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1   /*
2    * Copyright 2004 Diogo Quintela (dquintela@users.sourceforge.net)
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package net.sf.whatsnew.filter.impl;
17  
18  import java.util.ArrayList;
19  import java.util.List;
20  
21  import net.sf.whatsnew.exceptions.AppException;
22  import net.sf.whatsnew.filter.Filter;
23  import net.sf.whatsnew.filter.util.StringUtils;
24  
25  
26  /***
27   * <p>
28   * An Filter implementation which removes tabs and substitutes with spaces
29   * </p>
30   *
31   * @author <a href="mailto:dquintela@users.sourceforge.net">Diogo Quintela</a>
32   * @version $Id: TabsToSpacesFilter.java,v 1.1 2004/05/13 01:22:35 dquintela Exp $
33   */
34  public class TabsToSpacesFilter
35  implements Filter {
36      /***
37       * Process an array of Strings
38       *
39       * @param input The array to process
40       *
41       * @return The filtered output
42       *
43       * @throws AppException in case of error 
44       */
45      public String[] filter(String[] input)
46      throws AppException {
47          List retVal = new ArrayList();
48  
49          for (int i = 0; i < input.length; i++) {
50              retVal.add(StringUtils.expandTabs(input[i], 4));
51          }
52  
53          return (String[]) retVal.toArray(new String[0]);
54      }
55  }
56  // EOF