EnhancedLineNumberFilter.java

/*
 * 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 java.util.regex.Pattern;


public class EnhancedLineNumberFilter implements Filter {
  private Pattern linePattern;
  private Pattern nativePattern;

  public EnhancedLineNumberFilter() {
      linePattern = Pattern.compile("\\(.*:\\d{1,4}\\)");
      nativePattern = Pattern.compile("\\(Native Method\\)");
  }

  public String filter(final String in) {

    if (linePattern.matcher(in).find()) {
        return linePattern.matcher(in).replaceAll("(X)");
    } else if (nativePattern.matcher(in).find()) {
        return nativePattern.matcher(in).replaceAll("(X)");
    } else {
      return in;
    }
  }
}