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, org.eclipse.jface.viewers.IContentProvider, org.eclipse.jface.viewers.ILazyTreeContentProvider, org.eclipse.jface.viewers.IStructuredContentProvider

public class TreeDataLoader
extends PersistentObjectLoader
implements org.eclipse.jface.viewers.ILazyTreeContentProvider

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

Nested Class Summary

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

PersistentObjectLoader.QueryFilter

Field Summary

protected java.lang.String	orderBy
protected java.lang.String	parentColumn
protected LazyTree<PersistentObject>	root

Fields inherited from class ch.elexis.actions.PersistentObjectLoader

cv, dj, orderFields, PARAM_FIELDNAMES, PARAM_VALUES, qbe

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)
protected void	setQuery(java.lang.String parent)
void	updateChildCount(java.lang.Object element, int currentChildCount)
void	updateElement(java.lang.Object parent, int index)
org.eclipse.core.runtime.IStatus	work(org.eclipse.core.runtime.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

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

Methods inherited from interface org.eclipse.jface.viewers.IContentProvider

dispose, inputChanged

Field Detail

parentColumn

protected java.lang.String parentColumn

orderBy

protected java.lang.String orderBy

root

protected LazyTree<PersistentObject> root

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 org.eclipse.core.runtime.IStatus work(org.eclipse.core.runtime.IProgressMonitor monitor,
                                             java.util.HashMap<java.lang.String,java.lang.Object> params)

Specified by:

work in interface DelayableJob.IWorker

getParent

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

Specified by:

getParent in interface org.eclipse.jface.viewers.ILazyTreeContentProvider

updateChildCount

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

Specified by:

updateChildCount in interface org.eclipse.jface.viewers.ILazyTreeContentProvider

updateElement

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

Specified by:

updateElement in interface org.eclipse.jface.viewers.ILazyTreeContentProvider

setQuery

protected void setQuery(java.lang.String parent)