# Source for file From.php

Documentation is available at From.php

1. <?php
2. /*
3. * $Id: From.php 2217 2007-08-11 21:53:02Z zYne $
4. *
5. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
6. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
7. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
8. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
9. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
10. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
11. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
12. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
13. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
14. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
15. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
16. *
17. * This software consists of voluntary contributions made by many individuals
18. * and is licensed under the LGPL. For more information, see
19. * <http://www.phpdoctrine.com>.
20. */
21. Doctrine::autoload("Doctrine_Query_Part");
22. /**
23. * Doctrine_Query_From
24. *
25. * @package Doctrine
26. * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
27. * @category Object Relational Mapping
28. * @link www.phpdoctrine.com
29. * @since 1.0
30. * @version $Revision: 2217 $
31. * @author Konsta Vesterinen <kvesteri@cc.hut.fi>
32. */
33. class Doctrine_Query_From extends Doctrine_Query_Part
34. {
35. /**
36. * DQL FROM PARSER
37. * parses the from part of the query string
39. * @param string $str
40. * @return void
41. */
42. public function parse($str)
43. {
44. $str = trim($str);
45. $parts = Doctrine_Tokenizer::bracketExplode($str, 'JOIN');
47. $operator = false;
49. switch (trim($parts[0])) {
50. case 'INNER':
51. $operator = ':';
52. case 'LEFT':
53. array_shift($parts);
54. break;
55. }
58. $last = '';
60. foreach ($parts as $k => $part) {
61. $part = trim($part);
63. if (empty($part)) {
64. continue;
65. }
67. $e = explode(' ', $part);
69. if (end($e) == 'INNER' || end($e) == 'LEFT') {
70. $last = array_pop($e);
71. }
72. $part = implode(' ', $e);
74. foreach (Doctrine_Tokenizer::bracketExplode($part, ',') as $reference) {
75. $reference = trim($reference);
76. $e = explode(' ', $reference);
77. $e2 = explode('.', $e[0]);
79. if ($operator) {
80. $e[0] = array_shift($e2) . $operator . implode('.', $e2);
81. }
83. $table = $this->query->load(implode(' ', $e));
84. }
86. $operator = ($last == 'INNER') ? ':' : '.';
87. }
88. return null;
89. }
91. }