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ParameterScanner.php
001 <?php
002 /**
003 * Zend Framework (http://framework.zend.com/)
004 *
005 * @link http://github.com/zendframework/zf2 for the canonical source repository
006 * @copyright Copyright (c) 2005-2016 Zend Technologies USA Inc. (http://www.zend.com)
007 * @license http://framework.zend.com/license/new-bsd New BSD License
008 */
009
010 namespace Zend\Code\Scanner;
011
012 use Zend\Code\NameInformation;
013
014 use function current;
015 use function is_string;
016 use function ltrim;
017 use function next;
018 use function reset;
019 use function trim;
020
021 class ParameterScanner
022 {
023 /**
024 * @var bool
025 */
026 protected $isScanned = false;
027
028 /**
029 * @var null|ClassScanner
030 */
031 protected $declaringScannerClass;
032
033 /**
034 * @var null|string
035 */
036 protected $declaringClass;
037
038 /**
039 * @var null|MethodScanner
040 */
041 protected $declaringScannerFunction;
042
043 /**
044 * @var null|string
045 */
046 protected $declaringFunction;
047
048 /**
049 * @var null|string
050 */
051 protected $defaultValue;
052
053 /**
054 * @var null|string
055 */
056 protected $class;
057
058 /**
059 * @var null|string
060 */
061 protected $name;
062
063 /**
064 * @var null|int
065 */
066 protected $position;
067
068 /**
069 * @var bool
070 */
071 protected $isArray = false;
072
073 /**
074 * @var bool
075 */
076 protected $isDefaultValueAvailable = false;
077
078 /**
079 * @var bool
080 */
081 protected $isOptional = false;
082
083 /**
084 * @var bool
085 */
086 protected $isPassedByReference = false;
087
088 /**
089 * @var array|null
090 */
091 protected $tokens;
092
093 /**
094 * @var null|NameInformation
095 */
096 protected $nameInformation;
097
098 /**
099 * @param array $parameterTokens
100 * @param NameInformation $nameInformation
101 */
102 public function __construct(array $parameterTokens, NameInformation $nameInformation = null)
103 {
104 $this->tokens = $parameterTokens;
105 $this->nameInformation = $nameInformation;
106 }
107
108 /**
109 * Set declaring class
110 *
111 * @param string $class
112 * @return void
113 */
114 public function setDeclaringClass($class)
115 {
116 $this->declaringClass = (string) $class;
117 }
118
119 /**
120 * Set declaring scanner class
121 *
122 * @param ClassScanner $scannerClass
123 * @return void
124 */
125 public function setDeclaringScannerClass(ClassScanner $scannerClass)
126 {
127 $this->declaringScannerClass = $scannerClass;
128 }
129
130 /**
131 * Set declaring function
132 *
133 * @param string $function
134 * @return void
135 */
136 public function setDeclaringFunction($function)
137 {
138 $this->declaringFunction = $function;
139 }
140
141 /**
142 * Set declaring scanner function
143 *
144 * @param MethodScanner $scannerFunction
145 * @return void
146 */
147 public function setDeclaringScannerFunction(MethodScanner $scannerFunction)
148 {
149 $this->declaringScannerFunction = $scannerFunction;
150 }
151
152 /**
153 * Set position
154 *
155 * @param int $position
156 * @return void
157 */
158 public function setPosition($position)
159 {
160 $this->position = $position;
161 }
162
163 /**
164 * Scan
165 *
166 * @return void
167 */
168 protected function scan()
169 {
170 if ($this->isScanned) {
171 return;
172 }
173
174 $tokens = &$this->tokens;
175
176 reset($tokens);
177
178 SCANNER_TOP:
179
180 $token = current($tokens);
181
182 if (is_string($token)) {
183 // check pass by ref
184 if ($token === '&') {
185 $this->isPassedByReference = true;
186 goto SCANNER_CONTINUE;
187 }
188 if ($token === '=') {
189 $this->isOptional = true;
190 $this->isDefaultValueAvailable = true;
191 goto SCANNER_CONTINUE;
192 }
193 } else {
194 if ($this->name === null && ($token[0] === T_STRING || $token[0] === T_NS_SEPARATOR)) {
195 $this->class .= $token[1];
196 goto SCANNER_CONTINUE;
197 }
198 if ($token[0] === T_VARIABLE) {
199 $this->name = ltrim($token[1], '$');
200 goto SCANNER_CONTINUE;
201 }
202 }
203
204 if ($this->name !== null) {
205 $this->defaultValue .= trim(is_string($token) ? $token : $token[1]);
206 }
207
208 SCANNER_CONTINUE:
209
210 if (next($this->tokens) === false) {
211 goto SCANNER_END;
212 }
213 goto SCANNER_TOP;
214
215 SCANNER_END:
216
217 if ($this->class && $this->nameInformation) {
218 $this->class = $this->nameInformation->resolveName($this->class);
219 }
220
221 $this->isScanned = true;
222 }
223
224 /**
225 * Get declaring scanner class
226 *
227 * @return ClassScanner
228 */
229 public function getDeclaringScannerClass()
230 {
231 return $this->declaringScannerClass;
232 }
233
234 /**
235 * Get declaring class
236 *
237 * @return string
238 */
239 public function getDeclaringClass()
240 {
241 return $this->declaringClass;
242 }
243
244 /**
245 * Get declaring scanner function
246 *
247 * @return MethodScanner
248 */
249 public function getDeclaringScannerFunction()
250 {
251 return $this->declaringScannerFunction;
252 }
253
254 /**
255 * Get declaring function
256 *
257 * @return string
258 */
259 public function getDeclaringFunction()
260 {
261 return $this->declaringFunction;
262 }
263
264 /**
265 * Get default value
266 *
267 * @return string
268 */
269 public function getDefaultValue()
270 {
271 $this->scan();
272
273 return $this->defaultValue;
274 }
275
276 /**
277 * Get class
278 *
279 * @return string
280 */
281 public function getClass()
282 {
283 $this->scan();
284
285 return $this->class;
286 }
287
288 /**
289 * Get name
290 *
291 * @return string
292 */
293 public function getName()
294 {
295 $this->scan();
296
297 return $this->name;
298 }
299
300 /**
301 * Get position
302 *
303 * @return int
304 */
305 public function getPosition()
306 {
307 $this->scan();
308
309 return $this->position;
310 }
311
312 /**
313 * Check if is array
314 *
315 * @return bool
316 */
317 public function isArray()
318 {
319 $this->scan();
320
321 return $this->isArray;
322 }
323
324 /**
325 * Check if default value is available
326 *
327 * @return bool
328 */
329 public function isDefaultValueAvailable()
330 {
331 $this->scan();
332
333 return $this->isDefaultValueAvailable;
334 }
335
336 /**
337 * Check if is optional
338 *
339 * @return bool
340 */
341 public function isOptional()
342 {
343 $this->scan();
344
345 return $this->isOptional;
346 }
347
348 /**
349 * Check if is passed by reference
350 *
351 * @return bool
352 */
353 public function isPassedByReference()
354 {
355 $this->scan();
356
357 return $this->isPassedByReference;
358 }
359 }
360