, collections or arrays are coarsely approximated to Object.class.

构造器概要

构造器

构造器和说明
ApproximatingTypeEnvironment()

方法概要

限定符和类型	方法和说明
Type	bind(Type type) Binds as many generic components of the given type as possible in this context.
String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

ApproximatingTypeEnvironment

ApproximatingTypeEnvironment()

方法详细资料

bind

public Type bind(Type type)

从接口复制的说明: TypeEnvironment

Binds as many generic components of the given type as possible in this context.

Warning: if the returned Type is a Class, then it's guaranteed to be a regular Java Class. In all other cases, this method might return a custom implementation of some interface that extends Type. Be sure not to mix these objects with Java's implementations of Type to avoid potential identity problems.

This class does not support bindings involving inner classes or upper/lower bounds.

指定者:

bind 在接口中 TypeEnvironment

返回:

a type where the generic arguments have been replaced by raw classes whenever this is possible.

toString

public String toString()

覆盖:

toString 在类中 Object