<?php

namespace ActivityPub\JsonLd\TripleStore;

/**
 * A triple represents a single fact in an RDF graph. A triple is made up a subject, a predicate, and an object.
 * The object can also have a type, e.g. "@id" for references to other resources or
 * "http://www.w3.org/2001/XMLSchema#dateTime" for date-time values.
 *
 * See https://www.w3.org/TR/rdf11-concepts/#data-model.
 *
 * Class Triple
 * @package ActivityPub\JsonLd\TripleStore
 */
class TypedRdfTriple
{
    /** @var string|null */
    private $subject;

    /** @var string|null */
    private $predicate;

    /** @var string|null */
    private $object;

    /** @var string|null */
    private $objectType;

    private function __construct($subject = null, $predicate = null, $object = null, $objectType = null)
    {
        $this->subject = $subject;
        $this->predicate = $predicate;
        $this->object = $object;
        $this->objectType = $objectType;
    }

    public static function create($subject = null, $predicate = null, $object = null, $objectType = null)
    {
        return new TypedRdfTriple( $subject, $predicate, $object, $objectType );
    }

    /**
     * @return string|null
     */
    public function getSubject()
    {
        return $this->subject;
    }

    /**
     * @param string $subject
     * @return TypedRdfTriple
     */
    public function setSubject($subject)
    {
        $this->subject = $subject;
        return $this;
    }

    /**
     * @return string|null
     */
    public function getPredicate()
    {
        return $this->predicate;
    }

    /**
     * @param string $predicate
     * @return TypedRdfTriple
     */
    public function setPredicate($predicate)
    {
        $this->predicate = $predicate;
        return $this;
    }

    /**
     * @return string|null
     */
    public function getObject()
    {
        return $this->object;
    }

    /**
     * @param string $object
     * @return TypedRdfTriple
     */
    public function setObject($object)
    {
        $this->object = $object;
        return $this;
    }

    /**
     * @return string|null
     */
    public function getObjectType()
    {
        return $this->objectType;
    }

    /**
     * @param string $objectType
     * @return TypedRdfTriple
     */
    public function setObjectType($objectType)
    {
        $this->objectType = $objectType;
        return $this;
    }

    /**
     * True if this triple has a subject, a predicate, and an object.
     * @return bool
     */
    public function isFullySpecified()
    {
        return $this->getSubject() && $this->getPredicate() && $this->getObject();
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTQzMjMxMDAxNDQ4NDczNCA3Njg3OTYxNzc2MDIwMzYwIDg0MzE2Nzc4MjI2NDkxNTM=