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<>();
059    private final Set<Class<?>> converters = new LinkedHashSet<>();
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        converters.add(UriTypeConverter.class);
081    }
082
083    @Override
084    public void setClassLoaders(Set<ClassLoader> classLoaders) {
085        // add all the class loaders
086        this.classLoaders.addAll(classLoaders);
087    }
088
089    @Override
090    public Set<ClassLoader> getClassLoaders() {
091        // return a new set to avoid any concurrency issues in other runtimes such as OSGi
092        return Collections.unmodifiableSet(new LinkedHashSet<>(classLoaders));
093    }
094
095    @Override
096    public void addClassLoader(ClassLoader classLoader) {
097        classLoaders.add(classLoader);
098    }
099
100    @Override
101    public Set<Class<?>> findAnnotated(Class<? extends Annotation> annotation, String... packageNames) {
102        return converters;
103    }
104
105    @Override
106    public Set<Class<?>> findAnnotated(Set<Class<? extends Annotation>> annotations, String... packageNames) {
107        return converters;
108    }
109
110    @Override
111    public Set<Class<?>> findImplementations(Class<?> parent, String... packageNames) {
112        // noop
113        return null;
114    }
115
116    @Override
117    public Set<Class<?>> findByFilter(PackageScanFilter filter, String... packageNames) {
118        // noop
119        return null;
120    }
121
122    @Override
123    public void addFilter(PackageScanFilter filter) {
124        // noop
125    }
126
127    @Override
128    public void removeFilter(PackageScanFilter filter) {
129        // noop
130    }
131}