<?php
	namespace Mocha\Oms;

	use Mocha\Core\InstanceKey;
	use Mocha\Core\InstanceReference;

	use Mocha\Core\KnownClassGuids;
	use Mocha\Core\KnownInstanceGuids;
	use Mocha\Core\KnownAttributeGuids;

	abstract class Oms
	{
		/**
		 * Gets the instance with the specified global identifier.
		 */
		public function getInstanceByGlobalIdentifier(string $inst) : ?InstanceReference
		{
			return null;
		}

		public function getRelatedInstances(InstanceReference $sourceInstance, InstanceReference $relationshipInstance, \DateTime $effectiveDate = null) : ?array
		{
			return null;
		}

		/**
		 * Gets the instance representing the default tenant.
		 */
		public function getTenantInstance() : ?InstanceReference
		{
			return $this->getInstanceByGlobalIdentifier(KnownInstanceGuids::DefaultTenant);
		}

		/**
		 * Gets the value of the given attribute on the specified instance.
		 */
		public function getAttributeValue($sourceInstance, $attributeInstance, $defaultValue = null, $effectiveDate = null) : ?string
		{
			return null;
		}
		public function getInstanceText($inst)
		{
			return $this->getAttributeValue($inst, $this->getInstanceByGlobalIdentifier(KnownAttributeGuids::Name));
		}

		public function setTenant($tenantName)
		{
			$this->_tenantName = $tenantName;
		}
	}
?>