/*
 * 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.
 */
package org.apache.parquet.hadoop.util;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;

public class HiddenFileFilter implements PathFilter {
  public static final HiddenFileFilter INSTANCE = new HiddenFileFilter();

  private HiddenFileFilter() {}

  @Override
  public boolean accept(Path p) {
    return !p.getName().startsWith("_") && !p.getName().startsWith(".");
  }
}

@@ -917,16 +917,235 @@
 ilter;%0A%0A
+/**%0A * A %7B@link PathFilter%7D that filters out hidden files. A file is considered to%0A * be hidden, and should not be considered for processing, when the file name%0A * starts with a period ('.') or an underscore ('_').%0A */%0A
 public c
@@ -1352,75 +1352,77 @@
     
-return !p.getName().startsWith(%22_%22) && !p.getName().startsWith(%22.%22)
+final char c = p.getName().charAt(0);%0A    return c != '.' && c != '_'
 ;%0A  

Update HiddenFileFilter to avoid extra startsWith (#606)