diff options
Diffstat (limited to 'framework')
| -rw-r--r-- | framework/Collections/TPriorityList.php | 493 |
1 files changed, 275 insertions, 218 deletions
diff --git a/framework/Collections/TPriorityList.php b/framework/Collections/TPriorityList.php index 2566aeea..6ce93d49 100644 --- a/framework/Collections/TPriorityList.php +++ b/framework/Collections/TPriorityList.php @@ -14,28 +14,33 @@ * TPriorityList class
*
* TPriorityList implements a priority ordered list collection class. It allows you to specify
- * floating numbers for priorities up to a specific precision. There is also a default priority if
- * no priority is specified. If you replace TList with this class it will work exactly the same with
- * priorities set to the default.
+ * any numeric for priorities down to a specific precision. The lower the numeric, the high the priority of the item in the
+ * list. Thus -10 has a higher priority than -5, 0, 10 (the default), 18, 10005, etc. Per {@link round}, precision may be negative and
+ * thus rounding can go by 10, 100, 1000, etc, instead of just .1, .01, .001, etc. The default precision allows for 8 decimal
+ * places. There is also a default priority of 10, if no different default priority is specified or no item specific priority is indicated.
+ * If you replace TList with this class it will work exactly the same with items inserted set to the default priority, until you start
+ * using different priorities than the default priority.
*
- * As you access the array features of this class it flattens and caches the results. It flushes the
- * cache when elements are changed.
+ * As you access the PHP array features of this class, it flattens and caches the results. If at all possible, this
+ * will keep the cache fresh even when manipulated. If this is not possible the cache is cleared.
+ * When an array of items are needed and the cache is outdated, the cache is recreated from the items and their priorities
*
* You can access, append, insert, remove an item by using
- * {@link itemAt}, {@link add}, {@link insertAt}, {@link insertAtPriority}, and {@link remove}.
+ * {@link itemAt}, {@link add}, {@link insertAt}, and {@link remove}.
* To get the number of the items in the list, use {@link getCount}.
* TPriorityList can also be used like a regular array as follows,
* <code>
- * $list[]=$item; // append with the default priority
- * $list[$index]=$item; // $index must be between 0 and $list->Count. This sets the element regardless of priority. Priority stays the same.
+ * $list[]=$item; // append with the default priority. It may not be the last item if other items in the list are prioritized after the default priority
+ * $list[$index]=$item; // $index must be between 0 and $list->Count-1. This sets the element regardless of priority. Priority stays the same.
+ * $list[$index]=$item; // $index is $list->Count. This appends the item to the end of the list with the same priority as the last item in the list.
* unset($list[$index]); // remove the item at $index
* if(isset($list[$index])) // if the list has an item at $index
* foreach($list as $index=>$item) // traverse each item in the list in proper priority order and add/insert order
* $n=count($list); // returns the number of items in the list
* </code>
*
- ** To extend TPriorityList by doing additional operations with each addition or removal
- ** operation, override {@link insertAtIndexInPriority()} and {@link removeAtIndexInPriority()}.
+ * To extend TPriorityList for doing your own operations with each addition or removal,
+ * override {@link insertAtIndexInPriority()} and {@link removeAtIndexInPriority()} and then call the parent.
*
* @author Brad Anderson <javalizard@gmail.com>
* @version $Id: TPriorityList.php 2541 2008-10-21 15:05:13Z javalizard $
@@ -49,34 +54,34 @@ class TPriorityList extends TList */
private $_d=array();
/**
- * @var boolean tells if the _d is currently ordered.
+ * @var boolean indicates if the _d is currently ordered.
*/
- private $_o=0;
+ private $_o=false;
/**
* @var array cached flattened internal data storage
*/
private $_fd=null;
/**
- * @var array cached flattened internal data storage
+ * @var integer number of items contain within the list
*/
private $_c=0;
/**
- * @var numeric the default priority of items added if not specified
+ * @var numeric the default priority of items without specified priorities
*/
private $_dp=10;
/**
- * @var numeric the precision of the floating point priorities within this priority list
+ * @var integer the precision of the numeric priorities within this priority list.
