com.balajeetm.mystique.core.NowFunction.java Source code

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Here is the source code for com.balajeetm.mystique.core.NowFunction.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 25 Aug, 2016 by balajeetm
 * http://www.balajeetm.com
 */
package com.balajeetm.mystique.core;

import java.util.Date;

import com.balajeetm.mystique.core.util.MystiqueConstants;
import com.balajeetm.mystique.util.gson.lever.JsonLever;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

/**
 * The Class NowFunction.
 *
 * @author balajeetm
 */
public class NowFunction implements MystiqueFunction {

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

    /**
     * Gets the single instance of NowFunction.
     *
     * @return single instance of NowFunction
     */
    public static NowFunction getInstance() {
        return Creator.INSTANCE;
    }

    // Efficient Thread safe Lazy Initialization
    // works only if the singleton constructor is non parameterized
    /** The Class Creator. */
    private static class Creator {

        /** The instance. */
        private static NowFunction INSTANCE = new NowFunction();
    }

    /** Instantiates a new now function. */
    private NowFunction() {
        jsonLever = JsonLever.getInstance();
    }

    /* (non-Javadoc)
     * @see com.futuresight.util.mystique.MystFunction#execute(com.google.gson.JsonElement, com.google.gson.JsonObject)
     */
    @Override
    public JsonElement execute(JsonElement source, JsonObject turn) {
        turn = jsonLever.asJsonObject(turn, new JsonObject());
        String outFormat = jsonLever.asString(turn.get(MystiqueConstants.OUTFORMAT), MystiqueConstants.LONG);
        return TransformFunction.getInstance().getFormattedDate(new Date(), outFormat);
    }
}