1) ? func_get_args() : $items;
// We now have support for using the key of a data object set
foreach($itemsArr as $i => $item) {
if(is_subclass_of($item, 'ViewableData')) {
$this->items[$i] = $item;
} elseif(is_object($item) || ArrayLib::is_associative($item)) {
$this->items[$i] = new ArrayData($item);
} else {
user_error(
"DataObjectSet::__construct: Passed item #{$i} is not an object or associative array,
can't be properly iterated on in templates",
E_USER_WARNING
);
$this->items[$i] = $item;
}
}
}
parent::__construct();
}
/**
* Necessary for interface ArrayAccess. Returns whether an item with $key exists
* @param mixed $key
* @return bool
*/
public function offsetExists($key) {
return isset($this->items[$key]);
}
/**
* Necessary for interface ArrayAccess. Returns item stored in array with index $key
* @param mixed $key
* @return DataObject
*/
public function offsetGet($key) {
return $this->items[$key];
}
/**
* Necessary for interface ArrayAccess. Set an item with the key in $key
* @param mixed $key
* @param mixed $value
*/
public function offsetSet($key, $value) {
$this->items[$key] = $value;
}
/**
* Necessary for interface ArrayAccess. Unset an item with the key in $key
* @param mixed $key
*/
public function offsetUnset($key) {
unset($this->items[$key]);
}
/**
* Destory all of the DataObjects in this set.
*/
public function destroy() {
foreach($this->items as $item) {
$item->destroy();
}
}
/**
* Removes all the items in this set.
*/
public function emptyItems() {
$this->items = array();
}
/**
* Convert this DataObjectSet to an array of DataObjects.
* @param string $index Index the array by this field.
* @return array
*/
public function toArray($index = null) {
if(!$index) {
return $this->items;
}
$map = array();
foreach($this->items as $item) {
$map[$item->$index] = $item;
}
return $map;
}
/**
* Convert this DataObjectSet to an array of maps.
* @param string $index Index the array by this field.
* @return array
*/
public function toNestedArray($index = null){
if(!$index) {
$index = "ID";
}
$map = array();
foreach( $this->items as $item ) {
$map[$item->$index] = $item->getAllFields();
}
return $map;
}
/**
* Returns an array of ID => Title for the items in this set.
*
* This is an alias of {@link DataObjectSet->map()}
*
* @deprecated 2.5 Please use map() instead
*
* @param string $index The field to use as a key for the array
* @param string $titleField The field (or method) to get values for the map
* @param string $emptyString Empty option text e.g "(Select one)"
* @param bool $sort Sort the map alphabetically based on the $titleField value
* @return array
*/
public function toDropDownMap($index = 'ID', $titleField = 'Title', $emptyString = null, $sort = false) {
return $this->map($index, $titleField, $emptyString, $sort);
}
/**
* Set number of objects on each page.
* @param int $length Number of objects per page
*/
public function setPageLength($length) {
$this->pageLength = $length;
}
/**
* Set the page limits.
* @param int $pageStart The start of this page.
* @param int $pageLength Number of objects per page
* @param int $totalSize Total number of objects.
*/
public function setPageLimits($pageStart, $pageLength, $totalSize) {
$this->pageStart = $pageStart;
$this->pageLength = $pageLength;
$this->totalSize = $totalSize;
}
/**
* Get the page limits
* @return array
*/
public function getPageLimits() {
return array(
'pageStart' => $this->pageStart,
'pageLength' => $this->pageLength,
'totalSize' => $this->totalSize,
);
}
/**
* Use the limit from the given query to add prev/next buttons to this DataObjectSet.
* @param SQLQuery $query The query used to generate this DataObjectSet
*/
public function parseQueryLimit(SQLQuery $query) {
if($query->limit) {
if(is_array($query->limit)) {
$length = $query->limit['limit'];
$start = $query->limit['start'];
} else if(stripos($query->limit, 'OFFSET')) {
list($length, $start) = preg_split("/ +OFFSET +/i", trim($query->limit));
} else {
$result = preg_split("/ *, */", trim($query->limit));
$start = $result[0];
$length = isset($result[1]) ? $result[1] : null;
}
if(!$length) {
$length = $start;
$start = 0;
}
$this->setPageLimits($start, $length, $query->unlimitedRowCount());
}
}
/**
* Returns the number of the current page.
