nested Config support

config.go

@@ -26,6 +26,12 @@ func newConfig() *Config {
 	return result
 }
 
+func newConfigFromValue(v map[string]interface{}) *Config {
+	result := new(Config)
+	result.data = v
+	return result
+}
+
 // Loads config information from a JSON file
 func LoadConfig(filename string) *Config {
 	result := newConfig()
@@ -126,3 +132,12 @@ func (c *Config) GetArray(key string) []interface{} {
 	}
 	return result.([]interface{})
 }
+
+// Returns an object value as Config
+func (c *Config) GetConfig(key string) *Config {
+	v, exists := c.data[key]
+	if !exists {
+		return nil
+	}
+	return newConfigFromValue(v.(map[string]interface{}))
+}

config_test.go

@@ -55,3 +55,20 @@ func TestConfigMerge(t *testing.T) {
 		t.Errorf("expected vier, got %s:", c.GetString("four"))
 	}
 }
+
+func TestGetConfig(t *testing.T) {
+	c := LoadConfigString(`{"one":{"two":1,"three":"zwei"}}`)
+	if c == nil {
+		t.Fatalf("expected a config object")
+	}
+	subc := c.GetConfig("one")
+	if subc == nil {
+		t.Fatalf("expected sub-config object")
+	}
+	if subc.GetInt("two") != 1 {
+		t.Fatalf("expected int in sub-config")
+	}
+	if subc.GetString("three") != "zwei" {
+		t.Fatalf("expected string in sub-config")
+	}
+}