| /** |
| * 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, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.spring.boot; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.TypeConversionException; |
| import org.apache.camel.support.TypeConverterSupport; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.core.convert.ConversionFailedException; |
| import org.springframework.core.convert.ConversionService; |
| import org.springframework.core.convert.ConverterNotFoundException; |
| import org.springframework.core.convert.TypeDescriptor; |
| |
| public class SpringTypeConverter extends TypeConverterSupport { |
| |
| private final List<ConversionService> conversionServices; |
| private final ConcurrentHashMap<Class<?>, TypeDescriptor> types; |
| |
| @Autowired |
| public SpringTypeConverter(List<ConversionService> conversionServices) { |
| this.conversionServices = conversionServices; |
| this.types = new ConcurrentHashMap<>(); |
| } |
| |
| @Override |
| public <T> T convertTo(Class<T> type, Exchange exchange, Object value) throws TypeConversionException { |
| // do not attempt to convert Camel types |
| if (type.getCanonicalName().startsWith("org.apache")) { |
| return null; |
| } |
| |
| // do not attempt to convert List -> Map. Ognl expression may use this converter as a fallback expecting null |
| if (type.isAssignableFrom(Map.class) && (value.getClass().isArray() || value instanceof Collection)) { |
| return null; |
| } |
| |
| TypeDescriptor sourceType = types.computeIfAbsent(value.getClass(), TypeDescriptor::valueOf); |
| TypeDescriptor targetType = types.computeIfAbsent(type, TypeDescriptor::valueOf); |
| |
| for (ConversionService conversionService : conversionServices) { |
| if (conversionService.canConvert(sourceType, targetType)) { |
| try { |
| return (T)conversionService.convert(value, sourceType, targetType); |
| } catch (ConversionFailedException e) { |
| // if value is a collection or an array the check ConversionService::canConvert |
| // may return true but then the conversion of specific objects may fail |
| // |
| // https://issues.apache.org/jira/browse/CAMEL-10548 |
| // https://jira.spring.io/browse/SPR-14971 |
| // |
| if (e.getCause() instanceof ConverterNotFoundException && isArrayOrCollection(value)) { |
| return null; |
| } else { |
| throw new TypeConversionException(value, type, e); |
| } |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| private boolean isArrayOrCollection(Object value) { |
| return value instanceof Collection || value.getClass().isArray(); |
| } |
| } |