* @return int
*/
public function CurrentPage() {
return floor($this->pageStart / $this->pageLength) + 1;
}
/**
* Returns the total number of pages.
* @return int
*/
public function TotalPages() {
if($this->totalSize == 0) {
$this->totalSize = $this->Count();
}
if($this->pageLength == 0) {
$this->pageLength = 10;
}
return ceil($this->totalSize / $this->pageLength);
}
/**
* Return a datafeed of page-links, good for use in search results, etc.
* $maxPages will put an upper limit on the number of pages to return. It will
* show the pages surrounding the current page, so you can still get to the deeper pages.
* @param int $maxPages The maximum number of pages to return
* @return DataObjectSet
*/
public function Pages($maxPages = 0){
$ret = new DataObjectSet();
if($maxPages) {
$startPage = ($this->CurrentPage() - floor($maxPages / 2)) - 1;
$endPage = $this->CurrentPage() + floor($maxPages / 2);
if($startPage < 0) {
$startPage = 0;
$endPage = $maxPages;
}
if($endPage > $this->TotalPages()) {
$endPage = $this->TotalPages();
$startPage = max(0, $endPage - $maxPages);
}
} else {
$startPage = 0;
$endPage = $this->TotalPages();
}
for($i=$startPage; $i < $endPage; $i++){
$link = HTTP::setGetVar($this->paginationGetVar, $i*$this->pageLength);
$thePage = new ArrayData(array(
"PageNum" => $i+1,
"Link" => $link,
"CurrentBool" => ($this->CurrentPage() == $i+1)?true:false,
)
);
$ret->push($thePage);
}
return $ret;
}
/*
* Display a summarized pagination which limits the number of pages shown
* "around" the currently active page for visual balance.
* In case more paginated pages have to be displayed, only
*
* Example: 25 pages total, currently on page 6, context of 4 pages
* [prev] [1] ... [4] [5] [[6]] [7] [8] ... [25] [next]
*
* Example template usage:
*
* <% if MyPages.MoreThanOnePage %>
* <% if MyPages.NotFirstPage %>
* Prev
* <% end_if %>
* <% control MyPages.PaginationSummary(4) %>
* <% if CurrentBool %>
* $PageNum
* <% else %>
* <% if Link %>
* $PageNum
* <% else %>
* ...
* <% end_if %>
* <% end_if %>
* <% end_control %>
* <% if MyPages.NotLastPage %>
* Next
* <% end_if %>
* <% end_if %>
*
*
* @param integer $context Number of pages to display "around" the current page. Number should be even,
* because its halved to either side of the current page.
* @return DataObjectSet
*/
public function PaginationSummary($context = 4) {
$ret = new DataObjectSet();
// convert number of pages to even number for offset calculation
if($context % 2) $context--;
// find out the offset
$current = $this->CurrentPage();
$totalPages = $this->TotalPages();
// if the first or last page is shown, use all content on one side (either left or right of current page)
// otherwise half the number for usage "around" the current page
$offset = ($current == 1 || $current == $totalPages) ? $context : floor($context/2);
$leftOffset = $current - ($offset);
if($leftOffset < 1) $leftOffset = 1;
if($leftOffset + $context > $totalPages) $leftOffset = $totalPages - $context;
for($i=0; $i < $totalPages; $i++) {
$link = HTTP::setGetVar($this->paginationGetVar, $i*$this->pageLength);
$num = $i+1;
$currentBool = ($current == $i+1) ? true:false;
if(
($num == $leftOffset-1 && $num != 1 && $num != $totalPages)
|| ($num == $leftOffset+$context+1 && $num != 1 && $num != $totalPages)
) {
$ret->push(new ArrayData(array(
"PageNum" => null,
"Link" => null,
"CurrentBool" => $currentBool,
)
));
} else if($num == 1 || $num == $totalPages || in_array($num, range($current-$offset,$current+$offset))) {
$ret->push(new ArrayData(array(
"PageNum" => $num,
"Link" => $link,
"CurrentBool" => $currentBool,
)
));
}
}
return $ret;
}
/**
* Returns true if the current page is not the first page.