*/
- private $_p=10;
-
+ private $_p=8;
+
/**
* Constructor.
* Initializes the list with an array or an iterable object.
- * @param array|Iterator the intial data. Default is null, meaning no initialization.
+ * @param array|Iterator the intial data. Default is null, meaning no initial data.
* @param boolean whether the list is read-only
- * @param float the default priority of items without priorities.
- * @param numeric the precision of the floating priorities
- * @throws TInvalidDataTypeException If data is not null and neither an array nor an iterator.
+ * @param numeric the default priority of items without specified priorities.
+ * @param integer the precision of the numeric priorities
+ * @throws TInvalidDataTypeException If data is not null and is neither an array nor an iterator.
*/
public function __construct($data=null,$readOnly=false,$defaultPriority=10,$precision=8)
{
@@ -84,10 +89,10 @@ class TPriorityList extends TList if($data!==null)
$this->copyFrom($data);
$this->setReadOnly($readOnly);
- $this->setDefaultPriority($defaultPriority);
$this->setPrecision($precision);
+ $this->setDefaultPriority($defaultPriority);
}
-
+
/**
* Returns the number of items in the list.
* This method is required by Countable interface.
@@ -97,62 +102,66 @@ class TPriorityList extends TList {
return $this->getCount();
}
-
+
/**
+ * Returns the total number of items in the list
* @return integer the number of items in the list
*/
public function getCount()
{
return $this->_c;
}
-
+
/**
- * @param numeric optional priority at which to count items. if no parameter, it takes the default {@link getDefaultPriority}
- * @return int the number of items in the list at the
+ * Gets the number of items at a priority within the list
+ * @param numeric optional priority at which to count items. if no parameter, it will be set to the default {@link getDefaultPriority}
+ * @return integer the number of items in the list at the specified priority
*/
public function getPriorityCount($priority=null)
{
if($priority === null)
- $priority = $this->DefaultPriority;
+ $priority = $this->getDefaultPriority();
$priority = (string)round(TPropertyValue::ensureFloat($priority), $this->_p);
- if(!isset($this->_d[$priority]) || !is_array($this->_d[$priority])) return false;
+ if(!isset($this->_d[$priority]) || !is_array($this->_d[$priority]))
+ return false;
return count($this->_d[$priority]);
}
-
+
/**
- * @return boolean whether this map is read-only or not. Defaults to false.
+ * @return numeric gets the default priority of inserted items without a specified priority
*/
public function getDefaultPriority()
{
return $this->_dp;
}
-
+
/**
- * @param boolean whether this list is read-only or not
+ * This must be called internally or when instantiated.
+ * @param numeric sets the default priority of inserted items without a specified priority
*/
protected function setDefaultPriority($value)
{
- $this->_dp=TPropertyValue::ensureFloat($value);
+ $this->_dp = (string)round(TPropertyValue::ensureFloat($value), $this->_p);
}
-
+
/**
- * @return int the precision of the floating priorities, defaults with 10
+ * @return integer The precision of numeric priorities, defaults to 8
*/
public function getPrecision()
{
return $this->_p;
}
-
+
/**
- * TPriorityList uses php function {@link round} on its priorities and thus it uses precision.
- * @param int this sets the precision of the floating point priorities.
+ * This must be called internally or when instantiated.
+ * @param integer The precision of numeric priorities.
*/
protected function setPrecision($value)
{
$this->_p=TPropertyValue::ensureInteger($value);
}
-
+
/**
* Returns an iterator for traversing the items in the list.
* This method is required by the interface IteratorAggregate.
@@ -162,21 +171,20 @@ class TPriorityList extends TList {
return new TPriorityListIterator($this->flattenPriorities());
}
-
+
/**
- * This is ordered lowest to highest.
