PHP Object-oriented Identity object

2. /*
4. Identity object Pattern
6. The main function of this mode is to create the Wehre condition string in the SQL statement, and look directly at the code and comments below:
10. */
12. namespace Woo\mapper;
18. Field Object
20. Class Field {
22. protected $name = null; Field name
24. protected $operator = null; Operator
26. Protected $comps = Array (); Array of storage conditions
28. protected $incomplete = false; Checks if the condition array has a value
32. function __construct ($name) {
34. $this->name= $name;
36. }
40. Add a Where condition
42. function Addtest ($operator, $value) {
44. $this->comps[] = Array (' name ' = = $this->name, ' operator ' = $operator, ' value ' = $value);
46. }
50. Gets the array that holds the condition
52. function Getcomps () {
54. return $this->comps;
56. }
60. function Isincomplete () {
62. return empty ($this->comps);
64. }
66. }
72. Identifying objects
74. Class Identityobject {
76. protected $currentfield = null; Field object for the current action
78. Protected $fields = Array (); Field Collection
80. Private $and = null;
82. Private $enforce = Array (); Qualified legal fields
86. function __construct ($field = null, array $enforce = null) {
88. if (!is_null ($enforce)) {
90. $this->enforce = $enforce;
92. }
94. if (!is_null ($field)) {
96. $this->field ($field);
98. }
100. }
104. Get qualified legal fields
106. function Getobjectfields () {
108. return $this->enforce;
110. }
114. The main function is to set the object that is currently required to operate
116. function field ($fieldname) {
118. if (! $this->isvoid () && $this->currentfield->isincomplete ()) {
120. throw new \exception ("incomplete field");
122. }
124. $this->enforcefield ($fieldname);
126. if (Isset ($this->fields[$fieldname]) {
128. $this->currentfield = $this->fields[$fieldname];
130. } else {
132. $this->currentfield = new Field ($fieldname);
134. $this->fields[$fieldname] = $this->currentfield;
136. }
138. return $this; Use coherent syntax
140. }
144. Whether the field collection is empty
146. function Isvoid () {
148. return empty ($this->fields);
150. }
154. Check if the field is legal
156. function Enforcefield ($fieldname) {
158. if (!in_array ($fieldname, $this->enforce) &&!empty ($this->enforce)) {
160. $forcelist = Implode (', ', $this->enforce);
162. throw new \exception ("{$fieldname} not a legal field {$forcelist}");
164. }
166. }
172. Add a Where condition to a Field object
174. function eq ($value) {
176. return $this->operator ("=", $value);
178. }
182. Function lt ($value) {
184. return $this->operator ("<", $value);
186. }
190. function GT ($value) {
192. return $this->operator (">", $value);
194. }
198. Add a Where condition to a Field object
200. Private function operator ($symbol, $value) {
202. if ($this->isvoid) {
204. throw new \exception ("No object field defined");
206. }
208. $this->currentfield->addtest ($symbol, $value);
210. return $this; Use coherent syntax
212. }
216. Gets an array of where conditions for all the Field object collections in this class
218. function Getcomps () {
220. $ret = Array ();
222. foreach ($this->fields as $key = + $field) {
224. $ret = Array_merge ($ret, $field->getcomps ());
226. }
228. return $ret;
230. }
232. }
236. Client code
238. $idobj = new Identityobject ();
240. $idobj->field ("name")->eq ("The Good Show")->field ("Start")->gt (Time ())->lt (Time () + (24*60*60));
242. $test = $idobj->getcomps ();
244. Var_dump ($test);
248. Output similar to the following content
252. /*
254. array{
256. Array (' name ' = = ' name ', ' operator ' = ' = ', ' value ' = ' The Good Show '),
258. Array (' name ' = = ' start ', ' operator ' = ' > ', ' value ' = ' 123456 '),//123456 represents the time () function output timestamp
260. Array (' name ' = ' start ', ' operator ' = ' < ', ' value ' = ' 123456 ')
262. }
266. */

PHP Object-oriented Identity object