* @return boolean
*/
public function NotFirstPage(){
return $this->CurrentPage() != 1;
}
/**
* Returns true if the current page is not the last page.
* @return boolean
*/
public function NotLastPage(){
return $this->CurrentPage() != $this->TotalPages();
}
/**
* Returns true if there is more than one page.
* @return boolean
*/
public function MoreThanOnePage(){
return $this->TotalPages() > 1;
}
function FirstItem() {
return isset($this->pageStart) ? $this->pageStart + 1 : 1;
}
function LastItem() {
if(isset($this->pageStart)) {
return min($this->pageStart + $this->pageLength, $this->totalSize);
} else {
return min($this->pageLength, $this->totalSize);
}
}
/**
* Returns the URL of the previous page.
* @return string
*/
public function PrevLink() {
if($this->pageStart - $this->pageLength >= 0) {
return HTTP::setGetVar($this->paginationGetVar, $this->pageStart - $this->pageLength);
}
}
/**
* Returns the URL of the next page.
* @return string
*/
public function NextLink() {
if($this->pageStart + $this->pageLength < $this->totalSize) {
return HTTP::setGetVar($this->paginationGetVar, $this->pageStart + $this->pageLength);
}
}
/**
* Allows us to use multiple pagination GET variables on the same page (eg. if you have search results and page comments on a single page)
*
* Example: @see PageCommentInterface::Comments()
* @param string $var The variable to go in the GET string (Defaults to 'start')
*/
public function setPaginationGetVar($var) {
$this->paginationGetVar = $var;
}
/**
* Add an item to the DataObject Set.
* @param DataObject $item Item to add.
* @param string $key Key to index this DataObject by.
*/
public function push($item, $key = null) {
if($key != null) {
unset($this->items[$key]);
$this->items[$key] = $item;
} else {
$this->items[] = $item;
}
}
/**
* Add an item to the beginning of the DataObjectSet
* @param DataObject $item Item to add
* @param string $key Key to index this DataObject by.
*/
public function insertFirst($item, $key = null) {
if($key == null) {
array_unshift($this->items, $item);
} else {
$this->items = array_merge(array($key=>$item), $this->items);
}
}
/**
* Insert a DataObject at the beginning of this set.
* @param DataObject $item Item to insert.
*/
public function shift($item) {
array_unshift($this->items, $item);
}
/**
* Remove a DataObject from this set.
* @param DataObject $itemObject Item to remove.
*/
public function remove($itemObject) {
foreach($this->items as $key=>$item){
if($item === $itemObject){
unset($this->items[$key]);
}
}
}
/**
* Replaces $itemOld with $itemNew
*
* @param DataObject $itemOld
* @param DataObject $itemNew
*/
public function replace($itemOld, $itemNew) {
foreach($this->items as $key => $item) {
if($item === $itemOld) {
$this->items[$key] = $itemNew;
return;
}
}
}
/**
* Merge another set onto the end of this set.
* @param DataObjectSet $anotherSet Set to mege onto this set.
*/
public function merge($anotherSet){
if($anotherSet) {
foreach($anotherSet as $item){
$this->push($item);
}
}
}
/**
* Gets a specific slice of an existing set.
*
* @param int $offset
* @param int $length
* @return DataObjectSet
*/
public function getRange($offset, $length) {
$set = array_slice($this->items, (int)$offset, (int)$length);
return new DataObjectSet($set);
}
/**
* Returns an Iterator for this DataObjectSet.