- * @return array the array of priorities
+ * This returns a list of the priorities within this list, ordered lowest to highest.
+ * @return array the array of priority numerics in decreasing priority order
*/
public function getPriorities()
{
- $this->flattenPriorities();
+ $this->sortPriorities();
return array_keys($this->_d);
}
-
+
/**
- * this orders the priority list and flattens it into an array [0,...,n-1]
- * @return array of the values in the list in priority order
+ * This orders the priority list internally.
*/
protected function sortPriorities() {
if(!$this->_o) {
@@ -184,11 +192,10 @@ class TPriorityList extends TList $this->_o = true;
}
}
-
/**
- * this orders the priority list and flattens it into an array [0,...,n-1]
- * @return array of the values in the list in priority order
+ * This flattens the priority list into a flat array [0,...,n-1]
+ * @return array array of items in the list in priority and index order
*/
protected function flattenPriorities() {
if(is_array($this->_fd))
@@ -200,16 +207,18 @@ class TPriorityList extends TList $this->_fd = array_merge($this->_fd, $itemsatpriority);
return $this->_fd;
}
+
/**
- * Returns the item with the specified key.
- * This method is exactly the same as {@link offsetGet}.
- * @param mixed the key
- * @return mixed the element at the offset, null if no element is found at the offset
+ * Returns the item at the index of a flattened priority list.
+ * {@link offsetGet} calls this method.
+ * @param integer the index of the item to get
+ * @return mixed the element at the offset
+ * @error TInvalidDataValueException Issued when the index is invalid
*/
public function itemAt($index)
{
- if($index>=0 && $index<$this->_c) {
+ if($index>=0 && $index<$this->getCount()) {
$arr = $this->flattenPriorities();
return $arr[$index];
} else
@@ -217,27 +226,30 @@ class TPriorityList extends TList }
/**
- * @return array the key list
+ * Gets all the items at a specific priority.
+ * @param numeric priority of the items to get. Defaults to null, filled in with the default priority, if left blank.
+ * @return array all items at priority in index order, null if there are no items at that priority
*/
public function itemsAtPriority($priority=null)
{
if($priority === null)
- $priority = $this->DefaultPriority;
+ $priority = $this->getDefaultPriority();
$priority = (string)round(TPropertyValue::ensureFloat($priority), $this->_p);
- return isset($this->_d[$priority]) ? $this->_d[$priority] : false;
+ return isset($this->_d[$priority]) ? $this->_d[$priority] : null;
}
/**
- * Returns the item with the specified key.
- * This method is exactly the same as {@link offsetGet}.
- * @param mixed the key
- * @return mixed the element at the offset, null if no element is found at the offset
+ * Returns the item at an index within a priority
+ * @param integer the index into the list of items at priority
+ * @param numeric the priority which to index. no parameter or null will result in the default priority
+ * @return mixed the element at the offset, false if no element is found at the offset
*/
- public function itemAtIndexPriority($index,$priority=null)
+ public function itemAtIndexInPriority($index,$priority=null)
{
if($priority === null)
- $priority = $this->DefaultPriority;
+ $priority = $this->getDefaultPriority();
+ $priority = (string)round(TPropertyValue::ensureFloat($priority), $this->_p);
return !isset($this->_d[$priority]) ? false : (
isset($this->_d[$priority][$index]) ? $this->_d[$priority][$index] : false
@@ -245,30 +257,32 @@ class TPriorityList extends TList }
/**
- * Adds an item into the map.
- * Note, if the specified key already exists, the old value will be overwritten.
- * @param mixed key
- * @param mixed value
+ * Appends an item into the list at the end of the specified priority. The position of the added item may
+ * not be at the end of the list.
+ * @param mixed item to add into the list at priority
+ * @param numeric priority blank or null for the default priority
* @return int the index within the flattened array
* @throws TInvalidOperationException if the map is read-only
*/
public function add($item, $priority=null)
{
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
+
return $this->insertAtIndexInPriority($item,false,$priority,true);
}
/**
- * Inserts an item at the specified position.
