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<?php |
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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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* (c) Benjamin Nowack |
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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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namespace sweetrdf\InMemoryStoreSqlite; |
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/** |
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* This class provides helpers to handle RDF namespace related operations. |
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*/ |
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final class NamespaceHelper |
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{ |
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const BASE_NAMESPACE = 'sweetrdf://in-memory-store-sqlite/'; |
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const NAMESPACE_RDF = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'; |
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const NAMESPACE_XML = 'http://www.w3.org/XML/1998/namespace'; |
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const NAMESPACE_XSD = 'http://www.w3.org/2001/XMLSchema#'; |
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/** |
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* List of known and new namespaces + prefixes. |
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* |
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* @var array<string,string> |
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*/ |
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private array $namespaces = [ |
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'owl:' => 'http://www.w3.org/2002/07/owl#', |
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'rdf:' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#', |
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'rdfs:' => 'http://www.w3.org/2000/01/rdf-schema#', |
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'xsd:' => 'http://www.w3.org/2001/XMLSchema#', |
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]; |
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/** |
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* @return array<string,string> |
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*/ |
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public function getNamespaces(): array |
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{ |
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return $this->namespaces; |
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} |
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/** |
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* Get namespace by prefix. |
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*/ |
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public function getNamespace(string $prefix): ?string |
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{ |
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foreach ($this->namespaces as $p => $ns) { |
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if ($prefix == $p) { |
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return $ns; |
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} |
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} |
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return null; |
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} |
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/** |
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* Get prefix by namespace. |
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*/ |
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public function getPrefix(string $namespace): ?string |
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{ |
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foreach ($this->namespaces as $prefix => $ns) { |
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if ($namespace == $ns) { |
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return $prefix; |
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} |
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} |
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return null; |
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} |
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public function hasPrefix(string $prefix): bool |
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{ |
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return true === isset($this->namespaces[$prefix]); |
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} |
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public function setPrefix(string $prefix, string $namespace): void |
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{ |
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$this->namespaces[$prefix] = $namespace; |
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} |
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} |
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sweetrdf /
in-memory-store-sqlite
