Complex classes like MappingException often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use MappingException, and based on these observations, apply Extract Interface, too.
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17 | final class MappingException extends BaseMappingException |
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18 | { |
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19 | public static function typeExists(string $name) : self |
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23 | |||
24 | public static function typeNotFound(string $name) : self |
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28 | |||
29 | public static function typeRequirementsNotFulfilled(string $className, string $fieldName, string $type, string $reason) : self |
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30 | { |
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31 | return new self(sprintf("Can not use '%s' type for field '%s' in class '%s' as its requirements are not met: %s.", $fieldName, $className, $type, $reason)); |
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32 | } |
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33 | |||
34 | 6 | public static function mappingNotFound(string $className, string $fieldName) : self |
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35 | { |
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36 | 6 | return new self(sprintf("No mapping found for field '%s' in class '%s'.", $fieldName, $className)); |
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37 | } |
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38 | |||
39 | public static function referenceMappingNotFound(string $className, string $fieldName) : self |
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40 | { |
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41 | return new self(sprintf("No reference mapping found for field '%s' in class '%s'.", $fieldName, $className)); |
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42 | } |
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43 | |||
44 | 2 | public static function mappingNotFoundInClassNorDescendants(string $className, string $fieldName) : self |
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45 | { |
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46 | 2 | return new self(sprintf("No mapping found for field '%s' in class '%s' nor its descendants.", $fieldName, $className)); |
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47 | } |
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48 | |||
49 | 2 | public static function referenceFieldConflict(string $fieldName, string $className, string $className2) : self |
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50 | { |
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51 | 2 | return new self(sprintf("Reference mapping for field '%s' in class '%s' conflicts with one mapped in class '%s'.", $fieldName, $className, $className2)); |
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52 | } |
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53 | |||
54 | 2 | public static function mappingNotFoundByDbName(string $className, string $dbFieldName) : self |
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55 | { |
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56 | 2 | return new self(sprintf("No mapping found for field by DB name '%s' in class '%s'.", $dbFieldName, $className)); |
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57 | } |
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58 | |||
59 | public static function duplicateFieldMapping(string $document, string $fieldName) : self |
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60 | { |
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61 | return new self(sprintf('Property "%s" in "%s" was already declared, but it must be declared only once', $fieldName, $document)); |
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62 | } |
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63 | |||
64 | 2 | public static function duplicateDatabaseFieldName(string $document, string $offendingFieldName, string $databaseName, string $originalFieldName) : self |
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65 | { |
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66 | 2 | return new self(sprintf('Field "%s" in class "%s" is mapped to field "%s" in the database, but that name is already in use by field "%s".', $offendingFieldName, $document, $databaseName, $originalFieldName)); |
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67 | } |
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68 | |||
69 | 2 | public static function discriminatorFieldConflict(string $document, string $fieldName) : self |
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70 | { |
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71 | 2 | return new self(sprintf('Discriminator field "%s" in "%s" conflicts with a mapped field\'s "name" attribute.', $fieldName, $document)); |
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72 | } |
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73 | |||
74 | public static function invalidClassInDiscriminatorMap(string $className, string $owningClass) : self |
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75 | { |
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76 | return new self(sprintf("Document class '%s' used in the discriminator map of class '%s' does not exist.", $className, $owningClass)); |
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77 | } |
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78 | |||
79 | 16 | public static function unlistedClassInDiscriminatorMap(string $className) : self |
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80 | { |
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81 | 16 | return new self(sprintf('Document class "%s" is unlisted in the discriminator map.', $className)); |
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82 | } |
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83 | |||
84 | public static function invalidDiscriminatorValue(string $value, string $owningClass) : self |
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85 | { |
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86 | return new self(sprintf("Discriminator value '%s' used in the declaration of class '%s' does not exist.", $value, $owningClass)); |
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87 | } |
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88 | |||
89 | public static function missingFieldName(string $className) : self |
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90 | { |
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91 | return new self(sprintf("The Document class '%s' field mapping misses the 'fieldName' attribute.", $className)); |
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92 | } |
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93 | |||
94 | 4 | public static function classIsNotAValidDocument(string $className) : self |
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95 | { |
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96 | 4 | return new self(sprintf('Class %s is not a valid document or mapped super class.', $className)); |
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97 | } |
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98 | |||
99 | 6 | public static function classCanOnlyBeMappedByOneAbstractDocument(string $className, AbstractDocument $mappedAs, AbstractDocument $offending) : self |
