framework/main/classes/iterator/registry/class_RegistryIterator.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Iterator\Registry;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\EntryPoint\ApplicationEntryPoint;
   7 use Org\Mxchange\CoreFramework\Generic\FrameworkInterface;
   8 use Org\Mxchange\CoreFramework\Generic\NullPointerException;
   9 use Org\Mxchange\CoreFramework\Iterator\BaseIterator;
  10 use Org\Mxchange\CoreFramework\Registry\Register;
  11 use Org\Mxchange\CoreFramework\Registry\Registerable;
  12 use Org\Mxchange\CoreFramework\Registry\Sub\SubRegistry;
  13 use Org\Mxchange\CoreFramework\Traits\Registry\RegisterTrait;
  14
  15 // Import SPL stuff
  16 use \BadMethodCallException;
  17 use \LogicException;
  18
  19 /**
  20  * A registry iterator
  21  *
  22  * @author              Roland Haeder <webmaster@ship-simu.org>
  23  * @version             0.0.0
  24  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2021 Core Developer Team
  25  * @license             GNU GPL 3.0 or any newer version
  26  * @link                http://www.ship-simu.org
  27  *
  28  * This program is free software: you can redistribute it and/or modify
  29  * it under the terms of the GNU General Public License as published by
  30  * the Free Software Foundation, either version 3 of the License, or
  31  * (at your option) any later version.
  32  *
  33  * This program is distributed in the hope that it will be useful,
  34  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  35  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  36  * GNU General Public License for more details.
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  40  */
  41 class RegistryIterator extends BaseIterator implements IteratableRegistry {
  42         // Load traits
  43         use RegisterTrait;
  44
  45         /**
  46          * All found registry keys
  47          */
  48         private $registryKeys = [];
  49
  50         /**
  51          * An array containing keys ob sub-registries which keys should only be
  52          * included in the iterator.
  53          */
  54         private $onlyRegistries = [];
  55
  56         /**
  57          * Current array key
  58          */
  59         private $key = NULL;
  60
  61         /**
  62          * Protected constructor
  63          *
  64          * @return      void
  65          */
  66         private function __construct () {
  67                 // Call parent constructor
  68                 parent::__construct(__CLASS__);
  69
  70                 // Init registry keys array
  71                 $this->registryKeys = [
  72                         // Generic registry
  73                         'generic' => [],
  74                         // Instance registry
  75                         'instance' => [],
  76                 ];
  77         }
  78
  79         /**
  80          * Creates an instance of this class
  81          *
  82          * @param       $registryInstance       An instance of a Register class
  83          * @return      $iteratorInstance       An instance of a Iterator class
  84          */
  85         public final static function createRegistryIterator (Register $registryInstance) {
  86                 // Get new instance
  87                 $iteratorInstance = new RegistryIterator();
  88
  89                 // Set registry here
  90                 $iteratorInstance->setRegistryInstance($registryInstance);
  91
  92                 // Return the prepared instance
  93                 return $iteratorInstance;
  94         }
  95
  96         /**
  97          * Setter for only-registries array
  98          *
  99          * @param       $onlyRegistries         Array with keys only being iterated over
 100          * @return      void
 101          */
 102         private function setOnlyRegistries (array $onlyRegistries) {
 103                 $this->onlyRegistries = $onlyRegistries;
 104         }
 105
 106         /**
 107          * Initializes this iterator by scanning over the registry for all keys.
 108          *
 109          * @param       $onlyRegistries         Only iterate on these sub-registry keys, default is all
 110          * @return      void
 111          * @throws      LogicException  If a registry entry does not implement Registerable
 112          * @throws      NullPointerException    If criteriaKey or criteriaMethod is not set but a call-back instance is set
 113          */
 114         public function initIterator (array $onlyRegistries = []) {
 115                 // Set it in this registry
 116                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR: onlyRegistries()=%d - CALLED!', count($onlyRegistries)));
 117                 $this->setOnlyRegistries($onlyRegistries);
 118
 119                 // Get generic registry entries from it
 120                 $entries = $this->getRegistryInstance()->getGenericRegistry();
 121
 122                 // Anything in there?
