Golang util.Ref函数代码示例

//export Java_io_v_v23_context_VContext_nativeFinalize
func Java_io_v_v23_context_VContext_nativeFinalize(jenv *C.JNIEnv, jVContext C.jobject, goRef C.jlong, goCancelRef C.jlong) {
	jutil.GoDecRef(jutil.Ref(goRef))
	if jutil.Ref(goCancelRef) != jutil.NullRef {
		jutil.GoDecRef(jutil.Ref(goCancelRef))
	}

}

func (d *dispatcher) Lookup(ctx *context.T, suffix string) (interface{}, security.Authorizer, error) {
	// Get Java environment.
	env, freeFunc := jutil.GetEnv()
	defer freeFunc()

	result, err := jutil.CallStaticLongArrayMethod(env, jServerRPCHelperClass, "lookup", []jutil.Sign{dispatcherSign, jutil.StringSign}, d.jDispatcher, suffix)
	if err != nil {
		return nil, nil, fmt.Errorf("error invoking Java dispatcher's lookup() method: %v", err)
	}
	if result == nil {
		// Lookup returned null, which means that the dispatcher isn't handling the object -
		// this is not an error.
		return nil, nil, nil
	}
	if len(result) != 2 {
		return nil, nil, fmt.Errorf("lookup returned %d elems, want 2", len(result))
	}
	invoker := *(*rpc.Invoker)(jutil.GoRefValue(jutil.Ref(result[0])))
	jutil.GoDecRef(jutil.Ref(result[0]))
	authorizer := security.Authorizer(nil)
	if result[1] != 0 {
		authorizer = *(*security.Authorizer)(jutil.GoRefValue(jutil.Ref(result[1])))
		jutil.GoDecRef(jutil.Ref(result[1]))
	}
	return invoker, authorizer, nil
}

//export Java_io_v_v23_security_VPrincipalImpl_nativeBless
func Java_io_v_v23_security_VPrincipalImpl_nativeBless(jenv *C.JNIEnv, jVPrincipalImpl C.jobject, goRef C.jlong, jKey C.jobject, jWith C.jobject, jExtension C.jstring, jCaveat C.jobject, jAdditionalCaveats C.jobjectArray) C.jobject {
	env := jutil.Env(uintptr(unsafe.Pointer(jenv)))
	key, err := GoPublicKey(env, jutil.Object(uintptr(unsafe.Pointer(jKey))))
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	with, err := GoBlessings(env, jutil.Object(uintptr(unsafe.Pointer(jWith))))
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	extension := jutil.GoString(env, jutil.Object(uintptr(unsafe.Pointer(jExtension))))
	caveat, err := GoCaveat(env, jutil.Object(uintptr(unsafe.Pointer(jCaveat))))
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	additionalCaveats, err := GoCaveats(env, jutil.Object(uintptr(unsafe.Pointer(jAdditionalCaveats))))
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	blessings, err := (*(*security.Principal)(jutil.GoRefValue(jutil.Ref(goRef)))).Bless(key, with, extension, caveat, additionalCaveats...)
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	jBlessings, err := JavaBlessings(env, blessings)
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	return C.jobject(unsafe.Pointer(jBlessings))
}

//export Java_io_v_impl_google_lib_discovery_UpdateImpl_nativeAttachment
func Java_io_v_impl_google_lib_discovery_UpdateImpl_nativeAttachment(jenv *C.JNIEnv, _ C.jobject, goRef C.jlong, jCtx C.jobject, jName C.jstring, jCbObj C.jobject) {
	env := jutil.Env(uintptr(unsafe.Pointer(jenv)))
	ctx, _, err := jcontext.GoContext(env, jutil.Object(uintptr(unsafe.Pointer(jCtx))))
	if err != nil {
		jutil.JThrowV(env, err)
		return
	}

	update := *(*discovery.Update)(jutil.GoRefValue(jutil.Ref(goRef)))
	name := jutil.GoString(env, jutil.Object(uintptr(unsafe.Pointer(jName))))

	jCb := jutil.Object(uintptr(unsafe.Pointer(jCbObj)))
	jutil.DoAsyncCall(env, jCb, func() (jutil.Object, error) {
		dataOrErr := <-update.Attachment(ctx, name)
		if dataOrErr.Error != nil {
			return jutil.NullObject, err
		}

		env, freeFunc := jutil.GetEnv()
		defer freeFunc()

		jData, err := jutil.JByteArray(env, dataOrErr.Data)
		if err != nil {
			return jutil.NullObject, err
		}
		// Must grab a global reference as we free up the env and all local references that come
		// along with it.
		return jutil.NewGlobalRef(env, jData), nil // Un-refed in DoAsyncCall
	})
}

