| 1 | package de.uka.ipd.sdq.pcmbench.ui.provider.categoryaware; |
| 2 | |
| 3 | |
| 4 | import java.util.ArrayList; |
| 5 | import java.util.Collection; |
| 6 | import java.util.HashMap; |
| 7 | import java.util.Iterator; |
| 8 | |
| 9 | import org.eclipse.emf.common.notify.AdapterFactory; |
| 10 | import org.eclipse.emf.ecore.EObject; |
| 11 | import org.eclipse.emf.edit.provider.IDisposable; |
| 12 | import org.eclipse.emf.edit.provider.IEditingDomainItemProvider; |
| 13 | import org.eclipse.emf.edit.provider.IItemLabelProvider; |
| 14 | import org.eclipse.emf.edit.provider.IItemPropertySource; |
| 15 | import org.eclipse.emf.edit.provider.IItemProviderDecorator; |
| 16 | import org.eclipse.emf.edit.provider.IStructuredItemContentProvider; |
| 17 | import org.eclipse.emf.edit.provider.ITreeItemContentProvider; |
| 18 | import org.eclipse.emf.edit.provider.ItemProviderDecorator; |
| 19 | |
| 20 | /** |
| 21 | * @author Snowball |
| 22 | * This class implements an IItemProvider which is capable of inserting pseudo- |
| 23 | * nodes into the tree based view of its items. These pseudo nodes are used to |
| 24 | * categorise the elements of the root nodes (e.g, Component->{Provided Roles, RequiredRoles, ...}. |
| 25 | * Categories are configurable using |
| 26 | * EMF Refelection and CategoryDescriptors. This class uses GenericCategoryItemProvider |
| 27 | * as child provider to actually render the pseudo nodes. It decorated the item provider |
| 28 | * of the model object which should be displayed using categories. |
| 29 | */ |
| 30 | public class CategoryAwareItemProvider extends ItemProviderDecorator |
| 31 | implements IEditingDomainItemProvider, IStructuredItemContentProvider, |
| 32 | ITreeItemContentProvider, IItemLabelProvider, IItemPropertySource, |
| 33 | IItemProviderDecorator, IDisposable { |
| 34 | |
| 35 | /* (non-Javadoc) |
| 36 | * @see org.eclipse.emf.edit.provider.ItemProviderDecorator#dispose() |
| 37 | * Remember also to send the dispose() signal to our child item providers for the |
| 38 | * categories |
| 39 | */ |
| 40 | @Override |
| 41 | public void dispose() { |
| 42 | for (Iterator<Collection> childCacheIterator = childCache.values().iterator(); childCacheIterator.hasNext(); ) |
| 43 | { |
| 44 | for(Iterator<GenericCategoryItemProvider> itemProviderIterator = childCacheIterator.next().iterator(); itemProviderIterator.hasNext();) |
| 45 | { |
| 46 | itemProviderIterator.next().dispose(); |
| 47 | } |
| 48 | } |
| 49 | super.dispose(); |
| 50 | } |
| 51 | |
| 52 | private ICategoryDescriptions categories; |
| 53 | |
| 54 | private HashMap<EObject, Collection> childCache = new HashMap<EObject, Collection>(); |
| 55 | |
| 56 | public CategoryAwareItemProvider(AdapterFactory adapterFactory, |
| 57 | ICategoryDescriptions categories) { |
| 58 | super(adapterFactory); |
| 59 | this.categories = categories; |
| 60 | } |
| 61 | |
| 62 | public CategoryAwareItemProvider( |
| 63 | CategoryAwareItemProviderAdapterFactory factory, |
| 64 | ICategoryDescriptions categories) { |
| 65 | super(factory); |
| 66 | this.categories = categories; |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * (non-Javadoc) |
| 71 | * |
| 72 | * @see org.eclipse.emf.edit.provider.ItemProviderDecorator#getChildren(java.lang.Object) |
| 73 | * Get children return now pseudo item providers (GenericCategoryItemProvider) which only |
| 74 | * render the categories and contain themselfs the children of our node - sorted now by |
| 75 | * categories |
| 76 | */ |
| 77 | @Override |
| 78 | public Collection getChildren(Object object) { |
| 79 | if (object instanceof EObject) { |
| 80 | EObject eObject = (EObject) object; |
| 81 | if (categories.hasCategoriesForObject(eObject)) { |
| 82 | if (!childCache.containsKey(eObject)) { |
| 83 | ArrayList children = new ArrayList(); |
| 84 | Collection<CategoryDescriptor> childDescriptors = categories |
| 85 | .getCategoriesForObject(eObject); |
| 86 | for (Iterator<CategoryDescriptor> iterator = childDescriptors |
| 87 | .iterator(); iterator.hasNext();) { |
| 88 | children.add(new GenericCategoryItemProvider( |
| 89 | adapterFactory, iterator.next(), eObject)); |
| 90 | } |
| 91 | childCache.put(eObject, children); |
| 92 | } |
| 93 | return childCache.get(eObject); |
| 94 | } |
| 95 | else |
| 96 | return super.getChildren(object); |
| 97 | } else |
| 98 | return super.getChildren(object); |
| 99 | } |
| 100 | } |