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local_grammar.go
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/
local_grammar.go
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package fmr
import (
"fmt"
"github.com/liuzl/ling"
"github.com/mitchellh/hashstructure"
)
func (g *Grammar) localGrammar(d *ling.Document) (*Grammar, error) {
if d == nil {
return nil, fmt.Errorf("document is empty")
}
g.regexpTag(d)
if len(d.Spans) == 0 && len(d.Tokens) == 0 {
return nil, nil
}
l := &Grammar{Name: "local", Rules: make(map[string]*Rule)}
for _, token := range d.Tokens {
k := ""
switch token.Type {
case ling.Word:
k = "word"
case ling.Punct:
k = "punct"
case ling.Symbol:
k = "symbol"
case ling.Letters:
k = "letters"
}
if k != "" {
rb := &RuleBody{
[]*Term{{Value: token.String(), Type: Terminal}}, nil}
hash, err := hashstructure.Hash(rb, nil)
if err != nil {
return nil, err
}
if _, has := l.Rules[k]; has {
l.Rules[k].Body[hash] = rb
} else {
l.Rules[k] = &Rule{k, map[uint64]*RuleBody{hash: rb}}
}
}
}
for _, span := range d.Spans {
if span.Annotations["value"] == nil {
continue
}
m, ok := span.Annotations["value"].(map[string]interface{})
if !ok {
continue
}
//terms := []*Term{{Value: span.String(), Type: Terminal}}
var terms []*Term
for i := span.Start; i < span.End; i++ {
terms = append(terms,
&Term{Value: span.Doc.Tokens[i].Text, Type: Terminal})
}
for k, values := range m {
rb := &RuleBody{terms, nil}
switch values.(type) {
case []interface{}:
args := []*Arg{}
for _, v := range values.([]interface{}) {
args = append(args, &Arg{"string", v})
}
rb.F = &FMR{"fmr.entity",
[]*Arg{{"string", k}, {"func", &FMR{"fmr.list", args}}},
}
rb.F = &FMR{"fmr.list",
[]*Arg{{"string", span.String()}, {"func", rb.F}}}
}
hash, err := hashstructure.Hash(rb, nil)
if err != nil {
return nil, err
}
if _, has := l.Rules[k]; has {
l.Rules[k].Body[hash] = rb
} else {
l.Rules[k] = &Rule{k, map[uint64]*RuleBody{hash: rb}}
}
}
}
if len(l.Rules) == 0 {
return nil, nil
}
/*
if err := l.refine("l"); err != nil {
return nil, err
}
*/
return l, nil
}