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 */
017package org.apache.camel.impl;
018
019import org.apache.camel.CamelContext;
020import org.apache.camel.NoFactoryAvailableException;
021import org.apache.camel.spi.DataFormat;
022import org.apache.camel.spi.DataFormatResolver;
023import org.apache.camel.spi.FactoryFinder;
024import org.apache.camel.util.ResolverHelper;
025
026/**
027 * Default data format resolver
028 *
029 * @version
030 */
031public class DefaultDataFormatResolver implements DataFormatResolver {
032
033    public static final String DATAFORMAT_RESOURCE_PATH = "META-INF/services/org/apache/camel/dataformat/";
034
035    protected FactoryFinder dataformatFactory;
036
037    public DataFormat resolveDataFormat(String name, CamelContext context) {
038        // lookup in registry first
039        DataFormat dataFormat = ResolverHelper.lookupDataFormatInRegistryWithFallback(context, name);
040
041        if (dataFormat == null) {
042            Class<?> type = null;
043            try {
044                if (dataformatFactory == null) {
045                    dataformatFactory = context.getFactoryFinder(DATAFORMAT_RESOURCE_PATH);
046                }
047                type = dataformatFactory.findClass(name);
048            } catch (NoFactoryAvailableException e) {
049                // ignore
050            } catch (Exception e) {
051                throw new IllegalArgumentException("Invalid URI, no DataFormat registered for scheme: " + name, e);
052            }
053
054            if (type == null) {
055                type = context.getClassResolver().resolveClass(name);
056            }
057
058            if (type != null) {
059                if (DataFormat.class.isAssignableFrom(type)) {
060                    dataFormat = (DataFormat) context.getInjector().newInstance(type);
061                } else {
062                    throw new IllegalArgumentException("Resolving dataformat: " + name + " detected type conflict: Not a DataFormat implementation. Found: " + type.getName());
063                }
064            }
065        }
066
067        return dataFormat;
068    }
069
070}