// GoAuthorizer converts the given Java authorizer into a Go authorizer.
func GoAuthorizer(env jutil.Env, jAuth jutil.Object) (security.Authorizer, error) {
	if jAuth.IsNull() {
		return nil, nil
	}
	if jutil.IsInstanceOf(env, jAuth, jPermissionsAuthorizerClass) {
		// Called with our implementation of Authorizer, which maintains a Go reference - use it.
		ref, err := jutil.JLongField(env, jAuth, "nativeRef")
		if err != nil {
			return nil, err
		}
		return *(*security.Authorizer)(jutil.GoRefValue(jutil.Ref(ref))), nil
	}
	// Reference Java dispatcher; it will be de-referenced when the go
	// dispatcher created below is garbage-collected (through the finalizer
	// callback we setup below).
	jAuth = jutil.NewGlobalRef(env, jAuth)
	a := &authorizer{
		jAuth: jAuth,
	}
	runtime.SetFinalizer(a, func(a *authorizer) {
		env, freeFunc := jutil.GetEnv()
		defer freeFunc()
		jutil.DeleteGlobalRef(env, a.jAuth)
	})
	return a, nil
}

// GoCall creates instance of security.Call that uses the provided Java
// Call as its underlying implementation.
func GoCall(env jutil.Env, jCall jutil.Object) (security.Call, error) {
	if jCall.IsNull() {
		return nil, nil
	}
	if jutil.IsInstanceOf(env, jCall, jCallImplClass) {
		// Called with our implementation of Call, which maintains a Go reference - use it.
		ref, err := jutil.CallLongMethod(env, jCall, "nativeRef", nil)
		if err != nil {
			return nil, err
		}
		return (*(*security.Call)(jutil.GoRefValue(jutil.Ref(ref)))), nil
	}
	// Reference Java call; it will be de-referenced when the go call
	// created below is garbage-collected (through the finalizer callback we
	// setup just below).
	jCall = jutil.NewGlobalRef(env, jCall)
	call := &callImpl{
		jCall: jCall,
	}
	runtime.SetFinalizer(call, func(c *callImpl) {
		env, freeFunc := jutil.GetEnv()
		defer freeFunc()
		jutil.DeleteGlobalRef(env, c.jCall)
	})
	return call, nil
}

// GoBlessingStore creates an instance of security.BlessingStore that uses the
// provided Java BlessingStore as its underlying implementation.
func GoBlessingStore(env jutil.Env, jBlessingStore jutil.Object) (security.BlessingStore, error) {
	if jBlessingStore.IsNull() {
		return nil, nil
	}
	if jutil.IsInstanceOf(env, jBlessingStore, jBlessingStoreImplClass) {
		// Called with our implementation of BlessingStore, which maintains a Go reference - use it.
		ref, err := jutil.JLongField(env, jBlessingStore, "nativeRef")
		if err != nil {
			return nil, err
		}
		return (*(*security.BlessingStore)(jutil.GoRefValue(jutil.Ref(ref)))), nil
	}
	// Reference Java BlessingStore; it will be de-referenced when the Go
	// BlessingStore created below is garbage-collected (through the finalizer
	// callback we setup just below).
	jBlessingStore = jutil.NewGlobalRef(env, jBlessingStore)
	s := &blessingStore{
		jBlessingStore: jBlessingStore,
	}
	runtime.SetFinalizer(s, func(s *blessingStore) {
		env, freeFunc := jutil.GetEnv()
		defer freeFunc()
		jutil.DeleteGlobalRef(env, s.jBlessingStore)
	})
	return s, nil
}

