TAPI based RESTCONF not work

[hrk091]

I've tried to implement TAPI RESTCONF NBI using TAPI model(onos/models/tapi) using DynamicConfigurationSubsystem. With the help of l3vpn and openroadm sample app, I made sample code below:

package org.onosproject.tapi.service;

import com.google.common.collect.ImmutableMap;
import org.apache.felix.scr.annotations.Component;
import org.onosproject.yang.AbstractYangModelRegistrator;
import org.onosproject.yang.gen.v1.tapicommon.rev20170531.TapiCommon;
import org.onosproject.yang.gen.v1.tapiconnectivity.rev20170531.TapiConnectivity;
import org.onosproject.yang.gen.v1.tapipathcomputation.rev20170531.TapiPathComputation;
import org.onosproject.yang.gen.v1.tapitopology.rev20170531.TapiTopology;
import org.onosproject.yang.model.DefaultYangModuleId;
import org.onosproject.yang.model.YangModuleId;
import org.onosproject.yang.runtime.AppModuleInfo;
import org.onosproject.yang.runtime.DefaultAppModuleInfo;

import java.util.HashMap;
import java.util.Map;

/**
 * Component to register the OpenConfig service model and its dependencies.
 */
@Component(immediate = true)
public class TapiServiceModelRegistrator extends AbstractYangModelRegistrator {
    public TapiServiceModelRegistrator() {
        super(TapiConnectivity.class, getAppInfo());
    }

    private static Map<YangModuleId, AppModuleInfo> getAppInfo() {
        Map<YangModuleId, AppModuleInfo> appInfo = new HashMap<>();

        appInfo.put(new DefaultYangModuleId("tapi-connectivity", "2017-05-31"),
                    new DefaultAppModuleInfo(TapiConnectivity.class, null));

        // Dependencies for tapi-connectivity
        appInfo.put(new DefaultYangModuleId("tapi-common", "2017-05-31"),
                    new DefaultAppModuleInfo(TapiCommon.class, null));
        appInfo.put(new DefaultYangModuleId("tapi-topology", "2017-05-31"),
                    new DefaultAppModuleInfo(TapiTopology.class, null));
        appInfo.put(new DefaultYangModuleId("tapi-path-computation", "2017-05-31"),
                    new DefaultAppModuleInfo(TapiPathComputation.class, null));
        

        return ImmutableMap.copyOf(appInfo);
    }
}

But it didn't work correctly. When I tried to post

{
  "tapi-common:context": {
  	"service-interface-point": []
  }
}

to RESTCONF API, it returned 500 Internal Server Error, and the following error are shown in onos log:

2018-01-16 17:30:18,138 | ERROR | qtp1273768067-39 | RestconfUtils                    | 175 - org.onosproject.onos-apps-restconf-utils - 1.13.0.SNAPSHOT | convertJsonToDataN
ode failure: Method called for other then data node
2018-01-16 17:30:18,138 | ERROR | qtp1273768067-39 | RestconfWebResource              | 177 - org.onosproject.onos-protocols-restconf-server-rpp - 1.13.0.SNAPSHOT | ERROR: h
andlePostRequest: ERROR: JSON cannot be converted to DataNode

Namespace and JSON schema may be correct, because when I tried another config which has wrong namespace or JSON schema RESTCONF API returned different messages( and they indicated right error cause).
I've created OpenConfig RESTCONF API in a same way using DynamicConfigSubsystem, it works fine. So this issue might be unique to TAPI model, I guess.