LineConverter xref

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    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  }