/**
* A general Stacker
*
- * @author Roland Haeder <webmaster@ship-simu.org>
+ * @author Roland Haeder <webmaster@shipsimu.org>
* @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009, 2010 Core Developer Team
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Core Developer Team
* @license GNU GPL 3.0 or any newer version
- * @link http://www.ship-simu.org
+ * @link http://www.shipsimu.org
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
const EXCEPTION_NO_STACKER_FOUND = 0x052;
const EXCEPTION_STACKER_IS_EMPTY = 0x053;
- /**
- * An array holding all stacks
- */
- private $stacks = array();
-
/**
* Protected constructor
*
* Initializes given stacker
*
* @param $stackerName Name of the stack
+ * @param $forceReInit Force re-initialization
* @return void
* @throws AlreadyInitializedStackerException If the stack is already initialized
*/
- protected final function initStacker ($stackerName) {
+ public function initStack ($stackerName, $forceReInit = FALSE) {
// Is the stack already initialized?
- if ($this->isStackInitialized($stackerName)) {
+ if (($forceReInit === FALSE) && ($this->isStackInitialized($stackerName))) {
// Then throw the exception
- throw new AlreadyInitializedStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_ALREADY_INITIALIZED);
+ throw new AlreadyInitializedStackerException(array($this, $stackerName, $forceReInit), self::EXCEPTION_STACKER_ALREADY_INITIALIZED);
} // END - if
// Initialize the given stack
- $this->stacks[$stackerName] = array(
- 'max_size' => $this->getConfigInstance()->getConfigEntry('stacker_' . $stackerName . '_max_size'),
- 'entries' => array()
- );
+ $this->initGenericArrayKey('stacks', $stackerName, 'entries', $forceReInit);
+ }
+
+ /**
+ * Initializes all stacks
+ *
+ * @return void
+ */
+ public function initStacks (array $stacks, $forceReInit = FALSE) {
+ // "Walk" through all (more will be added as needed
+ foreach ($stacks as $stackerName) {
+ // Init this stack
+ $this->initStack($stackerName, $forceReInit);
+ } // END - foreach
}
/**
- * Checks wether the given stack is initialized (set in array $stackers)
+ * Checks whether the given stack is initialized (set in array $stackers)
*
* @param $stackerName Name of the stack
- * @return $isInitialized Wether the stack is initialized
+ * @return $isInitialized Whether the stack is initialized
*/
- public final function isStackInitialized ($stackerName) {
+ public function isStackInitialized ($stackerName) {
// Is is there?
- $isInitialized = ((isset($this->stacks[$stackerName])) && (is_array($this->stacks[$stackerName])));
+ $isInitialized = ($this->isValidGenericArrayKey('stacks', $stackerName, 'entries'));
// Return result
return $isInitialized;
}
/**
- * Checks wether the given stack is full
+ * Checks whether the given stack is full
*
* @param $stackerName Name of the stack
- * @return $isFull Wether the stack is full
+ * @return $isFull Whether the stack is full
* @throws NoStackerException If given stack is missing
*/
- protected final function isStackFull ($stackerName) {
+ protected function isStackFull ($stackerName) {
// Is the stack not yet initialized?
if (!$this->isStackInitialized($stackerName)) {
// Throw an exception
}
/**
- * Checks wether the given stack is empty
+ * Checks whether the given stack is empty
*
- * @param $stackerName Name of the stack
- * @return $isEmpty Wether the stack is empty
+ * @param $stackerName Name of the stack
+ * @return $isEmpty Whether the stack is empty
* @throws NoStackerException If given stack is missing
*/
- public final function isStackEmpty ($stackerName) {
+ public function isStackEmpty ($stackerName) {
// Is the stack not yet initialized?
if (!$this->isStackInitialized($stackerName)) {
// Throw an exception
throw new NoStackerException(array($this, $stackerName), self::EXCEPTION_NO_STACKER_FOUND);
} // END - if
- // So, is the stack full?
- $isFull = (($this->getStackCount($stackerName)) == 0);
+ // So, is the stack empty?
