Java tutorial
/******************************************************************************* * Copyright (c) 2006, 2010 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.Arrays; 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.core.databinding.observable.list.WritableList; import org.eclipse.e4.xwt.XWT; 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.ILoadingType; 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); // } public InputBeanProperty(IProperty delegate, ILoadingType loadingType) { super(delegate, loadingType); } @Override public void setValue(Object target, Object value) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, SecurityException, NoSuchFieldException { if (value == null) { return; } if (value instanceof Class<?>) { Class<?> type = (Class<?>) value; if (type.isEnum()) { value = new WritableList(XWT.getRealm(), Arrays.asList(type.getEnumConstants()), type); } } 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; } }