content: /*
   * JBoss, Home of Professional Open Source
   * Copyright 2014 Red Hat Inc. and/or its affiliates and other contributors
   * as indicated by the @authors tag. All rights reserved.
   * See the copyright.txt in the distribution for a
   * full listing of individual contributors.
   *
   * Licensed 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.aesh.comparators;
  
  import org.aesh.constants.AeshConstants;
  
  import java.util.Comparator;
  
  /**
   * @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
   * @author <a href="mailto:danielsoro@gmail.com">Daniel Cunha (soro)</a>
   * @author <a href="mailto:robert@balent.cz">Robert Balent</a>
   *
   */
  public class PosixFileNameComparator implements Comparator<String> {
      @Override
      public int compare(String o1, String o2) {
          String o1WithoutDot = o1;
          String o2WithoutDot = o2;
  
          if (o1.indexOf(AeshConstants.DOT) == 0) {
              o1WithoutDot = o1.substring(1);
          }
          if (o2.indexOf(AeshConstants.DOT) == 0) {
              o2WithoutDot = o2.substring(1);
          }
  
          // if names are same when removed dot, make without dot first
          // if names are same when ignored case, make lower case first (by default compareTo returns upper case first)
          if (o1WithoutDot.compareTo(o2WithoutDot) == 0) {
              return o2.compareTo(o1);
          } else if (o1WithoutDot.compareToIgnoreCase(o2WithoutDot) == 0) {
              return o2WithoutDot.compareTo(o1WithoutDot);
          } else {
              return o1WithoutDot.compareToIgnoreCase(o2WithoutDot);
          }
      }
  }
  