* This function allows you to use DataObjectSets in foreach loops
* @return DataObjectSet_Iterator
*/
public function getIterator() {
return new DataObjectSet_Iterator($this->items);
}
/**
* Returns false if the set is empty.
* @return boolean
*/
public function exists() {
return (bool)$this->items;
}
/**
* Return the first item in the set.
* @return DataObject
*/
public function First() {
if(count($this->items) < 1)
return null;
$keys = array_keys($this->items);
return $this->items[$keys[0]];
}
/**
* Return the last item in the set.
* @return DataObject
*/
public function Last() {
if(count($this->items) < 1)
return null;
$keys = array_keys($this->items);
return $this->items[$keys[sizeof($keys)-1]];
}
/**
* Return the total number of items in this dataset.
* @return int
*/
public function TotalItems() {
return $this->totalSize ? $this->totalSize : sizeof($this->items);
}
/**
* Returns the actual number of items in this dataset.
* @return int
*/
public function Count() {
return sizeof($this->items);
}
/**
* Returns this set as a XHTML unordered list.
* @return string
*/
public function UL() {
if($this->items) {
$result = "\n";
return $result;
}
}
/**
* Returns this set as a XHTML unordered list.
* @return string
*/
public function forTemplate() {
return $this->UL();
}
/**
* Returns an array of ID => Title for the items in this set.
*
* @param string $index The field to use as a key for the array
* @param string $titleField The field (or method) to get values for the map
* @param string $emptyString Empty option text e.g "(Select one)"
* @param bool $sort Sort the map alphabetically based on the $titleField value
* @return array
*/
public function map($index = 'ID', $titleField = 'Title', $emptyString = null, $sort = false) {
$map = array();
if($this->items) {
foreach($this->items as $item) {
$map[$item->$index] = ($item->hasMethod($titleField)) ? $item->$titleField() : $item->$titleField;
}
}
if($emptyString) $map = array('' => "$emptyString") + $map;
if($sort) asort($map);
return $map;
}
/**
* Find an item in this list where the field $key is equal to $value
* Eg: $doSet->find('ID', 4);
* @return ViewableData The first matching item.
*/
public function find($key, $value) {
foreach($this->items as $item) {
if($item->$key == $value) return $item;
}
}
/**
* Return a column of the given field
* @param string $value The field name
* @return array
*/
public function column($value = "ID") {
$list = array();
foreach($this->items as $item ){
$list[] = ($item->hasMethod($value)) ? $item->$value() : $item->$value;
}
return $list;
}
/**
* Returns an array of DataObjectSets. The array is keyed by index.
*
* @param string $index The field name to index the array by.
* @return array
*/
public function groupBy($index) {
$result = array();
foreach($this->items as $item) {
$key = ($item->hasMethod($index)) ? $item->$index() : $item->$index;
if(!isset($result[$key])) {
$result[$key] = new DataObjectSet();
}
$result[$key]->push($item);
}
return $result;
}
/**
* Groups the items by a given field.
* Returns a DataObjectSet suitable for use in a nested template.
* @param string $index The field to group by
* @param string $childControl The name of the nested page control
* @return DataObjectSet
*/
public function GroupedBy($index, $childControl = "Children") {
$grouped = $this->groupBy($index);
$groupedAsSet = new DataObjectSet();
foreach($grouped as $group) {
$groupedAsSet->push($group->First()->customise(array(
$childControl => $group
)));
}
return $groupedAsSet;
}
/**
* Returns a nested unordered list out of a "chain" of DataObject-relations,
* using the automagic ComponentSet-relation-methods to find subsequent DataObjectSets.
* The formatting of the list can be different for each level, and is evaluated as an SS-template
* with access to the current DataObjects attributes and methods.
*
* Example: Groups (Level 0, the "calling" DataObjectSet, needs to be queried externally)
* and their Members (Level 1, determined by the Group->Members()-relation).
*
* @param array $nestingLevels
* Defines relation-methods on DataObjects as a string, plus custom
* SS-template-code for the list-output. Use "Root" for the current DataObjectSet (is will not evaluate into
* a function).
