/*******************************************************************************
* Copyright (c) 2006, 2008 Soyatec (http://www.soyatec.com) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Soyatec - initial API and implementation
*******************************************************************************/
package org.eclipse.e4.xwt.javabean.metadata.properties;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.eclipse.core.databinding.observable.IObservableCollection;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.e4.xwt.collection.CollectionViewSource;
import org.eclipse.e4.xwt.internal.utils.ObjectUtil;
import org.eclipse.e4.xwt.jface.DefaultViewerLabelProvider;
import org.eclipse.e4.xwt.jface.JFacesHelper;
import org.eclipse.e4.xwt.jface.ObservableMapLabelProvider;
import org.eclipse.e4.xwt.jface.ObservableTreeContentProvider;
import org.eclipse.e4.xwt.metadata.DelegateProperty;
import org.eclipse.e4.xwt.metadata.IProperty;
import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
import org.eclipse.jface.databinding.viewers.ObservableSetContentProvider;
import org.eclipse.jface.viewers.AbstractTreeViewer;
import org.eclipse.jface.viewers.ContentViewer;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.IContentProvider;
/**
* Handle manually the type conversion. Maybe it can be done using the
* IConverter. Only the type of IProperty should be IObservableCollection
*
* @author yyang
*
*/
public class InputBeanProperty extends DelegateProperty {
public InputBeanProperty(IProperty delegate) {
super(delegate);
}
@Override
public void setValue(Object target, Object value)
throws IllegalArgumentException, IllegalAccessException,
InvocationTargetException, SecurityException, NoSuchFieldException {
if (value == null) {
return;
}
Class<?> elementType = getElementType();
if (value.getClass().isArray()) {
elementType = value.getClass().getComponentType();
}
if (value instanceof IObservableList) {
IObservableList list = (IObservableList) value;
Object listElementType = list.getElementType();
if (listElementType instanceof Class<?>) {
elementType = (Class<?>) listElementType;
}
} else if (elementType == Object.class
&& value instanceof Collection<?>) {
Collection<?> collection = (Collection<?>) value;
for (Iterator<?> iterator = collection.iterator(); iterator
.hasNext();) {
Object object = (Object) iterator.next();
if (object != null) {
elementType = object.getClass();
break;
}
}
}
if (target instanceof ContentViewer) {
ContentViewer viewer = (ContentViewer) target;
String[] propertyNames = JFacesHelper.getViewerProperties(viewer);
if (target instanceof AbstractTreeViewer) {
IContentProvider contentProvider = (IContentProvider) viewer.getContentProvider();
if (contentProvider instanceof ObservableTreeContentProvider) {
ObservableTreeContentProvider xwtContentProvider = (ObservableTreeContentProvider) contentProvider;
xwtContentProvider.updateContext(viewer, value);
}
if (contentProvider instanceof ObservableTreeContentProvider) {
ObservableTreeContentProvider listContentProvider = (ObservableTreeContentProvider) contentProvider;
viewer.setLabelProvider(new ObservableMapLabelProvider(
viewer, listContentProvider.getKnownElements(),
propertyNames));
}
}
else {
IContentProvider contentProvider = viewer.getContentProvider();
if (value instanceof List<?> || value.getClass().isArray()) {
if (contentProvider == null) {
contentProvider = new ObservableListContentProvider();
viewer.setContentProvider(contentProvider);
}
if (propertyNames != null && propertyNames.length > 0 && hasDefaultLabelProvider(viewer)
&& contentProvider instanceof ObservableListContentProvider) {
ObservableListContentProvider listContentProvider = (ObservableListContentProvider) contentProvider;
viewer.setLabelProvider(new ObservableMapLabelProvider(
viewer, listContentProvider.getKnownElements(),
propertyNames));
}
} else if (value instanceof Set<?>) {
if (contentProvider == null) {
contentProvider = new ObservableSetContentProvider();
viewer.setContentProvider(contentProvider);
}
if (propertyNames != null && propertyNames.length > 0 && hasDefaultLabelProvider(viewer)
&& contentProvider instanceof ObservableSetContentProvider) {
ObservableSetContentProvider setContentProvider = (ObservableSetContentProvider) contentProvider;
viewer.setLabelProvider(new ObservableMapLabelProvider(
viewer, setContentProvider.getKnownElements(), propertyNames));
}
}
}
}
if (value instanceof CollectionViewSource) {
value = ((CollectionViewSource) value).getView();
} else if ((value instanceof Collection<?>) && !(value instanceof IObservableCollection)) {
value = ObjectUtil.resolveValue(value, IObservableCollection.class, value);
}
super.setValue(target, value);
}
protected boolean hasDefaultLabelProvider(ContentViewer viewer ) {
IBaseLabelProvider labelProvider = viewer.getLabelProvider();
return (labelProvider == null || labelProvider.getClass() == DefaultViewerLabelProvider.class);
}
protected Class<?> getElementType() {
IProperty property = getDelegate();
Class<?> type = property.getType();
if (type == null) {
return Object.class;
}
if (type.isArray()) {
return type.getComponentType();
}
return Object.class;
}
}