Extension

All Known Subinterfaces:

ExtensionSelector, ExtensionTreatment

All Known Implementing Classes:

AbstractExtension, UnresolvedExtensionSelector, UnresolvedExtensionTreatment
```
public interface Extension
```
An extension to the northbound APIs.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`deserialize(byte[] data)`	Deserialize the extension from a byte array.
`List<String>`	`getProperties()`	Gets a list of all properties on the extension.
`<T> T`	`getPropertyValue(String key)`	Gets a property value of an extension.
`byte[]`	`serialize()`	Serialize the extension to a byte array.
`<T> void`	`setPropertyValue(String key, T value)`	Sets a property on the extension.

- Method Detail
  - setPropertyValue
```
<T> void setPropertyValue(String key,
                          T value)
                   throws ExtensionPropertyException
```
    Sets a property on the extension.
    
    Type Parameters:
    
    T - class of the value
    
    Parameters:
    
    key - property key
    
    value - value to set for the given key
    
    Throws:
    
    ExtensionPropertyException - if the given key is not a valid property on this extension
  - getPropertyValue
```
<T> T getPropertyValue(String key)
                throws ExtensionPropertyException
```
    Gets a property value of an extension.
    
    Type Parameters:
    
    T - class of the value
    
    Parameters:
    
    key - property key
    
    Returns:
    
    value of the property
    
    Throws:
    
    ExtensionPropertyException - if the given key is not a valid property on this extension
  - getProperties
```
List<String> getProperties()
```
    Gets a list of all properties on the extension.
    
    Returns:
    
    list of properties
  - serialize
```
byte[] serialize()
```
    Serialize the extension to a byte array.
    
    Returns:
    
    byte array
  - deserialize
```
void deserialize(byte[] data)
```
    Deserialize the extension from a byte array. The properties of this object will be overwritten with the data in the byte array.
    
    Parameters:
    
    data - input byte array