Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like XmlDriver 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 XmlDriver, and based on these observations, apply Extract Interface, too.
1 | <?php |
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33 | class XmlDriver extends FileDriver |
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34 | { |
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35 | const DEFAULT_FILE_EXTENSION = '.dcm.xml'; |
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36 | |||
37 | /** |
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38 | * {@inheritDoc} |
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39 | */ |
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40 | 13 | public function __construct($locator, $fileExtension = self::DEFAULT_FILE_EXTENSION) |
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44 | |||
45 | /** |
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46 | * {@inheritDoc} |
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47 | */ |
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48 | 8 | public function loadMetadataForClass($className, ClassMetadata $class) |
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49 | { |
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50 | /* @var $class ClassMetadataInfo */ |
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51 | /* @var $xmlRoot \SimpleXMLElement */ |
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52 | 8 | $xmlRoot = $this->getElement($className); |
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53 | 8 | if ( ! $xmlRoot) { |
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54 | return; |
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55 | } |
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56 | |||
57 | 8 | if ($xmlRoot->getName() == 'document') { |
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58 | 8 | if (isset($xmlRoot['repository-class'])) { |
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59 | 8 | $class->setCustomRepositoryClass((string) $xmlRoot['repository-class']); |
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60 | } |
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61 | 3 | } elseif ($xmlRoot->getName() == 'mapped-superclass') { |
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62 | 2 | $class->setCustomRepositoryClass( |
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63 | 2 | isset($xmlRoot['repository-class']) ? (string) $xmlRoot['repository-class'] : null |
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64 | ); |
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65 | 2 | $class->isMappedSuperclass = true; |
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66 | 1 | } elseif ($xmlRoot->getName() == 'embedded-document') { |
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67 | 1 | $class->isEmbeddedDocument = true; |
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68 | } |
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69 | 8 | if (isset($xmlRoot['db'])) { |
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70 | 4 | $class->setDatabase((string) $xmlRoot['db']); |
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71 | } |
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72 | 8 | if (isset($xmlRoot['collection'])) { |
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73 | 7 | if (isset($xmlRoot['capped-collection'])) { |
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74 | $config = array('name' => (string) $xmlRoot['collection']); |
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75 | $config['capped'] = (bool) $xmlRoot['capped-collection']; |
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76 | if (isset($xmlRoot['capped-collection-max'])) { |
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77 | $config['max'] = (int) $xmlRoot['capped-collection-max']; |
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78 | } |
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79 | if (isset($xmlRoot['capped-collection-size'])) { |
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80 | $config['size'] = (int) $xmlRoot['capped-collection-size']; |
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81 | } |
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82 | $class->setCollection($config); |
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83 | } else { |
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84 | 7 | $class->setCollection((string) $xmlRoot['collection']); |
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85 | } |
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86 | } |
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87 | 8 | if (isset($xmlRoot['writeConcern'])) { |
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88 | 1 | $class->setWriteConcern((string) $xmlRoot['writeConcern']); |
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89 | } |
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90 | 8 | if (isset($xmlRoot['inheritance-type'])) { |
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91 | $inheritanceType = (string) $xmlRoot['inheritance-type']; |
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92 | $class->setInheritanceType(constant(MappingClassMetadata::class . '::INHERITANCE_TYPE_' . $inheritanceType)); |
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93 | } |
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94 | 8 | View Code Duplication | if (isset($xmlRoot['change-tracking-policy'])) { |
95 | 2 | $class->setChangeTrackingPolicy(constant(MappingClassMetadata::class . '::CHANGETRACKING_' . strtoupper((string) $xmlRoot['change-tracking-policy']))); |
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96 | } |
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97 | 8 | if (isset($xmlRoot->{'discriminator-field'})) { |
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98 | 1 | $discrField = $xmlRoot->{'discriminator-field'}; |
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99 | /* XSD only allows for "name", which is consistent with association |
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100 | * configurations, but fall back to "fieldName" for BC. |
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101 | */ |
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102 | 1 | $class->setDiscriminatorField( |