* Caution: Don't close the list-elements (determined programatically).
* You need to escape dollar-signs that need to be evaluated as SS-template-code.
* Use $EvenOdd to get appropriate classes for CSS-styling.
* Format:
* array(
* array(
* "dataclass" => "Root",
* "template" => "\$AccountName"
* ),
* array(
* "dataclass" => "GrantObjects",
* "template" => "#\$GrantNumber: \$TotalAmount.Nice, \$ApplicationDate.ShortMonth \$ApplicationDate.Year"
* )
* );
* @param string $ulExtraAttributes Extra attributes
*
* @return string Unordered List (HTML)
*/
public function buildNestedUL($nestingLevels, $ulExtraAttributes = "") {
return $this->getChildrenAsUL($nestingLevels, 0, "", $ulExtraAttributes);
}
/**
* Gets called recursively on the child-objects of the chain.
*
* @param array $nestingLevels see {@buildNestedUL}
* @param int $level Current nesting level
* @param string $template Template for list item
* @param string $ulExtraAttributes Extra attributes
* @return string
*/
public function getChildrenAsUL($nestingLevels, $level = 0, $template = "\$Title", $ulExtraAttributes = null, &$itemCount = 0) {
$output = "";
$hasNextLevel = false;
$ulExtraAttributes = " $ulExtraAttributes";
$output = "\n";
$currentNestingLevel = $nestingLevels[$level];
// either current or default template
$currentTemplate = (!empty($currentNestingLevel)) ? $currentNestingLevel['template'] : $template;
$myViewer = SSViewer::fromString($currentTemplate);
if(isset($nestingLevels[$level+1]['dataclass'])){
$childrenMethod = $nestingLevels[$level+1]['dataclass'];
}
// sql-parts
$filter = (isset($nestingLevels[$level+1]['filter'])) ? $nestingLevels[$level+1]['filter'] : null;
$sort = (isset($nestingLevels[$level+1]['sort'])) ? $nestingLevels[$level+1]['sort'] : null;
$join = (isset($nestingLevels[$level+1]['join'])) ? $nestingLevels[$level+1]['join'] : null;
$limit = (isset($nestingLevels[$level+1]['limit'])) ? $nestingLevels[$level+1]['limit'] : null;
$having = (isset($nestingLevels[$level+1]['having'])) ? $nestingLevels[$level+1]['having'] : null;
foreach($this as $parent) {
$evenOdd = ($itemCount % 2 == 0) ? "even" : "odd";
$parent->setField('EvenOdd', $evenOdd);
$template = $myViewer->process($parent);
// if no output is selected, fall back to the id to keep the item "clickable"
$output .= $template . "\n";
if(isset($childrenMethod)) {
// workaround for missing groupby/having-parameters in instance_get
// get the dataobjects for the next level
$children = $parent->$childrenMethod($filter, $sort, $join, $limit, $having);
if($children) {
$output .= $children->getChildrenAsUL($nestingLevels, $level+1, $currentTemplate, $ulExtraAttributes);
}
}
$output .= "\n";
$itemCount++;
}
$output .= "\n";
return $output;
}
/**
* Sorts the current DataObjectSet instance.
* @param string $fieldname The name of the field on the DataObject that you wish to sort the set by.
* @param string $direction Direction to sort by, either "ASC" or "DESC".
*/
public function sort($fieldname, $direction = "ASC") {
if($this->items) {
if (preg_match('/(.+?)(\s+?)(A|DE)SC$/', $fieldname, $matches)) {
$fieldname = $matches[1];
$direction = $matches[3].'SC';
}
column_sort($this->items, $fieldname, $direction, false);
}
}
/**
* Remove duplicates from this set based on the dataobjects field.
* Assumes all items contained in the set all have that field.
* @param string $field the field to check for duplicates
*/
public function removeDuplicates($field = 'ID') {
$exists = array();
foreach($this->items as $key => $item) {
if(isset($exists[$fullkey = ClassInfo::baseDataClass($item) . ":" . $item->$field])) {
unset($this->items[$key]);
}
$exists[$fullkey] = true;
}
}
/**
* Returns information about this set in HTML format for debugging.
