diff options
author | ctrlaltca <> | 2012-07-12 11:21:01 +0000 |
---|---|---|
committer | ctrlaltca <> | 2012-07-12 11:21:01 +0000 |
commit | 903ae8a581fac1e6917fc3e31d2ad8fb91df80c3 (patch) | |
tree | e08bf04f0823650a231227ac3499121270172a23 /framework/Collections/TPagedDataSource.php | |
parent | 3e4e6e66aeb3f8fea4e1eb4237498ef9d2358f63 (diff) |
standardize the use of unix eol; use svn properties to enforce native eol
Diffstat (limited to 'framework/Collections/TPagedDataSource.php')
-rw-r--r-- | framework/Collections/TPagedDataSource.php | 890 |
1 files changed, 445 insertions, 445 deletions
diff --git a/framework/Collections/TPagedDataSource.php b/framework/Collections/TPagedDataSource.php index c0fbbec1..2b5a2909 100644 --- a/framework/Collections/TPagedDataSource.php +++ b/framework/Collections/TPagedDataSource.php @@ -1,446 +1,446 @@ -<?php
-/**
- * TPagedDataSource, TPagedListIterator, TPagedMapIterator classes
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
+<?php +/** + * TPagedDataSource, TPagedListIterator, TPagedMapIterator classes + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @link http://www.pradosoft.com/ * @copyright Copyright © 2005-2012 PradoSoft - * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Collections
- */
-
-/**
- * TPagedDataSource class
- *
- * TPagedDataSource implements an integer-indexed collection class with paging functionality.
- *
- * Data items in TPagedDataSource can be traversed using <b>foreach</b>
- * PHP statement like the following,
- * <code>
- * foreach($pagedDataSource as $dataItem)
- * </code>
- * The data are fetched from {@link setDataSource DataSource}. Only the items
- * within the specified page will be returned and traversed.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Collections
- * @since 3.0
- */
-class TPagedDataSource extends TComponent implements IteratorAggregate,Countable
-{
- /**
- * @var mixed original data source
- */
- private $_dataSource=null;
- /**
- * @var integer number of items in each page
- */
- private $_pageSize=10;
- /**
- * @var integer current page index
- */
- private $_currentPageIndex=0;
- /**
- * @var boolean whether to allow paging
- */
- private $_allowPaging=false;
- /**
- * @var boolean whether to allow custom paging
- */
- private $_allowCustomPaging=false;
- /**
- * @var integer user-assigned number of items in data source
- */
- private $_virtualCount=0;
-
- /**
- * @return mixed original data source. Defaults to null.
- */
- public function getDataSource()
- {
- return $this->_dataSource;
- }
-
- /**
- * @param mixed original data source
- */
- public function setDataSource($value)
- {
- if(!($value instanceof TMap) && !($value instanceof TList))
- {
- if(is_array($value))
- $value=new TMap($value);
- else if($value instanceof Traversable)
- $value=new TList($value);
- else if($value!==null)
- throw new TInvalidDataTypeException('pageddatasource_datasource_invalid');
- }
- $this->_dataSource=$value;
- }
-
- /**
- * @return integer number of items in each page. Defaults to 10.
- */
- public function getPageSize()
- {
- return $this->_pageSize;
- }
-
- /**
- * @param integer number of items in each page
- */
- public function setPageSize($value)
- {
- if(($value=TPropertyValue::ensureInteger($value))>0)
- $this->_pageSize=$value;
- else
- throw new TInvalidDataValueException('pageddatasource_pagesize_invalid');
- }
-
- /**
- * @return integer current page index. Defaults to 0.
- */
- public function getCurrentPageIndex()
- {
- return $this->_currentPageIndex;
- }
-
- /**
- * @param integer current page index
- */
- public function setCurrentPageIndex($value)
- {
- if(($value=TPropertyValue::ensureInteger($value))<0)
- $value=0;
- $this->_currentPageIndex=$value;
- }
-
- /**
- * @return boolean whether to allow paging. Defaults to false.
