| 1 | <?php |
| 2 | /* |
| 3 | * $Id: Where.php 2702 2007-10-03 21:43:22Z Jonathan.Wage $ |
| 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_Condition'); |
| 22 | /** |
| 23 | * Doctrine_Query_Where |
| 24 | * |
| 25 | * @package Doctrine |
| 26 | * @subpackage Query |
| 27 | * @license http://www.opensource.org/licenses/lgpl-license.php LGPL |
| 28 | * @link www.phpdoctrine.com |
| 29 | * @since 1.0 |
| 30 | * @version $Revision: 2702 $ |
| 31 | * @author Konsta Vesterinen <kvesteri@cc.hut.fi> |
| 32 | */ |
| 33 | class Doctrine_Query_Where extends Doctrine_Query_Condition |
| 34 | { |
| 35 | public function load($where) |
| 36 | { |
| 37 | $where = Doctrine_Tokenizer::bracketTrim(trim($where)); |
| 38 | $conn = $this->query->getConnection(); |
| 39 | $terms = Doctrine_Tokenizer::sqlExplode($where); |
| 40 | |
| 41 | if (count($terms) > 1) { |
| 42 | if (substr($where, 0, 6) == 'EXISTS') { |
| 43 | return $this->parseExists($where, true); |
| 44 | } elseif (substr($where, 0, 10) == 'NOT EXISTS') { |
| 45 | return $this->parseExists($where, false); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | if (count($terms) < 3) { |
| 50 | $terms = Doctrine_Tokenizer::sqlExplode($where, array('=', '<', '<>', '>', '!=')); |
| 51 | } |
| 52 | |
| 53 | if (count($terms) > 1) { |
| 54 | $first = array_shift($terms); |
| 55 | $value = array_pop($terms); |
| 56 | $operator = trim(substr($where, strlen($first), -strlen($value))); |
| 57 | $table = null; |
| 58 | $field = null; |
| 59 | |
| 60 | if (strpos($first, "'") === false && strpos($first, '(') === false) { |
| 61 | // normal field reference found |
| 62 | $a = explode('.', $first); |
| 63 | |
| 64 | $field = array_pop($a); |
| 65 | $reference = implode('.', $a); |
| 66 | |
| 67 | if (empty($reference)) { |
| 68 | $map = $this->query->getRootDeclaration(); |
| 69 | |
| 70 | $alias = $this->query->getTableAlias($this->query->getRootAlias()); |
| 71 | $table = $map['table']; |
| 72 | } else { |
| 73 | $map = $this->query->load($reference, false); |
| 74 | |
| 75 | $alias = $this->query->getTableAlias($reference); |
| 76 | $table = $map['table']; |
| 77 | } |
| 78 | if ($this->query->getType() === Doctrine_Query::SELECT) { |
| 79 | $first = $conn->quoteIdentifier($alias) |
| 80 | . '.' |
| 81 | . $conn->quoteIdentifier($table->getColumnName($field)); |
| 82 | } else { |
| 83 | $first = $conn->quoteIdentifier($table->getColumnName($field)); |
| 84 | } |
| 85 | } else { |
| 86 | $first = $this->query->parseClause($first); |
| 87 | } |
| 88 | $sql = $first . ' ' . $operator . ' ' . $this->parseValue($value, $table, $field); |
| 89 | |
| 90 | return $sql; |
| 91 | } else { |
| 92 | |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | public function parseValue($value, Doctrine_Table $table = null, $field = null) |
| 97 | { |
| 98 | if (substr($value, 0, 1) == '(') { |
| 99 | // trim brackets |
| 100 | $trimmed = Doctrine_Tokenizer::bracketTrim($value); |
| 101 | |
| 102 | if (substr($trimmed, 0, 4) == 'FROM' || |
| 103 | substr($trimmed, 0, 6) == 'SELECT') { |
| 104 | |
| 105 | // subquery found |
| 106 | $q = new Doctrine_Query(); |
| 107 | $value = '(' . $q->isSubquery(true)->parseQuery($trimmed)->getQuery() . ')'; |
| 108 | |
| 109 | } elseif (substr($trimmed, 0, 4) == 'SQL:') { |
| 110 | $value = '(' . substr($trimmed, 4) . ')'; |
| 111 | } else { |
| 112 | // simple in expression found |
| 113 | $e = Doctrine_Tokenizer::sqlExplode($trimmed, ','); |
| 114 | |
| 115 | $value = array(); |
| 116 | |
| 117 | $index = false; |
| 118 | |
| 119 | foreach ($e as $part) { |
| 120 | if (isset($table) && isset($field)) { |
| 121 | $index = $table->enumIndex($field, trim($part, "'")); |
| 122 | } |
| 123 | |
| 124 | if ($index !== false) { |
| 125 | $value[] = $index; |
| 126 | } else { |
| 127 | $value[] = $this->parseLiteralValue($part); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | $value = '(' . implode(', ', $value) . ')'; |
| 132 | } |
| 133 | } elseif (substr($value, 0, 1) == ':' || $value === '?') { |
| 134 | // placeholder found |
| 135 | if (isset($table) && isset($field) && $table->getTypeOf($field) == 'enum') { |
| 136 | $this->query->addEnumParam($value, $table, $field); |
| 137 | } else { |
| 138 | $this->query->addEnumParam($value, null, null); |
| 139 | } |
| 140 | } else { |
| 141 | $enumIndex = false; |
| 142 | if (isset($table) && isset($field)) { |
| 143 | // check if value is enumerated value |
| 144 | $enumIndex = $table->enumIndex($field, trim($value, "'")); |
| 145 | } |
| 146 | |
| 147 | if ($enumIndex !== false) { |
| 148 | $value = $enumIndex; |
| 149 | } else { |
| 150 | $value = $this->parseLiteralValue($value); |
| 151 | } |
| 152 | } |
| 153 | return $value; |
| 154 | } |
| 155 | /** |
| 156 | * parses an EXISTS expression |
| 157 | * |
| 158 | * @param string $where query where part to be parsed |
| 159 | * @param boolean $negation whether or not to use the NOT keyword |
| 160 | * @return string |
| 161 | */ |
| 162 | public function parseExists($where, $negation) |
| 163 | { |
| 164 | $operator = ($negation) ? 'EXISTS' : 'NOT EXISTS'; |
| 165 | |
| 166 | $pos = strpos($where, '('); |
| 167 | |
| 168 | if ($pos == false) { |
| 169 | throw new Doctrine_Query_Exception('Unknown expression, expected a subquery with () -marks'); |
| 170 | } |
| 171 | |
| 172 | $sub = Doctrine_Tokenizer::bracketTrim(substr($where, $pos)); |
| 173 | |
| 174 | return $operator . ' (' . $this->query->createSubquery()->parseQuery($sub, false)->getQuery() . ')'; |
| 175 | } |
| 176 | } |