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103 | 1 | isset($discrField['name']) ? (string) $discrField['name'] : (string) $discrField['fieldName'] |
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104 | ); |
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105 | } |
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106 | 8 | View Code Duplication | if (isset($xmlRoot->{'discriminator-map'})) { |
107 | 1 | $map = array(); |
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108 | 1 | foreach ($xmlRoot->{'discriminator-map'}->{'discriminator-mapping'} AS $discrMapElement) { |
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109 | 1 | $map[(string) $discrMapElement['value']] = (string) $discrMapElement['class']; |
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110 | } |
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111 | 1 | $class->setDiscriminatorMap($map); |
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112 | } |
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113 | 8 | if (isset($xmlRoot->{'default-discriminator-value'})) { |
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114 | 1 | $class->setDefaultDiscriminatorValue((string) $xmlRoot->{'default-discriminator-value'}['value']); |
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115 | } |
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116 | 8 | if (isset($xmlRoot->{'indexes'})) { |
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117 | 3 | foreach ($xmlRoot->{'indexes'}->{'index'} as $index) { |
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118 | 3 | $this->addIndex($class, $index); |
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119 | } |
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120 | } |
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121 | 8 | if (isset($xmlRoot->{'shard-key'})) { |
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122 | 1 | $this->setShardKey($class, $xmlRoot->{'shard-key'}[0]); |
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123 | } |
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124 | 8 | if (isset($xmlRoot['require-indexes'])) { |
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125 | 1 | $class->setRequireIndexes('true' === (string) $xmlRoot['require-indexes']); |
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126 | } |
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127 | 8 | if (isset($xmlRoot['slave-okay'])) { |
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128 | 1 | $class->setSlaveOkay('true' === (string) $xmlRoot['slave-okay']); |
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129 | } |
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130 | 8 | if (isset($xmlRoot->field)) { |
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131 | 8 | foreach ($xmlRoot->field as $field) { |
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132 | 8 | $mapping = array(); |
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133 | 8 | $attributes = $field->attributes(); |
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134 | 8 | foreach ($attributes as $key => $value) { |
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135 | 8 | $mapping[$key] = (string) $value; |
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136 | 8 | $booleanAttributes = array('id', 'reference', 'embed', 'unique', 'sparse', 'file', 'distance'); |
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137 | 8 | if (in_array($key, $booleanAttributes)) { |
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138 | 8 | $mapping[$key] = ('true' === $mapping[$key]); |
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139 | } |
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140 | } |
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141 | 8 | if (isset($mapping['id']) && $mapping['id'] === true && isset($mapping['strategy'])) { |
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142 | 3 | $mapping['options'] = array(); |
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143 | 3 | if (isset($field->{'id-generator-option'})) { |
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144 | 1 | foreach ($field->{'id-generator-option'} as $generatorOptions) { |
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145 | 1 | $attributesGenerator = iterator_to_array($generatorOptions->attributes()); |
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146 | 1 | if (isset($attributesGenerator['name']) && isset($attributesGenerator['value'])) { |
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147 | 1 | $mapping['options'][(string) $attributesGenerator['name']] = (string) $attributesGenerator['value']; |
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148 | } |
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149 | } |
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150 | } |
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151 | } |
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152 | |||
153 | 8 | if (isset($attributes['not-saved'])) { |
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154 | $mapping['notSaved'] = ('true' === (string) $attributes['not-saved']); |
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155 | } |
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156 | |||
157 | 8 | if (isset($attributes['also-load'])) { |
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158 | $mapping['alsoLoadFields'] = explode(',', $attributes['also-load']); |
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159 | 8 | } elseif (isset($attributes['version'])) { |
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160 | 1 | $mapping['version'] = ('true' === (string) $attributes['version']); |
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161 | 8 | } elseif (isset($attributes['lock'])) { |
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162 | 1 | $mapping['lock'] = ('true' === (string) $attributes['lock']); |
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163 | } |
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164 | |||
165 | 8 | $this->addFieldMapping($class, $mapping); |
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166 | } |
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167 | } |
