| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build java android |
| |
| package nosql |
| |
| import ( |
| "fmt" |
| "runtime" |
| |
| "v.io/v23/syncbase/nosql" |
| |
| jutil "v.io/x/jni/util" |
| ) |
| |
| // GoUpgrader converts a provided Java SchemaUpgrader into a Go SchemaUpgrader. |
| func GoUpgrader(env jutil.Env, jUpgrader jutil.Object) nosql.SchemaUpgrader { |
| if jUpgrader.IsNull() { |
| return nil |
| } |
| // Reference Java upgrader; it will be de-referenced when the Go upgrader |
| // created below is garbage-collected (through the finalizer callback we |
| // setup just below). |
| jUpgrader = jutil.NewGlobalRef(env, jUpgrader) |
| upgrader := &jniUpgrader{ |
| jUpgrader: jUpgrader, |
| } |
| runtime.SetFinalizer(upgrader, func(u *jniUpgrader) { |
| env, freeFunc := jutil.GetEnv() |
| defer freeFunc() |
| jutil.DeleteGlobalRef(env, u.jUpgrader) |
| }) |
| return upgrader |
| } |
| |
| type jniUpgrader struct { |
| jUpgrader jutil.Object |
| } |
| |
| func (u *jniUpgrader) Run(db nosql.Database, oldVersion, newVersion int32) error { |
| env, freeFunc := jutil.GetEnv() |
| defer freeFunc() |
| jdb, ok := db.(*jniDatabase) |
| if !ok { |
| return fmt.Errorf("Unknown database type: %T", db) |
| } |
| jDatabase, err := javaDatabase(env, jdb) |
| if err != nil { |
| return err |
| } |
| databaseSign := jutil.ClassSign("io.v.v23.syncbase.nosql.Database") |
| return jutil.CallVoidMethod(env, u.jUpgrader, "run", []jutil.Sign{databaseSign, jutil.IntSign, jutil.IntSign}, jDatabase, oldVersion, newVersion) |
| } |