+ $isEmpty = (($this->getStackCount($stackerName)) == 0);
// Return result
- return $isFull;
+ return $isEmpty;
}
/**
* @return $count Size of stack (array count)
* @throws NoStackerException If given stack is missing
*/
- protected final function getStackCount ($stackerName) {
+ public function getStackCount ($stackerName) {
// Is the stack not yet initialized?
if (!$this->isStackInitialized($stackerName)) {
// Throw an exception
} // END - if
// Now, count the array of entries
- $count = count($this->stacks[$stackerName]['entries']);
+ $count = $this->countGenericArrayElements('stacks', $stackerName, 'entries');
// Return result
return $count;
* @return void
* @throws FullStackerException Thrown if the stack is full
*/
- protected final function addValue ($stackerName, $value) {
+ protected function addValue ($stackerName, $value) {
// Is the stack not yet initialized or full?
if (!$this->isStackInitialized($stackerName)) {
// Then do it here
- $this->initStacker($stackerName);
+ $this->initStack($stackerName);
} elseif ($this->isStackFull($stackerName)) {
// Stacker is full
throw new FullStackerException(array($this, $stackerName, $value), self::EXCEPTION_STACKER_IS_FULL);
}
// Now add the value to the stack
- array_push($this->stacks[$stackerName]['entries'], $value);
+ $this->pushValueToGenericArrayKey('stacks', $stackerName, 'entries', $value);
}
/**
* @throws NoStackerException If the named stacker was not found
* @throws EmptyStackerException If the named stacker is empty
*/
- protected final function getLastValue ($stackerName) {
+ protected function getLastValue ($stackerName) {
// Is the stack not yet initialized or full?
if (!$this->isStackInitialized($stackerName)) {
// Throw an exception
throw new NoStackerException(array($this, $stackerName), self::EXCEPTION_NO_STACKER_FOUND);
} elseif ($this->isStackEmpty($stackerName)) {
- //Throw an exception
+ // Throw an exception
throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
}
// Now get the last value
- $value = $this->stacks[$stackerName]['entries'][$this->getStackCount($stackerName) - 1];
+ $value = $this->getGenericArrayElement('stacks', $stackerName, 'entries', $this->getStackCount($stackerName) - 1);
+
+ // Return it
+ return $value;
+ }
+
+ /**
+ * Get first value from named stacker
+ *
+ * @param $stackerName Name of the stack
+ * @return $value Value of last added value
+ * @throws NoStackerException If the named stacker was not found
+ * @throws EmptyStackerException If the named stacker is empty
+ */
+ protected function getFirstValue ($stackerName) {
+ // Is the stack not yet initialized or full?
+ if (!$this->isStackInitialized($stackerName)) {
+ // Throw an exception
+ throw new NoStackerException(array($this, $stackerName), self::EXCEPTION_NO_STACKER_FOUND);
+ } elseif ($this->isStackEmpty($stackerName)) {
+ // Throw an exception
+ throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
+ }
+
+ // Now get the first value
+ $value = $this->getGenericArrayElement('stacks', $stackerName, 'entries', 0);
// Return it
return $value;
* "Pops" last entry from stack
*
* @param $stackerName Name of the stack
- * @return void
+ * @return $value Value "poped" from array
* @throws NoStackerException If the named stacker was not found
* @throws EmptyStackerException If the named stacker is empty
*/
- protected final function popLast ($stackerName) {
+ protected function popLast ($stackerName) {
// Is the stack not yet initialized or full?
if (!$this->isStackInitialized($stackerName)) {
// Throw an exception
throw new NoStackerException(array($this, $stackerName), self::EXCEPTION_NO_STACKER_FOUND);
} elseif ($this->isStackEmpty($stackerName)) {
- //Throw an exception
+ // Throw an exception
+ throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
+ }
+
+ // Now, remove the last entry, we don't care about the return value here, see elseif() block above
+ return $this->popGenericArrayElement('stacks', $stackerName, 'entries');
+ }
+
+ /**
+ * "Pops" first entry from stack
+ *
+ * @param $stackerName Name of the stack
+ * @return $value Value "shifted" from array
+ * @throws NoStackerException If the named stacker was not found
+ * @throws EmptyStackerException If the named stacker is empty
+ */
+ protected function popFirst ($stackerName) {
+ // Is the stack not yet initialized or full?
+ if (!$this->isStackInitialized($stackerName)) {
+ // Throw an exception
+ throw new NoStackerException(array($this, $stackerName), self::EXCEPTION_NO_STACKER_FOUND);
+ } elseif ($this->isStackEmpty($stackerName)) {
+ // Throw an exception
throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
}
// Now, remove the last entry, we don't care about the return value here, see elseif() block above
- array_pop($this->stacks[$stackerName]['entries']);
+ return $this->shiftGenericArrayElement('stacks', $stackerName, 'entries');
}
}