| /* |
| * 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.apache.camel.k.loader.java; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.apache.camel.RoutesBuilder; |
| import org.apache.camel.k.CompositeClassloader; |
| import org.apache.camel.k.Runtime; |
| import org.apache.camel.k.Source; |
| import org.apache.camel.k.SourceLoader; |
| import org.apache.camel.k.annotation.Loader; |
| import org.apache.camel.k.support.StringSupport; |
| import org.apache.camel.util.IOHelper; |
| import org.joor.Reflect; |
| |
| @Loader(value = "java") |
| public class JavaSourceLoader implements SourceLoader { |
| private static final Pattern PACKAGE_PATTERN = Pattern.compile("^\\s*package\\s+([a-zA-Z][\\.\\w]*)\\s*;.*$", Pattern.MULTILINE); |
| |
| @Override |
| public List<String> getSupportedLanguages() { |
| return Collections.singletonList("java"); |
| } |
| |
| @Override |
| public RoutesBuilder load(Runtime runtime, Source source) { |
| try (InputStream is = source.resolveAsInputStream(runtime.getCamelContext())) { |
| final String content = IOHelper.loadText(is); |
| final String name = determineQualifiedName(source, content); |
| final Reflect compiled = Reflect.compile(name, content); |
| final RoutesBuilder instance = compiled.create().get(); |
| |
| // The given source may contains additional nested classes which are unknown to Camel |
| // as they are associated to the ClassLoader used to compile the source thus we need |
| // to add it to the ApplicationContextClassLoader. |
| final ClassLoader loader = runtime.getCamelContext().getApplicationContextClassLoader(); |
| if (loader instanceof CompositeClassloader) { |
| ((CompositeClassloader) loader).addClassLoader(instance.getClass().getClassLoader()); |
| } |
| |
| return instance; |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private static String determineQualifiedName(Source source, String content) { |
| String name = StringSupport.substringBefore(source.getName(), ".java"); |
| Matcher matcher = PACKAGE_PATTERN.matcher(content); |
| |
| if (matcher.find()) { |
| name = matcher.group(1) + "." + name; |
| } |
| |
| return name; |
| } |
| } |