Add semantic data to in-memory (#1202)

To avoid having competing data being stored at a different point in time during a request aimed for the same subject, property value assignments are collected and stored in-memory before the finale Store::updateData process will be invoked once.

// Create in-memory ParserOutput transfer object
$parserData = ApplicationFactory::getInstance()->newParserData(
    $parser->getTitle(),
    $parser->getOutput()
);

$subject = $parserData->getSubject();
$property = new DIProperty( 'SomeProperty' );

// Add individual instances of a value for a known property
foreach ( $values as $value ) {
    $dataValue = DataValueFactory::getInstance()->newDataValueByProperty(
        $property,
        trim( $value ), // Text value
        false,
        $subject
    );

    $parserData->addDataValue( $dataValue );
}

// Add individual instances of a value for a property only known by
// its textual representation
foreach ( $values as $value ) {
    $dataValue = DataValueFactory::getInstance()->newDataValueByText(
        $property,
        trim( $value ), // Text value
        false,
        $subject
    );

    // Adds the object to the SemanticData container you could also use
    // $parserData->getSemanticData()->addPropertyObjectValue( ...)
    $parserData->addDataValue( $dataValue );
}

// Ensures that objects are pushed to the ParserOutput
$parserData->pushSemanticDataToParserOutput();

Access semantic data currently stored in-memory

// Create in-memory ParserOutput transfer object
$parserData = ApplicationFactory::getInstance()->newParserData(
    $parser->getTitle(),
    $parser->getOutput()
);

// Access to the data store in-memory
$semanticData = $parserData->getSemanticData();

Read semantic data from DB

$subject = new DIWikiPage( 'Foo', NS_MAIN );

$semanticData = ApplicationFactory::getInstance()->getStore->getSemanticData(
    $subject
);