| /******************************************************************************* |
| * Copyright (c) 2008, 2017 xored software, Inc. and others. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * xored software, Inc. - initial API and Implementation (Andrei Sobolev) |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui; |
| |
| 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.dltk.core.SimpleClassDLTKExtensionManager; |
| import org.eclipse.dltk.core.SimpleDLTKExtensionManager.ElementInfo; |
| import org.eclipse.dltk.ui.DLTKUIPlugin; |
| import org.eclipse.dltk.ui.IModelCompareProvider; |
| import org.eclipse.dltk.ui.IModelContentProvider; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| |
| /** |
| * Used to provide or replace some model elements in structure model. |
| */ |
| public class UIModelProviderManager { |
| private static final IModelCompareProvider[] NONE_MODEL_COMPARE_PROVIDERS = new IModelCompareProvider[0]; |
| private static final ILabelProvider[] NONE_LABEL_PROVIDERS = new ILabelProvider[0]; |
| private static final IModelContentProvider[] NONE_MODEL_CONTENT_PROVIDERS = new IModelContentProvider[0]; |
| |
| private static final String REQUIRES = "requires"; //$NON-NLS-1$ |
| private static final String ID = "id"; //$NON-NLS-1$ |
| private static final String LANGUAGE = "language"; //$NON-NLS-1$ |
| |
| private static SimpleClassDLTKExtensionManager contentProviderManager = new SimpleClassDLTKExtensionManager( |
| DLTKUIPlugin.PLUGIN_ID + ".modelContentProvider"); //$NON-NLS-1$ |
| |
| private static SimpleClassDLTKExtensionManager labelProviderManager = new SimpleClassDLTKExtensionManager( |
| DLTKUIPlugin.PLUGIN_ID + ".modelLabelProvider"); //$NON-NLS-1$ |
| |
| private static SimpleClassDLTKExtensionManager compareProviderManager = new SimpleClassDLTKExtensionManager( |
| DLTKUIPlugin.PLUGIN_ID + ".modelCompareProvider"); //$NON-NLS-1$ |
| |
| private static Map<String, List<IModelContentProvider>> contentProviders = null; |
| private static Map<String, List<ILabelProvider>> labelProviders = null; |
| private static Map<String, List<IModelCompareProvider>> compareProviders = null; |
| |
| public synchronized static IModelContentProvider[] getContentProviders( |
| String lang) { |
| if (contentProviders == null) { |
| contentProviders = initializeProviders(contentProviderManager); |
| } |
| if (lang == null) { |
| List<IModelContentProvider> providers = new ArrayList<>(); |
| for (List<IModelContentProvider> elements : contentProviders |
| .values()) { |
| providers.addAll(elements); |
| } |
| return providers |
| .toArray(new IModelContentProvider[providers.size()]); |
| } |
| List<IModelContentProvider> result = contentProviders.get(lang); |
| if (result != null) { |
| return result.toArray(new IModelContentProvider[result.size()]); |
| } |
| return NONE_MODEL_CONTENT_PROVIDERS; |
| } |
| |
| public synchronized static ILabelProvider[] getLabelProviders(String lang) { |
| if (labelProviders == null) { |
| labelProviders = initializeProviders(labelProviderManager); |
| } |
| if (lang == null) { |
| List<ILabelProvider> providers = new ArrayList<>(); |
| for (List<ILabelProvider> elements : labelProviders.values()) { |
| providers.addAll(elements); |
| } |
| return providers.toArray(new ILabelProvider[providers.size()]); |
| } |
| List<ILabelProvider> result = labelProviders.get(lang); |
| if (result != null) { |
| return result.toArray(new ILabelProvider[result.size()]); |
| } |
| return NONE_LABEL_PROVIDERS; |
| } |
| |
| public synchronized static IModelCompareProvider[] getCompareProviders( |
| String lang) { |
| if (compareProviders == null) { |
| compareProviders = initializeProviders(compareProviderManager); |
| } |
| if (lang == null) { |
| List<IModelCompareProvider> providers = new ArrayList<>(); |
| for (List<IModelCompareProvider> elements : compareProviders |
| .values()) { |
| providers.addAll(elements); |
| } |
| return providers |
| .toArray(new IModelCompareProvider[providers.size()]); |
| } |
| List<IModelCompareProvider> result = compareProviders.get(lang); |
| if (result != null) { |
| return result.toArray(new IModelCompareProvider[result.size()]); |
| } |
| return NONE_MODEL_COMPARE_PROVIDERS; |
| } |
| |
| private synchronized static <T> Map<String, List<T>> initializeProviders( |
| SimpleClassDLTKExtensionManager manager) { |
| Map<String, List<T>> providers = new HashMap<>(); |
| 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); |
| List<ElementInfo> elements = langToElementList.get(langauge); |
| if (elements == null) { |
| elements = new ArrayList<>(); |
| langToElementList.put(langauge, elements); |
| } |
| elements.add(infos[i]); |
| } |
| for (Map.Entry<String, List<ElementInfo>> entry : langToElementList |
| .entrySet()) { |
| String language = entry.getKey(); |
| List<ElementInfo> elements = entry.getValue(); |
| |
| // Contains map for all ids |
| Set<String> allIds = new HashSet<>(); |
| for (ElementInfo info : elements) { |
| allIds.add(info.getConfig().getAttribute(ID)); |
| } |
| // Final IModelProvider elements |
| List<T> result = new ArrayList<>(); |
| // Contains names for added elements |
| Set<String> added = new HashSet<>(); |
| // Process elements and keep dependencies |
| List<ElementInfo> toProcess = new ArrayList<>(elements); |
| while (!toProcess.isEmpty()) { |
| ElementInfo info = toProcess.remove(0); |
| String requires = info.getConfig().getAttribute(REQUIRES); |
| if (requires == null) { |
| @SuppressWarnings("unchecked") |
| final T obj = (T) manager.getInitObject(info); |
| if (obj != null) { |
| result.add(obj); |
| added.add(info.getConfig().getAttribute(ID)); |
| } |
| } else { |
| requires = requires.trim(); |
| if (added.contains(requires)) { |
| @SuppressWarnings("unchecked") |
| final T obj = (T) manager.getInitObject(info); |
| if (obj != null) { |
| result.add(obj); |
| added.add(info.getConfig().getAttribute(ID)); |
| } |
| } else if (allIds.contains(requires)) { // Dependency exist |
| // Add element to end of process |
| toProcess.add(info); |
| // FIXME check endless loops |
| } else { |
| // Dependency doesn't exists so add to results |
| @SuppressWarnings("unchecked") |
| final T obj = (T) manager.getInitObject(info); |
| if (obj != null) { |
| result.add(obj); |
| added.add(info.getConfig().getAttribute(ID)); |
| } |
| } |
| } |
| } |
| providers.put(language, result); |
| } |
| return providers; |
| } |
| } |