 123                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[generic]: entries()=%d', count($entries)));
 124                 if (count($entries) > 0) {
 125                         // Debugging:
 126                         /* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: UNFINISHED: entries=%s', __METHOD__, __LINE__, print_r($entries, TRUE)));
 127                 }
 128
 129                 // Get instance registry entries from it
 130                 $entries = $this->getRegistryInstance()->getInstanceRegistry();
 131
 132                 // Anything in there?
 133                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: entries()=%d', count($entries)));
 134                 if (count($entries) > 0) {
 135                         // Then run over all
 136                         foreach ($entries as $key => $entry) {
 137                                 // Is an unwanted registry found?
 138                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: key=%s,entry[]=%s', $key, gettype($entry)));
 139                                 if (substr($key, -8, 8) == 'registry') {
 140                                         // Skip this!
 141                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: key=%s is a registry key, skipping ...', $key));
 142                                         continue;
 143                                 }
 144
 145                                 // Is it an instance of a sub-registry?
 146                                 if (count($onlyRegistries) > 0 && !in_array($key, $onlyRegistries, TRUE)) {
 147                                         // Not in requested registries
 148                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: key=%s is not wanted, skipping ...', $key));
 149                                         continue;
 150                                 } elseif ($entry instanceof SubRegistry) {
 151                                         // Get iterator from this instance
 152                                         $subRegistryInstances = $entry->getInstanceRegistry();
 153
 154                                         // Add all sub-registry keys to this registry keys array
 155                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: subRegistryInstances()=%d', count($subRegistryInstances)));
 156                                         //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: key=%s,subRegistryInstances=%s', __METHOD__, __LINE__, $key, print_r($subRegistryInstances, TRUE)));
 157                                         foreach (array_keys($subRegistryInstances) as $subKey) {
 158                                                 // Add it
 159                                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: Adding key=%s,subKey=%s ...', $key, $subKey));
 160                                                 array_push($this->registryKeys['instance'], $subKey);
 161
 162                                                 // Is the current key set?
 163                                                 if (is_null($this->key)) {
 164                                                         // Init key
 165                                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: Setting subKey=%s as first key ...', $subKey));
 166                                                         $this->key = $subKey;
 167                                                 }
 168                                         }
 169
 170                                         // Skip below code
 171                                         continue;
 172                                 } elseif (!($entry instanceof Registerable)) {
 173                                         // Not registerable?!
 174                                         throw new LogicException(sprintf('entry[]=%s does not implement Registerable.', gettype($entry)));
 175                                 }
 176
 177                                 // Is the current key set?
 178                                 if (is_null($this->key)) {
 179                                         // Init key
 180                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: Setting key=%s as first key ...', $key));
 181                                         $this->key = $key;
 182                                 }
 183
 184                                 // Add key to array
 185                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[instance]: key=%s - Adding ...', $key));
 186                                 //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: key=%s,entry=%s', __METHOD__, __LINE__, $key, print_r($entry, TRUE)));
 187                                 array_push($this->registryKeys['instance'], $key);
 188                         }
 189                 }
 190
 191                 // Trace message
 192                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('REGISTRY-ITERATOR: EXIT!');
 193         }
 194
 195         /**
 196          * Getter for all registry keys (array)
 197          *
 198          * @return      $registryKeys   Registry keys
 199          */
 200         public final function getRegistryKeys () {
 201                 // Return it
 202                 return $this->registryKeys;
 203         }
 204
 205         /**
 206          * Getter for current value from group or generic
 207          *
 208          * @return      $current        Current value in iteration
 209          * @throws      NullPointerException    If current key points to a non-existing entry in searched registries
 210          */
 211         public function current () {
 212                 // Default is null
 213                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: CALLED!', $this->key()));
 214                 //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: this->key(%d)[%s]=%s,this->valid=%d,this->registryKeys=%s', __METHOD__, __LINE__, strlen($this->key()), gettype($this->key()), $this->key(), intval($this->valid()), print_r($this->registryKeys, TRUE)));
 215                 $current = NULL;
 216                 $entries = [];
 217
 218                 // Get all registries
 219                 $allRegistries = $this->getRegistryInstance()->getInstanceRegistry();
 220
 221                 // Loop through all sub-sets
 222                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: allRegistries()=%d', $this->key(), count($allRegistries)));
 223                 foreach ($allRegistries as $registryKey => $registryInstance) {
 224                         // Is this key wanted?
