/*
 * 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.
 */
package org.apache.nifi.snmp.utils;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.snmp4j.security.UsmUser;

import java.util.List;

public class UsmJsonParser {

    private UsmJsonParser() {
        // Utility class, not to instantiate.
    }

    private static final ObjectMapper MAPPER;
    private static final SimpleModule MODULE;

    static {
        MAPPER = new ObjectMapper();
        MODULE = new SimpleModule();
        MODULE.addDeserializer(UsmUser.class, new UsmUserDeserializer());
        MAPPER.registerModule(MODULE);
    }

    static List<UsmUser> parse(final String json) throws JsonProcessingException {
        return MAPPER.readValue(json, new TypeReference<List<UsmUser>>() {
        });
    }
}
