package vocab

import "net/url"

// On a Relationship object, the subject property identifies one of the connected
// individuals. For instance, for a Relationship object describing "John is
// related to Sally", subject would refer to John.
//
// Example 139 (https://www.w3.org/TR/activitystreams-vocabulary/#ex22a-jsonld):
//   {
//     "object": {
//       "name": "John",
//       "type": "Person"
//     },
//     "relationship": "http://purl.org/vocab/relationship/acquaintanceOf",
//     "subject": {
//       "name": "Sally",
//       "type": "Person"
//     },
//     "summary": "Sally is an acquaintance of John's",
//     "type": "Relationship"
//   }
type SubjectPropertyInterface interface {
	// Clear ensures no value of this property is set. Calling HasAny or any
	// of the 'Is' methods afterwards will return false.
	Clear()
	// GetIRI returns the IRI of this property. When IsIRI returns false,
	// GetIRI will return an arbitrary value.
	GetIRI() *url.URL
	// GetLink returns the value of this property. When IsLink returns false,
	// GetLink will return an arbitrary value.
	GetLink() LinkInterface
	// GetObject returns the value of this property. When IsObject returns
	// false, GetObject will return an arbitrary value.
	GetObject() ObjectInterface
	// HasAny returns true if any of the different values is set.
	HasAny() bool
	// IsIRI returns true if this property is an IRI. When true, use GetIRI
	// and SetIRI to access and set this property
	IsIRI() bool
	// IsLink returns true if this property has a type of "Link". When true,
	// use the GetLink and SetLink methods to access and set this property.
	IsLink() bool
	// IsObject returns true if this property has a type of "Object". When
	// true, use the GetObject and SetObject methods to access and set
	// this property.
	IsObject() bool
	// JSONLDContext returns the JSONLD URIs required in the context string
	// for this property and the specific values that are set. The value
	// in the map is the alias used to import the property's value or
	// values.
	JSONLDContext() map[string]string
	// KindIndex computes an arbitrary value for indexing this kind of value.
	// This is a leaky API detail only for folks looking to replace the
	// go-fed implementation. Applications should not use this method.
	KindIndex() int
	// LessThan compares two instances of this property with an arbitrary but
	// stable comparison. Applications should not use this because it is
	// only meant to help alternative implementations to go-fed to be able
	// to normalize nonfunctional properties.
	LessThan(o SubjectPropertyInterface) bool
	// Name returns the name of this property: "subject".
	Name() string
	// Serialize converts this into an interface representation suitable for
	// marshalling into a text or binary format. Applications should not
	// need this function as most typical use cases serialize types
	// instead of individual properties. It is exposed for alternatives to
	// go-fed implementations to use.
	Serialize() (interface{}, error)
	// SetIRI sets the value of this property. Calling IsIRI afterwards
	// returns true.
	SetIRI(v *url.URL)
	// SetLink sets the value of this property. Calling IsLink afterwards
	// returns true.
	SetLink(v LinkInterface)
	// SetObject sets the value of this property. Calling IsObject afterwards
	// returns true.
	SetObject(v ObjectInterface)
}