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.lang.annotation.Annotation;
020import java.util.Collections;
021import java.util.LinkedHashSet;
022import java.util.Set;
023
024import org.apache.camel.component.bean.BeanConverter;
025import org.apache.camel.component.file.GenericFileConverter;
026import org.apache.camel.converter.AttachmentConverter;
027import org.apache.camel.converter.CamelConverter;
028import org.apache.camel.converter.CollectionConverter;
029import org.apache.camel.converter.DateTimeConverter;
030import org.apache.camel.converter.DurationConverter;
031import org.apache.camel.converter.IOConverter;
032import org.apache.camel.converter.NIOConverter;
033import org.apache.camel.converter.ObjectConverter;
034import org.apache.camel.converter.SQLConverter;
035import org.apache.camel.converter.TimePatternConverter;
036import org.apache.camel.converter.jaxp.DomConverter;
037import org.apache.camel.converter.jaxp.StaxConverter;
038import org.apache.camel.converter.jaxp.StreamSourceConverter;
039import org.apache.camel.converter.jaxp.XmlConverter;
040import org.apache.camel.converter.stream.StreamCacheConverter;
041import org.apache.camel.spi.PackageScanClassResolver;
042import org.apache.camel.spi.PackageScanFilter;
043import org.slf4j.Logger;
044import org.slf4j.LoggerFactory;
045
046/**
047 * A {@link org.apache.camel.spi.ClassResolver} which loads type converters
048 * from a hardcoded list of classes.
049 * <p/>
050 * <b>Important:</b> Whenever a new type converter class is added to camel-core
051 * then the class should be added to the list in this class.
052 *
053 * @see CoreTypeConverterLoader
054 */
055public class CorePackageScanClassResolver implements PackageScanClassResolver {
056
057    protected final Logger log = LoggerFactory.getLogger(getClass());
058    private final Set<ClassLoader> classLoaders = new LinkedHashSet<ClassLoader>();
059    private final Set<Class<?>> converters = new LinkedHashSet<Class<?>>();
060
061    public CorePackageScanClassResolver() {
062        converters.add(ObjectConverter.class);
063        converters.add(CollectionConverter.class);
064        converters.add(DateTimeConverter.class);
065        converters.add(SQLConverter.class);
066        converters.add(IOConverter.class);
067        converters.add(NIOConverter.class);
068        converters.add(StaxConverter.class);
069        converters.add(DomConverter.class);
070        converters.add(StreamSourceConverter.class);
071        converters.add(XmlConverter.class);
072        converters.add(CamelConverter.class);
073        converters.add(StreamCacheConverter.class);
074        converters.add(TimePatternConverter.class);
075        converters.add(FutureTypeConverter.class);
076        converters.add(BeanConverter.class);
077        converters.add(GenericFileConverter.class);
078        converters.add(DurationConverter.class);
079        converters.add(AttachmentConverter.class);
080    }
081
082    @Override
083    public void setClassLoaders(Set<ClassLoader> classLoaders) {
084        // add all the class loaders
085        this.classLoaders.addAll(classLoaders);
086    }
087
088    @Override
089    public Set<ClassLoader> getClassLoaders() {
090        // return a new set to avoid any concurrency issues in other runtimes such as OSGi
091        return Collections.unmodifiableSet(new LinkedHashSet<ClassLoader>(classLoaders));
092    }
093
094    @Override
095    public void addClassLoader(ClassLoader classLoader) {
096        classLoaders.add(classLoader);
097    }
098
099    @Override
100    public Set<Class<?>> findAnnotated(Class<? extends Annotation> annotation, String... packageNames) {
101        return converters;
102    }
103
104    @Override
105    public Set<Class<?>> findAnnotated(Set<Class<? extends Annotation>> annotations, String... packageNames) {
106        return converters;
107    }
108
109    @Override
110    public Set<Class<?>> findImplementations(Class<?> parent, String... packageNames) {
111        // noop
112        return null;
113    }
114
115    @Override
116    public Set<Class<?>> findByFilter(PackageScanFilter filter, String... packageNames) {
117        // noop
118        return null;
119    }
120
121    @Override
122    public void addFilter(PackageScanFilter filter) {
123        // noop
124    }
125
126    @Override
127    public void removeFilter(PackageScanFilter filter) {
128        // noop
129    }
130}