- */
- public function getAllowPaging()
- {
- return $this->_allowPaging;
- }
-
- /**
- * @param boolean whether to allow paging
- */
- public function setAllowPaging($value)
- {
- $this->_allowPaging=TPropertyValue::ensureBoolean($value);
- }
-
- /**
- * @return boolean whether to allow custom paging. Defaults to false.
- */
- public function getAllowCustomPaging()
- {
- return $this->_allowCustomPaging;
- }
-
- /**
- * @param boolean whether to allow custom paging
- */
- public function setAllowCustomPaging($value)
- {
- $this->_allowCustomPaging=TPropertyValue::ensureBoolean($value);
- }
-
- /**
- * @return integer user-assigned number of items in data source Defaults to 0.
- */
- public function getVirtualItemCount()
- {
- return $this->_virtualCount;
- }
-
- /**
- * @param integer user-assigned number of items in data source
- */
- public function setVirtualItemCount($value)
- {
- if(($value=TPropertyValue::ensureInteger($value))>=0)
- $this->_virtualCount=$value;
- else
- throw new TInvalidDataValueException('pageddatasource_virtualitemcount_invalid');
- }
-
- /**
- * @return integer number of items in current page
- */
- public function getCount()
- {
- if($this->_dataSource===null)
- return 0;
- if(!$this->_allowPaging)
- return $this->getDataSourceCount();
- if(!$this->_allowCustomPaging && $this->getIsLastPage())
- return $this->getDataSourceCount()-$this->getFirstIndexInPage();
- return $this->_pageSize;
- }
-
- /**
- * Returns the number of items in the current page.
- * This method is required by Countable interface.
- * @return integer number of items in the current page.
- */
- public function count()
- {
- return $this->getCount();
- }
-
- /**
- * @return integer number of pages
- */
- public function getPageCount()
- {
- if($this->_dataSource===null)
- return 0;
- $count=$this->getDataSourceCount();
- if(!$this->_allowPaging || $count<=0)
- return 1;
- return (int)(($count+$this->_pageSize-1)/$this->_pageSize);
- }
-
- /**
- * @return boolean whether the current page is the first page Defaults to false.
- */
- public function getIsFirstPage()
- {
- if($this->_allowPaging)
- return $this->_currentPageIndex===0;
- else
- return true;
- }
-
- /**
- * @return boolean whether the current page is the last page
- */
- public function getIsLastPage()
- {
- if($this->_allowPaging)
- return $this->_currentPageIndex===$this->getPageCount()-1;
- else
- return true;
- }
-
- /**
- * @return integer the index of the item in data source, where the item is the first in
- * current page
- */
- public function getFirstIndexInPage()
- {
- if($this->_dataSource!==null && $this->_allowPaging && !$this->_allowCustomPaging)
- return $this->_currentPageIndex*$this->_pageSize;
- else
- return 0;
- }
-
- /**
- * @return integer number of items in data source, if available
- */
- public function getDataSourceCount()
- {
- if($this->_dataSource===null)
- return 0;
- else if($this->_allowCustomPaging)
- return $this->_virtualCount;
- else
- return $this->_dataSource->getCount();
- }
-
- /**
- * @return Iterator iterator
- */
- public function getIterator()
- {
- if($this->_dataSource instanceof TList)
- return new TPagedListIterator($this->_dataSource,$this->getFirstIndexInPage(),$this->getCount());
- else if($this->_dataSource instanceof TMap)
- return new TPagedMapIterator($this->_dataSource,$this->getFirstIndexInPage(),$this->getCount());
- else
- return null;
- }
-}
-
-
-
-/**
- * TPagedListIterator class
- *
- * TPagedListIterator implements Iterator interface.
- *
- * TPagedListIterator is used by {@link TPagedDataSource}. It allows TPagedDataSource
- * to return a new iterator for traversing the items in a {@link TList} object.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Collections
- * @since 3.0
- */
-class TPagedListIterator implements Iterator
-{
- private $_list;
- private $_startIndex;
- private $_count;
- private $_index;
-
- /**
- * Constructor.
