ComponentLookupService (milky-component 1.0.5 API)

所有已知子接口:

ComponentRegistry<E,C>

所有已知实现类:

AbstractComponentRegistry
```
public interface ComponentLookupService
```
component lookup service.

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
`boolean`	`exists(String name)`
`<T extends Component> boolean`	`exists(T component)`
`Set<String>`	`lookup(AttributeKey key)`
`Set<String>`	`lookup(Tag tag)`
`<T extends Component> Set<String>`	`lookup(Class<T> componentType)`
`<T extends Component> Optional<T>`	`lookup(String name)`

- 方法详细资料
  - lookup
```
<T extends Component> Optional<T> lookup(String name)
```
    参数:
    
    name - component unique name
    
    返回:
    
    Component indentified by unique name
  - lookup
```
<T extends Component> Set<String> lookup(Class<T> componentType)
```
    参数:
    
    componentType - component class
    
    返回:
    
    all component names by component type
  - lookup
```
Set<String> lookup(Tag tag)
```
    参数:
    
    tag - the tag
    
    返回:
    
    all component by specified tag
  - lookup
```
Set<String> lookup(AttributeKey key)
```
    参数:
    
    key - the attribute
    
    返回:
    
    all component by specified attribute
  - exists
```
boolean exists(String name)
```
    参数:
    
    name - component unique name
    
    返回:
    
    true if component indentified by unique name exists, otherwise false
  - exists
```
<T extends Component> boolean exists(T component)
```
    参数:
    
    component -
    
    返回:
    
    true if component exists, otherwise false