* @return string
*/
public function debug() {
$val = "" . $this->class . "
";
foreach($this as $item) {
$val .= "- " . Debug::text($item) . "
";
}
$val .= "
";
return $val;
}
/**
* Groups the set by $groupField and returns the parent of each group whose class
* is $groupClassName. If $collapse is true, the group will be collapsed up until an ancestor with the
* given class is found.
* @param string $groupField The field to group by.
* @param string $groupClassName Classname.
* @param string $sortParents SORT clause to insert into the parents SQL.
* @param string $parentField Parent field.
* @param boolean $collapse Collapse up until an ancestor with the given class is found.
* @param string $requiredParents Required parents
* @return DataObjectSet
*/
public function groupWithParents($groupField, $groupClassName, $sortParents = null, $parentField = 'ID', $collapse = false, $requiredParents = null) {
// Each item in this DataObjectSet is grouped into a multidimensional array
// indexed by it's parent. The parent IDs are later used to find the parents
// that make up the returned set.
$groupedSet = array();
// Array to store the subgroups matching the requirements
$resultsArray = array();
// Put this item into the array indexed by $groupField.
// the keys are later used to retrieve the top-level records
foreach( $this->items as $item ) {
$groupedSet[$item->$groupField][] = $item;
}
$parentSet = null;
// retrieve parents for this set
// TODO How will we collapse the hierarchy to bridge the gap?
// if collapse is specified, then find the most direct ancestor of type
// $groupClassName
if($collapse) {
// The most direct ancestors with the type $groupClassName
$parentSet = array();
// get direct parents
$parents = DataObject::get( 'SiteTree', "\"SiteTree\".\"$parentField\" IN( " . implode( ",", array_keys( $groupedSet ) ) . ")", $sortParents );
// for each of these parents...
foreach($parents as $parent) {
// store the old parent ID. This is required to change the grouped items
// in the $groupSet array
$oldParentID = $parent->ID;
// get the parental stack
$parentObjects= $parent->parentStack();
$parentStack = array();
foreach( $parentObjects as $parentObj )
$parentStack[] = $parentObj->ID;
// is some particular IDs are required, then get the intersection
if($requiredParents && count($requiredParents)) {
$parentStack = array_intersect($requiredParents, $parentStack);
}
$newParent = null;
// If there are no parents, the group can be omitted
if(empty($parentStack)) {
$newParent = new DataObjectSet();
} else {
$newParent = DataObject::get_one( $groupClassName, "\"SiteTree\".\"$parentField\" IN( " . implode( ",", $parentStack ) . ")" );
}
// change each of the descendant's association from the old parent to
// the new parent. This effectively collapses the hierarchy
foreach( $groupedSet[$oldParentID] as $descendant ) {
$groupedSet[$newParent->ID][] = $descendant;
}
// Add the most direct ancestor of type $groupClassName
$parentSet[] = $newParent;
}
// otherwise get the parents of these items
} else {
$requiredIDs = array_keys( $groupedSet );
if( $requiredParents && cont($requiredParents)) {
$requiredIDs = array_intersect($requiredParents, $requiredIDs);
}
if(empty($requiredIDs)) {
$parentSet = new DataObjectSet();
} else {
$parentSet = DataObject::get( $groupClassName, "\"$groupClassName\".\"$parentField\" IN( " . implode( ",", $requiredIDs ) . ")", $sortParents );
}
$parentSet = $parentSet->toArray();
}
foreach($parentSet as $parent) {
$resultsArray[] = $parent->customise(array(
"GroupItems" => new DataObjectSet($groupedSet[$parent->$parentField])
));
}
return new DataObjectSet($resultsArray);
}
/**
* Add a field to this set without writing it to the database
* @param DataObject $field Field to add
*/
function addWithoutWrite($field) {
$this->items[] = $field;
}
/**
* Returns true if the DataObjectSet contains all of the IDs givem
* @param $idList An array of object IDs
*/
function containsIDs($idList) {
foreach($idList as $item) $wants[$item] = true;
foreach($this->items as $item) if($item) unset($wants[$item->ID]);
return !$wants;
}
/**
* Returns true if the DataObjectSet contains all of and *only* the IDs given.
