Selector (nacos-api 2.2.4-x86 2.2.4-x86 API)

所有超级接口:

java.io.Serializable

所有已知实现类:

AbstractCmdbSelector
```
public interface Selector<R,C,E>
extends java.io.Serializable
```
The Selector mainly work on the logic of parse and select. parse(Object) allow user accept the condition which provided by Nacos to build the select(Object) judge logic. select(Object) allow user to execute the logic to get the target result they want. getType() will return the type. getContextType() will return the context type which used by select(Object).
Now, Nacos only provide the AbstractCmdbSelector for user to implement their own select logic. Other type is waiting.

作者:

chenglu

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`java.lang.String`	`getContextType()`	Get the select context which usede by `select(Object)`.
`java.lang.String`	`getType()`	Get the selector type.
`Selector<R,C,E>`	`parse(E expression)`	parse the selector, build the inner info which used by `select(Object)`.
`R`	`select(C context)`	select the target result.

- 方法详细资料
  - parse
```
Selector<R,C,E> parse(E expression)
                           throws NacosException
```
    parse the selector, build the inner info which used by select(Object).
    
    参数:
    
    expression - expression.
    
    返回:
    
    selector.
    
    抛出:
    
    NacosException - parse failed exception.
  - select
```
R select(C context)
```
    select the target result.
    
    参数:
    
    context - selector context.
    
    返回:
    
    select result.
  - getType
```
java.lang.String getType()
```
    Get the selector type.
    
    返回:
    
    selector type.
  - getContextType
```
java.lang.String getContextType()
```
    Get the select context which usede by select(Object).
    
    返回:
    
    selector context type.