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| 1 | <?php
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1 | <?php
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| 2 | 2 | ||
| 3 | namespace PointedEars\PHPX; |
3 | namespace PointedEars\PHPX; |
| 4 | 4 | ||
| 5 | /**
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5 | /**
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| 6 | * Base class providing generic wrappers for reading from and
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6 | * Base class providing generic wrappers for reading from and
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| 7 | * and writing to inaccessible properties.
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7 | * and writing to inaccessible properties.
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| 8 | *
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8 | *
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| 9 | * For each such property there must exist a public dynamically
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9 | * For each such property there must exist a public dynamically
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| 10 | * bound method (the PHP default) in the inheriting class whose
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10 | * bound method (the PHP default) in the inheriting class whose
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| 11 | * name is prefixed with 'get' (a <i>getter</i>, for read access)
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11 | * name is prefixed with 'get' (a <i>getter</i>, for read access)
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| 12 | * and/or with 'set' (a <i>setter</i>, for write access) followed
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12 | * and/or with 'set' (a <i>setter</i>, for write access) followed
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| 13 | * by the property name. (It is recommended to write the first
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13 | * by the property name. (It is recommended to write the first
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| 14 | * letter of the property name in the method name in uppercase.
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14 | * letter of the property name in the method name in uppercase.
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| 15 | * For runtime-efficiency, underscores in the property name are
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15 | * For runtime-efficiency, underscores in the property name are
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| 16 | * <em>not</em> converted to camel-case ["property_name" requires
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16 | * <em>not</em> converted to camel-case ["property_name" requires
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| 17 | * "getProperty_name", <em>not</em> "getPropertyName"].)
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17 | * "getProperty_name", <em>not</em> "getPropertyName"].)
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| 18 | *
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18 | *
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| 19 | * The getter or setter would then access the non-public property
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19 | * The getter or setter would then access the non-public property
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| 20 | * whose name is the name of the accessed property prefixed with
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20 | * whose name is the name of the accessed property prefixed with
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| 21 | * underscore ('_'), called the <em>underscore property</em>.
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21 | * underscore ('_'), called the <em>underscore property</em>.
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| 22 | * It can make sure that the value of the underscore property is
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22 | * It can make sure that the value of the underscore property is
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| 23 | * of a specific type or within a specific range, i. e. perform
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23 | * of a specific type or within a specific range, i. e. perform
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| 24 | * automatic type conversion, normalize values that are out of
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24 | * automatic type conversion, normalize values that are out of
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| 25 | * range when the property is read, and reject/ignore attempts
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25 | * range when the property is read, and reject/ignore attempts
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| 26 | * to set unsuitable property values. This is particularly useful
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26 | * to set unsuitable property values. This is particularly useful
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| 27 | * with instances of model classes; see {@link AbstractModel} and
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27 | * with instances of model classes; see {@link AbstractModel} and
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| 28 | * {@link Model}.
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28 | * {@link Model}.
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| 29 | *
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29 | *
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| 30 | * Properties that do not have a getter are not available
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30 | * Properties that do not have a getter are not available
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| 31 | * from unprivileged context, and an exception is thrown
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31 | * from unprivileged context, and an exception is thrown
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| 32 | * when attempting to read from them there.
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32 | * when attempting to read from them there.
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| 33 | *
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33 | *
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| 34 | * Properties that do not have a setter are effectively
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34 | * Properties that do not have a setter are effectively
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| 35 | * <em>read-only</em> from unprivileged context, and
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35 | * <em>read-only</em> from unprivileged context, and
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| 36 | * an exception is thrown when attempting to write to them there.
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36 | * an exception is thrown when attempting to write to them there.
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| 37 | *
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37 | *
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| 38 | * @author Thomas 'PointedEars' Lahn
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38 | * @author Thomas 'PointedEars' Lahn
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| 39 | */
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39 | */
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| 40 | abstract class Base |
40 | abstract class Base |
| 41 | {
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41 | {
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| 42 | /**
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42 | /**
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| - | 43 | * Determines if a strict model is enforced.
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| - | 44 | *
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| - | 45 | * If <code>true</code>, all publicly accessible properties
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| - | 46 | * must have a getter if readable, and a setter if writable.
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| - | 47 | * Otherwise, accesses to non-existing public properties will be
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| - | 48 | * forwarded to the correspnding underline property if no getter
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| - | 49 | * or setter has been defined for it. The default is
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| - | 50 | * <code>false</code> (non-strict) as that speeds up property
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| - | 51 | * accesses and eases implementation considerably.
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| - | 52 | *
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| - | 53 | * @var bool
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|
| - | 54 | */
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|
| - | 55 | protected static $_strict = false; |
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| - | 56 | ||
| - | 57 | /**
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|
| 43 | * Retrieves a property value.
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58 | * Retrieves a property value.
