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<?php |
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namespace sweetrdf\InMemoryStoreSqlite\Rdf; |
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/* |
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* This file is part of the sweetrdf/InMemoryStoreSqlite package and licensed under |
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* the terms of the GPL-3 license. |
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* |
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* (c) Konrad Abicht <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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use Exception; |
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use rdfInterface\Literal as iLiteral; |
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use rdfInterface\Term; |
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use Stringable; |
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use sweetrdf\InMemoryStoreSqlite\NamespaceHelper; |
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class Literal implements iLiteral |
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{ |
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private int | float | string | bool | Stringable $value; |
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private ?string $lang; |
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private ?string $datatype; |
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public function __construct( |
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int | float | string | bool | Stringable $value, |
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?string $lang = null, |
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?string $datatype = null |
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) { |
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$this->value = $value; |
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/* |
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* @see https://www.w3.org/TR/rdf11-concepts/#section-Graph-Literal |
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*/ |
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if (!empty($lang)) { |
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$this->lang = $lang; |
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$this->datatype = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#langString'; |
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} else { |
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$this->lang = null; |
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$this->datatype = $datatype ?? NamespaceHelper::NAMESPACE_XSD.'string'; |
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} |
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} |
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public function __toString(): string |
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{ |
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$langtype = ''; |
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if (!empty($this->lang)) { |
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$langtype = '@'.$this->lang; |
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} elseif (!empty($this->datatype)) { |
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$langtype = "^^<$this->datatype>"; |
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} |
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return '"'.$this->value.'"'.$langtype; |
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} |
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public function getValue(): int | float | string | bool | Stringable |
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{ |
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return $this->value; |
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} |
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public function getLang(): ?string |
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{ |
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return $this->lang; |
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} |
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public function getDatatype(): string |
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{ |
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return $this->datatype; |
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} |
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public function getType(): string |
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{ |
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return \rdfInterface\TYPE_LITERAL; |
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} |
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public function equals(Term $term): bool |
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{ |
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return $this == $term; |
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} |
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public function withValue(int | float | string | bool | Stringable $value): self |
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{ |
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throw new Exception('withValue not implemented yet'); |
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} |
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public function withLang(?string $lang): self |
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{ |
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throw new Exception('withLang not implemented yet'); |
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} |
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public function withDatatype(?string $datatype): self |
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{ |
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throw new Exception('withDatatype not implemented yet'); |
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} |
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} |
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sweetrdf /
in-memory-store-sqlite
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