Merge pull request #6 from eloyucu/master

Add a function to get the value of a field by path and indexation.

xmlparser.go

@@ -65,6 +65,24 @@ func (x *XMLParser) Stream() chan *XMLElement {
 
 }
 
+func (element *XMLElement) GetValue(paths []string, indexes []int, attr string) string {
+	if len(indexes) == 0 {
+		indexes = make([]int, len(paths))
+	}
+	path, paths := paths[0], paths[1:]
+	index, indexes := indexes[0], indexes[1:]
+	if len(element.Childs[path]) > 0 {
+		if len(paths) == 0 {
+			if attr == "" {
+				return element.Childs[path][index].InnerText
+			}
+			return element.Childs[path][index].Attrs[attr]
+		}
+		return element.Childs[path][index].GetValue(paths, indexes, attr)
+	}
+	return ""
+}
+
 func (x *XMLParser) parse() {
 
 	defer close(x.resultChannel)

xmlparser_test.go

@@ -232,6 +232,38 @@ func TestError(t *testing.T) {
 
 }
 
+func TestGetField(t *testing.T) {
+	var found string
+	p := getparser("examples")
+	for xml := range p.Stream() {
+		found = xml.GetValue([]string{"tag1", "tag11"}, []int{}, "")
+		if found != "InnerText110" {
+			t.Errorf("tag1>tag11 doesn´t match with expected \n\t Expected: %s \n\t Found: %s", "InnerText110", found)
+		}
+		found = xml.GetValue([]string{"tag1", "tag11"}, []int{0, 1}, "")
+		if found != "InnerText111" {
+			t.Errorf("tag1>tag11 doesn´t match with expected \n\t Expected: %s \n\t Found: %s", "InnerText111", found)
+		}
+		found = xml.GetValue([]string{"tag1", "tag11"}, []int{1, 0}, "")
+		if found != "InnerText2" {
+			t.Errorf("tag1>tag11 doesn´t match with expected \n\t Expected: %s \n\t Found: %s", "InnerText2", found)
+		}
+		found = xml.GetValue([]string{"tag1", "tag12"}, []int{1, 0}, "att1")
+		if found != "att1" {
+			t.Errorf("tag1>tag12>@att1 doesn´t match with expected \n\t Expected: %s \n\t Found: %s", "att1", found)
+		}
+		found = xml.GetValue([]string{"missingtag", "tag12", "tag13"}, []int{0, 0, 0}, "")
+		if found != "" {
+			t.Errorf("missingtag>tag12>tag13 doesn´t match with expected \n\t Expected: %s \n\t Found: %s", "att1", found)
+		}
+		found = xml.GetValue([]string{"tag1", "tag12", "missingtag"}, []int{1, 0, 0}, "att1")
+		if found != "" {
+			t.Errorf("tag1>tag12>missingtag>@att1 doesn´t match with expected \n\t Expected: %s \n\t Found: %s", "att1", found)
+		}
+	}
+
+}
+
 func Benchmark1(b *testing.B) {
 
 	for n := 0; n < b.N; n++ {