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| 44 | *
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59 | *
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| 45 | * Automagically called when attempting to read data
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60 | * Automagically called when attempting to read data
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| 46 | * from inaccessible properties.
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61 | * from inaccessible properties.
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| 47 | *
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62 | *
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| 48 | * @param string $name
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63 | * @param string $name
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| 49 | * Property name
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64 | * Property name
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| 50 | * @throws InvalidArgumentException
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65 | * @throws InvalidArgumentException
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| 51 | * if the underscore property for the property
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66 | * if the underscore property for the property
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| 52 | * named <code><var>$name</var></code> does not exist
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67 | * named <code><var>$name</var></code> does not exist
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| 53 | * or has no getter
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68 | * or has no getter
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| 54 | * @return mixed
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69 | * @return mixed
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| 55 | * Return value of the property-specific getter
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70 | * Return value of the property-specific getter
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| 56 | */
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71 | */
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| 57 | public function __get ($name) |
72 | public function __get ($name) |
| 58 | {
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73 | {
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| 59 | $getter = 'get' . ucfirst($name); |
74 | $getter = 'get' . ucfirst($name); |
| 60 | if (method_exists($this, $getter)) |
75 | if (method_exists($this, $getter)) |
| 61 | {
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76 | {
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| 62 | return $this->$getter(); |
77 | return $this->$getter(); |
| 63 | }
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78 | }
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| 64 | 79 | ||
| 65 | if (property_exists($this, "_$name")) |
80 | if (property_exists($this, "_$name")) |
| 66 | {
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81 | {
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| - | 82 | $class = get_class($this); |
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| - | 83 | if ($class::$_strict) |
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| - | 84 | {
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| 67 | throw new \InvalidArgumentException("Property '{$name}' has no getter"); |
85 | throw new \InvalidArgumentException("Strict model: Property '{$name}' has no getter"); |
| - | 86 | }
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|
| - | 87 | ||
| - | 88 | return $this->{"_$name"}; |
|
| 68 | }
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89 | }
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| 69 | 90 | ||
| 70 | throw new \InvalidArgumentException("No such property: '{$name}'"); |
91 | throw new \InvalidArgumentException("No such property: '{$name}'"); |
| 71 | }
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92 | }
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| 72 | 93 | ||
| 73 | /**
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94 | /**
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| 74 | * Sets a property value.
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95 | * Sets a property value.
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| 75 | *
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96 | *
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| 76 | * Automagically called when attempting to write data
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97 | * Automagically called when attempting to write data
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| 77 | * to inaccessible properties.
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98 | * to inaccessible properties.
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| 78 | *
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99 | *
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| 79 | * @param string $name
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100 | * @param string $name
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| 80 | * Property name
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101 | * Property name
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| 81 | * @param mixed $value
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102 | * @param mixed $value
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| 82 | * Property value
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103 | * Property value
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| 83 | * @throws InvalidArgumentException
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104 | * @throws InvalidArgumentException
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| 84 | * if the protected underscore property for the property
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105 | * if the protected underscore property for the property
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| 85 | * named <code><var>$name</var></code> does not exist
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106 | * named <code><var>$name</var></code> does not exist
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| 86 | * or has no setter (is read-only)
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107 | * or has no setter (is read-only)
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| 87 | * @return mixed
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108 | * @return mixed
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| 88 | * Return value of the property-specific setter
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109 | * Return value of the property-specific setter
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| 89 | */
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110 | */
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| 90 | public function __set ($name, $value) |
111 | public function __set ($name, $value) |
| 91 | {
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112 | {
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| 92 | $setter = 'set' . ucfirst($name); |
113 | $setter = 'set' . ucfirst($name); |
| 93 | if (method_exists($this, $setter)) |
114 | if (method_exists($this, $setter)) |
| 94 | {
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115 | {
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| 95 | return $this->$setter($value); |
116 | return $this->$setter($value); |
| 96 | }
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117 | }
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| 97 | 118 | ||
| 98 | if (property_exists($this, "_$name")) |
119 | if (property_exists($this, "_$name")) |
| 99 | {
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120 | {
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| - | 121 | $class = get_class($this); |
|
| - | 122 | if ($class::$_strict) |
|
| - | 123 | {
|
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| 100 | throw new \InvalidArgumentException("Property '{$name}' has no setter"); |
124 | throw new \InvalidArgumentException("Strict model: Property '{$name}' has no setter"); |
| - | 125 | }
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|
| - | 126 | ||
| - | 127 | $this->{"_$name"} = $value; |
|
| - | 128 | return $value; |
|
| 101 | }
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129 | }
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| 102 | 130 | ||
| 103 | throw new \InvalidArgumentException("No such property: '{$name}'"); |
131 | throw new \InvalidArgumentException("No such property: '{$name}'"); |
| 104 | }
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132 | }
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| 105 | }
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133 | }
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