| /******************************************************************************* |
| * Copyright (c) 2008-2011 Chair for Applied Software Engineering, |
| * Technische Universitaet Muenchen. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| ******************************************************************************/ |
| package org.eclipse.emf.ecp.internal.ui; |
| |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.preferences.ConfigurationScope; |
| import org.osgi.service.prefs.BackingStoreException; |
| |
| /** |
| * The preference helper aids storing {key, value} pairs. |
| * |
| * @author pfeifferc |
| * |
| */ |
| public final class PreferenceHelper { |
| |
| private PreferenceHelper() { |
| // nothing to do here |
| } |
| |
| // TODO: ChainSaw namespace? |
| private static final String PREFERENCE_NODE = "ecp"; //$NON-NLS-1$ |
| |
| /** |
| * Get a preference value for a specific key. |
| * |
| * @param key the |
| * @param defaultValue the |
| * @return the value if it exists, otherwise the defaultValue |
| */ |
| public static String getPreference(String key, String defaultValue) { |
| final String value = Platform.getPreferencesService().getRootNode().node(ConfigurationScope.SCOPE) |
| .node(PREFERENCE_NODE).get(key, defaultValue); |
| return value; |
| } |
| |
| /** |
| * Set the preference value for a specific key. Key and value must not equal null. |
| * |
| * @param key the |
| * @param value the |
| */ |
| public static void setPreference(String key, String value) { |
| if (key != null && value != null) { |
| Platform.getPreferencesService().getRootNode().node(ConfigurationScope.SCOPE).node(PREFERENCE_NODE) |
| .put(key, value); |
| try { |
| Platform.getPreferencesService().getRootNode().node(ConfigurationScope.SCOPE).node(PREFERENCE_NODE) |
| .flush(); |
| } catch (final BackingStoreException e) { |
| Activator.log( |
| "Could not persist the preference change: {" + key + ", " + value + "}", e); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| } |
| } |
| } |
| |
| } |