- * @param TList the data to be iterated through
- * @param integer start index
- * @param integer number of items to be iterated through
- */
- public function __construct(TList $list,$startIndex,$count)
- {
- $this->_list=$list;
- $this->_index=0;
- $this->_startIndex=$startIndex;
- if($startIndex+$count>$list->getCount())
- $this->_count=$list->getCount()-$startIndex;
- else
- $this->_count=$count;
- }
-
- /**
- * Rewinds internal array pointer.
- * This method is required by the interface Iterator.
- */
- public function rewind()
- {
- $this->_index=0;
- }
-
- /**
- * Returns the key of the current array item.
- * This method is required by the interface Iterator.
- * @return integer the key of the current array item
- */
- public function key()
- {
- return $this->_index;
- }
-
- /**
- * Returns the current array item.
- * This method is required by the interface Iterator.
- * @return mixed the current array item
- */
- public function current()
- {
- return $this->_list->itemAt($this->_startIndex+$this->_index);
- }
-
- /**
- * Moves the internal pointer to the next array item.
- * This method is required by the interface Iterator.
- */
- public function next()
- {
- $this->_index++;
- }
-
- /**
- * Returns whether there is an item at current position.
- * This method is required by the interface Iterator.
- * @return boolean
- */
- public function valid()
- {
- return $this->_index<$this->_count;
- }
-}
-
-/**
- * TPagedMapIterator class
- *
- * TPagedMapIterator implements Iterator interface.
- *
- * TPagedMapIterator is used by {@link TPagedDataSource}. It allows TPagedDataSource
- * to return a new iterator for traversing the items in a {@link TMap} object.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Collections
- * @since 3.0
- */
-class TPagedMapIterator implements Iterator
-{
- private $_map;
- private $_startIndex;
- private $_count;
- private $_index;
- private $_iterator;
-
- /**
- * Constructor.
- * @param array the data to be iterated through
- */
- public function __construct(TMap $map,$startIndex,$count)
- {
- $this->_map=$map;
- $this->_index=0;
- $this->_startIndex=$startIndex;
- if($startIndex+$count>$map->getCount())
- $this->_count=$map->getCount()-$startIndex;
- else
- $this->_count=$count;
- $this->_iterator=$map->getIterator();
- }
-
- /**
- * Rewinds internal array pointer.
- * This method is required by the interface Iterator.
- */
- public function rewind()
- {
- $this->_iterator->rewind();
- for($i=0;$i<$this->_startIndex;++$i)
- $this->_iterator->next();
- $this->_index=0;
- }
-
- /**
- * Returns the key of the current array item.
- * This method is required by the interface Iterator.
- * @return integer the key of the current array item
- */
- public function key()
- {
- return $this->_iterator->key();
- }
-
- /**
- * Returns the current array item.
- * This method is required by the interface Iterator.
- * @return mixed the current array item
- */
- public function current()
- {
- return $this->_iterator->current();
- }
-
- /**
- * Moves the internal pointer to the next array item.
- * This method is required by the interface Iterator.
- */
- public function next()
- {
- $this->_index++;
- $this->_iterator->next();
- }
-
- /**
- * Returns whether there is an item at current position.
- * This method is required by the interface Iterator.