* Note that it won't like duplicates very much.
* @param $idList An array of object IDs
*/
function onlyContainsIDs($idList) {
return $this->containsIDs($idList) && sizeof($idList) == sizeof($this->items);
}
}
/**
* Sort a 2D array by particular column.
* @param array $data The array to sort.
* @param string $column The name of the column you wish to sort by.
* @param string $direction Direction to sort by, either "ASC" or "DESC".
* @param boolean $preserveIndexes Preserve indexes
*/
function column_sort(&$data, $column, $direction = "ASC", $preserveIndexes = true) {
global $column_sort_field, $column_sort_multiplier;
// We have to keep numeric diretions for legacy
if(is_numeric($direction)) {
$column_sort_multiplier = $direction;
} elseif($direction == "ASC") {
$column_sort_multiplier = 1;
} elseif($direction == "DESC") {
$column_sort_multiplier = -1;
} else {
$column_sort_multiplier = 0;
}
$column_sort_field = $column;
if($preserveIndexes) {
uasort($data, "column_sort_callback_basic");
} else {
usort($data, "column_sort_callback_basic");
}
}
/**
* Callback used by column_sort
*/
function column_sort_callback_basic($a, $b) {
global $column_sort_field, $column_sort_multiplier;
if($a->$column_sort_field == $b->$column_sort_field) {
$result = 0;
} else {
$result = ($a->$column_sort_field < $b->$column_sort_field) ? -1 * $column_sort_multiplier : 1 * $column_sort_multiplier;
}
return $result;
}
/**
* An Iterator for a DataObjectSet
*/
class DataObjectSet_Iterator implements Iterator {
function __construct($items) {
$this->items = $items;
$this->current = $this->prepareItem(current($this->items));
}
/**
* Prepare an item taken from the internal array for
* output by this iterator. Ensures that it is an object.
* @param DataObject $item Item to prepare
* @return DataObject
*/
protected function prepareItem($item) {
if(is_object($item)) {
$item->iteratorProperties(key($this->items), sizeof($this->items));
}
// This gives some reliablity but it patches over the root cause of the bug...
// else if(key($this->items) !== null) $item = new ViewableData();
return $item;
}
/**
* Return the current object of the iterator.
* @return DataObject
*/
public function current() {
return $this->current;
}
/**
* Return the key of the current object of the iterator.
* @return mixed
*/
public function key() {
return key($this->items);
}
/**
* Return the next item in this set.
* @return DataObject
*/
public function next() {
$this->current = $this->prepareItem(next($this->items));
return $this->current;
}
/**
* Rewind the iterator to the beginning of the set.
* @return DataObject The first item in the set.
*/
public function rewind() {
$this->current = $this->prepareItem(reset($this->items));
return $this->current;
}
/**
* Check the iterator is pointing to a valid item in the set.
* @return boolean
*/
public function valid() {
return $this->current !== false;
}
/**
* Return the next item in this set without progressing the iterator.
* @return DataObject
*/
public function peekNext() {
return $this->getOffset(1);
}
/**
* Return the prvious item in this set, without affecting the iterator.
* @return DataObject
*/
public function peekPrev() {
return $this->getOffset(-1);
}
/**
* Return the object in this set offset by $offset from the iterator pointer.
* @param int $offset The offset.
* @return DataObject|boolean DataObject of offset item, or boolean FALSE if not found
*/
public function getOffset($offset) {
$keys = array_keys($this->items);
foreach($keys as $i => $key) {
if($key == key($this->items)) break;
}
if(isset($keys[$i + $offset])) {
$requiredKey = $keys[$i + $offset];
return $this->items[$requiredKey];
}
return false;
}
}
?>