wikimedia / mediawiki-extensions-WikibaseQualityConstraints

	 * @throws ConstraintParameterException if the parameter is invalid or missing

	 * @return PropertyId

	 */

	public function parsePropertyParameter( array $constraintParameters, $constraintTypeItemId ) {

		$this->checkError( $constraintParameters );

		$propertyId = $this->config->get( 'WBQualityConstraintsPropertyId' );

		if ( !array_key_exists( $propertyId, $constraintParameters ) ) {

			throw new ConstraintParameterException(

				( new ViolationMessage( 'wbqc-violation-message-parameter-needed' ) )

					->withEntityId( new ItemId( $constraintTypeItemId ), Role::CONSTRAINT_TYPE_ITEM )

					->withEntityId( new PropertyId( $propertyId ), Role::CONSTRAINT_PARAMETER_PROPERTY )

			);

		}

		$this->requireSingleParameter( $constraintParameters, $propertyId );

		return $this->parsePropertyIdParameter( $constraintParameters[$propertyId][0], $propertyId );

	}

	private function parseItemIdParameter( PropertyValueSnak $snak, $parameterId ) {

		$dataValue = $snak->getDataValue();

	 * @throws ConstraintParameterException if the parameter is invalid or missing

	 * @return string

	 */

	public function parseFormatParameter( array $constraintParameters, $constraintTypeItemId ) {

		$this->checkError( $constraintParameters );

		$formatId = $this->config->get( 'WBQualityConstraintsFormatAsARegularExpressionId' );

		if ( !array_key_exists( $formatId, $constraintParameters ) ) {

			throw new ConstraintParameterException(

				( new ViolationMessage( 'wbqc-violation-message-parameter-needed' ) )

					->withEntityId( new ItemId( $constraintTypeItemId ), Role::CONSTRAINT_TYPE_ITEM )

					->withEntityId( new PropertyId( $formatId ), Role::CONSTRAINT_PARAMETER_PROPERTY )

			);

		}

		$this->requireSingleParameter( $constraintParameters, $formatId );

		return $this->parseStringParameter( $constraintParameters[$formatId][0], $formatId );

	}

	/**

	 * @param array $constraintParameters see {@link \WikibaseQuality\Constraint::getConstraintParameters()}