Clover coverage report - Code Coverage for hivemind release 1.1-alpha-3
Coverage timestamp: Tue Mar 22 2005 09:10:26 EST
file stats: LOC: 169   Methods: 6
NCLOC: 102   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
MethodPatternParser.java 100% 100% 100% 100%
coverage
 1   
 // Copyright 2004, 2005 The Apache Software Foundation
 2   
 //
 3   
 // Licensed under the Apache License, Version 2.0 (the "License");
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 // you may not use this file except in compliance with the License.
 5   
 // You may obtain a copy of the License at
 6   
 //
 7   
 //     http://www.apache.org/licenses/LICENSE-2.0
 8   
 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
 11   
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12   
 // See the License for the specific language governing permissions and
 13   
 // limitations under the License.
 14   
 
 15   
 package org.apache.hivemind.methodmatch;
 16   
 
 17   
 import java.util.ArrayList;
 18   
 import java.util.List;
 19   
 
 20   
 import org.apache.hivemind.ApplicationRuntimeException;
 21   
 import org.apache.hivemind.util.StringUtils;
 22   
 
 23   
 /**
 24   
  * Parses a method pattern (consisting of a name pattern, followed by an optional parameters
 25   
  * pattern) into a {@link org.apache.hivemind.methodmatch.MethodFilter}. In most cases, the
 26   
  * patterns will require several checks (i.e., match against name, match against parameters) in
 27   
  * which case a {@link org.apache.hivemind.methodmatch.CompositeFilter} is returned.
 28   
  * 
 29   
  * @author Howard Lewis Ship
 30   
  */
 31   
 
 32   
 public class MethodPatternParser
 33   
 {
 34   
     private List _filters;
 35   
 
 36  20
     public MethodFilter parseMethodPattern(String pattern)
 37   
     {
 38  20
         _filters = new ArrayList();
 39   
 
 40  20
         int parenx = pattern.indexOf('(');
 41   
 
 42  20
         String namePattern = parenx < 0 ? pattern : pattern.substring(0, parenx);
 43   
 
 44  20
         parseNamePattern(pattern, namePattern);
 45   
 
 46  18
         if (parenx >= 0)
 47  9
             parseParametersPattern(pattern, pattern.substring(parenx));
 48   
 
 49  14
         switch (_filters.size())
 50   
         {
 51   
             case 0:
 52  2
                 return new MatchAllFilter();
 53   
 
 54   
             case 1:
 55   
 
 56  9
                 return (MethodFilter) _filters.get(0);
 57   
 
 58   
             default:
 59  3
                 return new CompositeFilter(_filters);
 60   
         }
 61   
     }
 62   
 
 63  20
     private void parseNamePattern(String methodPattern, String namePattern)
 64   
     {
 65  20
         if (namePattern.equals("*"))
 66  8
             return;
 67   
 
 68  12
         if (namePattern.length() == 0)
 69  1
             throw new ApplicationRuntimeException(MethodMatchMessages
 70   
                     .missingNamePattern(methodPattern));
 71   
 
 72  11
         if (namePattern.startsWith("*") && namePattern.endsWith("*"))
 73   
         {
 74  2
             String substring = namePattern.substring(1, namePattern.length() - 1);
 75   
 
 76  2
             validateNamePattern(methodPattern, substring);
 77   
 
 78  1
             _filters.add(new InfixNameFilter(substring));
 79  1
             return;
 80   
         }
 81   
 
 82  9
         if (namePattern.startsWith("*"))
 83   
         {
 84  2
             String suffix = namePattern.substring(1);
 85   
 
 86  2
             validateNamePattern(methodPattern, suffix);
 87   
 
 88  2
             _filters.add(new NameSuffixFilter(suffix));
 89  2
             return;
 90   
         }
 91   
 
 92  7
         if (namePattern.endsWith("*"))
 93   
         {
 94  3
             String prefix = namePattern.substring(0, namePattern.length() - 1);
 95   
 
 96  3
             validateNamePattern(methodPattern, prefix);
 97   
 
 98  3
             _filters.add(new NamePrefixFilter(prefix));
 99  3
             return;
 100   
         }
 101   
 
 102  4
         validateNamePattern(methodPattern, namePattern);
 103   
 
 104  4
         _filters.add(new ExactNameFilter(namePattern));
 105   
     }
 106   
 
 107  9
     private void parseParametersPattern(String methodPattern, String pattern)
 108   
     {
 109  9
         if (pattern.equals("()"))
 110   
         {
 111  1
             addParameterCountFilter(0);
 112  1
             return;
 113   
         }
 114   
 
 115  8
         if (!pattern.endsWith(")"))
 116  3
             throw new ApplicationRuntimeException(MethodMatchMessages
 117   
                     .invalidParametersPattern(methodPattern));
 118   
 
 119   
         // Trim off leading and trailing parens.
 120   
 
 121  5
         pattern = pattern.substring(1, pattern.length() - 1);
 122   
 
 123  5
         char ch = pattern.charAt(0);
 124   
 
 125  5
         if (Character.isDigit(ch))
 126   
         {
 127  2
             addParameterCountFilter(methodPattern, pattern);
 128  1
             return;
 129   
         }
 130   
 
 131  3
         String[] names = StringUtils.split(pattern);
 132   
 
 133   
         // Would be nice to do some kind of validation here, to prove
 134   
         // that the provided class names exist, and that
 135   
         // primitive types names are valid.
 136   
 
 137  3
         addParameterCountFilter(names.length);
 138  3
         for (int i = 0; i < names.length; i++)
 139  4
             _filters.add(new ParameterFilter(i, names[i].trim()));
 140   
 
 141   
     }
 142   
 
 143  2
     private void addParameterCountFilter(String methodPattern, String pattern)
 144   
     {
 145  2
         try
 146   
         {
 147  2
             int count = Integer.parseInt(pattern);
 148  1
             addParameterCountFilter(count);
 149   
         }
 150   
         catch (NumberFormatException ex)
 151   
         {
 152  1
             throw new ApplicationRuntimeException(MethodMatchMessages
 153   
                     .invalidParametersPattern(methodPattern));
 154   
         }
 155   
     }
 156   
 
 157  5
     private void addParameterCountFilter(int count)
 158   
     {
 159   
         // Add the count filter first, since it is always the least expensive test.
 160  5
         _filters.add(0, new ParameterCountFilter(count));
 161   
     }
 162   
 
 163  11
     private void validateNamePattern(String methodPattern, String nameSubstring)
 164   
     {
 165  11
         if (nameSubstring.indexOf('*') >= 0)
 166  1
             throw new ApplicationRuntimeException(MethodMatchMessages
 167   
                     .invalidNamePattern(methodPattern));
 168   
     }
 169   
 }