1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
<?php
namespace EasyRdf\Literal;
/**
* EasyRdf
*
* LICENSE
*
* Copyright (c) 2009-2014 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) 2009-2014 Nicholas J Humfrey
* @license https://www.opensource.org/licenses/bsd-license.php
*/
use EasyRdf\Literal;
/**
* Class that represents an RDF Literal of datatype xsd:date
*
* @package EasyRdf
* @link http://www.w3.org/TR/xmlschema-2/#date
* @copyright Copyright (c) 2009-2014 Nicholas J Humfrey
* @license https://www.opensource.org/licenses/bsd-license.php
*/
class Date extends Literal
{
/** Constructor for creating a new date literal
*
* If the value is a DateTime object, then it will be converted to the xsd:date format.
* If no value is given or is is null, then the current date is used.
*
* @see \DateTime
*
* @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 $datatype Optional datatype (default 'xsd:date')
*/
public function __construct($value = null, $lang = null, $datatype = null)
{
// If $value is null, use today's date
if (is_null($value)) {
$value = new \DateTime('today');
}
// Convert DateTime object into string
if ($value instanceof \DateTime) {
$value = $value->format('Y-m-d');
}
parent::__construct($value, null, $datatype);
}
/** Parses a string using DateTime and creates a new literal
*
* Example:
* $date = EasyRdf\Literal\Date::parse('1 January 2011');
*
* @see DateTime
* @param string $value The date to parse
*
* @return self
*/
public static function parse($value)
{
$value = new \DateTime($value);
return new self($value);
}
/** Returns the date as a PHP DateTime object
*
* @see DateTime::format
* @return string
*/
public function getValue()
{
return new \DateTime($this->value);
}
/** Returns date formatted according to given format
*
* @see DateTime::format
* @param string $format
*
* @return string
*/
public function format($format)
{
return $this->getValue()->format($format);
}
/** A full integer representation of the year, 4 digits
*
* @return integer
*/
public function year()
{
return (int)$this->format('Y');
}
/** Integer representation of the month
*
* @return integer
*/
public function month()
{
return (int)$this->format('m');
}
/** Integer representation of the day of the month
*
* @return integer
*/
public function day()
{
return (int)$this->format('d');
}
}
|
