ch.elexis.actions
Class TreeDataLoader

java.lang.Object
  ch.elexis.actions.PersistentObjectLoader
      ch.elexis.actions.TreeDataLoader

All Implemented Interfaces:

DelayableJob.IWorker, ViewerConfigurer.ControlFieldListener, ViewerConfigurer.ICommonViewerContentProvider

public class TreeDataLoader
extends PersistentObjectLoader

A PersistentObjectLoader for Tree-like structures. This reads its contents from a table that has a "parent"-field to denote ancestry

Author:

gerry

Nested Class Summary

Nested classes/interfaces inherited from class ch.elexis.actions.PersistentObjectLoader

PersistentObjectLoader.QueryFilter

Field Summary

Fields inherited from class ch.elexis.actions.PersistentObjectLoader

PARAM_FIELDNAMES, PARAM_VALUES

Constructor Summary

TreeDataLoader(CommonViewer cv, Query<? extends PersistentObject> query, java.lang.String parentField, java.lang.String orderBy)
Create a TreeDataLoader from a @see CommonViewer

Method Summary

java.lang.Object	getParent(java.lang.Object element)
void	updateChildCount(java.lang.Object element, int currentChildCount)
void	updateElement(java.lang.Object parent, int index)
IStatus	work(IProgressMonitor monitor, java.util.HashMap<java.lang.String,java.lang.Object> params)

Methods inherited from class ch.elexis.actions.PersistentObjectLoader

addQueryFilter, applyQueryFilters, changed, dispose, getElements, getQuery, init, inputChanged, isSuspended, removeQueryFilter, reorder, selected, setOrderFields, setSuspended, startListening, stopListening

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeDataLoader

public TreeDataLoader(CommonViewer cv,
                      Query<? extends PersistentObject> query,
                      java.lang.String parentField,
                      java.lang.String orderBy)

Create a TreeDataLoader from a @see CommonViewer

Parameters:

cv - he CommonViewer

qbe - the Query to load the data

parentField - the name of the field that contains ancestry information

Method Detail

work

public IStatus work(IProgressMonitor monitor,
                    java.util.HashMap<java.lang.String,java.lang.Object> params)

getParent

public java.lang.Object getParent(java.lang.Object element)

updateChildCount

public void updateChildCount(java.lang.Object element,
                             int currentChildCount)

updateElement

public void updateElement(java.lang.Object parent,
                          int index)