| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.codehaus.groovy.control; |
| |
| import groovy.lang.GroovyRuntimeException; |
| import org.codehaus.groovy.util.URLStreams; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.LinkedHashSet; |
| import java.util.Set; |
| |
| /** |
| * Looks for source file extensions in META-INF/services/org.codehaus.groovy.source.Extensions |
| */ |
| public class SourceExtensionHandler { |
| |
| public static Set<String> getRegisteredExtensions(ClassLoader loader) { |
| Set<String> extensions = new LinkedHashSet<String>(); |
| extensions.add("groovy"); |
| try { |
| Enumeration<URL> globalServices = loader.getResources("META-INF/groovy/org.codehaus.groovy.source.Extensions"); |
| if (!globalServices.hasMoreElements()) { |
| globalServices = loader.getResources("META-INF/services/org.codehaus.groovy.source.Extensions"); |
| } |
| while (globalServices.hasMoreElements()) { |
| URL service = globalServices.nextElement(); |
| try (BufferedReader svcIn = new BufferedReader(new InputStreamReader(URLStreams.openUncachedStream(service)))) { |
| String extension = svcIn.readLine(); |
| while (extension != null) { |
| extension = extension.trim(); |
| if (!extension.startsWith("#") && extension.length() > 0) { |
| extensions.add(extension); |
| } |
| extension = svcIn.readLine(); |
| } |
| } catch (IOException ex) { |
| throw new GroovyRuntimeException("IO Exception attempting to load registered source extension " + |
| service.toExternalForm() + ". Exception: " + ex.toString()); |
| } |
| } |
| } catch (IOException ex) { |
| throw new GroovyRuntimeException("IO Exception getting registered source extensions. Exception: " + ex.toString()); |
| } |
| return extensions; |
| } |
| } |