net.sf.saxon.query

Interface UpdateAgent

public interface UpdateAgent

An UpdateAgent is a callback class that is called to handle a document after it has been updated. Typically the UpdateAgent might take responsibility for writing the updated document back to persistent storage.

Method Summary

Modifier and Type	Method and Description
void	update(NodeInfo node, Controller controller) Handle an updated document.

Method Detail

update

void update(NodeInfo node,
            Controller controller)
     throws XPathException

Handle an updated document. This method is called by XQueryExpression.runUpdate(DynamicQueryContext, UpdateAgent) once for each document (or more generally, for the root of each tree) that has been modified by the update query.

Parameters:

node - the root of the tree that has been updated

controller - the Controller that was used for executing the query

Throws:

XPathException - if the callback code cannot handle the updated document