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100 | { |
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101 | 6 | return new self(sprintf( |
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102 | 6 | "Can not map class '%s' as %s because it was already mapped as %s.", |
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103 | 6 | $className, |
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104 | 6 | (new ReflectionObject($offending))->getShortName(), |
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105 | 6 | (new ReflectionObject($mappedAs))->getShortName() |
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106 | )); |
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107 | } |
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108 | |||
109 | public static function reflectionFailure(string $document, ReflectionException $previousException) : self |
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110 | { |
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111 | return new self('An error occurred in ' . $document, 0, $previousException); |
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112 | } |
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113 | |||
114 | public static function identifierRequired(string $documentName) : self |
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115 | { |
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116 | return new self(sprintf("No identifier/primary key specified for Document '%s'. Every Document must have an identifier/primary key.", $documentName)); |
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117 | } |
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118 | |||
119 | public static function missingIdentifierField(string $className, string $fieldName) : self |
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120 | { |
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121 | return new self(sprintf('The identifier %s is missing for a query of %s', $fieldName, $className)); |
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122 | } |
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123 | |||
124 | public static function missingIdGeneratorClass(string $className) : self |
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125 | { |
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126 | return new self(sprintf('The class-option for the custom ID generator is missing in class %s.', $className)); |
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127 | } |
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128 | |||
129 | public static function classIsNotAValidGenerator(string $className) : self |
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130 | { |
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131 | return new self(sprintf('The class %s if not a valid ID generator of type AbstractIdGenerator.', $className)); |
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132 | } |
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133 | |||
134 | public static function missingGeneratorSetter(string $className, string $optionName) : self |
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135 | { |
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136 | return new self(sprintf('The class %s is missing a setter for the option %s.', $className, $optionName)); |
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137 | } |
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138 | |||
139 | 1 | public static function cascadeOnEmbeddedNotAllowed(string $className, string $fieldName) : self |
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140 | { |
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141 | 1 | return new self(sprintf('Cascade on %s::%s is not allowed.', $className, $fieldName)); |
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142 | } |
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143 | |||
144 | 3 | public static function simpleReferenceRequiresTargetDocument(string $className, string $fieldName) : self |
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145 | { |
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146 | 3 | return new self(sprintf('Target document must be specified for identifier reference: %s::%s', $className, $fieldName)); |
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147 | } |
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148 | |||
149 | 1 | public static function simpleReferenceMustNotTargetDiscriminatedDocument(string $targetDocument) : self |
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150 | { |
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151 | 1 | return new self(sprintf('Identifier reference must not target document using Single Collection Inheritance, %s targeted.', $targetDocument)); |
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152 | } |
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153 | |||
154 | 1 | public static function atomicCollectionStrategyNotAllowed(string $strategy, string $className, string $fieldName) : self |
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155 | { |
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156 | 1 | return new self(sprintf('%s collection strategy can be used only in top level document, used in %s::%s', $strategy, $className, $fieldName)); |
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157 | } |
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158 | |||
159 | 4 | public static function owningAndInverseReferencesRequireTargetDocument(string $className, string $fieldName) : self |
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160 | { |
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161 | 4 | return new self(sprintf('Target document must be specified for owning/inverse sides of reference: %s::%s', $className, $fieldName)); |
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162 | } |
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163 | |||
164 | 1 | public static function mustNotChangeIdentifierFieldsType(string $className, string $fieldName) : self |
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165 | { |
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166 | 1 | return new self(sprintf('%s::%s was declared an identifier and must stay this way.', $className, $fieldName)); |
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167 | } |
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168 | |||
169 | 1 | public static function referenceManySortMustNotBeUsedWithNonSetCollectionStrategy(string $className, string $fieldName, string $strategy) : self |
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170 | { |
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171 | 1 | return new self(sprintf("ReferenceMany's sort can not be used with addToSet and pushAll strategies, %s used in %s::%s", $strategy, $className, $fieldName)); |
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172 | } |
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173 | |||
174 | public static function invalidStorageStrategy(string $className, string $fieldName, string $type, string $strategy) : self |
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175 | { |
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176 | return new self(sprintf('Invalid strategy %s used in %s::%s with type %s', $strategy, $className, $fieldName, $type)); |
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177 | } |
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178 | |||
179 | 1 | public static function collectionClassDoesNotImplementCommonInterface(string $className, string $fieldName, string $collectionClass) : self |
