// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you 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.

#include "protobuf_map.h"

#include <stdio.h>

namespace json2pb {

using google::protobuf::Descriptor;

using google::protobuf::FieldDescriptor;

bool IsProtobufMap(const FieldDescriptor* field) {

    if (field->type() != FieldDescriptor::TYPE_MESSAGE || !field->is_repeated()) {

        return false;

    }

    const Descriptor* entry_desc = field->message_type();

    if (entry_desc == NULL) {

        return false;

    }

    if (entry_desc->field_count() != 2) {

        return false;

    }

    const FieldDescriptor* key_desc = entry_desc->field(KEY_INDEX);

    if (NULL == key_desc

        || key_desc->is_repeated()

        || key_desc->cpp_type() != FieldDescriptor::CPPTYPE_STRING

        || key_desc->name() != KEY_NAME) {

        return false;

    }

    const FieldDescriptor* value_desc = entry_desc->field(VALUE_INDEX);

    if (NULL == value_desc

        || value_desc->name() != VALUE_NAME) {

        return false;

    }

    return true;

}

} // namespace json2pb