 225                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: registryKey=%s', $this->key(), $registryKey));
 226                         if (count($this->onlyRegistries) == 0 || in_array($registryKey, $this->onlyRegistries)) {
 227                                 // Yes, then loop through them only
 228                                 $instances = $registryInstance->getInstanceRegistry();
 229
 230                                 // The key should be there
 231                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: Handling registryKey=%s ...', $this->key(), $registryKey));
 232                                 //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: instances=%s', __METHOD__, __LINE__, print_r($instances, TRUE)));
 233                                 if (!isset($instances[$this->key()])) {
 234                                         // Skip below code
 235                                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: registryKey=%s has no this->key=%s, skipping ...', $this->key(), $registryKey));
 236                                         continue;
 237                                 }
 238
 239                                 // Set as current element and leave loop
 240                                 $current = $instances[$this->key()];
 241                                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: registryKey=%s,current=%s found. - BREAK!', $this->key(), $registryKey, $current->__toString()));
 242                                 break;
 243                         }
 244                 }
 245
 246                 // Is current still NULL?
 247                 if (is_null($current)) {
 248                         // This cannot happen and indicates a logic error
 249                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
 250                 }
 251
 252                 // Return it
 253                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: current[%s]=%s - EXIT!', $this->key(), gettype($current), $current));
 254                 return $current;
 255         }
 256
 257         /**
 258          * Getter for key from group or generic
 259          *
 260          * @return      $key    Current key in iteration
 261          */
 262         public function key () {
 263                 // Return it
 264                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: EXIT!', $this->key));
 265                 return $this->key;
 266         }
 267
 268         /**
 269          * Advances to the next entry
 270          *
 271          * @return      void
 272          * @throws      BadMethodCallException  If $this->valid() returns FALSE
 273          * @throws      UnexpectedValueException        If $registryType is not changed
 274          */
 275         public function next () {
 276                 // Is valid() still TRUE?
 277                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: CALLED!', $this->key()));
 278                 //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: this->key(%d)[%s]=%s,this->valid=%d,this->registryKeys=%s', __METHOD__, __LINE__, strlen($this->key()), gettype($this->key()), $this->key(), intval($this->valid()), print_r($this->registryKeys, TRUE)));
 279                 if (!$this->valid()) {
 280                         // Bad method call!
 281                         throw new BadMethodCallException(sprintf('this->key[%s]=%s is no longer valid, but method was called.', gettype($this->key()), $this->key()));
 282                 } elseif ((count($this->registryKeys['generic']) == 0) && (count($this->registryKeys['instance']) == 0)) {
 283                         // Both arrays are empty
 284                         throw new BadMethodCallException('No array elements in "generic" and "instance" found but method called.');
 285                 }
 286
 287                 // Default is not valid
 288                 $nextIndex = -1;
 289                 $isNextValid = FALSE;
 290                 $registryType = 'invalid';
 291
 292                 // Get first array element ...
 293                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: this->registryKeys[generic]()=%d,this->registryKeys[instance]()=%d', $this->key(), count($this->registryKeys['generic']), count($this->registryKeys['instance'])));
 294                 if (count($this->registryKeys['generic']) > 0) {
 295                         // First generic array
 296                         /* UNFINISHED */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: this->key(%d)[%s]=%s,this->valid=%d,this->registryKeys=%s', __METHOD__, __LINE__, strlen($this->key()), gettype($this->key()), $this->key(), intval($this->valid()), print_r($this->registryKeys, TRUE)));
 297                 } elseif (count($this->registryKeys['instance']) > 0) {
 298                         // Second instance, current key's index + 1
 299                         $nextIndex = array_search($this->key(), $this->registryKeys['instance']) + 1;
 300                         $isNextValid = isset($this->registryKeys['instance'][$nextIndex]);
 301                         $registryType = 'instance';
 302                 }
 303
 304                 // Is it still valid?
