/*
 * 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.log4j.util;

import org.apache.oro.text.perl.Perl5Util;

public class XMLLineAttributeFilter implements Filter {

  Perl5Util util = new Perl5Util();

  public 
  String filter(String in) {
    if(util.match("/line=\"\\d{1,3}\"/", in)) {
      return util.substitute("s/line=\"\\d{1,3}\"/line=\"X\"/", in);
    } else if(util.match("/line=\"?\"/", in)) {
      return util.substitute("s/line=\"?\"/line=\"X\"/", in);
    } else {
      return in;
    }
  }
}