| /******************************************************************************* |
| * Copyright (c) 2009, 2019 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 v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-v20.html |
| * |
| * Contributors: |
| * Xored Software Inc - initial API and implementation and/or initial documentation |
| *******************************************************************************/ |
| |
| package org.eclipse.rcptt.ecl.internal.core; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.rcptt.ecl.runtime.IParamConverter; |
| |
| @SuppressWarnings("unchecked") |
| public class ParamConverterManager { |
| private static ParamConverterManager instance; |
| |
| public static ParamConverterManager getInstance() { |
| if (instance == null) { |
| instance = new ParamConverterManager(); |
| } |
| return instance; |
| } |
| |
| private final static String CONVERTER_EXTPT = "org.eclipse.rcptt.ecl.core.param_converter"; |
| private final static String CONVERTER_CLASS_ATTR = "class"; |
| |
| private Map<Class<?>, IParamConverter<?>> converters; |
| |
| private ParamConverterManager() { |
| } |
| |
| public <T> IParamConverter<T> getConverter(Class<T> type) { |
| if (converters == null) { |
| loadScriptlets(); |
| } |
| return (IParamConverter<T>) converters.get(type); |
| } |
| |
| public boolean hasConverter(Class<?> type) { |
| if (converters == null) { |
| loadScriptlets(); |
| } |
| return converters.containsKey(type); |
| } |
| |
| private void loadScriptlets() { |
| converters = new HashMap<Class<?>, IParamConverter<?>>(); |
| IConfigurationElement[] configs = Platform.getExtensionRegistry().getConfigurationElementsFor(CONVERTER_EXTPT); |
| for (IConfigurationElement config : configs) { |
| try { |
| IParamConverter<?> converter = (IParamConverter<?>) config |
| .createExecutableExtension(CONVERTER_CLASS_ATTR); |
| addConverter(converter); |
| } catch (CoreException e) { |
| CorePlugin.getDefault().getLog().log(e.getStatus()); |
| } |
| } |
| } |
| |
| private <T> void addConverter(IParamConverter<T> converter) { |
| Class<T> clazz = converter.forType(); |
| converters.put(clazz, converter); |
| } |
| } |