com.microsoft.graph.serializer.EnumSetSerializer Maven / Gradle / Ivy

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// Copyright (c) 2017 Microsoft Corporation
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package com.microsoft.graph.serializer;

import com.google.gson.Gson;
import com.google.gson.JsonPrimitive;

import java.lang.reflect.Type;
import java.util.EnumSet;
import java.util.Iterator;

/**
 * Serializes and deserializes EnumSets
 * The Graph service expects a single enum value as a comma-delimited string
 * Here, we flatten the EnumSet to serialize the object
 * and insert the response into an array to deserialize back to an EnumSet
 */
public class EnumSetSerializer {

    /**
     * Not available for instantiation
     */
    private EnumSetSerializer() {
    }

    /**
     * Deserializes a comma-delimited string of enum values
     * 
     * @param type                 the type
     * @param jsonStrToDeserialize the string to deserialize
     * @return                     EnumSet of values
     */
    public static EnumSet deserialize(Type type, String jsonStrToDeserialize) {
            Gson gson = new Gson();
            String arrayString = "[" + jsonStrToDeserialize + "]";
            return jsonStrToDeserialize == null ? null : (EnumSet) gson.fromJson(arrayString, type);
    }

    /**
     * Serializes an EnumSet into a comma-delimited string
     * 
     * @param src the source EnumSet
     * @return    a comma-delimited string of enum values
     */
    public static JsonPrimitive serialize(EnumSet src) {
        String serializedString = "";

        Iterator i = src.iterator();
        while (i.hasNext()) {
            serializedString += i.next().toString() + ",";
        }
        serializedString = serializedString.substring(0, serializedString.length()-1);
        return new JsonPrimitive(serializedString);
    }
}