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168 | 8 | if (isset($xmlRoot->{'embed-one'})) { |
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169 | 2 | foreach ($xmlRoot->{'embed-one'} as $embed) { |
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170 | 2 | $this->addEmbedMapping($class, $embed, 'one'); |
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171 | } |
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172 | } |
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173 | 8 | if (isset($xmlRoot->{'embed-many'})) { |
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174 | 2 | foreach ($xmlRoot->{'embed-many'} as $embed) { |
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175 | 2 | $this->addEmbedMapping($class, $embed, 'many'); |
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176 | } |
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177 | } |
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178 | 8 | if (isset($xmlRoot->{'reference-many'})) { |
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179 | 3 | foreach ($xmlRoot->{'reference-many'} as $reference) { |
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180 | 3 | $this->addReferenceMapping($class, $reference, 'many'); |
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181 | } |
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182 | } |
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183 | 8 | if (isset($xmlRoot->{'reference-one'})) { |
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184 | 3 | foreach ($xmlRoot->{'reference-one'} as $reference) { |
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185 | 3 | $this->addReferenceMapping($class, $reference, 'one'); |
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186 | } |
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187 | } |
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188 | 8 | if (isset($xmlRoot->{'lifecycle-callbacks'})) { |
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189 | 2 | foreach ($xmlRoot->{'lifecycle-callbacks'}->{'lifecycle-callback'} as $lifecycleCallback) { |
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190 | 2 | $class->addLifecycleCallback((string) $lifecycleCallback['method'], constant('Doctrine\ODM\MongoDB\Events::' . (string) $lifecycleCallback['type'])); |
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191 | } |
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192 | } |
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193 | 8 | if (isset($xmlRoot->{'also-load-methods'})) { |
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194 | 1 | foreach ($xmlRoot->{'also-load-methods'}->{'also-load-method'} as $alsoLoadMethod) { |
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195 | 1 | $class->registerAlsoLoadMethod((string) $alsoLoadMethod['method'], (string) $alsoLoadMethod['field']); |
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196 | } |
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197 | } |
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198 | 8 | } |
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199 | |||
200 | 8 | private function addFieldMapping(ClassMetadataInfo $class, $mapping) |
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241 | |||
242 | 2 | private function addEmbedMapping(ClassMetadataInfo $class, $embed, $type) |
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243 | { |
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244 | 2 | $attributes = $embed->attributes(); |
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245 | 2 | $defaultStrategy = $type == 'one' ? ClassMetadataInfo::STORAGE_STRATEGY_SET : CollectionHelper::DEFAULT_STRATEGY; |
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246 | $mapping = array( |
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247 | 2 | 'type' => $type, |
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248 | 'embedded' => true, |
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249 | 2 | 'targetDocument' => isset($attributes['target-document']) ? (string) $attributes['target-document'] : null, |
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250 | 2 | 'name' => (string) $attributes['field'], |
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251 | 2 | 'strategy' => isset($attributes['strategy']) ? (string) $attributes['strategy'] : $defaultStrategy, |
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252 | ); |
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253 | 2 | if (isset($attributes['fieldName'])) { |
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254 | 1 | $mapping['fieldName'] = (string) $attributes['fieldName']; |
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255 | } |
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256 | 2 | View Code Duplication | if (isset($embed->{'discriminator-field'})) { |
257 | 1 | $attr = $embed->{'discriminator-field'}; |
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258 | 1 | $mapping['discriminatorField'] = (string) $attr['name']; |
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259 | } |
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260 | 2 | View Code Duplication | if (isset($embed->{'discriminator-map'})) { |
261 | 1 | foreach ($embed->{'discriminator-map'}->{'discriminator-mapping'} as $discriminatorMapping) { |
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262 | 1 | $attr = $discriminatorMapping->attributes(); |
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263 | 1 | $mapping['discriminatorMap'][(string) $attr['value']] = (string) $attr['class']; |
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264 | } |
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265 | } |
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266 | 2 | if (isset($embed->{'default-discriminator-value'})) { |
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267 | 1 | $mapping['defaultDiscriminatorValue'] = (string) $embed->{'default-discriminator-value'}['value']; |
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268 | } |
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269 | 2 | if (isset($attributes['not-saved'])) { |
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270 | $mapping['notSaved'] = ('true' === (string) $attributes['not-saved']); |
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271 | } |
