<?php
/**
* JAVA Autoboxing (part of Lotos Framework)
*
* Copyright (c) 2005-2010 Artur Graniszewski ([email protected])
* All rights reserved.
*
* @category Library
* @package Lotos
* @subpackage DataTypes
* @copyright Copyright (c) 2005-2010 Artur Graniszewski ([email protected])
* @license GNU LESSER GENERAL PUBLIC LICENSE Version 3, 29 June 2007
* @version $Id$
*/
// load required library
include("./variablesManager.php");
// and an example classes
include("./autoboxExampleClasses.php");
// create a new String object (see autoboxExampleClass.php for class definition)
$text = & string("Initial text");
echo 'The initial value of $text variable is "'.$text.'"<br />';
echo 'The initial datatype of $text variable is '.gettype($text).(is_object($text) ? ' ('.get_class($text).')': '').'<br />';
// ------------------------
echo "<hr />";
echo 'Now we are changing $text value to 12 (integer)<br />';
// now try to change the data type to PHP Integer:
$text = 12;
// from this moment $text should be an integer and not a String object (this is a default PHP behaviour),
// but thanks to our autoboxing, this isn't true. $text is still an object
echo 'The new value of $text variable is "'.$text.'"<br />';
echo 'The new datatype of $text variable is '.gettype($text).(is_object($text) ? ' ('.get_class($text).')': '').'<br />';
// ------------------------
echo "<hr />";
echo 'Now we are changing $text value to "autoboxing test" (plain PHP string)<br />';
// now try to change the data type to PHP plain string (not an object)::
$text = "autoboxing test";
// from this moment $text should become a plain string and not a String object (this is a default PHP behaviour),
// but thanks to our autoboxing, this isn't true. $text is still an object
echo 'The new value of $text variable is "'.$text.'"<br />';
// NOTE: now we are operating on $text like on any other object (using $text->toUpperCase()) - just like in JAVA anc C#
// without enabled autoboxing PHP would raise a FATAL ERROR in the next line of code:
echo 'The new uppercased value of $text variable is "'.$text->toUpperCase().'"<br />';
echo 'The new datatype of $text variable is '.gettype($text).(is_object($text) ? ' ('.get_class($text).')': '').'<br />';
// ------------------------
echo "<hr />";
echo 'The next test is to create new String object and overwrite last one with the new one<br />';
// now try to change the data type to another String object
$text = & string("New text object");
echo 'The new value of $text variable is "'.$text.'"<br />';
// NOTE: now we are operating on $text like on any other object (using $text->toUpperCase()) - just like in JAVA anc C#
echo 'The new uppercased value of $text variable is "'.$text->toUpperCase().'"<br />';
echo 'The new datatype of $text variable is '.gettype($text).(is_object($text) ? ' ('.get_class($text).')': '').'<br />';
// ------------------------
echo "<hr />";
echo 'This time we are overwritting $text with an object of the different type (other than String class)<br />';
// now try to change the data type to stdClass object
$text = new stdClass();
echo 'The new datatype of $text variable is '.gettype($text).(is_object($text) ? ' ('.get_class($text).')': '').'<br />';
echo 'Ofcourse unset() works also, autoboxed objects can be destroyed or overriden at any time by the PHP developer just like in a plain old PHP';
// ------------------------
echo "<hr />";
echo 'And finally some technical info from Lotos Variables Manager (used by autoboxing caching mechanism)<br />';
// now try some caching...
$text = & cachedString("test");
$text2 = & cachedString("test2");
$text3 = & cachedString("lorem ipsum");
$text4 = & cachedString("lorem ipsum");
$text5 = & cachedString("lorem ipsum");
echo '<pre>';
echo '<pre>After creating 2 unique texts and 3 copies of "lorem ipsum":<br />';
print_r(VariablesManager::getPoolUsage());
echo '</pre>';
echo '<pre>After deletion of $text5:<br />';
$text5 = "";
print_r(VariablesManager::getPoolUsage());
echo '</pre>';
echo '<pre>After deletion of $text4 and $text3:<br />';
$text4 = "";
$text3 = "";
print_r(VariablesManager::getPoolUsage());
echo '</pre>';
echo "<hr>";
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