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.component.file;
018    
019    import java.lang.reflect.Method;
020    
021    import org.apache.camel.util.ObjectHelper;
022    import static org.apache.camel.util.CollectionHelper.collectionAsCommaDelimitedString;
023    
024    /**
025     * File filter using Spring's AntPathMatcher.
026     * <p/>
027     * Exclude take precedence over includes. If a file match both exclude and include it will be regarded as excluded.
028     */
029    public class AntPathMatcherGenericFileFilter implements GenericFileFilter {
030        private static final String ANTPATHMATCHER_CLASSNAME = "org.apache.camel.spring.util.SpringAntPathMatcherFileFilter";
031    
032        private String[] excludes;
033        private String[] includes;
034    
035        private Object filter;
036        private Method includesMethod;
037        private Method excludesMethod;
038        private Method acceptsMethod;
039    
040        public boolean accept(GenericFile file) {
041            try {
042                synchronized (this) {
043                    if (filter == null) {
044                        init();
045                    }
046                }
047    
048                // invoke setIncludes(String), must using string type as invoking with string[] does not work
049                ObjectHelper.invokeMethod(includesMethod, filter, collectionAsCommaDelimitedString(includes));
050    
051                // invoke setExcludes(String), must using string type as invoking with string[] does not work
052                ObjectHelper.invokeMethod(excludesMethod, filter, collectionAsCommaDelimitedString(excludes));
053    
054                // invoke acceptPathName(String)
055                String path = file.getRelativeFilePath();
056                return (Boolean) ObjectHelper.invokeMethod(acceptsMethod, filter, path);
057    
058            } catch (NoSuchMethodException e) {
059                throw new TypeNotPresentException(ANTPATHMATCHER_CLASSNAME, e);
060            }
061        }
062    
063        @SuppressWarnings("unchecked")
064        private void init() throws NoSuchMethodException {
065            // we must use reflection to invoke the AntPathMatcherFileFilter that reside in camel-spring.jar
066            // and we don't want camel-ftp to have runtime dependency on camel-spring.jar
067            Class clazz = ObjectHelper.loadClass(ANTPATHMATCHER_CLASSNAME);
068            ObjectHelper.notNull(clazz, ANTPATHMATCHER_CLASSNAME + " not found in classpath. camel-spring.jar is required in the classpath.");
069    
070            filter = ObjectHelper.newInstance(clazz);
071    
072            includesMethod = filter.getClass().getMethod("setIncludes", String.class);
073            excludesMethod = filter.getClass().getMethod("setExcludes", String.class);
074            acceptsMethod = filter.getClass().getMethod("acceptPathName", String.class);
075        }
076    
077        public String[] getExcludes() {
078            return excludes;
079        }
080    
081        public void setExcludes(String[] excludes) {
082            this.excludes = excludes;
083        }
084    
085        public String[] getIncludes() {
086            return includes;
087        }
088    
089        public void setIncludes(String[] includes) {
090            this.includes = includes;
091        }
092    
093        /**
094         * Sets excludes using a single string where each element can be separated with comma
095         */
096        public void setExcludes(String excludes) {
097            setExcludes(excludes.split(","));
098        }
099    
100        /**
101         * Sets includes using a single string where each element can be separated with comma
102         */
103        public void setIncludes(String includes) {
104            setIncludes(includes.split(","));
105        }
106    
107    }