- * Original item at the position and the next items
- * will be moved one step towards the end.
- * @param integer the specified position.
- * @param mixed new item
+ * Inserts an item at an index. It reads the priority of the item at index within the flattened list
+ * and then inserts the item at that priority-index.
+ * @param integer the specified position in the flattened list.
+ * @param mixed new item to add
* @throws TInvalidDataValueException If the index specified exceeds the bound
* @throws TInvalidOperationException if the list is read-only
*/
public function insertAt($index, $item)
{
- if($this->ReadOnly)
+ if($this->getReadOnly())
throw new TInvalidOperationException('list_readonly',get_class($this));
if(($priority=$this->priorityAt($index,true))!==false)
@@ -278,93 +292,91 @@ class TPriorityList extends TList }
/**
- * Inserts an item at the specified position.
- * Original item at the position and the next items
- * will be moved one step towards the end.
- * @param integer the specified position.
- * @param mixed new item
+ * Inserts an item at the specified index within a priority. Override and call this method to
+ * insert your own functionality.
+ * @param mixed item to add within the list.
+ * @param integer index within the priority to add the item, defaults to false which appends the item at the priority
+ * @param numeric priority priority of the item. defaults to null, which sets it to the default priority
+ * @param boolean preserveCache specifies if this is a special quick function or not. This defaults to false.
* @throws TInvalidDataValueException If the index specified exceeds the bound
* @throws TInvalidOperationException if the list is read-only
*/
- public function insertAtIndexInPriority($item,$index=false,$priority=null,$indexItem=false)
+ public function insertAtIndexInPriority($item,$index=false,$priority=null,$preserveCache=false)
{
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
- if(!$this->ReadOnly)
- {
- if($priority===null)
- $priority=$this->DefaultPriority;
-
- $priority=(string)round(TPropertyValue::ensureFloat($priority), $this->_p);
+ if($priority===null)
+ $priority=$this->getDefaultPriority();
+ $priority=(string)round(TPropertyValue::ensureFloat($priority), $this->_p);
+
+ if($preserveCache) {
+ $this->sortPriorities();
+ $cc=0;
+ foreach($this->_d as $prioritykey => $items)
+ if($prioritykey >= $priority)
+ break;
+ else
+ $cc+=count($items);
- if($indexItem) {
- $this->sortPriorities();
- $cc=0;
- foreach($this->_d as $prioritykey => $items)
- if($prioritykey >= $priority)
- break;
- else
- $cc+=count($items);
-
- if($index === false) {
- //This string conversion allows floats as keys
- $c = count($this->_d[$priority]);
- if(!$c && $this->_c)
- $this->_o = false;
- $c += $cc;
- $this->_d[$priority][]=$item;
- } else if(isset($this->_d[$priority])) {
- $c = $index + $cc;
- array_splice($this->_d[$priority],$index,0,array($item));
- } else {
- $c = $cc;
+ if($index === false) {
+ $c = count($this->_d[$priority]);
+ if(!$c && $this->_c) // no items at this priority, but there exist items in this list
$this->_o = false;
- $this->_d[$priority]=array($item);
- }
-
- if($this->_fd && is_array($this->_fd))
- array_splice($this->_fd,$c,0,array($item));
+ $c += $cc;
+ $this->_d[$priority][]=$item;
+ } else if(isset($this->_d[$priority])) {
+ $c = $index + $cc;
+ array_splice($this->_d[$priority],$index,0,array($item));
} else {
- $c = null;
- if($index === false) {
- $cc = count($this->_d[$priority]);
- if(!$cc && $this->_c)
- $this->_o = false;
- $this->_d[$priority][]=$item;
- } else if(isset($this->_d[$priority])) {
- $cc = $index;
- array_splice($this->_d[$priority],$index,0,array($item));
- } else {
- $cc = 0;
- $this->_o = false;
- $this->_d[$priority]=array($item);
- }
- if($this->_fd && is_array($this->_fd) && count($this->_d) == 1)
- array_splice($this->_fd,$cc,0,array($item));
- else
- $this->_fd = null;
+ $c = $cc;
+ $this->_o = false;
+ $this->_d[$priority]=array($item);
