| /******************************************************************************* |
| * Copyright (c) 2010, 2011 IBM Corporation and others. |
| * |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.bidi.internal; |
| |
| import java.util.*; |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.equinox.bidi.StructuredTextTypeHandlerFactory; |
| import org.eclipse.equinox.bidi.custom.StructuredTextTypeHandler; |
| import org.eclipse.equinox.bidi.internal.consumable.*; |
| |
| /** |
| * Provides services related to registered structured text handlers. |
| */ |
| public class StructuredTextTypesCollector implements IRegistryEventListener { |
| |
| private static final String EXT_POINT = "org.eclipse.equinox.bidi.bidiTypes"; //$NON-NLS-1$ |
| |
| private static final String CE_NAME = "typeDescription"; //$NON-NLS-1$ |
| private static final String ATTR_TYPE = "type"; //$NON-NLS-1$ |
| private static final String ATTR_HANDLER = "class"; //$NON-NLS-1$ |
| |
| private Map<String, StructuredTextTypeHandler> types; |
| private Map<String, IConfigurationElement> factories; |
| |
| static private StructuredTextTypesCollector instance = new StructuredTextTypesCollector(); |
| |
| private StructuredTextTypesCollector() { |
| IExtensionRegistry registry = RegistryFactory.getRegistry(); |
| if (registry != null) |
| registry.addListener(this, EXT_POINT); |
| } |
| |
| /** |
| * @return a static instance. |
| */ |
| static public StructuredTextTypesCollector getInstance() { |
| return instance; |
| } |
| |
| /** |
| * @return a list of all the registered structured text handler types. |
| */ |
| public String[] getTypes() { |
| if (types == null) |
| read(); |
| int size = types.size(); |
| String[] result = new String[size]; |
| types.keySet().toArray(result); |
| return result; |
| } |
| |
| /** |
| * @param type the identifier for a structured text handler. |
| * |
| * @return the structured text handler instance. |
| */ |
| public StructuredTextTypeHandler getHandler(String type) { |
| if (types == null) |
| read(); |
| Object handler = types.get(type); |
| if (handler instanceof StructuredTextTypeHandler) |
| return (StructuredTextTypeHandler) handler; |
| return null; |
| } |
| |
| private void read() { |
| if (types == null) |
| types = new HashMap<>(); |
| else |
| types.clear(); |
| |
| if (factories == null) |
| factories = new HashMap<String, IConfigurationElement>(); |
| else |
| factories.clear(); |
| |
| IExtensionRegistry registry = RegistryFactory.getRegistry(); |
| if (registry == null) { |
| types.putAll(getDefaultTypeHandlers()); |
| return; |
| } |
| |
| IExtensionPoint extPoint = registry.getExtensionPoint(EXT_POINT); |
| |
| for (IExtension extension : extPoint.getExtensions()) { |
| for (IConfigurationElement confElement : extension.getConfigurationElements()) { |
| if (!CE_NAME.equals(confElement.getName())) |
| StructuredTextActivator.logError("BiDi types: unexpected element name " + confElement.getName(), new IllegalArgumentException()); //$NON-NLS-1$ |
| String type = confElement.getAttribute(ATTR_TYPE); |
| Object handler; |
| try { |
| handler = confElement.createExecutableExtension(ATTR_HANDLER); |
| } catch (CoreException e) { |
| StructuredTextActivator.logError("BiDi types: unable to create handler for " + type, e); //$NON-NLS-1$ |
| continue; |
| } |
| if (handler instanceof StructuredTextTypeHandler) { |
| types.put(type, (StructuredTextTypeHandler) handler); |
| factories.put(type, confElement); |
| } |
| } |
| } |
| } |
| |
| public void added(IExtension[] extensions) { |
| types = null; |
| factories = null; |
| } |
| |
| public void removed(IExtension[] extensions) { |
| types = null; |
| factories = null; |
| } |
| |
| public void added(IExtensionPoint[] extensionPoints) { |
| types = null; |
| factories = null; |
| } |
| |
| public void removed(IExtensionPoint[] extensionPoints) { |
| types = null; |
| factories = null; |
| } |
| |
| /** |
| * Returns the default structured text type handlers. These handlers are |
| * also supported without OSGi running. |
| * |
| * @return a map from structured text type handler identifier (key type: {@link String}) |
| * to structured text type handler (value type: {@link StructuredTextTypeHandler}). |
| */ |
| public static Map<String, StructuredTextTypeHandler> getDefaultTypeHandlers() { |
| Map<String, StructuredTextTypeHandler> types = new LinkedHashMap<String, StructuredTextTypeHandler>(); |
| |
| types.put(StructuredTextTypeHandlerFactory.COMMA_DELIMITED, new StructuredTextComma()); |
| types.put(StructuredTextTypeHandlerFactory.EMAIL, new StructuredTextEmail()); |
| types.put(StructuredTextTypeHandlerFactory.FILE, new StructuredTextFile()); |
| types.put(StructuredTextTypeHandlerFactory.JAVA, new StructuredTextJava()); |
| types.put(StructuredTextTypeHandlerFactory.REGEX, new StructuredTextRegex()); |
| types.put(StructuredTextTypeHandlerFactory.SQL, new StructuredTextSql()); |
| types.put(StructuredTextTypeHandlerFactory.UNDERSCORE, new StructuredTextUnderscore()); |
| types.put(StructuredTextTypeHandlerFactory.URL, new StructuredTextURL()); |
| types.put(StructuredTextTypeHandlerFactory.XPATH, new StructuredTextXPath()); |
| |
| return Collections.unmodifiableMap(types); |
| } |
| } |