View Javadoc

1   /**
2    * Copyright (c) 2004-2011 QOS.ch
3    * All rights reserved.
4    *
5    * Permission is hereby granted, free  of charge, to any person obtaining
6    * a  copy  of this  software  and  associated  documentation files  (the
7    * "Software"), to  deal in  the Software without  restriction, including
8    * without limitation  the rights to  use, copy, modify,  merge, publish,
9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10   * permit persons to whom the Software  is furnished to do so, subject to
11   * the following conditions:
12   *
13   * The  above  copyright  notice  and  this permission  notice  shall  be
14   * included in all copies or substantial portions of the Software.
15   *
16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23   *
24   */
25  package org.slf4j.migrator.line;
26  
27  import java.util.Arrays;
28  import java.util.Iterator;
29  import java.util.regex.Matcher;
30  import java.util.regex.Pattern;
31  
32  
33  public class LineConverter {
34  
35    final RuleSet ruleSet;
36    boolean atLeastOneMatchOccured = false;
37    
38    public LineConverter(RuleSet ruleSet) {
39      this.ruleSet = ruleSet;
40    }
41  
42    /**
43     * Check if the specified text is matching some conversions rules. 
44     * If a rule matches, ask for line replacement.
45     * 
46     * <p>In case no rule can be applied, then the input text is
47     * returned without change.
48     * 
49     * @param text
50     * @return String
51     */
52    public String[] getReplacement(String text) {
53      ConversionRule conversionRule;
54      Pattern pattern;
55      Matcher matcher;
56      Iterator<ConversionRule> conversionRuleIterator = ruleSet.iterator();
57      String additionalLine = null;
58      while (conversionRuleIterator.hasNext()) {
59        conversionRule = conversionRuleIterator.next();
60        pattern = conversionRule.getPattern();
61        matcher = pattern.matcher(text);
62        if (matcher.find()) {
63          // System.out.println("matching " + text);
64          atLeastOneMatchOccured = true;
65          String replacementText = conversionRule.replace(matcher);
66          text = matcher.replaceAll(replacementText);
67          if(conversionRule.getAdditionalLine() != null) {
68            additionalLine = conversionRule.getAdditionalLine();
69          }
70        }
71      }
72      
73      if(additionalLine == null) {
74        return new String[] {text};
75      } else {
76        return new String[] {text, additionalLine};
77      }
78    }
79  
80    public String getOneLineReplacement(String text) {
81      String[] r = getReplacement(text);
82      if(r.length != 1) {
83        throw new IllegalStateException("Expecting a single string but got "+Arrays.toString(r));
84      } else {
85        return r[0];
86      }
87    }
88    public boolean atLeastOneMatchOccured() {
89      return atLeastOneMatchOccured;
90    }
91  }