}
- $this->_c++;
-
- return $c;
+ if($this->_fd && is_array($this->_fd)) // if there is a flattened array cache
+ array_splice($this->_fd,$c,0,array($item));
+ } else {
+ $c = null;
+ if($index === false) {
+ $cc = count($this->_d[$priority]);
+ if(!$cc && $this->_c)
+ $this->_o = false;
+ $this->_d[$priority][]=$item;
+ } else if(isset($this->_d[$priority])) {
+ $cc = $index;
+ array_splice($this->_d[$priority],$index,0,array($item));
+ } else {
+ $cc = 0;
+ $this->_o = false;
+ $this->_d[$priority]=array($item);
+ }
+ if($this->_fd && is_array($this->_fd) && count($this->_d) == 1)
+ array_splice($this->_fd,$cc,0,array($item));
+ else
+ $this->_fd = null;
}
- else
- throw new TInvalidOperationException('list_readonly',get_class($this));
+
+ $this->_c++;
+
+ return $c;
}
/**
- * Removes an item from the list.
- * The list will first search for the item.
- * The first item found will be removed from the list.
- * @param mixed the item to be removed.
- * @return integer the index at which the item is being removed
+ * Removes an item from the priority list.
+ * The list will search for the item. The first matching item found will be removed from the list.
+ * @param mixed item the item to be removed.
+ * @return integer index within the flattened list at which the item is being removed
* @throws TInvalidDataValueException If the item does not exist
*/
public function remove($item)
{
- if(($priority=$this->priorityOf($item, true)) !== false)
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
+
+ if(($priority=$this->priorityOf($item, true))!==false)
{
$this->removeAtIndexInPriority($priority[1], $priority[0]);
return $priority[2];
@@ -374,80 +386,88 @@ class TPriorityList extends TList }
/**
- * Removes an item at the specified position.
- * @param integer the index of the item to be removed.
+ * Removes an item at the specified index in the flattened list.
+ * @param integer index of the item to be removed.
* @return mixed the removed item.
* @throws TInvalidDataValueException If the index specified exceeds the bound
* @throws TInvalidOperationException if the list is read-only
*/
public function removeAt($index)
{
- if($this->ReadOnly)
+ if($this->getReadOnly())
throw new TInvalidOperationException('list_readonly',get_class($this));
- if(($priority = $this->priorityAt($index, true)) !== false)
+ if(($priority = $this->priorityAt($index, true))!==false)
return $this->removeAtIndexInPriority($priority[1], $priority[0]);
throw new TInvalidDataValueException('list_index_invalid',$index);
}
/**
- * Removes an item from the list.
- * The list will first search for the item.
- * The first item found will be removed from the list.
- * @param mixed the item to be removed.
- * @return integer the index at which the item is being removed
+ * Removes an item from a specific priority. The list will first search for the item
+ * at the priority. The first item found will be removed from the priority.
+ * @param mixed item to be removed.
+ * @param numeric priority
+ * @return integer the index within the priority at which the item is being removed
* @throws TInvalidDataValueException If the item does not exist
*/
- public function removeAtPriority($item, $priority=null)
+ public function removeFromPriority($item, $priority=null)
{
- if($priority === null)
- $priority = $this->DefaultPriority;
- if(isset($this->_d[$priority]) && ($index=array_search($item,$this->_d[$priority],true))!==false)
- return $this->removeAtIndexInPriority($index, $priority);
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
+
+ if($priority===null)
+ $priority = $this->getDefaultPriority();
+ $priority = (string)round(TPropertyValue::ensureFloat($priority), $this->_p);
+
+ if(isset($this->_d[$priority]) && ($index=array_search($item,$this->_d[$priority],true))!==false) {
+ $this->removeAtIndexInPriority($index, $priority);
+ return $index;
+ }
throw new TInvalidDataValueException('list_item_inexistent');
}
/**
- * Removes an item from the list.
