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.beans.PropertyEditor; 020import java.beans.PropertyEditorManager; 021import java.util.HashMap; 022import java.util.Map; 023 024import org.apache.camel.Exchange; 025import org.apache.camel.TypeConverter; 026import org.apache.camel.util.LRUCacheFactory; 027import org.apache.camel.util.ObjectHelper; 028import org.slf4j.Logger; 029import org.slf4j.LoggerFactory; 030 031/** 032 * Uses the {@link java.beans.PropertyEditor} conversion system to convert Objects to 033 * and from String values. 034 * 035 * @deprecated should be removed as it can cause side-effects when using 3rd party property editors 036 * 037 * @version 038 */ 039@Deprecated 040public class PropertyEditorTypeConverter implements TypeConverter { 041 042 private static final Logger LOG = LoggerFactory.getLogger(PropertyEditorTypeConverter.class); 043 // use a soft bound cache to avoid using too much memory in case a lot of different classes 044 // is being converted to string 045 @SuppressWarnings("unchecked") 046 private final Map<Class<?>, Class<?>> misses = LRUCacheFactory.newLRUSoftCache(1000); 047 // we don't anticipate so many property editors so we have unbounded map 048 private final Map<Class<?>, PropertyEditor> cache = new HashMap<>(); 049 050 public void clear() { 051 cache.clear(); 052 misses.clear(); 053 } 054 055 @Override 056 public boolean allowNull() { 057 return false; 058 } 059 060 @Override 061 public <T> T convertTo(Class<T> type, Object value) { 062 // We can't convert null values since we can't figure out a property 063 // editor for it. 064 if (value == null) { 065 return null; 066 } 067 068 if (value.getClass() == String.class) { 069 // No conversion needed. 070 if (type == String.class) { 071 return ObjectHelper.cast(type, value); 072 } 073 074 Class<?> key = type; 075 PropertyEditor editor = lookupEditor(key); 076 if (editor != null) { 077 // we are essentially not thread safe as we use 2 calls to convert 078 editor.setAsText(value.toString()); 079 return ObjectHelper.cast(type, editor.getValue()); 080 } 081 } else if (type == String.class) { 082 Class<?> key = value.getClass(); 083 PropertyEditor editor = lookupEditor(key); 084 if (editor != null) { 085 // we are essentially not thread safe as we use 2 calls to convert 086 editor.setValue(value); 087 return ObjectHelper.cast(type, editor.getAsText()); 088 } 089 } 090 091 return null; 092 } 093 094 private PropertyEditor lookupEditor(Class<?> type) { 095 // check misses first 096 if (misses.containsKey(type)) { 097 LOG.trace("No previously found property editor for type: {}", type); 098 return null; 099 } 100 101 synchronized (cache) { 102 // not a miss then try to lookup the editor 103 PropertyEditor editor = cache.get(type); 104 if (editor == null) { 105 // findEditor is synchronized and very slow so we want to only lookup once for a given key 106 // and then we use our own local cache for faster lookup 107 editor = PropertyEditorManager.findEditor(type); 108 109 // either we found an editor, or if not then register it as a miss 110 if (editor != null) { 111 LOG.trace("Found property editor for type: {} -> {}", type, editor); 112 cache.put(type, editor); 113 } else { 114 LOG.trace("Cannot find property editor for type: {}", type); 115 misses.put(type, type); 116 } 117 } 118 return editor; 119 } 120 } 121 122 @Override 123 public <T> T convertTo(Class<T> type, Exchange exchange, Object value) { 124 return convertTo(type, value); 125 } 126 127 @Override 128 public <T> T mandatoryConvertTo(Class<T> type, Object value) { 129 return convertTo(type, value); 130 } 131 132 @Override 133 public <T> T mandatoryConvertTo(Class<T> type, Exchange exchange, Object value) { 134 return convertTo(type, value); 135 } 136 137 @Override 138 public <T> T tryConvertTo(Class<T> type, Exchange exchange, Object value) { 139 try { 140 return convertTo(type, exchange, value); 141 } catch (Exception e) { 142 return null; 143 } 144 } 145 146 @Override 147 public <T> T tryConvertTo(Class<T> type, Object value) { 148 try { 149 return convertTo(type, null, value); 150 } catch (Exception e) { 151 return null; 152 } 153 } 154}