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.support; 018 019 import org.apache.camel.Exchange; 020 import org.apache.camel.NoTypeConversionAvailableException; 021 import org.apache.camel.TypeConversionException; 022 import org.apache.camel.TypeConverter; 023 024 /** 025 * Base class for {@link TypeConverter} implementations. 026 * <p/> 027 * Implementators need only to implement the {@link TypeConverter#convertTo(Class, org.apache.camel.Exchange, Object)} 028 * method, and can rely on the default implementations of the other methods from this support class. 029 */ 030 public abstract class TypeConverterSupport implements TypeConverter { 031 032 @Override 033 public boolean allowNull() { 034 return false; 035 } 036 037 @Override 038 public <T> T convertTo(Class<T> type, Object value) throws TypeConversionException { 039 return convertTo(type, null, value); 040 } 041 042 @Override 043 public <T> T mandatoryConvertTo(Class<T> type, Object value) throws TypeConversionException, NoTypeConversionAvailableException { 044 T t = convertTo(type, null, value); 045 if (t == null) { 046 throw new NoTypeConversionAvailableException(value, type); 047 } else { 048 return t; 049 } 050 } 051 052 @Override 053 public <T> T mandatoryConvertTo(Class<T> type, Exchange exchange, Object value) throws TypeConversionException, NoTypeConversionAvailableException { 054 T t = convertTo(type, exchange, value); 055 if (t == null) { 056 throw new NoTypeConversionAvailableException(value, type); 057 } else { 058 return t; 059 } 060 } 061 062 @Override 063 public <T> T tryConvertTo(Class<T> type, Object value) { 064 try { 065 return convertTo(type, null, value); 066 } catch (Exception e) { 067 // ignore 068 } 069 return null; 070 } 071 072 @Override 073 public <T> T tryConvertTo(Class<T> type, Exchange exchange, Object value) { 074 try { 075 return convertTo(type, exchange, value); 076 } catch (Exception e) { 077 // ignore 078 } 079 return null; 080 } 081 }