1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.log4j.util;
19  
20  import java.util.regex.Pattern;
21  
22  
23  public class EnhancedLineNumberFilter implements Filter {
24    private Pattern linePattern;
25    private Pattern nativePattern;
26  
27    public EnhancedLineNumberFilter() {
28        linePattern = Pattern.compile("\\(.*:\\d{1,4}\\)");
29        nativePattern = Pattern.compile("\\(Native Method\\)");
30    }
31  
32    public String filter(final String in) {
33  
34      if (linePattern.matcher(in).find()) {
35          return linePattern.matcher(in).replaceAll("(X)");
36      } else if (nativePattern.matcher(in).find()) {
37          return nativePattern.matcher(in).replaceAll("(X)");
38      } else {
39        return in;
40      }
41    }
42  }