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.NoFactoryAvailableException; 021 import org.apache.camel.spi.DataFormat; 022 import org.apache.camel.spi.DataFormatResolver; 023 import org.apache.camel.spi.FactoryFinder; 024 025 /** 026 * Default data format resolver 027 * 028 * @version 029 */ 030 public class DefaultDataFormatResolver implements DataFormatResolver { 031 032 public static final String DATAFORMAT_RESOURCE_PATH = "META-INF/services/org/apache/camel/dataformat/"; 033 034 protected FactoryFinder dataformatFactory; 035 036 public DataFormat resolveDataFormat(String name, CamelContext context) { 037 DataFormat dataFormat = lookup(context, name, DataFormat.class); 038 if (dataFormat == null) { 039 Class<?> type = null; 040 try { 041 if (dataformatFactory == null) { 042 dataformatFactory = context.getFactoryFinder(DATAFORMAT_RESOURCE_PATH); 043 } 044 type = dataformatFactory.findClass(name); 045 } catch (NoFactoryAvailableException e) { 046 // ignore 047 } catch (Exception e) { 048 throw new IllegalArgumentException("Invalid URI, no DataFormat registered for scheme: " + name, e); 049 } 050 051 if (type == null) { 052 type = context.getClassResolver().resolveClass(name); 053 } 054 055 if (type != null) { 056 if (DataFormat.class.isAssignableFrom(type)) { 057 dataFormat = (DataFormat) context.getInjector().newInstance(type); 058 } else { 059 throw new IllegalArgumentException("Resolving dataformat: " + name + " detected type conflict: Not a DataFormat implementation. Found: " + type.getName()); 060 } 061 } 062 } 063 064 return dataFormat; 065 } 066 067 private static <T> T lookup(CamelContext context, String ref, Class<T> type) { 068 try { 069 return context.getRegistry().lookupByNameAndType(ref, type); 070 } catch (Exception e) { 071 // need to ignore not same type and return it as null 072 return null; 073 } 074 } 075 }