- * The list will first search for the item.
- * The first item found will be removed from the list.
- * @param mixed the item to be removed.
- * @return integer the index at which the item is being removed
+ * Removes the item at a specific index within a priority. Override
+ * and call this method to insert your own functionality.
+ * @param integer index of item to remove within the priority.
+ * @param numeric priority of the item to remove, defaults to null, or left blank, it is then set to the default priority
+ * @return mixed the removed item.
* @throws TInvalidDataValueException If the item does not exist
*/
public function removeAtIndexInPriority($index, $priority=null)
{
- if(!$this->ReadOnly)
- {
- if($priority === null)
- $priority = $this->DefaultPriority;
-
- $priority = (string)round(TPropertyValue::ensureFloat($priority), $this->_p);
- if(!isset($this->_d[$priority]) || !isset($this->_d[$priority][$index]))
- throw new TInvalidDataValueException('list_item_inexistent');
-
- // $value is an array of elements removed, only one
- $value = array_splice($this->_d[$priority],$index,1);
- $value = $value[0];
-
- if(!count($this->_d[$priority]))
- unset($this->_d[$priority]);
-
- $this->_c--;
- $this->_fd = null;
- return $value;
- }
- else
+ if($this->getReadOnly())
throw new TInvalidOperationException('list_readonly',get_class($this));
+
+ if($priority === null)
+ $priority = $this->getDefaultPriority();
+ $priority = (string)round(TPropertyValue::ensureFloat($priority), $this->_p);
+
+ if(!isset($this->_d[$priority]) || $index < 0 || $index >= count($this->_d[$priority]))
+ throw new TInvalidDataValueException('list_item_inexistent');
+
+ // $value is an array of elements removed, only one
+ $value = array_splice($this->_d[$priority],$index,1);
+ $value = $value[0];
+
+ if(!count($this->_d[$priority]))
+ unset($this->_d[$priority]);
+
+ $this->_c--;
+ $this->_fd = null;
+ return $value;
}
/**
- * Removes all items in the priority list.
+ * Removes all items in the priority list by calling removeAtIndexInPriority from the last item to the first.
*/
public function clear()
{
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
+
+ $d = array_reverse($this->_d, true);
foreach($this->_d as $priority => $items) {
- $items = array_reverse($items);
for($index = count($items) - 1; $index >= 0; $index--)
$this->removeAtIndexInPriority($index, $priority);
unset($this->_d[$priority]);
@@ -455,7 +475,7 @@ class TPriorityList extends TList }
/**
- * @param mixed the item
+ * @param mixed item
* @return boolean whether the list contains the item
*/
public function contains($item)
@@ -464,8 +484,8 @@ class TPriorityList extends TList }
/**
- * @param mixed the item
- * @return integer the index of the item in the list (0 based), -1 if not found.
+ * @param mixed item
+ * @return integer the index of the item in the flattened list (0 based), -1 if not found.
*/
public function indexOf($item)
{
@@ -476,13 +496,18 @@ class TPriorityList extends TList }
/**
- * @param mixed the item
- * @return integer the index of the item in the list (0 based), false if not found.
+ * Returns the priority of a particular item
+ * @param mixed the item to look for within the list
+ * @param boolean withindex this specifies if the full positional data of the item within the list is returned.
+ * This defaults to false, if no parameter is provided, so only provides the priority number of the item by default.
+ * @return numeric|array the priority of the item in the list, false if not found.
