001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.impl; 018 019 import org.apache.camel.CamelContext; 020 import org.apache.camel.NoSuchLanguageException; 021 import org.apache.camel.spi.Language; 022 import org.apache.camel.spi.LanguageResolver; 023 import org.apache.camel.util.FactoryFinder; 024 import org.apache.camel.util.NoFactoryAvailableException; 025 026 /** 027 * @version $Revision: 35332 $ 028 */ 029 public class DefaultLanguageResolver implements LanguageResolver { 030 protected static final FactoryFinder LANGUAGE_FACTORY = new FactoryFinder("META-INF/services/org/apache/camel/language/"); 031 protected static final FactoryFinder LANGUAGE_RESOLVER = new FactoryFinder("META-INF/services/org/apache/camel/language/resolver/"); 032 033 public Language resolveLanguage(String name, CamelContext context) { 034 Class type = null; 035 try { 036 type = LANGUAGE_FACTORY.findClass(name); 037 } catch (NoFactoryAvailableException e) { 038 // ignore 039 } catch (Throwable e) { 040 throw new IllegalArgumentException("Invalid URI, no Language registered for scheme : " + name, e); 041 } 042 if (type != null) { 043 if (Language.class.isAssignableFrom(type)) { 044 return (Language)context.getInjector().newInstance(type); 045 } else { 046 throw new IllegalArgumentException("Type is not a Language implementation. Found: " + type.getName()); 047 } 048 } 049 return noSpecificLanguageFound(name, context); 050 } 051 052 protected Language noSpecificLanguageFound(String name, CamelContext context) { 053 Class type = null; 054 try { 055 type = LANGUAGE_RESOLVER.findClass("default"); 056 } catch (NoFactoryAvailableException e) { 057 // ignore 058 } catch (Throwable e) { 059 throw new IllegalArgumentException("Invalid URI, no Language registered for scheme : " + name, e); 060 } 061 if (type != null) { 062 if (LanguageResolver.class.isAssignableFrom(type)) { 063 LanguageResolver resolver = (LanguageResolver)context.getInjector().newInstance(type); 064 return resolver.resolveLanguage(name, context); 065 } else { 066 throw new IllegalArgumentException("Type is not a LanguageResolver implementation. Found: " + type.getName()); 067 } 068 } 069 throw new NoSuchLanguageException(name); 070 } 071 }