// ExportBleve will dump all the index rows from
// the provided index and serialize them to the
// provided Writer
func ExportBleve(i index.Index, w io.Writer) error {
kvpw := NewWriter(w)
r, err := i.Reader()
if err != nil {
return fmt.Errorf("error getting reader: %v", err)
}
var dumpChan chan interface{}
dumpChan = r.DumpAll()
for dumpValue := range dumpChan {
switch dumpValue := dumpValue.(type) {
case index.IndexRow:
p := KVPair{K: dumpValue.Key(), V: dumpValue.Value()}
err = kvpw.Write(&p)
if err != nil {
return fmt.Errorf("error writing row: %v", err)
}
case error:
return fmt.Errorf("error dumping row: %v", dumpValue)
}
}
return nil
}
func NewTermSearcher(index index.Index, term string, field string, boost float64, explain bool) (*TermSearcher, error) {
reader, err := index.TermFieldReader([]byte(term), field)
if err != nil {
return nil, err
}
scorer := scorers.NewTermQueryScorer(term, field, boost, index.DocCount(), reader.Count(), explain)
return &TermSearcher{
index: index,
term: term,
field: field,
explain: explain,
reader: reader,
scorer: scorer,
}, nil
}
func NewTermPrefixSearcher(index index.Index, prefix string, field string, boost float64, explain bool) (*TermPrefixSearcher, error) {
// find the terms with this prefix
fieldReader, err := index.FieldReader(field, []byte(prefix), []byte(prefix))
// enumerate all the terms in the range
qsearchers := make([]search.Searcher, 0, 25)
tfd, err := fieldReader.Next()
for err == nil && tfd != nil {
qsearcher, err := NewTermSearcher(index, string(tfd.Term), field, 1.0, explain)
if err != nil {
return nil, err
}
qsearchers = append(qsearchers, qsearcher)
tfd, err = fieldReader.Next()
}
// build disjunction searcher of these ranges
searcher, err := NewDisjunctionSearcher(index, qsearchers, 0, explain)
if err != nil {
return nil, err
}
return &TermPrefixSearcher{
index: index,
prefix: prefix,
field: field,
explain: explain,
searcher: searcher,
}, nil
}
func NewMatchAllSearcher(index index.Index, boost float64, explain bool) (*MatchAllSearcher, error) {
reader, err := index.DocIDReader("", "")
if err != nil {
return nil, err
}
scorer := scorers.NewConstantScorer(1.0, boost, explain)
return &MatchAllSearcher{
index: index,
reader: reader,
scorer: scorer,
}, nil
}