    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  }