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1 | <?php |
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2 | |||
3 | namespace ByJG\AnyDataset\Repository; |
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4 | |||
5 | use ByJG\AnyDataset\Exception\IteratorException; |
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6 | |||
7 | class SQLRelayIterator extends GenericIterator |
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8 | { |
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9 | |||
10 | const RECORD_BUFFER = 50; |
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11 | |||
12 | private $_rowBuffer; |
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13 | protected $_currentRow = 0; |
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14 | protected $_moveNextRow = 0; |
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15 | |||
16 | /** |
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17 | * @var resource |
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18 | */ |
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19 | private $_cursor; |
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20 | |||
21 | /** |
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22 | * |
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23 | * @param resource $cursor |
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24 | */ |
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25 | public function __construct($cursor) |
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26 | { |
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27 | $this->_cursor = $cursor; |
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28 | $this->_rowBuffer = array(); |
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29 | } |
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30 | |||
31 | /** |
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32 | * @return int |
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33 | */ |
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34 | public function count() |
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35 | { |
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36 | return sqlrcur_rowCount($this->_cursor); |
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37 | } |
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38 | |||
39 | /** |
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40 | * @return bool |
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41 | */ |
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42 | public function hasNext() |
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43 | { |
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44 | if (count($this->_rowBuffer) >= SQLRelayIterator::RECORD_BUFFER) { |
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45 | return true; |
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46 | } else if (is_null($this->_cursor)) { |
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47 | return (count($this->_rowBuffer) > 0); |
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48 | } else if ($this->_currentRow < $this->count()) { |
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49 | $sr = new SingleRow(); |
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50 | |||
51 | $colCount = sqlrcur_colCount($this->_cursor); |
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52 | for ($col = 0; $col < $colCount; $col++) { |
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53 | $fieldName = strtolower(sqlrcur_getColumnName($this->_cursor, $col)); |
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54 | $value = sqlrcur_getField($this->_cursor, $this->_currentRow, $col); |
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55 | |||
56 | if (is_null($value)) { |
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57 | $sr->addField($fieldName, ""); |
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58 | } elseif (is_object($value)) { |
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59 | $sr->addField($fieldName, "[OBJECT]"); |
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60 | } else { |
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61 | $value = AnyDataset::fixUTF8($value); |
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62 | $sr->addField($fieldName, $value); |
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63 | } |
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64 | } |
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65 | |||
66 | $this->_currentRow++; |
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67 | |||
68 | // Enfileira o registo |
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69 | array_push($this->_rowBuffer, $sr); |
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70 | // Traz novos até encher o Buffer |
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71 | if (count($this->_rowBuffer) < DBIterator::RECORD_BUFFER) { |
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72 | $this->hasNext(); |
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73 | } |
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74 | |||
75 | return true; |
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76 | } else { |
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77 | sqlrcur_free($this->_cursor); |
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78 | $this->_cursor = null; |
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79 | |||
80 | return (count($this->_rowBuffer) > 0); |
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81 | } |
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82 | } |
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83 | |||
84 | public function __destruct() |
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85 | { |
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86 | if (!is_null($this->_cursor)) { |
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87 | @sqlrcur_free($this->_cursor); |
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88 | $this->_cursor = null; |
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89 | } |
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90 | } |
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91 | |||
92 | /** |
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93 | * @return SingleRow |
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94 | * @throws IteratorException |
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95 | */ |
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96 | View Code Duplication | public function moveNext() |
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97 | { |
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98 | if (!$this->hasNext()) { |
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99 | throw new IteratorException("No more records. Did you used hasNext() before moveNext()?"); |
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100 | } else { |
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101 | $sr = array_shift($this->_rowBuffer); |
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102 | $this->_moveNextRow++; |
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103 | return $sr; |
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104 | } |
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105 | } |
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106 | |||
107 | function key() |
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108 | { |
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109 | return $this->_moveNextRow; |
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110 | } |
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111 | } |
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112 |
If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
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