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272 | 2 | if (isset($attributes['also-load'])) { |
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273 | $mapping['alsoLoadFields'] = explode(',', $attributes['also-load']); |
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274 | } |
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275 | 2 | $this->addFieldMapping($class, $mapping); |
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276 | 2 | } |
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277 | |||
278 | 3 | private function addReferenceMapping(ClassMetadataInfo $class, $reference, $type) |
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279 | { |
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280 | 3 | $cascade = array_keys((array) $reference->cascade); |
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281 | 3 | if (1 === count($cascade)) { |
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282 | 2 | $cascade = current($cascade) ?: next($cascade); |
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283 | } |
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284 | 3 | $attributes = $reference->attributes(); |
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285 | 3 | $defaultStrategy = $type == 'one' ? ClassMetadataInfo::STORAGE_STRATEGY_SET : CollectionHelper::DEFAULT_STRATEGY; |
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286 | $mapping = array( |
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287 | 3 | 'cascade' => $cascade, |
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288 | 3 | 'orphanRemoval' => isset($attributes['orphan-removal']) ? ('true' === (string) $attributes['orphan-removal']) : false, |
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289 | 3 | 'type' => $type, |
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290 | 'reference' => true, |
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291 | 3 | 'simple' => isset($attributes['simple']) ? ('true' === (string) $attributes['simple']) : false, // deprecated |
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292 | 3 | 'storeAs' => isset($attributes['store-as']) ? (string) $attributes['store-as'] : ClassMetadataInfo::REFERENCE_STORE_AS_DB_REF_WITH_DB, |
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293 | 3 | 'targetDocument' => isset($attributes['target-document']) ? (string) $attributes['target-document'] : null, |
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294 | 3 | 'name' => (string) $attributes['field'], |
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295 | 3 | 'strategy' => isset($attributes['strategy']) ? (string) $attributes['strategy'] : $defaultStrategy, |
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296 | 3 | 'inversedBy' => isset($attributes['inversed-by']) ? (string) $attributes['inversed-by'] : null, |
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297 | 3 | 'mappedBy' => isset($attributes['mapped-by']) ? (string) $attributes['mapped-by'] : null, |
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298 | 3 | 'repositoryMethod' => isset($attributes['repository-method']) ? (string) $attributes['repository-method'] : null, |
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299 | 3 | 'limit' => isset($attributes['limit']) ? (integer) $attributes['limit'] : null, |
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300 | 3 | 'skip' => isset($attributes['skip']) ? (integer) $attributes['skip'] : null, |
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301 | ); |
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302 | |||
303 | 3 | if (isset($attributes['fieldName'])) { |
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304 | 1 | $mapping['fieldName'] = (string) $attributes['fieldName']; |
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305 | } |
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306 | 3 | View Code Duplication | if (isset($reference->{'discriminator-field'})) { |
307 | 1 | $attr = $reference->{'discriminator-field'}; |
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308 | 1 | $mapping['discriminatorField'] = (string) $attr['name']; |
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309 | } |
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310 | 3 | View Code Duplication | if (isset($reference->{'discriminator-map'})) { |
311 | 1 | foreach ($reference->{'discriminator-map'}->{'discriminator-mapping'} as $discriminatorMapping) { |
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312 | 1 | $attr = $discriminatorMapping->attributes(); |
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313 | 1 | $mapping['discriminatorMap'][(string) $attr['value']] = (string) $attr['class']; |
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314 | } |
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315 | } |
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316 | 3 | if (isset($reference->{'default-discriminator-value'})) { |
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317 | 1 | $mapping['defaultDiscriminatorValue'] = (string) $reference->{'default-discriminator-value'}['value']; |
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318 | } |
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319 | 3 | if (isset($reference->{'sort'})) { |
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320 | View Code Duplication | foreach ($reference->{'sort'}->{'sort'} as $sort) { |
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321 | $attr = $sort->attributes(); |
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322 | $mapping['sort'][(string) $attr['field']] = isset($attr['order']) ? (string) $attr['order'] : 'asc'; |
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323 | } |
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324 | } |
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325 | 3 | if (isset($reference->{'criteria'})) { |
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326 | View Code Duplication | foreach ($reference->{'criteria'}->{'criteria'} as $criteria) { |
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327 | $attr = $criteria->attributes(); |
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328 | $mapping['criteria'][(string) $attr['field']] = (string) $attr['value']; |
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329 | } |
