package japlot.jaxodraw;


import java.io.File;

import javax.swing.filechooser.FileFilter;

public class SimpleFileFilter extends FileFilter {
	String[] extensions;

	  String description;

	  public SimpleFileFilter(String ext) {
	    this(new String[] { ext }, null);
	  }

	  public SimpleFileFilter(String[] exts, String descr) {
	    // Clone and lowercase the extensions
	    extensions = new String[exts.length];
	    for (int i = exts.length - 1; i >= 0; i--) {
	      extensions[i] = exts[i].toLowerCase();
	    }
	    // Make sure we have a valid (if simplistic) description
	    description = (descr == null ? exts[0] + " files" : descr);
	  }

	  public boolean accept(File f) {
	    // We always allow directories, regardless of their extension
	    if (f.isDirectory()) {
	      return true;
	    }

	    // Ok, it's a regular file, so check the extension
	    String name = f.getName().toLowerCase();
	    for (int i = extensions.length - 1; i >= 0; i--) {
	      if (name.endsWith(extensions[i])) {
	        return true;
	      }
	    }
	    return false;
	  }

	  public String getDescription() {
	    return description;
	  }
}