    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 org.apache.oro.text.perl.Perl5Util;
    21
    22  public class ControlFilter implements Filter {
    23
    24    Perl5Util util = new Perl5Util();
    25
    26    String[] allowedPatterns;
    27
    28    public ControlFilter(String[] allowedPatterns) {
    29      this.allowedPatterns = allowedPatterns;
    30    }
    31
    32    public
    33    String filter(String in) throws UnexpectedFormatException{
    34      int len = allowedPatterns.length;
    35      for(int i = 0; i < len; i++) {
    36        //System.out.println("["+allowedPatterns[i]+"]");
    37        if(util.match("/"+allowedPatterns[i]+"/", in)) {
    38  	//System.out.println("["+in+"] matched ["+allowedPatterns[i]);
    39  	return in;
    40        }
    41      }
    42
    43      throw new UnexpectedFormatException("["+in+"]");
    44    }
    45  }