- * @return boolean
- */
- public function valid()
- {
- return $this->_index<$this->_count;
- }
-}
-
+ * @license http://www.pradosoft.com/license/ + * @version $Id$ + * @package System.Collections + */ + +/** + * TPagedDataSource class + * + * TPagedDataSource implements an integer-indexed collection class with paging functionality. + * + * Data items in TPagedDataSource can be traversed using <b>foreach</b> + * PHP statement like the following, + * <code> + * foreach($pagedDataSource as $dataItem) + * </code> + * The data are fetched from {@link setDataSource DataSource}. Only the items + * within the specified page will be returned and traversed. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Id$ + * @package System.Collections + * @since 3.0 + */ +class TPagedDataSource extends TComponent implements IteratorAggregate,Countable +{ + /** + * @var mixed original data source + */ + private $_dataSource=null; + /** + * @var integer number of items in each page + */ + private $_pageSize=10; + /** + * @var integer current page index + */ + private $_currentPageIndex=0; + /** + * @var boolean whether to allow paging + */ + private $_allowPaging=false; + /** + * @var boolean whether to allow custom paging + */ + private $_allowCustomPaging=false; + /** + * @var integer user-assigned number of items in data source + */ + private $_virtualCount=0; + + /** + * @return mixed original data source. Defaults to null. + */ + public function getDataSource() + { + return $this->_dataSource; + } + + /** + * @param mixed original data source + */ + public function setDataSource($value) + { + if(!($value instanceof TMap) && !($value instanceof TList)) + { + if(is_array($value)) + $value=new TMap($value); + else if($value instanceof Traversable) + $value=new TList($value); + else if($value!==null) + throw new TInvalidDataTypeException('pageddatasource_datasource_invalid'); + } + $this->_dataSource=$value; + } + + /** + * @return integer number of items in each page. Defaults to 10. + */ + public function getPageSize() + { + return $this->_pageSize; + } + + /** + * @param integer number of items in each page + */ + public function setPageSize($value) + { + if(($value=TPropertyValue::ensureInteger($value))>0) + $this->_pageSize=$value; + else + throw new TInvalidDataValueException('pageddatasource_pagesize_invalid'); + } + + /** + * @return integer current page index. Defaults to 0. + */ + public function getCurrentPageIndex() + { + return $this->_currentPageIndex; + } + + /** + * @param integer current page index + */ + public function setCurrentPageIndex($value) + { + if(($value=TPropertyValue::ensureInteger($value))<0) + $value=0; + $this->_currentPageIndex=$value; + } + + /** + * @return boolean whether to allow paging. Defaults to false. + */ + public function getAllowPaging() + { + return $this->_allowPaging; + } + + /** + * @param boolean whether to allow paging + */ + public function setAllowPaging($value) + { + $this->_allowPaging=TPropertyValue::ensureBoolean($value); + } + + /** + * @return boolean whether to allow custom paging. Defaults to false. + */ + public function getAllowCustomPaging() + { + return $this->_allowCustomPaging; + } + + /** + * @param boolean whether to allow custom paging + */ + public function setAllowCustomPaging($value) + { + $this->_allowCustomPaging=TPropertyValue::ensureBoolean($value); + } + + /** + * @return integer user-assigned number of items in data source Defaults to 0. + */ + public function getVirtualItemCount() + { + return $this->_virtualCount; + } + + /** + * @param integer user-assigned number of items in data source + */ + public function setVirtualItemCount($value) + { + if(($value=TPropertyValue::ensureInteger($value))>=0) + $this->_virtualCount=$value; + else + throw new TInvalidDataValueException('pageddatasource_virtualitemcount_invalid'); + } + + /** + * @return integer number of items in current page + */ + public function getCount() + { + if($this->_dataSource===null) + return 0; + if(!$this->_allowPaging) + return $this->getDataSourceCount(); + if(!$this->_allowCustomPaging && $this->getIsLastPage()) + return $this->getDataSourceCount()-$this->getFirstIndexInPage(); + return $this->_pageSize; + } + + /** + * Returns the number of items in the current page. + * This method is required by Countable interface. + * @return integer number of items in the current page. + */ + public function count() + { + return $this->getCount(); + } + + /** + * @return integer number of pages + */ + public function getPageCount() + { + if($this->_dataSource===null) + return 0; + $count=$this->getDataSourceCount(); + if(!$this->_allowPaging || $count<=0) + return 1; + return (int)(($count+$this->_pageSize-1)/$this->_pageSize); + } + + /** + * @return boolean whether the current page is the first page Defaults to false. + */ + public function getIsFirstPage() + { + if($this->_allowPaging) + return $this->_currentPageIndex===0; + else + return true; + } + + /** + * @return boolean whether the current page is the last page + */ + public function getIsLastPage() + { + if($this->_allowPaging) + return $this->_currentPageIndex===$this->getPageCount()-1; + else + return true; + } + + /** + * @return integer the index of the item in data source, where the item is the first in + * current page + */ + public function getFirstIndexInPage() + { + if($this->_dataSource!==null && $this->_allowPaging && !$this->_allowCustomPaging) + return $this->_currentPageIndex*$this->_pageSize; + else + return 0; + } + + /** + * @return integer number of items in data source, if available + */ + public function getDataSourceCount() + { + if($this->_dataSource===null) + return 0; + else if($this->_allowCustomPaging) + return $this->_virtualCount; + else + return $this->_dataSource->getCount(); + } + + /** + * @return Iterator iterator + */ + public function getIterator() + { + if($this->_dataSource instanceof TList) + return new TPagedListIterator($this->_dataSource,$this->getFirstIndexInPage(),$this->getCount()); + else if($this->_dataSource instanceof TMap) + return new TPagedMapIterator($this->_dataSource,$this->getFirstIndexInPage(),$this->getCount()); + else + return null; + } +} + + + +/** + * TPagedListIterator class + * + * TPagedListIterator implements Iterator interface. + * + * TPagedListIterator is used by {@link TPagedDataSource}. It allows TPagedDataSource + * to return a new iterator for traversing the items in a {@link TList} object. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Id$ + * @package System.Collections + * @since 3.0 + */ +class TPagedListIterator implements Iterator +{ + private $_list; + private $_startIndex; + private $_count; + private $_index; + + /** + * Constructor. + * @param TList the data to be iterated through + * @param integer start index + * @param integer number of items to be iterated through + */ + public function __construct(TList $list,$startIndex,$count) + { + $this->_list=$list; + $this->_index=0; + $this->_startIndex=$startIndex; + if($startIndex+$count>$list->getCount()) + $this->_count=$list->getCount()-$startIndex; + else + $this->_count=$count; + } + + /** + * Rewinds internal array pointer. + * This method is required by the interface Iterator. + */ + public function rewind() + { + $this->_index=0; + } + + /** + * Returns the key of the current array item. + * This method is required by the interface Iterator. + * @return integer the key of the current array item + */ + public function key() + { + return $this->_index; + } + + /** + * Returns the current array item. + * This method is required by the interface Iterator. + * @return mixed the current array item + */ + public function current() + { + return $this->_list->itemAt($this->_startIndex+$this->_index); + } + + /** + * Moves the internal pointer to the next array item. + * This method is required by the interface Iterator. + */ + public function next() + { + $this->_index++; + } + + /** + * Returns whether there is an item at current position. + * This method is required by the interface Iterator. + * @return boolean + */ + public function valid() + { + return $this->_index<$this->_count; + } +} + +/** + * TPagedMapIterator class + * + * TPagedMapIterator implements Iterator interface. + * + * TPagedMapIterator is used by {@link TPagedDataSource}. It allows TPagedDataSource + * to return a new iterator for traversing the items in a {@link TMap} object. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @version $Id$ + * @package System.Collections + * @since 3.0 + */ +class TPagedMapIterator implements Iterator +{ + private $_map; + private $_startIndex; + private $_count; + private $_index; + private $_iterator; + + /** + * Constructor. + * @param array the data to be iterated through + */ + public function __construct(TMap $map,$startIndex,$count) + { + $this->_map=$map; + $this->_index=0; + $this->_startIndex=$startIndex; + if($startIndex+$count>$map->getCount()) + $this->_count=$map->getCount()-$startIndex; + else + $this->_count=$count; + $this->_iterator=$map->getIterator(); + } + + /** + * Rewinds internal array pointer. + * This method is required by the interface Iterator. + */ + public function rewind() + { + $this->_iterator->rewind(); + for($i=0;$i<$this->_startIndex;++$i) + $this->_iterator->next(); + $this->_index=0; + } + + /** + * Returns the key of the current array item. + * This method is required by the interface Iterator. + * @return integer the key of the current array item + */ + public function key() + { + return $this->_iterator->key(); + } + + /** + * Returns the current array item. + * This method is required by the interface Iterator. + * @return mixed the current array item + */ + public function current() + { + return $this->_iterator->current(); + } + + /** + * Moves the internal pointer to the next array item. + * This method is required by the interface Iterator. + */ + public function next() + { + $this->_index++; + $this->_iterator->next(); + } + + /** + * Returns whether there is an item at current position. + * This method is required by the interface Iterator. + * @return boolean + */ + public function valid() + { + return $this->_index<$this->_count; + } +} + |