--- /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\Common\Annotations\Annotation;
+
+/**
+ * Annotation that can be used to signal to the parser
+ * to check the available values during the parsing process.
+ *
+ * @since 2.4
+ * @author Fabio B. Silva <fabio.bat.silva@gmail.com>
+ *
+ * @Annotation
+ * @Attributes({
+ * @Attribute("value", required = true, type = "array"),
+ * @Attribute("literal", required = false, type = "array")
+ * })
+ */
+final class Enum
+{
+ /**
+ * @var array
+ */
+ public $value;
+
+ /**
+ * Literal target declaration.
+ *
+ * @var array
+ */
+ public $literal;
+
+ /**
+ * Annotation constructor.
+ *
+ * @param array $values
+ *
+ * @throws \InvalidArgumentException
+ */
+ public function __construct(array $values)
+ {
+ if ( ! isset($values['literal'])) {
+ $values['literal'] = array();
+ }
+
+ foreach ($values['value'] as $var) {
+ if( ! is_scalar($var)) {
+ throw new \InvalidArgumentException(sprintf(
+ '@Enum supports only scalar values "%s" given.',
+ is_object($var) ? get_class($var) : gettype($var)
+ ));
+ }
+ }
+
+ foreach ($values['literal'] as $key => $var) {
+ if( ! in_array($key, $values['value'])) {
+ throw new \InvalidArgumentException(sprintf(
+ 'Undefined enumerator value "%s" for literal "%s".',
+ $key , $var
+ ));
+ }
+ }
+
+ $this->value = $values['value'];
+ $this->literal = $values['literal'];
+ }
+}