Work in progress: implement DTD in metaschema parser

Note DTD implementation in golang xml parser is not straight forward yet
doable.

metaschema/generate.go

@@ -1,14 +1,14 @@
 package metaschema
 
 import (
-	"encoding/xml"
 	"fmt"
 	"io"
 	"os"
 	"strings"
 
 	"github.com/gocomply/metaschema/metaschema/parser"
 	"github.com/gocomply/metaschema/metaschema/templates"
+	"github.com/gocomply/metaschema/pkg/xml_dtd"
 )
 
 func Generate(metaschemaDir, goModule, outputDir string) error {
@@ -46,7 +46,7 @@ func Generate(metaschemaDir, goModule, outputDir string) error {
 func decode(metaschemaDir, goModule string, r io.Reader) (*parser.Metaschema, error) {
 	var meta parser.Metaschema
 
-	d := xml.NewDecoder(r)
+	d := xml_dtd.NewDecoder(r)
 
 	if err := d.Decode(&meta); err != nil {
 		return nil, fmt.Errorf("Error decoding metaschema: %s", err)

pkg/xml_dtd/decoder.go

@@ -0,0 +1,26 @@
+package xml_dtd
+
+import (
+	"encoding/xml"
+	"io"
+)
+
+type Decoder struct {
+	*xml.Decoder
+}
+
+func NewDecoder(r io.Reader) *Decoder {
+	dtd := &Decoder{
+		Decoder: xml.NewDecoder(r),
+	}
+	dtd.Entity = map[string]string{
+		"allowed-values-control-group-property-name": "TODO-FIX-THIS",
+		"allowed-values-component_inventory-item_property-name": "TODO-FIX-THIS",
+		"allowed-values-component_component_property-name": "TODO-FIX-THIS",
+	}
+	return dtd
+}
+
+func (d *Decoder) Decode(v interface{}) error {
+	return d.Decoder.Decode(v)
+}