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.component.bean;
018    
019    import org.apache.camel.Converter;
020    import org.apache.camel.Exchange;
021    import org.apache.camel.FallbackConverter;
022    import org.apache.camel.TypeConverter;
023    import org.apache.camel.spi.TypeConverterRegistry;
024    
025    /**
026     * A set of converter methods for working with beans
027     */
028    @Converter
029    public final class BeanConverter {
030    
031        private BeanConverter() {
032            // Helper Class
033        }
034    
035        @FallbackConverter
036        @SuppressWarnings("unchecked")
037        public static Object convertTo(Class<?> type, Exchange exchange, Object value, TypeConverterRegistry registry) {
038            // use a fallback type converter so we can convert the embedded body if the value is BeanInvocation
039            if (BeanInvocation.class.isAssignableFrom(value.getClass())) {
040    
041                BeanInvocation bi = (BeanInvocation) value;
042                if (bi.getArgs() == null || bi.getArgs().length != 1) {
043                    // not possible to convert at this time as we try to convert the data passed in at first argument
044                    return Void.TYPE;
045                }
046    
047                Class from = bi.getArgs()[0].getClass();
048                Object body = bi.getArgs()[0];
049    
050                // maybe from is already the type we want
051                if (from.isAssignableFrom(type)) {
052                    return body;
053                }
054    
055                // no then try to lookup a type converter
056                TypeConverter tc = registry.lookup(type, from);
057                if (tc != null) {
058                    return tc.convertTo(type, exchange, body);
059                }
060            }
061    
062            return null;
063        }
064    
065    }