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330 | } |
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331 | 3 | if (isset($attributes['not-saved'])) { |
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332 | $mapping['notSaved'] = ('true' === (string) $attributes['not-saved']); |
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333 | } |
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334 | 3 | if (isset($attributes['also-load'])) { |
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335 | $mapping['alsoLoadFields'] = explode(',', $attributes['also-load']); |
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336 | } |
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337 | 3 | $this->addFieldMapping($class, $mapping); |
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338 | 3 | } |
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339 | |||
340 | 3 | private function addIndex(ClassMetadataInfo $class, \SimpleXmlElement $xmlIndex) |
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341 | { |
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342 | 3 | $attributes = $xmlIndex->attributes(); |
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343 | |||
344 | 3 | $keys = array(); |
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345 | |||
346 | 3 | View Code Duplication | foreach ($xmlIndex->{'key'} as $key) { |
347 | 3 | $keys[(string) $key['name']] = isset($key['order']) ? (string) $key['order'] : 'asc'; |
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348 | } |
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349 | |||
350 | 3 | $options = array(); |
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351 | |||
352 | 3 | if (isset($attributes['background'])) { |
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353 | $options['background'] = ('true' === (string) $attributes['background']); |
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354 | } |
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355 | 3 | if (isset($attributes['drop-dups'])) { |
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356 | $options['dropDups'] = ('true' === (string) $attributes['drop-dups']); |
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357 | } |
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358 | 3 | if (isset($attributes['name'])) { |
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359 | $options['name'] = (string) $attributes['name']; |
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360 | } |
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361 | 3 | if (isset($attributes['safe'])) { |
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362 | $options['safe'] = ('true' === (string) $attributes['safe']); |
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363 | } |
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364 | 3 | if (isset($attributes['sparse'])) { |
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365 | $options['sparse'] = ('true' === (string) $attributes['sparse']); |
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366 | } |
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367 | 3 | if (isset($attributes['unique'])) { |
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368 | 1 | $options['unique'] = ('true' === (string) $attributes['unique']); |
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369 | } |
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370 | |||
371 | 3 | View Code Duplication | if (isset($xmlIndex->{'option'})) { |
372 | 1 | foreach ($xmlIndex->{'option'} as $option) { |
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373 | 1 | $value = (string) $option['value']; |
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374 | 1 | if ($value === 'true') { |
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375 | $value = true; |
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376 | 1 | } elseif ($value === 'false') { |
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377 | 1 | $value = false; |
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378 | 1 | } elseif (is_numeric($value)) { |
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379 | 1 | $value = preg_match('/^[-]?\d+$/', $value) ? (integer) $value : (float) $value; |
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380 | } |
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381 | 1 | $options[(string) $option['name']] = $value; |
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382 | } |
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383 | } |
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384 | |||
385 | 3 | if (isset($xmlIndex->{'partial-filter-expression'})) { |
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386 | 3 | $partialFilterExpressionMapping = $xmlIndex->{'partial-filter-expression'}; |
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387 | |||
388 | 3 | if (isset($partialFilterExpressionMapping->and)) { |
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389 | 2 | foreach ($partialFilterExpressionMapping->and as $and) { |
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390 | 2 | if (! isset($and->field)) { |
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391 | 1 | continue; |
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392 | } |
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393 | |||
394 | 2 | $partialFilterExpression = $this->getPartialFilterExpression($and->field); |
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395 | 2 | if (! $partialFilterExpression) { |
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396 | continue; |
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397 | } |
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398 | |||
399 | 2 | $options['partialFilterExpression']['$and'][] = $partialFilterExpression; |
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400 | } |
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401 | } elseif (isset($partialFilterExpressionMapping->field)) { |
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402 | 2 | $partialFilterExpression = $this->getPartialFilterExpression($partialFilterExpressionMapping->field); |
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403 | |||
404 | 2 | if ($partialFilterExpression) { |
