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    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.FileNotFoundException;
    22  import java.io.FileOutputStream;
    23  import java.io.FileReader;
    24  import java.io.IOException;
    25  import java.io.PrintStream;
    26
    27  public class Transformer {
    28
    29    public
    30    static
    31    void transform(String in, String out, Filter[] filters) throws IOException,
    32                                                                   UnexpectedFormatException {
    33
    34      String line;
    35      BufferedReader input = new BufferedReader(new FileReader(in));
    36      PrintStream output = new PrintStream(new FileOutputStream(out, false));
    37
    38      // Initialization of input and output omitted
    39      while((line = input.readLine()) != null) {
    40        // apply all filters
    41        for(int i = 0; i < filters.length; i++) {
    42  	line = filters[i].filter(line);
    43        }
    44        if(line != null) {
    45  	output.println(line);
    46        }
    47      }
    48    }
    49
    50
    51
    52    public
    53    static
    54    void transform(String in, String out, Filter filter) throws IOException,
    55                                                                UnexpectedFormatException {
    56
    57      String line;
    58      BufferedReader input = new BufferedReader(new FileReader(in));
    59      PrintStream output = new PrintStream(new FileOutputStream(out));
    60
    61      // Initialization of input and output omitted
    62      while((line = input.readLine()) != null) {
    63        line = filter.filter(line);
    64        output.println(line);
    65      }
    66    }
    67
    68  }