 305                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: isNextValid=%d', $this->key(), intval($isNextValid)));
 306                 if (!$isNextValid) {
 307                         // Throw exception
 308                         throw new BadMethodCallException(sprintf('this->key=%s is last key in this iteration. Forgot to invoke valid() before?', $this->key()));
 309                 } elseif ($registryType == 'invalid') {
 310                         // Not changed!
 311                         throw new UnexpectedValueException('registryType has not been changed.');
 312                 }
 313
 314                 // Yes, then advance to that entry
 315                 $this->key = $this->registryKeys[$registryType][$nextIndex];
 316
 317                 // Trace message
 318                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: EXIT!', $this->key()));
 319         }
 320
 321         /**
 322          * Rewinds to the beginning of the iteration
 323          *
 324          * @return      void
 325          * @throws      BadMethodCallException  If $this->key is already the first element
 326          */
 327         public function rewind () {
 328                 // Is current key first key?
 329                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: CALLED!', $this->key()));
 330                 //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: this->key(%d)[%s]=%s,this->valid=%d,this->registryKeys=%s', __METHOD__, __LINE__, strlen($this->key()), gettype($this->key()), $this->key(), intval($this->valid()), print_r($this->registryKeys, TRUE)));
 331                 if (array_search($this->key(), $this->getRegistryKeys()) === 0) {
 332                         // rewind() cannot rewind first entry!
 333                         throw new BadMethodCallException(sprintf('this->key=%s is already first element, but method was called.', $this->key()));
 334                 } elseif ((count($this->registryKeys['generic']) == 0) && (count($this->registryKeys['instance']) == 0)) {
 335                         // Both arrays are empty
 336                         throw new BadMethodCallException('No array elements in "generic" and "instance" found but method called.');
 337                 }
 338
 339                 // Get first array element ...
 340                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: this->registryKeys[generic]()=%d,this->registryKeys[instance]()=%d', $this->key(), count($this->registryKeys['generic']), count($this->registryKeys['instance'])));
 341                 if (count($this->registryKeys['generic']) > 0) {
 342                         // First generic array
 343                         /* UNFINISHED */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: this->key(%d)[%s]=%s,this->valid=%d,this->registryKeys=%s', __METHOD__, __LINE__, strlen($this->key()), gettype($this->key()), $this->key(), intval($this->valid()), print_r($this->registryKeys, TRUE)));
 344                 } elseif (count($this->registryKeys['instance']) > 0) {
 345                         // Second instance
 346                         $this->key = $this->registryKeys['instance'][0];
 347                 }
 348
 349                 // Trace message
 350                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: EXIT!', $this->key()));
 351         }
 352
 353         /**
 354          * Checks wether the current entry is valid (not at the end of the list)
 355          *
 356          * @return      $valid  Whether the current key is still valid
 357          */
 358         public function valid () {
 359                 // Is the element there?
 360                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: CALLED!', $this->key()));
 361                 //* DEBUG-DIE: */ ApplicationEntryPoint::exitApplication(sprintf('[%s:%d]: this->key(%d)[%s]=%s,this->registryKeys=%s', __METHOD__, __LINE__, strlen($this->key()), gettype($this->key()), $this->key(), print_r($this->registryKeys, TRUE)));
 362                 $valid = (in_array($this->key(), $this->registryKeys['instance']) || in_array($this->key(), $this->registryKeys['generic']));
 363
 364                 // Return flag
 365                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('REGISTRY-ITERATOR[%s]: valid=%d - EXIT!', $this->key(), intval($valid)));
 366                 return $valid;
 367         }
 368
 369 }