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405 | 2 | $options['partialFilterExpression'] = $partialFilterExpression; |
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406 | } |
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407 | } |
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408 | } |
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409 | |||
410 | 3 | $class->addIndex($keys, $options); |
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411 | 3 | } |
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412 | |||
413 | 3 | private function getPartialFilterExpression(\SimpleXMLElement $fields) |
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414 | { |
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415 | 3 | $partialFilterExpression = []; |
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416 | 3 | foreach ($fields as $field) { |
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417 | 3 | $operator = (string) $field['operator'] ?: null; |
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418 | |||
419 | 3 | if (! isset($field['value'])) { |
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420 | 1 | if (! isset($field->field)) { |
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421 | continue; |
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422 | } |
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423 | |||
424 | 1 | $nestedExpression = $this->getPartialFilterExpression($field->field); |
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425 | 1 | if (! $nestedExpression) { |
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426 | continue; |
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427 | } |
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428 | |||
429 | 1 | $value = $nestedExpression; |
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430 | } else { |
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431 | 3 | $value = trim((string) $field['value']); |
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432 | } |
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433 | |||
434 | 3 | if ($value === 'true') { |
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435 | $value = true; |
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436 | 3 | } elseif ($value === 'false') { |
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437 | $value = false; |
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438 | 3 | } elseif (is_numeric($value)) { |
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439 | 2 | $value = preg_match('/^[-]?\d+$/', $value) ? (integer) $value : (float) $value; |
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440 | } |
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441 | |||
442 | 3 | $partialFilterExpression[(string) $field['name']] = $operator ? ['$' . $operator => $value] : $value; |
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443 | } |
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444 | |||
445 | 3 | return $partialFilterExpression; |
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446 | } |
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447 | |||
448 | 2 | private function setShardKey(ClassMetadataInfo $class, \SimpleXmlElement $xmlShardkey) |
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449 | { |
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450 | 2 | $attributes = $xmlShardkey->attributes(); |
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451 | |||
452 | 2 | $keys = array(); |
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453 | 2 | $options = array(); |
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454 | 2 | View Code Duplication | foreach ($xmlShardkey->{'key'} as $key) { |
455 | 2 | $keys[(string) $key['name']] = isset($key['order']) ? (string)$key['order'] : 'asc'; |
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456 | } |
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457 | |||
458 | 2 | if (isset($attributes['unique'])) { |
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459 | 1 | $options['unique'] = ('true' === (string) $attributes['unique']); |
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460 | } |
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461 | |||
462 | 2 | if (isset($attributes['numInitialChunks'])) { |
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463 | 1 | $options['numInitialChunks'] = (int) $attributes['numInitialChunks']; |
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464 | } |
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465 | |||
466 | 2 | View Code Duplication | if (isset($xmlShardkey->{'option'})) { |
467 | 1 | foreach ($xmlShardkey->{'option'} as $option) { |
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468 | 1 | $value = (string) $option['value']; |
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469 | 1 | if ($value === 'true') { |
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470 | 1 | $value = true; |
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471 | 1 | } elseif ($value === 'false') { |
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472 | $value = false; |
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473 | 1 | } elseif (is_numeric($value)) { |
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474 | 1 | $value = preg_match('/^[-]?\d+$/', $value) ? (integer) $value : (float) $value; |
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475 | } |
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476 | 1 | $options[(string) $option['name']] = $value; |
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477 | } |
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478 | } |
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479 | |||
480 | 2 | $class->setShardKey($keys, $options); |
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481 | 2 | } |
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482 | |||
483 | /** |
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484 | * {@inheritDoc} |
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485 | */ |
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486 | 8 | protected function loadMappingFile($file) |
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502 | } |
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503 |
If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: