From 3d3f8d3832921f99daf8ce1953304763c2e76c62 Mon Sep 17 00:00:00 2001
From: wei <>
Date: Fri, 14 Apr 2006 06:22:09 +0000
Subject: Importing SQLMap + sample + docs.

---
 .../DataAccess/SQLMap/DataMapper/TSqlMapCache.php  | 165 +++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 framework/DataAccess/SQLMap/DataMapper/TSqlMapCache.php

(limited to 'framework/DataAccess/SQLMap/DataMapper/TSqlMapCache.php')

diff --git a/framework/DataAccess/SQLMap/DataMapper/TSqlMapCache.php b/framework/DataAccess/SQLMap/DataMapper/TSqlMapCache.php
new file mode 100644
index 00000000..8571d46d
--- /dev/null
+++ b/framework/DataAccess/SQLMap/DataMapper/TSqlMapCache.php
@@ -0,0 +1,165 @@
+<?php
+/**
+ * TSqlMapCache class file contains FIFO and LRU cache implementations.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Revision: $  $Date: $
+ * @package System.DataAccess.SQLMap
+ */
+
+interface ISqLMapCache
+{
+	public function remove($key);
+
+	public function flush();
+
+	public function get($key);
+
+	public function set($key, $value);
+
+	public function configure($properties);
+}
+
+/**
+ * Allow different implementation of caching strategy. See <tt>TSqlMapFifoCache</tt>
+ * for a first-in-first-out implementation. See <tt>TSqlMapLruCache</tt> for
+ * a least-recently-used cache implementation.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @version $Revision: $  $Date: $
+ * @package System.DataAccess.SQLMap
+ * @since 3.0
+ */
+abstract class TSqlMapCache implements ISqlMapCache
+{
+	protected $_keyList;
+	protected $_cache;
+	protected $_cacheSize = 100;
+
+	/**
+	 * Create a new cache with limited cache size.
+	 * @param integer maxium number of items to cache.
+	 */
+	public function __construct($cacheSize=100)
+	{
+		$this->_cache = new TMap;
+		$this->_cacheSize = intval($cacheSize);
+		$this->_keyList = new TList;
+	}
+
+	/**
+	 * Configures the Cache Size.
+	 * @param array list of properties
+	 */
+	public function configure($properties)
+	{
+		if(isset($properties['size']))
+			$this->_cacheSize = intval($properties['size']);
+	}
+
+	/**
+	 * @return object the object removed if exists, null otherwise.
+	 */
+	public function remove($key)
+	{
+		$object = $this->get($key);
+		$this->_cache->remove($key);
+		$this->_keyList->remove($key);
+		return $object;
+	}
+
+	/**
+	 * Clears the cache.
+	 */
+	public function flush()
+	{
+		$this->_keyList->clear();
+		$this->_cache->clear();
+	}
+
+}
+
+/**
+ * First-in-First-out cache implementation, removes
+ * object that was first added when the cache is full.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @version $Revision: $  $Date: $
+ * @package System.DataAccess.SQLMap
+ * @since 3.0
+ */
+class TSqlMapFifoCache extends TSqlMapCache
+{
+	/**
+	 * @return mixed Gets a cached object with the specified key.
+	 */
+	public function get($key)
+	{
+		return $this->_cache->itemAt($key);
+	}
+
+	/**
+	 * Adds an item with the specified key and value into cached data.
+	 * @param string cache key
+	 * @param mixed value to cache.
+	 */
+	public function set($key, $value)
+	{
+		$this->_cache->add($key, $value);
+		$this->_keyList->add($key);
+		if($this->_keyList->getCount() > $this->_cacheSize)
+		{
+			$oldestKey = $this->_keyList->removeAt(0);
+			$this->_cache->remove($oldestKey);
+		}
+	}
+}
+
+/**
+ * Least recently used cache implementation, removes
+ * object that was accessed last when the cache is full.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @version $Revision: $  $Date: $
+ * @package System.DataAccess.SQLMap
+ * @since 3.0
+ */
+class TSqlMapLruCache extends TSqlMapCache
+{
+	/**
+	 * @return mixed Gets a cached object with the specified key.
+	 */
+	public function get($key)
+	{
+		if($this->_keyList->contains($key))
+		{
+			$this->_keyList->remove($key);
+			$this->_keyList->add($key);
+			return $this->_cache->itemAt($key);
+		}
+		else
+			return null;
+	}
+
+	/**
+	 * Adds an item with the specified key and value into cached data.
+	 * @param string cache key
+	 * @param mixed value to cache.
+	 */
+	public function set($key, $value)
+	{
+		$this->_cache->add($key, $value);
+		$this->_keyList->add($key);
+		if($this->_keyList->getCount() > $this->_cacheSize)
+		{
+			$oldestKey = $this->_keyList->removeAt(0);
+			$this->_cache->remove($oldestKey);
+		}
+	}
+}
+
+
+?>
\ No newline at end of file
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