1: <?php
 2: /**
 3:  * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 4:  * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 5:  *
 6:  * Licensed under The MIT License
 7:  * For full copyright and license information, please see the LICENSE.txt
 8:  * Redistributions of files must retain the above copyright notice.
 9:  *
10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
11:  * @link          https://cakephp.org CakePHP(tm) Project
12:  * @since         3.0.0
13:  * @license       https://opensource.org/licenses/mit-license.php MIT License
14:  */
15: namespace Cake\Database\Expression;
16: 
17: use Cake\Database\ExpressionInterface;
18: use Cake\Database\ValueBinder;
19: 
20: /**
21:  * Represents a single identifier name in the database.
22:  *
23:  * Identifier values are unsafe with user supplied data.
24:  * Values will be quoted when identifier quoting is enabled.
25:  *
26:  * @see \Cake\Database\Query::identifier()
27:  */
28: class IdentifierExpression implements ExpressionInterface
29: {
30: 
31:     /**
32:      * Holds the identifier string
33:      *
34:      * @var string
35:      */
36:     protected $_identifier;
37: 
38:     /**
39:      * Constructor
40:      *
41:      * @param string $identifier The identifier this expression represents
42:      */
43:     public function __construct($identifier)
44:     {
45:         $this->_identifier = $identifier;
46:     }
47: 
48:     /**
49:      * Sets the identifier this expression represents
50:      *
51:      * @param string $identifier The identifier
52:      * @return void
53:      */
54:     public function setIdentifier($identifier)
55:     {
56:         $this->_identifier = $identifier;
57:     }
58: 
59:     /**
60:      * Returns the identifier this expression represents
61:      *
62:      * @return string
63:      */
64:     public function getIdentifier()
65:     {
66:         return $this->_identifier;
67:     }
68: 
69:     /**
70:      * Converts the expression to its string representation
71:      *
72:      * @param \Cake\Database\ValueBinder $generator Placeholder generator object
73:      * @return string
74:      */
75:     public function sql(ValueBinder $generator)
76:     {
77:         return $this->_identifier;
78:     }
79: 
80:     /**
81:      * This method is a no-op, this is a leaf type of expression,
82:      * hence there is nothing to traverse
83:      *
84:      * @param callable $callable The callable to traverse with.
85:      * @return void
86:      */
87:     public function traverse(callable $callable)
88:     {
89:     }
90: }
91: