Observable (moe.ios.core API)

java.lang.Object
- android.database.Observable<T>

Direct Known Subclasses:

DataSetObservable
```
public abstract class Observable<T>
extends Object
```
Provides methods for registering or unregistering arbitrary observers in an ArrayList. This abstract class is intended to be subclassed and specialized to maintain a registry of observers of specific types and dispatch notifications to them.

Field Summary

Fields
Modifier and Type Field Description

protected ArrayList<T> mObservers
The list of observers.

Constructor Summary

Constructors
Constructor Description

Observable()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`registerObserver(T observer)`	Adds an observer to the list.
`void`	`unregisterAll()`	Remove all registered observers.
`void`	`unregisterObserver(T observer)`	Removes a previously registered observer.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - mObservers
```
protected final ArrayList<T> mObservers
```
    The list of observers. An observer can be in the list at most once and will never be null.
- Constructor Detail
  - Observable
```
public Observable()
```
- Method Detail
  - registerObserver
```
public void registerObserver(T observer)
```
    Adds an observer to the list. The observer cannot be null and it must not already be registered.
    
    Parameters:
    
    observer - the observer to register
    
    Throws:
    
    IllegalArgumentException - the observer is null
    
    IllegalStateException - the observer is already registered
  - unregisterObserver
```
public void unregisterObserver(T observer)
```
    Removes a previously registered observer. The observer must not be null and it must already have been registered.
    
    Parameters:
    
    observer - the observer to unregister
    
    Throws:
    
    IllegalArgumentException - the observer is null
    
    IllegalStateException - the observer is not yet registered
  - unregisterAll
```
public void unregisterAll()
```
    Remove all registered observers.