/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

/* $Id: JavaFilenameFilter.java 416058 2006-06-21 18:24:05Z andreas $  */

package org.apache.lenya.cms.ant;

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.StringTokenizer;

/**
 * A filename filter for .java, .properties, .xml and .xsl files
 * FIXME this class is named badly
 */
public class JavaFilenameFilter implements FilenameFilter {
    
    private static final String[] SUFFIXES = { "java", "properties", "xml", "xsl" };

	/**
	 * @see java.io.FilenameFilter#accept(java.io.File, java.lang.String)
	 */
    public boolean accept(File dir, String name) {
        boolean accept = true;
        if (new File(dir, name).isFile()) {
            String suffix = getExtension(name);
            if (!Arrays.asList(SUFFIXES).contains(suffix)) {
                accept = false;
            }
        }
        return accept;
    }

	/**
	 * Get the extension
	 * @param filename the file name from which the extension is extracted
	 * @return the extension
	 */
    static public String getExtension(String filename) {
        StringTokenizer st = new StringTokenizer(filename, ".");
        st.nextToken();

        String extension = "";

        while (st.hasMoreTokens()) {
            extension = st.nextToken();
        }

        return extension;
    }
}