netconf-api side of the house is quite poor in providing abstractions of NETCONF constructs. Let’s improve the situation by defining the object model of a NETCONF subtree filter . This should be a tree structure, with classes covering subfilter components.

Aside from providing a way to build a filter in code, it needs to provide three facilities:

1. it should be PrettyTreeAware, with SubtreeFilterPrettyTree(), resulting a valid XML string

2. it should have a public static SubtreeFilter readFrom(org.w3c.dom.Element) method, which interprets an Element’s child nodes as the root sibling set and recursively build the filter

3. it should have a public void writeTo(org.w3c.dom.Element)method, which do the opposite of 2): walk the SubtreeFilter ’s siblings and fill the provided element with child elements representing those siblings