+ * if withindex is true, an array is returned of [0 => $priority, 1 => $priorityIndex, 2 => flattenedIndex,
+ * 'priority' => $priority, 'index' => $priorityIndex, 'absindex' => flattenedIndex]
*/
public function priorityOf($item, $withindex = false)
{
// this is to ensure priority order
- $this->flattenPriorities();
+ $this->sortPriorities();
$absindex = 0;
foreach($this->_d as $priority => $items) {
@@ -499,34 +524,46 @@ class TPriorityList extends TList }
/**
- * @param mixed the item
- * @return integer the index of the item in the list (0 based), false if not found.
+ * Retutrns the priority of an item at a particular flattened index.
+ * @param integer index of the item within the list
+ * @param boolean withindex this specifies if the full positional data of the item within the list is returned.
+ * This defaults to false, if no parameter is provided, so only provides the priority number of the item by default.
+ * @return numeric|array the priority of the item in the list, false if not found.
+ * if withindex is true, an array is returned of [0 => $priority, 1 => $priorityIndex, 2 => flattenedIndex,
+ * 'priority' => $priority, 'index' => $priorityIndex, 'absindex' => flattenedIndex]
*/
public function priorityAt($index, $withindex = false)
{
- if($index < 0 || $index >= $this->Count)
+ if($index < 0 || $index >= $this->getCount())
throw new TInvalidDataValueException('list_index_invalid',$index);
// this is to ensure priority order
$absindex = $index;
- $this->flattenPriorities();
+ $this->sortPriorities();
foreach($this->_d as $priority => $items) {
if($index >= ($c = count($items)))
$index -= $c;
else
return $withindex ?
array($priority, $index, $absindex,
- 'priority' => $priority, 'index' => $inde, 'absindex' => $absindexx) : $priority;
+ 'priority' => $priority, 'index' => $index, 'absindex' => $absindex) : $priority;
}
return false;
}
/**
- * @param mixed the item to index
- * @param mixed the item
+ * This inserts an item before another item within the list. It uses the same priority as the
+ * found index item and places the new item before it.
+ * @param mixed indexitem the item to index
+ * @param mixed the item to add before indexitem
+ * @return integer where the item has been inserted in the flattened list
+ * @throws TInvalidDataValueException If the item does not exist
*/
public function insertBefore($indexitem, $item)
{
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
+
if(($priority = $this->priorityOf($indexitem, true)) === false)
throw new TInvalidDataValueException('list_item_inexistent');
@@ -536,21 +573,28 @@ class TPriorityList extends TList }
/**
- * @param mixed the item to index
- * @param mixed the item
+ * This inserts an item after another item within the list. It uses the same priority as the
+ * found index item and places the new item after it.
+ * @param mixed indexitem the item to index
+ * @param mixed the item to add after indexitem
+ * @return integer where the item has been inserted in the flattened list
+ * @throws TInvalidDataValueException If the item does not exist
*/
public function insertAfter($indexitem, $item)
{
- if(($priority = $this->priorityOf($indexitem, true)) === false)
+ if($this->getReadOnly())
+ throw new TInvalidOperationException('list_readonly',get_class($this));
+
+ if(($priority=$this->priorityOf($indexitem,true))===false)
throw new TInvalidDataValueException('list_item_inexistent');
- $this->insertAtIndexInPriority($item, $priority[1]+1, $priority[0]);
+ $this->insertAtIndexInPriority($item,$priority[1]+1,$priority[0]);
return $priority[2]+1;
}
/**
- * @return array the list of items in array
+ * @return array the priority list of items in array
*/
public function toArray()
{
@@ -558,17 +602,17 @@ class TPriorityList extends TList }
/**
- * @return array the list of items in array with array keys as priorities and items as arrays of items
+ * @return array the array of priorities keys with values of arrays of items. The priorities are sorted so important priorities, lower numerics, are first.
*/
public function toPriorityArray()
{
- $this->flattenPriorities();
+ $this->sortPriorities();
return $this->_d;
}
/**
- * Copies iterable data into the map.
+ * Copies iterable data into the priority list.
