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.converter; 018 019import java.util.Map; 020 021import org.apache.camel.Exchange; 022import org.apache.camel.converter.IOConverterOptimised; 023import org.apache.camel.converter.NIOConverterOptimised; 024import org.apache.camel.converter.ObjectConverterOptimised; 025import org.apache.camel.converter.TimePatternConverterOptimised; 026 027/** 028 * Optimised type converter for performing the most common conversions using the type converters 029 * from camel-core. 030 * <p/> 031 * The most commonly used type converters has been optimised to be invoked in a faster by 032 * using direct method calls instead of a calling via a reflection method call via 033 * {@link InstanceMethodTypeConverter} or {@link StaticMethodTypeConverter}. 034 * In addition the performance is faster because the type converter is not looked up 035 * via a key in the type converter {@link Map}; which requires creating a new object 036 * as they key and perform the map lookup. The caveat is that for any new type converter 037 * to be included it must be manually added by adding the nessasary source code to the 038 * optimised classes such as {@link ObjectConverterOptimised}. 039 */ 040public class OptimisedTypeConverter { 041 042 private final EnumTypeConverter enumTypeConverter = new EnumTypeConverter(); 043 044 /** 045 * Attempts to convert the value to the given type 046 * 047 * @param type the type to convert to 048 * @param exchange the exchange, may be <tt>null</tt> 049 * @param value the value 050 * @return the converted value, or <tt>null</tt> if no optimised core type converter exists to convert 051 */ 052 public Object convertTo(final Class<?> type, final Exchange exchange, final Object value) throws Exception { 053 Object answer; 054 055 // use the optimised type converters and use them in the most commonly used order 056 057 // we need time pattern first as it can do a special String -> long conversion which should happen first 058 answer = TimePatternConverterOptimised.convertTo(type, exchange, value); 059 if (answer == null) { 060 answer = ObjectConverterOptimised.convertTo(type, exchange, value); 061 } 062 if (answer == null) { 063 answer = IOConverterOptimised.convertTo(type, exchange, value); 064 } 065 if (answer == null) { 066 answer = NIOConverterOptimised.convertTo(type, exchange, value); 067 } 068 069 // specially optimised for enums 070 if (answer == null && type.isEnum()) { 071 answer = enumTypeConverter.convertTo(type, exchange, value); 072 } 073 074 return answer; 075 } 076 077}