You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.0 KiB
81 lines
2.0 KiB
9 years ago
|
// Copyright 2014 The Cayley Authors. All rights reserved.
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package gremlin
|
||
|
|
|
||
|
|
// Adds special traversal functions to JS Gremlin objects. Most of these just build the chain of objects, and won't often need the session.
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/barakmich/glog"
|
||
|
|
"github.com/robertkrimen/otto"
|
||
|
|
)
|
||
|
|
|
||
|
|
var traversals = []string{
|
||
|
|
"In",
|
||
|
|
"Out",
|
||
|
|
"Is",
|
||
|
|
"Both",
|
||
|
|
"Follow",
|
||
|
|
"FollowR",
|
||
|
|
"And",
|
||
|
|
"Intersect",
|
||
|
|
"Union",
|
||
|
|
"Or",
|
||
|
|
"Back",
|
||
|
|
"Tag",
|
||
|
|
"As",
|
||
|
|
"Has",
|
||
|
|
"Save",
|
||
|
|
"SaveR",
|
||
|
|
"Except",
|
||
|
|
"Difference",
|
||
|
|
"InPredicates",
|
||
|
|
"OutPredicates",
|
||
|
|
}
|
||
|
|
|
||
|
|
func (wk *worker) embedTraversals(env *otto.Otto, obj *otto.Object) {
|
||
|
|
for _, t := range traversals {
|
||
|
|
obj.Set(t, wk.gremlinFunc(t, obj, env))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (wk *worker) gremlinFunc(kind string, prev *otto.Object, env *otto.Otto) func(otto.FunctionCall) otto.Value {
|
||
|
|
return func(call otto.FunctionCall) otto.Value {
|
||
|
|
call.Otto.Run("var out = {}")
|
||
|
|
out, _ := call.Otto.Object("out")
|
||
|
|
out.Set("_gremlin_type", kind)
|
||
|
|
out.Set("_gremlin_values", call.ArgumentList)
|
||
|
|
out.Set("_gremlin_prev", prev)
|
||
|
|
args := argsOf(call)
|
||
|
|
if len(args) > 0 {
|
||
|
|
out.Set("string_args", args)
|
||
|
|
}
|
||
|
|
wk.embedTraversals(env, out)
|
||
|
|
if isVertexChain(call.This.Object()) {
|
||
|
|
wk.embedFinals(env, out)
|
||
|
|
}
|
||
|
|
return out.Value()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func debugChain(obj *otto.Object) bool {
|
||
|
|
val, _ := obj.Get("_gremlin_type")
|
||
|
|
glog.V(2).Infoln(val)
|
||
|
|
val, _ = obj.Get("_gremlin_prev")
|
||
|
|
if val.IsObject() {
|
||
|
|
return debugChain(val.Object())
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|