components/camel-spring-boot/src/main/java/org/apache/camel/spring/boot/TypeConversionConfiguration.java

/*
 * 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,
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 * See the License for the specific language governing permissions and
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package org.apache.camel.spring.boot;

import org.apache.camel.CamelContext;
import org.apache.camel.TypeConverter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.support.DefaultConversionService;

import static java.util.Arrays.asList;

@Configuration
@ConditionalOnProperty(value = "camel.springboot.type-conversion", matchIfMissing = true)
public class TypeConversionConfiguration {

    // We explicitly declare the destroyMethod to be "" as the Spring @Bean
    // annotation defaults to AbstractBeanDefinition.INFER_METHOD otherwise
    // and in that case ShutdownableService::shutdown/Service::close
    // (BaseTypeConverterRegistry extends ServiceSupport) would be used for
    // bean destruction. And we want Camel to handle the lifecycle.
    @Bean(destroyMethod = "")
    // Camel handles the lifecycle of this bean
    TypeConverter typeConverter(CamelContext camelContext) {
        return camelContext.getTypeConverter();
    }

    @Bean
    SpringTypeConverter springTypeConverter(CamelContext camelContext, ConversionService[] conversionServices) {
        SpringTypeConverter springTypeConverter = new SpringTypeConverter(asList(conversionServices));
        camelContext.getTypeConverterRegistry().addFallbackTypeConverter(springTypeConverter, true);
        return springTypeConverter;
    }

    @ConditionalOnMissingBean
    @Bean
    ConversionService defaultCamelConversionService(ApplicationContext applicationContext) {
        DefaultConversionService service = new DefaultConversionService();
        for (Converter converter : applicationContext.getBeansOfType(Converter.class).values()) {
            service.addConverter(converter);
        }
        return service;
    }

}