| /******************************************************************************* |
| * Copyright (c) 2008, 2017 xored software, Inc. 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: |
| * xored software, Inc. - initial API and Implementation (Andrei Sobolev) |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.core; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.dltk.core.DLTKCore; |
| import org.eclipse.dltk.core.IModelProvider; |
| import org.eclipse.dltk.core.IProjectFragmentFactory; |
| import org.eclipse.dltk.core.SimpleClassDLTKExtensionManager; |
| import org.eclipse.dltk.core.SimpleDLTKExtensionManager.ElementInfo; |
| import org.eclipse.dltk.utils.NatureExtensionManager; |
| |
| /** |
| * Used to provide or replace some model elements in structure model. |
| */ |
| public class ModelProviderManager { |
| private static final String EXT_POINT = DLTKCore.PLUGIN_ID + ".model"; |
| |
| private static final String REQUIRES = "requires"; |
| private static final String ID = "id"; |
| private static final String LANGUAGE = "language"; |
| private static Map<String, IModelProvider[]> providers = null; |
| |
| public synchronized static IModelProvider[] getProviders(String lang) { |
| if (providers == null) { |
| providers = new HashMap<>(); |
| |
| final SimpleClassDLTKExtensionManager manager = new SimpleClassDLTKExtensionManager( |
| EXT_POINT) { |
| @Override |
| protected boolean isValidElement( |
| IConfigurationElement confElement) { |
| return "model".equals(confElement.getName()); |
| } |
| }; |
| ElementInfo[] infos = manager.getElementInfos(); |
| Map<String, List<ElementInfo>> langToElementList = new HashMap<>(); |
| // Fill element names and sort elements by language |
| for (int i = 0; i < infos.length; i++) { |
| String langauge = infos[i].getConfig().getAttribute(LANGUAGE); |
| if (langToElementList.containsKey(langauge)) { |
| List<ElementInfo> elements = langToElementList |
| .get(langauge); |
| elements.add(infos[i]); |
| } else { |
| List<ElementInfo> elements = new ArrayList<>(); |
| elements.add(infos[i]); |
| langToElementList.put(langauge, elements); |
| } |
| } |
| for (Map.Entry<String, List<ElementInfo>> entry : langToElementList |
| .entrySet()) { |
| String language = entry.getKey(); |
| List<ElementInfo> elements = entry.getValue(); |
| |
| Map<String, ElementInfo> names = new HashMap<>(); // Contains |
| // map |
| // for |
| // all |
| // ids |
| for (int i = 0; i < elements.size(); i++) { |
| ElementInfo info = elements.get(i); |
| String name = info.getConfig().getAttribute(ID); |
| names.put(name, info); |
| } |
| List<IModelProvider> result = new ArrayList<>(); // Final |
| // IModelProvider |
| // elements |
| Set<String> added = new HashSet<>(); // Contain names for |
| // added elements |
| // Process elements and keep dependencies |
| List<ElementInfo> toProcess = new ArrayList<>(); |
| toProcess.addAll(elements); |
| while (!toProcess.isEmpty()) { |
| ElementInfo info = toProcess.remove(0); |
| String requires = info.getConfig().getAttribute(REQUIRES); |
| if (requires == null) { |
| result.add( |
| (IModelProvider) manager.getInitObject(info)); |
| } else { |
| String req = requires.trim(); |
| if (added.contains(req)) { // Dependency |
| // present |
| result.add((IModelProvider) info.object); |
| } else { |
| if (names.containsKey(req)) { // Dependency exist |
| // Add element to end of process |
| toProcess.add(info); |
| added.add(info.getConfig().getAttribute(ID)); |
| } else { |
| // Dependency doesn't exists so add to results |
| result.add((IModelProvider) info.object); |
| added.add(info.getConfig().getAttribute(ID)); |
| } |
| } |
| } |
| } |
| providers.put(language, |
| result.toArray(new IModelProvider[result.size()])); |
| } |
| } |
| return providers.get(lang); |
| } |
| |
| private static final NatureExtensionManager<IProjectFragmentFactory> projectFragmentFactories = new NatureExtensionManager<IProjectFragmentFactory>( |
| EXT_POINT, IProjectFragmentFactory.class) { |
| @Override |
| protected boolean isValidElement(IConfigurationElement element) { |
| return "projectFragment".equals(element.getName()); |
| } |
| }; |
| |
| public static IProjectFragmentFactory[] getProjectFragmentFactories( |
| String natureId) { |
| return projectFragmentFactories.getInstances(natureId); |
| } |
| |
| } |