    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.io.BufferedReader;
    21  import java.io.FileOutputStream;
    22  import java.io.FileReader;
    23  import java.io.IOException;
    24  import java.io.PrintStream;
    25
    26  public class Transformer {
    27
    28    public
    29    static
    30    void transform(String in, String out, Filter[] filters) throws IOException,
    31                                                                   UnexpectedFormatException {
    32
    33      String line;
    34      BufferedReader input = new BufferedReader(new FileReader(in));
    35      PrintStream output = new PrintStream(new FileOutputStream(out, false));
    36
    37      // Initialization of input and output omitted
    38      while((line = input.readLine()) != null) {
    39        // apply all filters
    40        for(int i = 0; i < filters.length; i++) {
    41  	line = filters[i].filter(line);
    42        }
    43        if(line != null) {
    44  	output.println(line);
    45        }
    46      }
    47    }
    48
    49
    50
    51    public
    52    static
    53    void transform(String in, String out, Filter filter) throws IOException,
    54                                                                UnexpectedFormatException {
    55
    56      String line;
    57      BufferedReader input = new BufferedReader(new FileReader(in));
    58      PrintStream output = new PrintStream(new FileOutputStream(out));
    59
    60      // Initialization of input and output omitted
    61      while((line = input.readLine()) != null) {
    62        line = filter.filter(line);
    63        output.println(line);
    64      }
    65    }
    66
    67  }