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TokenParserBroker.php
001 <?php
002
003 /*
004 * This file is part of Twig.
005 *
006 * (c) 2010 Fabien Potencier
007 * (c) 2010 Arnaud Le Blanc
008 *
009 * For the full copyright and license information, please view the LICENSE
010 * file that was distributed with this source code.
011 */
012
013 /**
014 * Default implementation of a token parser broker.
015 *
016 * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
017 * @deprecated since 1.12 (to be removed in 2.0)
018 */
019 class Twig_TokenParserBroker implements Twig_TokenParserBrokerInterface
020 {
021 protected $parser;
022 protected $parsers = array();
023 protected $brokers = array();
024
025 /**
026 * Constructor.
027 *
028 * @param array|Traversable $parsers A Traversable of Twig_TokenParserInterface instances
029 * @param array|Traversable $brokers A Traversable of Twig_TokenParserBrokerInterface instances
030 */
031 public function __construct($parsers = array(), $brokers = array())
032 {
033 foreach ($parsers as $parser) {
034 if (!$parser instanceof Twig_TokenParserInterface) {
035 throw new LogicException('$parsers must a an array of Twig_TokenParserInterface');
036 }
037 $this->parsers[$parser->getTag()] = $parser;
038 }
039 foreach ($brokers as $broker) {
040 if (!$broker instanceof Twig_TokenParserBrokerInterface) {
041 throw new LogicException('$brokers must a an array of Twig_TokenParserBrokerInterface');
042 }
043 $this->brokers[] = $broker;
044 }
045 }
046
047 /**
048 * Adds a TokenParser.
049 *
050 * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
051 */
052 public function addTokenParser(Twig_TokenParserInterface $parser)
053 {
054 $this->parsers[$parser->getTag()] = $parser;
055 }
056
057 /**
058 * Removes a TokenParser.
059 *
060 * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
061 */
062 public function removeTokenParser(Twig_TokenParserInterface $parser)
063 {
064 $name = $parser->getTag();
065 if (isset($this->parsers[$name]) && $parser === $this->parsers[$name]) {
066 unset($this->parsers[$name]);
067 }
068 }
069
070 /**
071 * Adds a TokenParserBroker.
072 *
073 * @param Twig_TokenParserBroker $broker A Twig_TokenParserBroker instance
074 */
075 public function addTokenParserBroker(Twig_TokenParserBroker $broker)
076 {
077 $this->brokers[] = $broker;
078 }
079
080 /**
081 * Removes a TokenParserBroker.
082 *
083 * @param Twig_TokenParserBroker $broker A Twig_TokenParserBroker instance
084 */
085 public function removeTokenParserBroker(Twig_TokenParserBroker $broker)
086 {
087 if (false !== $pos = array_search($broker, $this->brokers)) {
088 unset($this->brokers[$pos]);
089 }
090 }
091
092 /**
093 * Gets a suitable TokenParser for a tag.
094 *
095 * First looks in parsers, then in brokers.
096 *
097 * @param string $tag A tag name
098 *
099 * @return null|Twig_TokenParserInterface A Twig_TokenParserInterface or null if no suitable TokenParser was found
100 */
101 public function getTokenParser($tag)
102 {
103 if (isset($this->parsers[$tag])) {
104 return $this->parsers[$tag];
105 }
106 $broker = end($this->brokers);
107 while (false !== $broker) {
108 $parser = $broker->getTokenParser($tag);
109 if (null !== $parser) {
110 return $parser;
111 }
112 $broker = prev($this->brokers);
113 }
114 }
115
116 public function getParsers()
117 {
118 return $this->parsers;
119 }
120
121 public function getParser()
122 {
123 return $this->parser;
124 }
125
126 public function setParser(Twig_ParserInterface $parser)
127 {
128 $this->parser = $parser;
129 foreach ($this->parsers as $tokenParser) {
130 $tokenParser->setParser($parser);
131 }
132 foreach ($this->brokers as $broker) {
133 $broker->setParser($parser);
134 }
135 }
136 }
137