--- /dev/null
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+
+namespace Doctrine\DBAL\Platforms\Keywords;
+
+/**
+ * Abstract interface for a SQL reserved keyword dictionary.
+ *
+ * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @link www.doctrine-project.com
+ * @since 2.0
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ */
+abstract class KeywordList
+{
+ private $keywords = null;
+
+ /**
+ * Check if the given word is a keyword of this dialect/vendor platform.
+ *
+ * @param string $word
+ * @return bool
+ */
+ public function isKeyword($word)
+ {
+ if ($this->keywords === null) {
+ $this->initializeKeywords();
+ }
+
+ return isset($this->keywords[strtoupper($word)]);
+ }
+
+ protected function initializeKeywords()
+ {
+ $this->keywords = array_flip(array_map('strtoupper', $this->getKeywords()));
+ }
+
+ abstract protected function getKeywords();
+
+ /**
+ * Name of this keyword list.
+ *
+ * @return string
+ */
+ abstract public function getName();
+}