1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
package main
import (
"fmt"
"github.com/spdx/gordf/rdfloader/parser"
xmlreader "github.com/spdx/gordf/rdfloader/xmlreader"
"os"
)
func main() {
// expects user to enter the file name.
// sample run :
// go run exampleRDFParser.go ../sample-docs/rdf/input.rdf
// checking if input arguments are ok.
if len(os.Args) != 2 {
fmt.Printf("Usage: %v <input.rdf>\n", os.Args[0])
fmt.Printf("\tTo parse the <input.rdf> file and\n")
fmt.Printf("\tPrint some of it's Triples\n")
os.Exit(1) // there was an error processing input.
}
filePath := os.Args[1]
xmlReader, err := xmlreader.XMLReaderFromFilePath(filePath)
if err != nil {
// error reading the rdf file.
fmt.Printf("error reading the rdf file %v: %v", filePath, err)
os.Exit(1)
}
rootBlock, err := xmlReader.Read()
if err != nil {
// error parsing the xml content
fmt.Printf("error parsing the xml content of the rdf file")
os.Exit(1)
}
rdfParser := parser.New()
err = rdfParser.Parse(rootBlock)
if err != nil {
fmt.Printf("error parsing file: %v\n", err)
os.Exit(1)
}
// the max number of triples to display
maxNTriples := 10
if len(rdfParser.Triples) < maxNTriples {
// in case the number of triples is less than the declared value.
maxNTriples = len(rdfParser.Triples)
}
i := 0
// parser.Triples is a dictionary of the form {triple-hash => triple}
for tripleHash := range rdfParser.Triples {
if i == maxNTriples {
break
}
i++
triple := rdfParser.Triples[tripleHash]
fmt.Printf("Triple %v:\n", i)
fmt.Println("\tSubject:", triple.Subject)
fmt.Println("\tPredicate:", triple.Predicate)
fmt.Println("\tObject:", triple.Object)
}
}
|
