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1 | <?php |
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2 | |||
3 | namespace Hateoas\Representation; |
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4 | |||
5 | use Hateoas\Configuration\Annotation as Hateoas; |
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6 | use JMS\Serializer\Annotation as Serializer; |
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7 | |||
8 | /** |
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9 | * @Serializer\ExclusionPolicy("all") |
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10 | * @Serializer\XmlRoot("collection") |
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11 | * @Serializer\AccessorOrder("custom", custom = {"offset", "limit", "total"}) |
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12 | * |
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13 | * @Hateoas\Relation( |
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14 | * "first", |
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15 | * href = @Hateoas\Route( |
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16 | * "expr(object.getRoute())", |
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17 | * parameters = "expr(object.getParameters(0))", |
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18 | * absolute = "expr(object.isAbsolute())" |
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19 | * ) |
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20 | * ) |
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21 | * @Hateoas\Relation( |
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22 | * "last", |
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23 | * href = @Hateoas\Route( |
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24 | * "expr(object.getRoute())", |
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25 | * parameters = "expr(object.getParameters((object.getTotal() - 1) - (object.getTotal() - 1) % object.getLimit()))", |
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26 | * absolute = "expr(object.isAbsolute())" |
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27 | * ), |
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28 | * exclusion = @Hateoas\Exclusion( |
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29 | * excludeIf = "expr(object.getTotal() === null)" |
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30 | * ) |
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31 | * ) |
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32 | * @Hateoas\Relation( |
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33 | * "next", |
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34 | * href = @Hateoas\Route( |
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35 | * "expr(object.getRoute())", |
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36 | * parameters = "expr(object.getParameters(object.getOffset() + object.getLimit()))", |
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37 | * absolute = "expr(object.isAbsolute())" |
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38 | * ), |
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39 | * exclusion = @Hateoas\Exclusion( |
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40 | * excludeIf = "expr(object.getTotal() !== null && (object.getOffset() + object.getLimit()) >= object.getTotal())" |
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41 | * ) |
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42 | * ) |
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43 | * @Hateoas\Relation( |
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44 | * "previous", |
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45 | * href = @Hateoas\Route( |
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46 | * "expr(object.getRoute())", |
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47 | * parameters = "expr(object.getParameters((object.getOffset() > object.getLimit()) ? object.getOffset() - object.getLimit() : 0))", |
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48 | * absolute = "expr(object.isAbsolute())" |
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49 | * ), |
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50 | * exclusion = @Hateoas\Exclusion( |
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51 | * excludeIf = "expr(! object.getOffset())" |
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52 | * ) |
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53 | * ) |
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54 | * |
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55 | * @author Premi Giorgio <[email protected]> |
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56 | */ |
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57 | class OffsetRepresentation extends AbstractSegmentedRepresentation |
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58 | { |
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59 | /** |
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60 | * @var int |
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61 | * |
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62 | * @Serializer\Expose |
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63 | * @Serializer\XmlAttribute |
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64 | */ |
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65 | private $offset; |
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66 | |||
67 | /** |
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68 | * @var string |
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69 | */ |
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70 | private $offsetParameterName; |
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71 | |||
72 | /** |
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73 | * @param CollectionRepresentation $inline |
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74 | * @param string $route |
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75 | * @param integer|null $offset |
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76 | * @param integer $limit |
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77 | * @param integer $total |
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78 | */ |
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79 | View Code Duplication | public function __construct( |
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80 | $inline, |
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81 | $route, |
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82 | array $parameters = array(), |
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83 | $offset, |
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84 | $limit, |
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85 | $total = null, |
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86 | $offsetParameterName = null, |
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87 | $limitParameterName = null, |
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88 | $absolute = false |
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89 | ) { |
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90 | parent::__construct($inline, $route, $parameters, $limit, $total, $limitParameterName, $absolute); |
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91 | |||
92 | $this->offset = $offset; |
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93 | $this->offsetParameterName = $offsetParameterName ?: 'offset'; |
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94 | } |
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95 | |||
96 | /** |
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97 | * @return int |
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98 | */ |
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99 | public function getOffset() |
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100 | { |
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101 | return $this->offset; |
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102 | } |
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103 | |||
104 | /** |
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105 | * @param null $offset |
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106 | * @param null $limit |
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107 | * @return array |
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108 | */ |
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109 | public function getParameters($offset = null, $limit = null) |
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110 | { |
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111 | $parameters = parent::getParameters($limit); |
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112 | |||
113 | unset($parameters[$this->offsetParameterName]); |
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114 | |||
115 | if (null === $offset) { |
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116 | $offset = $this->getOffset(); |
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117 | } |
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118 | |||
119 | if ($offset) { |
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120 | $parameters[$this->offsetParameterName] = $offset; |
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121 | $this->moveParameterToEnd($parameters, $this->getLimitParameterName()); |
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122 | } |
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123 | |||
124 | return $parameters; |
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125 | } |
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126 | |||
127 | /** |
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128 | * @return string |
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129 | */ |
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130 | public function getOffsetParameterName() |
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131 | { |
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132 | return $this->offsetParameterName; |
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133 | } |
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134 | } |
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135 |
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
integer
values, zero is a special case, in particular the following results might be unexpected: