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[yaffs-website] / vendor / easyrdf / easyrdf / lib / EasyRdf / Literal / Boolean.php

diff --git a/vendor/easyrdf/easyrdf/lib/EasyRdf/Literal/Boolean.php b/vendor/easyrdf/easyrdf/lib/EasyRdf/Literal/Boolean.php
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+<?php
+
+/**
+ * EasyRdf
+ *
+ * LICENSE
+ *
+ * Copyright (c) 2009-2013 Nicholas J Humfrey.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or
+ *    promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * 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.
+ *
+ * @package    EasyRdf
+ * @copyright  Copyright (c) 2009-2013 Nicholas J Humfrey
+ * @license    http://www.opensource.org/licenses/bsd-license.php
+ */
+
+/**
+ * Class that represents an RDF Literal of datatype xsd:boolean
+ *
+ * @package    EasyRdf
+ * @link       http://www.w3.org/TR/xmlschema-2/#boolean
+ * @copyright  Copyright (c) 2009-2013 Nicholas J Humfrey
+ * @license    http://www.opensource.org/licenses/bsd-license.php
+ */
+class EasyRdf_Literal_Boolean extends EasyRdf_Literal
+{
+    /** Constructor for creating a new boolean literal
+     *
+     * If the value is not a string, then it will be converted to 'true' or 'false'.
+     *
+     * @param  mixed  $value     The value of the literal
+     * @param  string $lang      Should be null (literals with a datatype can't have a language)
+     * @param  string $datatype  Optional datatype (default 'xsd:boolean')
+     * @return object EasyRdf_Literal_Boolean
+     */
+    public function __construct($value, $lang = null, $datatype = null)
+    {
+        if (!is_string($value)) {
+            $value = $value ? 'true' : 'false';
+        }
+        parent::__construct($value, null, $datatype);
+    }
+
+    /** Return the value of the literal cast to a PHP bool
+     *
+     * If the value is 'true' or '1' return true, otherwise returns false.
+     *
+     * @return bool
+     */
+    public function getValue()
+    {
+        return strtolower($this->value) === 'true' or $this->value === '1';
+    }
+
+    /** Return true if the value of the literal is 'true' or '1'
+     *
+     * @return bool
+     */
+    public function isTrue()
+    {
+        return strtolower($this->value) === 'true' or $this->value === '1';
+    }
+
+    /** Return true if the value of the literal is 'false' or '0'
+     *
+     * @return bool
+     */
+    public function isFalse()
+    {
+        return strtolower($this->value) === 'false' or $this->value === '0';
+    }
+}