//export Java_io_v_impl_google_rpc_StreamImpl_nativeRecv
func Java_io_v_impl_google_rpc_StreamImpl_nativeRecv(jenv *C.JNIEnv, jStream C.jobject, goRef C.jlong, jCallbackObj C.jobject) {
	env := jutil.Env(uintptr(unsafe.Pointer(jenv)))
	jCallback := jutil.Object(uintptr(unsafe.Pointer(jCallbackObj)))
	result := new(vdl.Value)
	jutil.DoAsyncCall(env, jCallback, func() (jutil.Object, error) {
		if err := (*(*rpc.Stream)(jutil.GoRefValue(jutil.Ref(goRef)))).Recv(&result); err != nil {
			if err == io.EOF {
				// Java uses EndOfFile error to detect EOF.
				err = verror.NewErrEndOfFile(nil)
			}
			return jutil.NullObject, err
		}
		vomResult, err := vom.Encode(result)
		if err != nil {
			return jutil.NullObject, err
		}
		env, freeFunc := jutil.GetEnv()
		defer freeFunc()
		jResult, err := jutil.JByteArray(env, vomResult)
		if err != nil {
			return jutil.NullObject, err
		}
		// Must grab a global reference as we free up the env and all local references that come along
		// with it.
		return jutil.NewGlobalRef(env, jResult), nil // Un-refed in DoAsyncCall
	})
}

//export Java_io_v_v23_security_BlessingPattern_nativeIsValid
func Java_io_v_v23_security_BlessingPattern_nativeIsValid(jenv *C.JNIEnv, jBlessingPattern C.jobject, goRef C.jlong) C.jboolean {
	valid := (*(*security.BlessingPattern)(jutil.GoRefValue(jutil.Ref(goRef)))).IsValid()
	if valid {
		return C.JNI_TRUE
	}
	return C.JNI_FALSE
}

//export Java_io_v_impl_google_rpc_ClientCallImpl_nativeCloseSend
func Java_io_v_impl_google_rpc_ClientCallImpl_nativeCloseSend(jenv *C.JNIEnv, jCall C.jobject, goRef C.jlong, jCallbackObj C.jobject) {
	env := jutil.Env(uintptr(unsafe.Pointer(jenv)))
	jCallback := jutil.Object(uintptr(unsafe.Pointer(jCallbackObj)))
	jutil.DoAsyncCall(env, jCallback, func() (jutil.Object, error) {
		return jutil.NullObject, (*(*rpc.ClientCall)(jutil.GoRefValue(jutil.Ref(goRef)))).CloseSend()
	})
}

//export Java_io_v_v23_security_BlessingRootsImpl_nativeDump
func Java_io_v_v23_security_BlessingRootsImpl_nativeDump(jenv *C.JNIEnv, jBlessingRootsImpl C.jobject, goRef C.jlong) C.jobject {
	env := jutil.Env(uintptr(unsafe.Pointer(jenv)))
	dump := (*(*security.BlessingRoots)(jutil.GoRefValue(jutil.Ref(goRef)))).Dump()
	result := make(map[jutil.Object][]jutil.Object)
	for pattern, keys := range dump {
		jBlessingPattern, err := JavaBlessingPattern(env, pattern)
		if err != nil {
			jutil.JThrowV(env, err)
			return nil
		}
		jPublicKeys := make([]jutil.Object, len(keys))
		for i, key := range keys {
			var err error
			if jPublicKeys[i], err = JavaPublicKey(env, key); err != nil {
				jutil.JThrowV(env, err)
				return nil
			}
		}
		result[jBlessingPattern] = jPublicKeys
	}
	jMap, err := jutil.JObjectMultimap(env, result)
	if err != nil {
		jutil.JThrowV(env, err)
		return nil
	}
	return C.jobject(unsafe.Pointer(jMap))
}

