| /******************************************************************************* |
| * Copyright (c) 2006, 2011 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.text.java; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtensionRegistry; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.InvalidRegistryObjectException; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.eclipse.jface.dialogs.MessageDialog; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| |
| import org.eclipse.jdt.internal.corext.util.Messages; |
| |
| import org.eclipse.jdt.ui.PreferenceConstants; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| |
| /** |
| * @since 3.2 |
| */ |
| public final class ProposalSorterRegistry { |
| private static final String EXTENSION_POINT= "javaCompletionProposalSorters"; //$NON-NLS-1$ |
| private static final String DEFAULT_ID= "org.eclipse.jdt.ui.RelevanceSorter"; //$NON-NLS-1$ |
| |
| private static ProposalSorterRegistry fInstance; |
| |
| public static synchronized ProposalSorterRegistry getDefault() { |
| if (fInstance == null) |
| fInstance= new ProposalSorterRegistry(JavaPlugin.getDefault().getPreferenceStore(), PreferenceConstants.CODEASSIST_SORTER); |
| return fInstance; |
| } |
| |
| private final IPreferenceStore fPreferenceStore; |
| private final String fKey; |
| |
| private Map<String, ProposalSorterHandle> fSorters= null; |
| private ProposalSorterHandle fDefaultSorter; |
| |
| private ProposalSorterRegistry(final IPreferenceStore preferenceStore, final String key) { |
| Assert.isTrue(preferenceStore != null); |
| Assert.isTrue(key != null); |
| fPreferenceStore= preferenceStore; |
| fKey= key; |
| } |
| |
| public ProposalSorterHandle getCurrentSorter() { |
| ensureSortersRead(); |
| String id= fPreferenceStore.getString(fKey); |
| ProposalSorterHandle sorter= fSorters.get(id); |
| return sorter != null ? sorter : fDefaultSorter; |
| } |
| |
| private synchronized void ensureSortersRead() { |
| if (fSorters != null) |
| return; |
| |
| Map<String, ProposalSorterHandle> sorters= new LinkedHashMap<>(); |
| IExtensionRegistry registry= Platform.getExtensionRegistry(); |
| List<IConfigurationElement> elements= new ArrayList<>(Arrays.asList(registry.getConfigurationElementsFor(JavaPlugin.getPluginId(), EXTENSION_POINT))); |
| |
| for (Iterator<IConfigurationElement> iter= elements.iterator(); iter.hasNext();) { |
| IConfigurationElement element= iter.next(); |
| |
| try { |
| |
| ProposalSorterHandle handle= new ProposalSorterHandle(element); |
| final String id= handle.getId(); |
| sorters.put(id, handle); |
| if (DEFAULT_ID.equals(id)) |
| fDefaultSorter= handle; |
| |
| } catch (InvalidRegistryObjectException x) { |
| /* |
| * Element is not valid any longer as the contributing plug-in was unloaded or for |
| * some other reason. Do not include the extension in the list and inform the user |
| * about it. |
| */ |
| Object[] args= { element.toString() }; |
| String message= Messages.format(JavaTextMessages.CompletionProposalComputerRegistry_invalid_message, args); |
| IStatus status= new Status(IStatus.WARNING, JavaPlugin.getPluginId(), IStatus.OK, message, x); |
| informUser(status); |
| } catch (CoreException x) { |
| informUser(x.getStatus()); |
| } |
| } |
| |
| fSorters= sorters; |
| } |
| |
| private void informUser(IStatus status) { |
| JavaPlugin.log(status); |
| String title= JavaTextMessages.CompletionProposalComputerRegistry_error_dialog_title; |
| String message= status.getMessage(); |
| MessageDialog.openError(JavaPlugin.getActiveWorkbenchShell(), title, message); |
| } |
| |
| public ProposalSorterHandle[] getSorters() { |
| ensureSortersRead(); |
| Collection<ProposalSorterHandle> sorters= fSorters.values(); |
| return sorters.toArray(new ProposalSorterHandle[sorters.size()]); |
| } |
| |
| public void select(ProposalSorterHandle handle) { |
| Assert.isTrue(handle != null); |
| String id= handle.getId(); |
| |
| fPreferenceStore.setValue(fKey, id); |
| } |
| } |