com.balajeetm.mystique.core.module.GsonSerialiser.java Source code

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Here is the source code for com.balajeetm.mystique.core.module.GsonSerialiser.java

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/*
 * Copyright (c) Balajee TM 2016.
 * All rights reserved.
 * License -  @see <a href="http://www.apache.org/licenses/LICENSE-2.0"></a>
 */

/*
 * Created on 9 Oct, 2016 by balajeetm
 * http://www.balajeetm.com
 */
package com.balajeetm.mystique.core.module;

import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Map.Entry;

import com.balajeetm.mystique.util.gson.lever.JsonLever;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import com.google.gson.internal.LazilyParsedNumber;

/**
 * The Class GsonSerialiser.
 *
 * @author balajeetm
 */
public class GsonSerialiser extends StdSerializer<JsonElement> {

    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;

    /** The json lever. */
    private JsonLever jsonLever;

    /** Instantiates a new gson serialiser. */
    public GsonSerialiser() {
        this(JsonElement.class);
        jsonLever = JsonLever.getInstance();
    }

    /**
     * Instantiates a new gson serialiser.
     *
     * @param t the t
     */
    public GsonSerialiser(Class<JsonElement> t) {
        super(t, true);
    }

    /* (non-Javadoc)
     * @see com.fasterxml.jackson.databind.ser.std.StdSerializer#serialize(java.lang.Object, com.fasterxml.jackson.core.JsonGenerator, com.fasterxml.jackson.databind.SerializerProvider)
     */
    @Override
    public void serialize(JsonElement value, JsonGenerator gen, SerializerProvider provider) throws IOException {
        if (jsonLever.isNull(value)) {
            gen.writeNull();
        } else if (jsonLever.isObject(value)) {
            gen.writeStartObject();
            JsonObject jsonObject = value.getAsJsonObject();
            for (Entry<String, JsonElement> entry : jsonObject.entrySet()) {
                gen.writeFieldName(entry.getKey());
                serialize(entry.getValue(), gen, provider);
            }
            gen.writeEndObject();
        } else if (jsonLever.isArray(value)) {
            gen.writeStartArray();
            JsonArray jsonArray = value.getAsJsonArray();
            for (JsonElement jsonElement : jsonArray) {
                serialize(jsonElement, gen, provider);
            }
            gen.writeEndArray();
        } else if (jsonLever.isPrimitive(value)) {
            JsonPrimitive jsonPrimitive = value.getAsJsonPrimitive();
            if (jsonPrimitive.isBoolean()) {
                gen.writeBoolean(jsonPrimitive.getAsBoolean());
            }
            if (jsonPrimitive.isNumber()) {
                Number nnode = jsonPrimitive.getAsNumber();
                if (nnode instanceof LazilyParsedNumber) {
                    gen.writeNumber(nnode.toString());
                } else if (nnode instanceof Integer) {
                    gen.writeNumber(nnode.intValue());
                } else if (nnode instanceof Short) {
                    gen.writeNumber(nnode.shortValue());
                } else if (nnode instanceof BigInteger || nnode instanceof Long) {
                    gen.writeNumber(nnode.longValue());
                } else if (nnode instanceof Float) {
                    gen.writeNumber(nnode.floatValue());
                } else if (nnode instanceof Double || nnode instanceof BigDecimal) {
                    gen.writeNumber(nnode.doubleValue());
                }
            }
            if (jsonPrimitive.isString()) {
                gen.writeString(jsonPrimitive.getAsString());
            }
        }
    }
}