func doFinish(goRef C.jlong, numResults int) (jutil.Object, error) {
	// Have all the results be decoded into *vdl.Value.
	resultPtrs := make([]interface{}, numResults)
	for i := 0; i < numResults; i++ {
		value := new(vdl.Value)
		resultPtrs[i] = &value
	}
	if err := (*(*rpc.ClientCall)(jutil.GoRefValue(jutil.Ref(goRef)))).Finish(resultPtrs...); err != nil {
		// Invocation error.
		return jutil.NullObject, err
	}
	// VOM-encode the results.
	vomResults := make([][]byte, numResults)
	for i, resultPtr := range resultPtrs {
		// Remove the pointer from the result.  Simply *resultPtr doesn't work
		// as resultPtr is of type interface{}.
		result := interface{}(jutil.DerefOrDie(resultPtr))
		var err error
		if vomResults[i], err = vom.Encode(result); err != nil {
			return jutil.NullObject, err
		}
	}
	env, freeFunc := jutil.GetEnv()
	defer freeFunc()
	jArr, err := jutil.JByteArrayArray(env, vomResults)
	if err != nil {
		return jutil.NullObject, err
	}
	// Must grab a global reference as we free up the env and all local references that come along
	// with it.
	return jutil.NewGlobalRef(env, jArr), nil // Un-refed in DoAsyncCall
}

// GoPrincipal converts the provided Java VPrincipal object into a Go Principal.
func GoPrincipal(env jutil.Env, jPrincipal jutil.Object) (security.Principal, error) {
	if jPrincipal.IsNull() {
		return nil, nil
	}
	if jutil.IsInstanceOf(env, jPrincipal, jVPrincipalImplClass) {
		// Called with our implementation of VPrincipal, which maintains a Go reference - use it.
		ref, err := jutil.CallLongMethod(env, jPrincipal, "nativeRef", nil)
		if err != nil {
			return nil, err
		}
		return (*(*security.Principal)(jutil.GoRefValue(jutil.Ref(ref)))), nil
	}

	// Reference Java VPrincipal; it will be de-referenced when the Go Principal
	// created below is garbage-collected (through the finalizer callback we
	// setup just below).
	jPrincipal = jutil.NewGlobalRef(env, jPrincipal)
	// Create Go Principal.
	p := &principal{
		jPrincipal: jPrincipal,
	}
	runtime.SetFinalizer(p, func(p *principal) {
		env, freeFunc := jutil.GetEnv()
		defer freeFunc()
		jutil.DeleteGlobalRef(env, p.jPrincipal)
	})
	return p, nil
}

// GoBlessingRoots creates an instance of security.BlessingRoots that uses the
// provided Java BlessingRoots as its underlying implementation.
func GoBlessingRoots(env jutil.Env, jBlessingRoots jutil.Object) (security.BlessingRoots, error) {
	if jBlessingRoots.IsNull() {
		return nil, nil
	}
	if jutil.IsInstanceOf(env, jBlessingRoots, jBlessingRootsImplClass) {
		// Called with our implementation of BlessingRoots, which maintains a Go reference - use it.
		ref, err := jutil.CallLongMethod(env, jBlessingRoots, "nativeRef", nil)
		if err != nil {
			return nil, err
		}
		return (*(*security.BlessingRoots)(jutil.GoRefValue(jutil.Ref(ref)))), nil
	}
	// Reference Java BlessingRoots; it will be de-referenced when the Go
	// BlessingRoots created below is garbage-collected (through the finalizer
	// callback we setup just below).
	jBlessingRoots = jutil.NewGlobalRef(env, jBlessingRoots)
	r := &blessingRoots{
		jBlessingRoots: jBlessingRoots,
	}
	runtime.SetFinalizer(r, func(r *blessingRoots) {
		env, freeFunc := jutil.GetEnv()
		defer freeFunc()
		jutil.DeleteGlobalRef(env, r.jBlessingRoots)
	})
	return r, nil
}

//export Java_io_v_impl_google_channel_OutputChannelImpl_nativeClose
func Java_io_v_impl_google_channel_OutputChannelImpl_nativeClose(jenv *C.JNIEnv, jOutputChannelClass C.jclass, goCloseRef C.jlong, jCallbackObj C.jobject) {
	env := jutil.Env(uintptr(unsafe.Pointer(jenv)))
	close := *(*func() error)(jutil.GoRefValue(jutil.Ref(goCloseRef)))
	jCallback := jutil.Object(uintptr(unsafe.Pointer(jCallbackObj)))
	jutil.DoAsyncCall(env, jCallback, func() (jutil.Object, error) {
		return jutil.NullObject, close()
	})
}