| /******************************************************************************* |
| * Copyright (c) 2007, 2009 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| * EclipseSource - ongoing development |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.ui.query; |
| |
| import java.util.*; |
| import org.eclipse.equinox.internal.p2.metadata.IRequiredCapability; |
| import org.eclipse.equinox.internal.p2.ui.model.CategoryElement; |
| import org.eclipse.equinox.internal.p2.ui.model.QueriedElementWrapper; |
| import org.eclipse.equinox.p2.metadata.IInstallableUnit; |
| import org.eclipse.equinox.p2.metadata.IRequirement; |
| import org.eclipse.equinox.p2.query.Collector; |
| import org.eclipse.equinox.p2.query.IQueryable; |
| |
| /** |
| * A collector that converts IU's to category elements as it accepts them. |
| * It can be configured so that it is never empty. |
| * |
| * @since 3.4 |
| */ |
| public class CategoryElementWrapper extends QueriedElementWrapper { |
| |
| // Used to track nested categories |
| private Set<String> referredIUs = new HashSet<String>(); |
| |
| public CategoryElementWrapper(IQueryable<?> queryable, Object parent) { |
| super(queryable, parent); |
| } |
| |
| protected boolean shouldWrap(Object match) { |
| if (match instanceof IInstallableUnit) { |
| IInstallableUnit iu = (IInstallableUnit) match; |
| Collection<IRequirement> requirements = iu.getRequirements(); |
| for (IRequirement requirement : requirements) { |
| if (requirement instanceof IRequiredCapability) { |
| if (((IRequiredCapability) requirement).getNamespace().equals(IInstallableUnit.NAMESPACE_IU_ID)) { |
| referredIUs.add(((IRequiredCapability) requirement).getName()); |
| } |
| } |
| } |
| |
| Iterator<?> iter = super.getCollection().iterator(); |
| // Don't add the same category IU twice. |
| while (iter.hasNext()) { |
| CategoryElement element = (CategoryElement) iter.next(); |
| if (element.shouldMerge(iu)) { |
| element.mergeIU(iu); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| public Collection<?> getElements(Collector<?> collector) { |
| if (collector.isEmpty()) |
| return super.getElements(collector); |
| Collection<?> results = super.getElements(collector); |
| cleanList(); |
| return results; |
| } |
| |
| protected Object wrap(Object item) { |
| IInstallableUnit iu = (IInstallableUnit) item; |
| return super.wrap(new CategoryElement(parent, iu)); |
| } |
| |
| private void cleanList() { |
| removeNestedCategories(); |
| } |
| |
| private void removeNestedCategories() { |
| CategoryElement[] categoryIUs = getCollection().toArray(new CategoryElement[getCollection().size()]); |
| // If any other element refers to a category element, remove it from the list |
| for (int i = 0; i < categoryIUs.length; i++) { |
| if (referredIUs.contains(categoryIUs[i].getIU().getId())) { |
| getCollection().remove(categoryIUs[i]); |
| } |
| } |
| } |
| } |