source: trunk/org.etsi.common/src/org/etsi/common/ExtensionFilter.java @ 7

package org.etsi.common;

import java.io.File;
import java.io.FileFilter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ExtensionFilter implements FileFilter {

        private String extRegExp = "";

        public ExtensionFilter(String extRegExp) {
                this.extRegExp = extRegExp;
        }

        public static String getFileExtension(String filename) {
                String ext = "";
                new File(filename);
                int i = filename.lastIndexOf('.');
                if (i > 0 && i < filename.length() - 1) {
                        ext = filename.substring(i + 1).toLowerCase();
                }
                return ext;
        }

        public static boolean checkFileExtension(File file, String regExp){
                Pattern extPattern = Pattern.compile(regExp);
                Matcher extMatcher = extPattern.matcher(getFileExtension(file.getName()));
                        if (extMatcher.matches()) {
                                return true;
                        }

                return false;
        }
        
        public boolean accept(File filename) {
                if (filename.isFile()) {
                        if (checkFileExtension(filename, this.extRegExp)) {
                                return true;
                        }
                }
                return false;
        }

}