com.totango.discoveryagent.gson.ValueDeserializer.java Source code

Introduction

Here is the source code for com.totango.discoveryagent.gson.ValueDeserializer.java

Source

/**
 *
 * Copyright (C) 2015 Totango , Inc.
 *
 * Licensed 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 com.totango.discoveryagent.gson;

import java.lang.reflect.Type;
import java.nio.charset.Charset;
import java.util.Optional;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.totango.discoveryagent.model.Value;

public class ValueDeserializer implements JsonDeserializer<Value> {

    @Override
    public Value deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {

        JsonObject jsonObj = (JsonObject) json;

        int createIndex = jsonObj.get("CreateIndex").getAsInt();
        int modifyIndex = jsonObj.get("ModifyIndex").getAsInt();
        int lockIndex = jsonObj.get("LockIndex").getAsInt();
        String key = jsonObj.get("Key").getAsString();
        int flags = jsonObj.get("Flags").getAsInt();
        JsonElement sessionJsonElement = jsonObj.get("Session");

        JsonElement valueJsonElement = jsonObj.get("Value");
        Optional<byte[]> value;
        if (valueJsonElement.isJsonNull()) {
            value = Optional.empty();
        } else {
            value = Optional.of(jsonObj.get("Value").getAsString().getBytes(Charset.forName("UTF-8")));
        }

        Optional<String> session = Optional.ofNullable(sessionJsonElement).map(element -> element.getAsString());

        return new Value(key, value, createIndex, modifyIndex, lockIndex, flags, session);
    }
}