* Note, existing data in the map will be cleared first.
* @param mixed the data to be copied from, must be an array or object implementing Traversable
* @throws TInvalidDataTypeException If data is neither an array nor an iterator.
@@ -578,7 +622,7 @@ class TPriorityList extends TList if($data instanceof TPriorityList) {
if($this->getCount()>0)
$this->clear();
- foreach($data->Priorities as $priority) {
+ foreach($data->getPriorities() as $priority) {
foreach($data->itemsAtPriority($priority) as $index => $item)
$this->insertAtIndexInPriority($item, $index, $priority);
}
@@ -594,17 +638,19 @@ class TPriorityList extends TList }
/**
- * Merges iterable data into the map.
- * Existing data in the map will be kept and overwritten if the keys are the same.
+ * Merges iterable data into the priority list.
+ * New data will be appended to the end of the existing data. If another TPriorityList is merged,
+ * the incoming parameter items will be appended at the priorities they are present. These items will be added
+ * to the end of the existing items with equal priorities, if there are any.
* @param mixed the data to be merged with, must be an array or object implementing Traversable
* @throws TInvalidDataTypeException If data is neither an array nor an iterator.
*/
public function mergeWith($data)
{
if($data instanceof TPriorityList) {
- foreach($data->Priorities as $priority) {
+ foreach($data->getPriorities() as $priority) {
foreach($data->itemsAtPriority($priority) as $index => $item)
- $this->insertAtIndexInPriority($item, $index, $priority);
+ $this->insertAtIndexInPriority($item, false, $priority);
}
} else if(is_array($data) || $data instanceof Traversable) {
foreach($data as $priority=>$item)
@@ -622,7 +668,7 @@ class TPriorityList extends TList */
public function offsetExists($offset)
{
- return ($offset>=0 && $offset<$this->_c);
+ return ($offset>=0 && $offset<$this->getCount());
}
/**
@@ -637,8 +683,14 @@ class TPriorityList extends TList }
/**
- * Sets the element at the specified offset.
- * This method is required by the interface ArrayAccess.
+ * Sets the element at the specified offset. This method is required by the interface ArrayAccess.
+ * Setting elements in a priority list is not straight forword when appending and setting at the
+ * end boundary. When appending without an offset (a null offset), the item will be added at
+ * the default priority. The item may not be the last item in the list. When appending with an
+ * offset equal to the count of the list, the item will get be appended with the last items priority.
+ *
+ * All together, when setting the location of an item, the item stays in that location, but appending
+ * an item into a priority list doesn't mean the item is at the end of the list.
* @param integer the offset to set element
* @param mixed the element value
*/
@@ -646,8 +698,13 @@ class TPriorityList extends TList {
if($offset === null)
return $this->add($item);
- $priority = $this->priorityAt($offset, true);
- $this->removeAtIndexInPriority($priority[1], $priority[0]);
+ if($offset === $this->getCount()) {
+ $priority = $this->priorityAt($offset-1, true);
+ $priority[1]++;
+ } else {
+ $priority = $this->priorityAt($offset, true);
+ $this->removeAtIndexInPriority($priority[1], $priority[0]);
+ }
$this->insertAtIndexInPriority($item, $priority[1], $priority[0]);
}
@@ -668,12 +725,12 @@ class TPriorityList extends TList * TPriorityListIterator implements Iterator interface.
*
* TPriorityListIterator is used by TPriorityList. It allows TPriorityList to return a new iterator
- * for traversing the items in the map.
+ * for traversing the items in the priority list.
*
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TPriorityList.php 2541 2008-10-21 15:05:13Z qiang.xue $
+ * @author Brad Anderson <javalizard@gmail.com>
+ * @version $Id: TPriorityList.php 2541 2010-10-03 15:05:13Z javalizard $
* @package System.Collections
- * @since 3.0
+ * @since 3.2a
*/
class TPriorityListIterator implements Iterator
{
|