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.spi; 018 019 import org.apache.camel.Service; 020 import org.apache.camel.TypeConverter; 021 022 /** 023 * Registry for type converters. 024 * 025 * @version 026 */ 027 public interface TypeConverterRegistry extends Service { 028 029 /** 030 * Utilization statistics of the this registry. 031 */ 032 interface Statistics { 033 034 /** 035 * Number of attempts 036 */ 037 long getAttemptCounter(); 038 039 /** 040 * Number of successful conversions 041 */ 042 long getHitCounter(); 043 044 /** 045 * Number of attempts which cannot be converted as no suitable type converter exists 046 */ 047 long getMissCounter(); 048 049 /** 050 * Number of failed attempts during type conversion 051 */ 052 long getFailedCounter(); 053 054 /** 055 * Reset the counters 056 */ 057 void reset(); 058 } 059 060 /** 061 * Registers a new type converter 062 * 063 * @param toType the type to convert to 064 * @param fromType the type to convert from 065 * @param typeConverter the type converter to use 066 */ 067 void addTypeConverter(Class<?> toType, Class<?> fromType, TypeConverter typeConverter); 068 069 /** 070 * Registers a new fallback type converter 071 * 072 * @param typeConverter the type converter to use 073 * @param canPromote whether or not the fallback type converter can be promoted to a first class type converter 074 */ 075 void addFallbackTypeConverter(TypeConverter typeConverter, boolean canPromote); 076 077 /** 078 * Performs a lookup for a given type converter. 079 * 080 * @param toType the type to convert to 081 * @param fromType the type to convert from 082 * @return the type converter or <tt>null</tt> if not found. 083 */ 084 TypeConverter lookup(Class<?> toType, Class<?> fromType); 085 086 /** 087 * Sets the injector to be used for creating new instances during type conversions. 088 * 089 * @param injector the injector 090 */ 091 void setInjector(Injector injector); 092 093 /** 094 * Gets the injector 095 * 096 * @return the injector 097 */ 098 Injector getInjector(); 099 100 /** 101 * Gets the utilization statistics of this type converter registry 102 * 103 * @return the utilization statistics 104 */ 105 Statistics getStatistics(); 106 107 }