org.eaglei.repository.model
Class WritableObjectModel

java.lang.Object
  org.eaglei.repository.model.ImmutableObjectModel
      org.eaglei.repository.model.WritableObjectModel

Direct Known Subclasses:

NamedGraph, Role, User, WorkflowTransition

public abstract class WritableObjectModel
extends ImmutableObjectModel

Outline of all *writable* "Object Model" classes, in which instances can be added and changed. Object Models are Java objects that represent an instance or layer -- i.e. a body of properties on an instance -- in the RDF database. They exist to cache the information and make it easier to manipulate in Java. This class describes a common interface to be implemented by all object models.

Author:

Larry Stone Started March 2011

See Also:

ImmutableObjectModel

Field Summary

protected boolean

dirty flag saying the Java instance has been modified and needs to be uploaded to RDF database

Constructor Summary

WritableObjectModel()

Method Summary

void	commit(javax.servlet.http.HttpServletRequest request) commit - commit any changes made to this object (and any others).
void	decacheInstance() Invalidate local cache after changes.
protected void	setDirty(boolean truth) Change the "dirty" flag to reflect when local change was made.
void	update(javax.servlet.http.HttpServletRequest request) Copy local changes to the RDF database.

Methods inherited from class org.eaglei.repository.model.ImmutableObjectModel

find, findAll, getLabel, getURI

Methods inherited from class java.lang.Object

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

Field Detail

dirty

protected boolean dirty

flag saying the Java instance has been modified and needs to be uploaded to RDF database

Constructor Detail

WritableObjectModel

public WritableObjectModel()

Method Detail

update

public void update(javax.servlet.http.HttpServletRequest request)
            throws javax.servlet.ServletException

Copy local changes to the RDF database. Default implementation has nothing to do for cases where RDF is updated synchronously

Parameters:

request - the HTTP request object from the servlet

Throws:

javax.servlet.ServletException

decacheInstance

public void decacheInstance()

Invalidate local cache after changes. Default implementation has nothing to do for cases where RDF is updated synchronously

setDirty

protected void setDirty(boolean truth)

Change the "dirty" flag to reflect when local change was made.

Parameters:

truth - boolean value where true means there ARE local cahnges

commit

public void commit(javax.servlet.http.HttpServletRequest request)
            throws javax.servlet.ServletException

commit - commit any changes made to this object (and any others).

Note that this includes any other modifications made to RDF database.

Parameters:

request - a HttpServletRequest object.

Throws:

javax.servlet.ServletException - if any.