规则引擎

pkg/rule_engine/nodes/metadata.go

@@ -0,0 +1,62 @@
+package nodes
+
+import (
+	"fmt"
+	"github.com/XM-GO/PandaKit/utils"
+)
+
+const (
+	NODE_CONFIG_MESSAGE_TYPE_KEY    = "messageTypeKey"
+	NODE_CONFIG_ORIGINATOR_TYPE_KEY = "originatorTypeKey"
+)
+
+type Metadata interface {
+	Keys() []string
+	With(key string, val interface{}) Metadata
+	Value(key string) (interface{}, error)
+	DecodePath(rawVal interface{}) error
+}
+
+type nodeMetadata struct {
+	keypairs map[string]interface{}
+}
+
+func NewMetadata() Metadata {
+	return &nodeMetadata{
+		keypairs: make(map[string]interface{}),
+	}
+}
+
+func NewMetadataWithString(vals string) Metadata {
+	return &nodeMetadata{}
+}
+
+func NewMetadataWithValues(vals map[string]interface{}) Metadata {
+	return &nodeMetadata{
+		keypairs: vals,
+	}
+}
+
+func (c *nodeMetadata) Keys() []string {
+	keys := []string{}
+	for key, _ := range c.keypairs {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
+func (c *nodeMetadata) Value(key string) (interface{}, error) {
+	if val, found := c.keypairs[key]; found {
+		return val, nil
+	}
+	return nil, fmt.Errorf("key '%s' not found", key)
+}
+
+func (c *nodeMetadata) With(key string, val interface{}) Metadata {
+	c.keypairs[key] = val
+	return c
+}
+
+func (c *nodeMetadata) DecodePath(rawVal interface{}) error {
+	return utils.Map2Struct(c.keypairs, rawVal)
+}