index

type Batch struct {
	IndexOps    map[string]*document.Document
	InternalOps map[string][]byte
}

type DictEntry struct {
	Term  string
	Count uint64
}

type DocIDReader interface {
	Next() (string, error)
	Advance(ID string) (string, error)
	Close() error
}

type FieldDict interface {
	Next() (*DictEntry, error)
	Close() error
}

type FieldTerms map[string][]string

type Index interface {
	Open() error
	Close() error

	DocCount() (uint64, error)

	Update(doc *document.Document) error
	Delete(id string) error
	Batch(batch *Batch) error

	SetInternal(key, val []byte) error
	DeleteInternal(key []byte) error

	DumpAll() chan interface{}
	DumpDoc(id string) chan interface{}
	DumpFields() chan interface{}

	Reader() (IndexReader, error)

	Stats() json.Marshaler
}

type IndexReader interface {
	TermFieldReader(term []byte, field string) (TermFieldReader, error)
	DocIDReader(start, end string) (DocIDReader, error)

	FieldDict(field string) (FieldDict, error)
	FieldDictRange(field string, startTerm []byte, endTerm []byte) (FieldDict, error)
	FieldDictPrefix(field string, termPrefix []byte) (FieldDict, error)

	Document(id string) (*document.Document, error)
	DocumentFieldTerms(id string) (FieldTerms, error)

	Fields() ([]string, error)

	GetInternal(key []byte) ([]byte, error)

	DocCount() uint64

	Close() error
}

type TermFieldDoc struct {
	Term    string
	ID      string
	Freq    uint64
	Norm    float64
	Vectors []*TermFieldVector
}

type TermFieldReader interface {
	Next() (*TermFieldDoc, error)
	Advance(ID string) (*TermFieldDoc, error)
	Count() uint64
	Close() error
}

type TermFieldVector struct {
	Field string
	Pos   uint64
	Start uint64
	End   uint64
}