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180 | { |
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181 | 1 | return new self(sprintf('%s used as custom collection class for %s::%s has to implement %s interface.', $collectionClass, $className, $fieldName, Collection::class)); |
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182 | } |
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183 | |||
184 | 2 | public static function shardKeyInSingleCollInheritanceSubclass(string $subclassName) : self |
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185 | { |
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186 | 2 | return new self(sprintf('Shard key overriding in subclass is forbidden for single collection inheritance: %s', $subclassName)); |
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187 | } |
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188 | |||
189 | 2 | public static function embeddedDocumentCantHaveShardKey(string $className) : self |
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190 | { |
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191 | 2 | return new self(sprintf("Embedded document can't have shard key: %s", $className)); |
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192 | } |
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193 | |||
194 | 1 | public static function onlySetStrategyAllowedInShardKey(string $className, string $fieldName) : self |
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195 | { |
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196 | 1 | return new self(sprintf('Only fields using the SET strategy can be used in the shard key: %s::%s', $className, $fieldName)); |
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197 | } |
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198 | |||
199 | 3 | public static function noMultiKeyShardKeys(string $className, string $fieldName) : self |
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200 | { |
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201 | 3 | return new self(sprintf('No multikey indexes are allowed in the shard key: %s::%s', $className, $fieldName)); |
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202 | } |
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203 | |||
204 | public static function cannotLookupDbRefReference(string $className, string $fieldName) : self |
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205 | { |
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206 | return new self(sprintf("Cannot use reference '%s' in class '%s' for lookup or graphLookup: dbRef references are not supported.", $fieldName, $className)); |
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207 | } |
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208 | |||
209 | public static function repositoryMethodLookupNotAllowed(string $className, string $fieldName) : self |
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210 | { |
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211 | return new self(sprintf("Cannot use reference '%s' in class '%s' for lookup or graphLookup. repositoryMethod is not supported in \$lookup and \$graphLookup stages.", $fieldName, $className)); |
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212 | } |
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213 | |||
214 | 1 | public static function cannotUseShardedCollectionInOutStage(string $className) : self |
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215 | { |
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216 | 1 | return new self(sprintf("Cannot use class '%s' as collection for out stage. Sharded collections are not allowed.", $className)); |
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217 | } |
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218 | |||
219 | 3 | public static function cannotUseShardedCollectionInLookupStages(string $className) : self |
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220 | { |
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221 | 3 | return new self(sprintf("Cannot use class '%s' as collection for lookup or graphLookup stage. Sharded collections are not allowed.", $className)); |
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222 | } |
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223 | |||
224 | public static function referencePrimersOnlySupportedForInverseReferenceMany(string $className, string $fieldName) : self |
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225 | { |
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226 | return new self(sprintf("Cannot use reference priming on '%s' in class '%s'. Reference priming is only supported for inverse references", $fieldName, $className)); |
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227 | } |
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228 | |||
229 | 1 | public static function connectFromFieldMustReferenceSameDocument(string $fieldName) : self |
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233 | |||
234 | 3 | public static function repositoryMethodCanNotBeCombinedWithSkipLimitAndSort(string $className, string $fieldName) : self |
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238 | |||
239 | 2 | public static function xmlMappingFileInvalid(string $filename, string $errorDetails) : self |
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243 | |||
244 | 1 | public static function fieldNotAllowedForGridFS(string $className, string $fieldName) : self |
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248 | |||
249 | public static function discriminatorNotAllowedForGridFS(string $className) : self |
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253 | |||
254 | 4 | public static function invalidRepositoryClass(string $className, string $repositoryClass, string $expectedRepositoryClass) : self |
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255 | { |
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256 | 4 | return new self(sprintf( |
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257 | 4 | 'Invalid repository class "%s" for mapped class "%s". It must be an instance of "%s".', |
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258 | 4 | $repositoryClass, |
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259 | 4 | $className, |
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260 | 4 | $expectedRepositoryClass |
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261 | )); |
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262 | } |
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263 | |||
264 | 2 | public static function viewWithoutRootClass(string $className) : self |
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265 | { |
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266 | 2 | return new self(sprintf('Class "%s" mapped as view without must have a root class.', $className)); |
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267 | } |
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268 | |||
269 | 2 | public static function viewRootClassNotFound(string $className, string $rootClass) : self |
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270 | { |
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271 | 2 | return new self(sprintf('Root class "%s" for view "%s" could not be found.', $rootClass, $className)); |
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272 | } |
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273 | } |
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274 |