org.basex.query.up
Class Updates

java.lang.Object
  org.basex.query.up.Updates

public final class Updates
extends Object

Holds all update operations and primitives a snapshot contains, checks constraints and finally executes the updates.

Author:

Workgroup DBIS, University of Konstanz 2005-10, ISC License, Lukas Kircher

Constructor Summary

Updates(boolean transform)
Constructor.

Method Summary

void	add(UpdatePrimitive p, QueryContext ctx) Adds an update primitive to the corresponding primitive list.
void	addDataReference(Data d) Adds a data reference to the reference list.
void	apply() Checks constraints and applies all update primitives to the databases if no constraints are hurt.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Updates

public Updates(boolean transform)

Constructor.

Parameters:

transform - update operations are triggered by a transform expression

Method Detail

addDataReference

public void addDataReference(Data d)

Adds a data reference to the reference list.

Parameters:

d - data reference to add

add

public void add(UpdatePrimitive p,
                QueryContext ctx)
         throws QueryException

Adds an update primitive to the corresponding primitive list. Update primitives with fragments as target nodes are treated differently, because they don't effect any existing databases. They may not hurt any constraints however.

Parameters:

p - primitive to add

ctx - query context

Throws:

QueryException - query exception

apply

public void apply()
           throws QueryException

Checks constraints and applies all update primitives to the databases if no constraints are hurt. XQueryUP specification 3.2.2

Throws:

QueryException - query exception