assigning incompatible types to properties.
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1 | <?php |
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2 | /** |
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3 | * @ingroup SMWDataItems |
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4 | */ |
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5 | |||
6 | use SMW\Exception\DataItemException; |
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7 | use SMW\DIProperty; |
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8 | use SMWDIBlob as DIBlob; |
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9 | |||
10 | /** |
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11 | * This class implements container data items that can store SMWSemanticData |
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12 | * objects. Containers are not dataitems in the proper sense: they do not |
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13 | * represent a single, opaque value that can be assigned to a property. Rather, |
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14 | * a container represents a "subobject" with a number of property-value |
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15 | * assignments. When a container is stored, these individual data assignments |
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16 | * are stored -- the data managed by SMW never contains any "container", just |
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17 | * individual property assignments for the subobject. Likewise, when a container |
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18 | * is used in search, it is interpreted as a patterns of possible property |
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19 | * assignments, and this pattern is searched for. |
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20 | * |
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21 | * The data encapsulated in a container data item is essentially an |
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22 | * SMWSemanticData object of class SMWContainerSemanticData. This class allows |
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23 | * the subject to be kept anonymous if not known (if no context page is |
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24 | * available for finding a suitable subobject name). See the repsective |
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25 | * documentation for details. |
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26 | * |
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27 | * Being a mere placeholder/template for other data, an SMWDIContainer is not |
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28 | * immutable as the other basic data items. New property-value pairs can always |
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29 | * be added to the internal SMWContainerSemanticData. |
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30 | * |
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31 | * @since 1.6 |
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32 | * |
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33 | * @author Markus Krötzsch |
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34 | * @ingroup SMWDataItems |
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35 | */ |
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36 | class SMWDIContainer extends SMWDataItem { |
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37 | |||
38 | /** |
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39 | * Internal value. |
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40 | * |
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41 | * @var SMWSemanticData |
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42 | */ |
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43 | protected $m_semanticData; |
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44 | |||
45 | /** |
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46 | * Constructor. The given SMWContainerSemanticData object will be owned |
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47 | * by the constructed object afterwards, and in particular will not |
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48 | * allow further changes. |
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49 | * |
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50 | * @param $semanticData SMWContainerSemanticData |
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51 | */ |
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52 | 164 | public function __construct( SMWContainerSemanticData $semanticData ) { |
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53 | 164 | $this->m_semanticData = $semanticData; |
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54 | 164 | } |
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55 | |||
56 | 5 | public function getDIType() { |
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57 | 5 | return SMWDataItem::TYPE_CONTAINER; |
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58 | } |
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59 | |||
60 | 164 | public function getSemanticData() { |
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61 | 164 | return $this->m_semanticData; |
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62 | } |
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63 | |||
64 | 6 | public function getSortKey() { |
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65 | 6 | return ''; |
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66 | } |
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67 | |||
68 | /** |
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69 | * @since 2.5 |
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70 | * |
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71 | * @param string $sortKey |
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72 | */ |
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73 | 34 | public function setSortKey( $sortKey ) { |
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74 | 34 | $this->m_semanticData->addPropertyObjectValue( |
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75 | 34 | new DIProperty( '_SKEY' ), |
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76 | 34 | new DIBlob( $this->m_semanticData->getSubject()->getSortKey() . '#' . $sortKey ) |
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77 | ); |
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78 | 34 | } |
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79 | |||
80 | public function getSerialization() { |
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81 | return serialize( $this->m_semanticData ); |
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82 | } |
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83 | |||
84 | /** |
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85 | * Get a hash string for this data item. |
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86 | * |
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87 | * @return string |
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88 | */ |
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89 | 1 | public function getHash() { |
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90 | |||
91 | 1 | $hash = $this->getValueHash( $this->m_semanticData ); |
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92 | 1 | sort( $hash ); |
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93 | |||
94 | 1 | return md5( implode( '#', $hash ) ); |
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95 | |||
96 | // We want a value hash, not an entity hash!! |
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97 | // return $this->m_semanticData->getHash(); |
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98 | } |
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99 | |||
100 | 1 | private function getValueHash( $semanticData ) { |
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101 | |||
102 | 1 | $hash = array(); |
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103 | |||
104 | 1 | foreach ( $semanticData->getProperties() as $property ) { |
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105 | 1 | $hash[] = $property->getKey(); |
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106 | |||
107 | 1 | foreach ( $semanticData->getPropertyValues( $property ) as $di ) { |
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108 | 1 | $hash[] = $di->getHash(); |
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109 | } |
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110 | } |
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111 | |||
112 | 1 | foreach ( $semanticData->getSubSemanticData() as $data ) { |
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113 | $hash[] = $this->getValueHash( $data ); |
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114 | } |
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115 | |||
116 | 1 | return $hash; |
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117 | } |
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118 | |||
119 | /** |
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120 | * Create a data item from the provided serialization string and type |
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121 | * ID. |
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122 | * |
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123 | * @return SMWDIContainer |
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124 | */ |
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125 | public static function doUnserialize( $serialization ) { |
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126 | /// TODO May issue an E_NOTICE when problems occur; catch this |
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127 | $data = unserialize( $serialization ); |
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128 | if ( !( $data instanceof SMWContainerSemanticData ) ) { |
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129 | throw new DataItemException( "Could not unserialize SMWDIContainer from the given string." ); |
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130 | } |
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131 | return new SMWDIContainer( $data ); |
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132 | } |
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133 | |||
134 | public function equals( SMWDataItem $di ) { |
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135 | if ( $di->getDIType() !== SMWDataItem::TYPE_CONTAINER ) { |
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136 | return false; |
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137 | } |
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138 | |||
139 | return $di->getSerialization() === $this->getSerialization(); |
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140 | } |
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141 | } |
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142 |
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..