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<?php
/**
* File containing the ezcConsoleArguments collection class.
*
* @package ConsoleTools
* @version 1.6.1
* @copyright Copyright (C) 2005-2010 eZ Systems AS. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
* @filesource
*/
/**
* Collection class for ezcConsoleArgument objects. Used in {@link ezcConsoleInput}.
*
* @package ConsoleTools
* @version 1.6.1
*/
class ezcConsoleArguments implements ArrayAccess, Iterator, Countable
{
/**
* Ordered list of arguments.
*
* @var array(ezcConsoleArgument)
*/
protected $ordered = array();
/**
* Named list of arguments.
*
* @var array(string=>ezcConsoleArgument)
*/
protected $named = array();
/**
* Returns if the given offset exists.
* This method is part of the ArrayAccess interface to allow access to the
* data of this object as if it was an array. Valid offsets are integers or
* strings. If an integer is used, it refers to the position in the command
* line. A string refers to the arguments name property.
*
* @param mixed $offset The offset to check.
* @return bool True when the offset exists, otherwise false.
*
* @throws ezcBaseValueException
* If the provided offset is neither an integer, nor a string.
*/
public function offsetExists( $offset )
{
switch ( gettype( $offset ) )
{
case "string":
return array_key_exists( $offset, $this->named );
case "integer":
return array_key_exists( $offset, $this->ordered );
default:
throw new ezcBaseValueException( "offset", $offset, "string or int" );
}
}
/**
* Returns the element with the given offset.
* This method is part of the ArrayAccess interface to allow access to the
* data of this object as if it was an array. Valid offsets are integers or
* strings. If an integer is used, it refers to the position in the command
* line. A string refers to the arguments name property.
*
* @param string|integer $offset The offset to check.
* @return ezcConsoleArgument
*
* @throws ezcBaseValueException
* If the provided offset is neither an integer, nor a string.
*/
public function offsetGet( $offset )
{
switch ( gettype( $offset ) )
{
case "string":
if ( isset( $this[$offset] ) )
{
return $this->named[$offset];
}
break;
case "integer":
if ( isset( $this[$offset] ) )
{
return $this->ordered[$offset];
}
break;
default:
throw new ezcBaseValueException( "offset", $offset, "string or int" );
}
throw new ezcBasePropertyNotFoundException( $offset );
}
/**
* Set the element with the given offset.
* This method is part of the ArrayAccess interface to allow access to the
* data of this object as if it was an array. In contrast to the other
* ArrayAccess implementations of this class, this method allows only integer
* keys.
*
* @param int $offset The offset to assign an item to.
* @param ezcConsoleArgument $value The argument object to register.
* @return void
*
* @throws ezcBaseValueException
* If a non integer offset is provided.
* @throws ezcBaseValueException
* If the provided value is not of type {@ling ezcConsoleTableRow}.
* @throws ezcConsoleArgumentAlreadyRegisteredException
* If an argument with the given offset or name is already registered.
*/
public function offsetSet( $offset, $value )
{
// Determine key if not set (using $obj[] = ...)
if ( $offset === null )
{
$offset = count( $this->ordered ) === 0 ? 0 : max( array_keys( $this->ordered ) ) + 1;
}
// Set access only allowed with integer values
if ( !is_int( $offset ) )
{
throw new ezcBaseValueException( "offset", $offset, "int" );
}
switch ( true )
{
case ( $value instanceof ezcConsoleArgument ):
if ( isset( $this->ordered[$offset] ) )
{
throw new ezcConsoleArgumentAlreadyRegisteredException( $offset, ezcConsoleArgumentAlreadyRegisteredException::ORDERED );
}
if ( isset( $this->named[$value->name] ) )
{
throw new ezcConsoleArgumentAlreadyRegisteredException( $value->name, ezcConsoleArgumentAlreadyRegisteredException::NAMED );
}
$this->named[$value->name] = $value;
$this->ordered[$offset] = $value;
break;
case ( $value === null ):
// Aliasing unset() with assignement to null
unset( $this->named[$this->ordered[$offset]->name] );
unset( $this->ordered[$offset] );
break;
default:
throw new ezcBaseValueException( "value", $value, "ezcConsoleArgument or null" );
}
}
/**
* Unset the element with the given offset.
* This method is part of the ArrayAccess interface to allow access to the
* data of this object as if it was an array. In contrast to the other
* ArrayAccess implementations of this class, this method allows only integer
* keys.
*
* @param int $offset The offset to unset the value for.
* @return void
*
* @throws ezcBaseValueException
* If a non numeric row offset is used.
*/
public function offsetUnset( $offset )
{
// Set access only allowed with integer values
if ( is_int( $offset ) === false )
{
throw new ezcBaseValueException( "offset", $offset, "int" );
}
unset( $this->named[$this->ordered[$offset]->name] );
unset( $this->ordered[$offset] );
}
/**
* Returns the currently selected argument from the list.
* Used by foreach-Loops.
*
* @return ezcConsoleArgument
*/
public function current()
{
return current( $this->ordered );
}
/**
* Returns the key of the currently selected argument from the list.
* Used by foreach-Loops. In contrast to the iteration direction, which is
* defined by the ordered list of arguments, this is the name of the
* argument.
*
* @return string
*/
public function key()
{
return key( $this->ordered );
}
/**
* Advances the internal pointer to the next argument and returns it.
* Used by foreach-Loops.
*
* @return ezcConsoleArgument
*/
public function next()
{
return next( $this->ordered );
}
/**
* Rewinds the internal pointer to the first argument and returns it.
* Used by foreach-Loops.
*
* @return ezcConsoleArgument
*/
public function rewind()
{
// Called before foreach
ksort( $this->ordered );
return reset( $this->ordered );
}
/**
* Checks if the current position is valid.
* Used by foreach-Loops.
*
* @return bool
*/
public function valid()
{
return ( current( $this->ordered ) !== false );
}
/**
* Returns the number of registered arguments.
*
* @return int
*/
public function count()
{
return count( $this->ordered );
}
}
?>