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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;
    26
    27  import java.util.regex.Matcher;
    28  import java.util.regex.Pattern;
    29
    30  import org.slf4j.migrator.line.MultiGroupConversionRule;
    31
    32  import junit.framework.TestCase;
    33
    34  public class AternativeApproach extends TestCase {
    35
    36      /**
    37       * In this test we see that we cans use more simple Pattern to do the
    38       * conversion
    39       *
    40       */
    41      public void test() {
    42          MultiGroupConversionRule cr2 = new MultiGroupConversionRule(Pattern.compile("(.*)(Log)"));
    43          cr2.addReplacement(2, "LOGGER");
    44
    45          String s = "abcd Log";
    46          Pattern pat = cr2.getPattern();
    47          Matcher m = pat.matcher(s);
    48
    49          assertTrue(m.matches());
    50          String r = cr2.replace(m);
    51          assertEquals("abcd LOGGER", r);
    52
    53          System.out.println(r);
    54      }
    55
    56      /**
    57       * In this test we replace, using the simple Pattern (Log), the full Log
    58       * declaration and instantiation. This is not convenient because we will also
    59       * replace all String containing "Log".
    60       */
    61      public void test2() {
    62          Pattern pat = Pattern.compile("(Log)");
    63          String s = "abcd Log =";
    64          Matcher m = pat.matcher(s);
    65          assertTrue(m.find());
    66          String r = m.replaceAll("Logger");
    67          assertEquals("abcd Logger =", r);
    68
    69          String s1 = "Log l = LogFactory.getLog(MyClass.class);";
    70          m = pat.matcher(s1);
    71          assertTrue(m.find());
    72          r = m.replaceAll("Logger");
    73          assertEquals("Logger l = LoggerFactory.getLogger(MyClass.class);", r);
    74
    75          String s2 = "Logabc ";
    76          m = pat.matcher(s2);
    77          assertTrue(m.find());
    78
    79          String s3 = "abcLog";
    80          m = pat.matcher(s3);
    81          assertTrue(m.find());
    82      }
    83
    84      /**
    85       * In this test we use a simple Pattern to replace the log instantiation
    86       * without influence on Log declaration.
    87       *
    88       */
    89      public void test3() {
    90          Pattern pat = Pattern.compile("LogFactory.getFactory\\(\\).getInstance\\(");
    91          String s = "Log log =  LogFactory.getFactory().getInstance(\"x\");";
    92          Matcher m = pat.matcher(s);
    93          assertTrue(m.find());
    94          String r = m.replaceAll("LoggerFactory.getLogger(");
    95          assertEquals("Log log =  LoggerFactory.getLogger(\"x\");", r);
    96
    97          String nonMatching = "Log log = xxx;";
    98          pat.matcher(nonMatching);
    99          assertFalse(m.find());
    100     }
    101
    102     /**
    103      * In this test we try to replace keyword Log without influence on String
    104      * containing Log We see that we have to use two different Patterns
    105      */
    106     public void test4() {
    107         Pattern pat = Pattern.compile("(\\sLog\\b)");
    108         String s = "abcd Log =";
    109         Matcher m = pat.matcher(s);
    110         assertTrue(m.find());
    111         String r = m.replaceAll(" Logger");
    112         assertEquals("abcd Logger =", r);
    113
    114         String s2 = "Logabcd ";
    115         m = pat.matcher(s2);
    116         assertFalse(m.find());
    117
    118         String s3 = "abcdLogabcd ";
    119         m = pat.matcher(s3);
    120         assertFalse(m.find());
    121
    122         String s4 = "abcdLog";
    123         m = pat.matcher(s4);
    124         assertFalse(m.find());
    125
    126         String s5 = "Log myLog";
    127         m = pat.matcher(s5);
    128         assertFalse(m.find());
    129
    130         Pattern pat2 = Pattern.compile("^Log\\b");
    131         Matcher m2 = pat2.matcher(s5);
    132         assertTrue(m2.find());
    133         r = m2.replaceAll("Logger");
    134         assertEquals("Logger myLog", r);
    135     }
    136
    137     /**
    138      * In this test we combine two Pattern to achieve the intended conversion
    139      */
    140     public void test5() {
    141         Pattern pat = Pattern.compile("(\\sLog\\b)");
    142         String s = "public Log myLog =LogFactory.getFactory().getInstance(myClass.class);";
    143         Matcher m = pat.matcher(s);
    144         assertTrue(m.find());
    145         String r = m.replaceAll(" Logger");
    146         assertEquals("public Logger myLog =LogFactory.getFactory().getInstance(myClass.class);", r);
    147
    148         Pattern pat2 = Pattern.compile("LogFactory.getFactory\\(\\).getInstance\\(");
    149         m = pat2.matcher(r);
    150         assertTrue(m.find());
    151         r = m.replaceAll("LoggerFactory.getLogger(");
    152         assertEquals("public Logger myLog =LoggerFactory.getLogger(myClass.class);", r);
    153     }
    154 }