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.util;
018
019 import java.lang.reflect.Method;
020 import java.util.ArrayList;
021 import java.util.Collections;
022 import java.util.Comparator;
023 import java.util.List;
024
025 import org.apache.camel.TypeConverter;
026 import org.apache.camel.impl.converter.AnnotationTypeConverterLoader;
027 import org.apache.camel.impl.converter.TypeConverterRegistry;
028 import static org.apache.camel.util.ObjectHelper.equal;
029
030 public class ReportingTypeConverterLoader extends AnnotationTypeConverterLoader {
031
032 private static final Comparator<TypeMapping> COMPARE_LAST_LOADED_FIRST = new Comparator<TypeMapping>() {
033 public int compare(TypeMapping t1, TypeMapping t2) {
034 if (equal(t1.fromType, t2.fromType)) {
035 return equal(t1.toType, t2.toType) ? t1.index - t2.index : ObjectHelper
036 .compare(getTypeName(t1.toType), getTypeName(t2.toType));
037 }
038 return ObjectHelper.compare(getTypeName(t1.fromType), getTypeName(t2.fromType));
039 }
040
041 };
042 private List<TypeMapping> typeMappings = new ArrayList<TypeMapping>();
043
044 public TypeMapping[] getTypeConversions() {
045 Collections.sort(typeMappings, COMPARE_LAST_LOADED_FIRST);
046 return typeMappings.toArray(new TypeMapping[typeMappings.size()]);
047 }
048
049 protected void registerTypeConverter(TypeConverterRegistry registry, Method method, Class toType,
050 Class fromType, TypeConverter typeConverter) {
051
052 TypeMapping mapping = new TypeMapping(toType, fromType, typeConverter.getClass(), method);
053 typeMappings.add(mapping);
054 }
055
056 private static String getTypeName(Class type) {
057 return type != null ? type.getName() : null;
058 }
059
060 /**
061 * Represents a mapping from one type (which can be null) to another
062 */
063 public static class TypeMapping {
064 private static int counter;
065 Class toType;
066 Class fromType;
067 Class converterType;
068 Method method;
069 int index;
070
071 public TypeMapping(Class toType, Class fromType, Class converterType, Method method) {
072 this.toType = toType;
073 this.fromType = fromType;
074 this.converterType = converterType;
075 this.method = method;
076 this.index = counter++;
077 }
078
079 public Class getFromType() {
080 return fromType;
081 }
082
083 public Class getToType() {
084 return toType;
085 }
086
087 public Class getConverterType() {
088 return converterType;
089 }
090
091 public Method getMethod() {
092 return method;
093 }
094
095 public int getIndex() {
096 return index;
097 }
098
099 @Override
100 public boolean equals(Object object) {
101 if (object instanceof TypeMapping) {
102 TypeMapping that = (TypeMapping)object;
103 return this.index == that.index;
104 }
105 return false;
106 }
107
108 @Override
109 public int hashCode() {
110 int answer = toType.hashCode();
111 if (fromType != null) {
112 answer *= 37 + fromType.hashCode();
113 }
114 return answer;
115 }
116
117 @Override
118 public String toString() {
119 return "[" + fromType.getSimpleName() + "=>" + toType.getSimpleName() + "]";
120 }
121 }
122 }