package jhplot.utils;

import java.io.*;
import javax.swing.filechooser.FileFilter;


/**
 * File filters
 * @author S.Chekanov
 *
 */


public class ExtensionFileFilter extends FileFilter {
                String description;

                String extensions[];

                public ExtensionFileFilter(String description, String extension) {
                        this(description, new String[] { extension });
                }

                public ExtensionFileFilter(String description, String extensions[]) {
                        if (description == null) {
                                this.description = extensions[0];
                        } else {
                                this.description = description;
                        }
                        this.extensions = (String[]) extensions.clone();
                        toLower(this.extensions);
                }

                private void toLower(String array[]) {
                        for (int i = 0, n = array.length; i < n; i++) {
                                array[i] = array[i].toLowerCase();
                        }
                }

                public String getDescription() {
                        return description;
                }

                public boolean accept(File file) {
                        if (file.isDirectory()) {
                                return true;
                        } else {
                                String path = file.getAbsolutePath().toLowerCase();
                                for (int i = 0, n = extensions.length; i < n; i++) {
                                        String extension = extensions[i];
                                        if ((path.endsWith(extension) && (path.charAt(path.length()
                                                        - extension.length() - 1)) == '.')) {
                                                return true;
                                        }
                                }
                        }
                        return false;
                }
        }