com.skysql.manager.DateConversion.java Source code

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Here is the source code for com.skysql.manager.DateConversion.java

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/*
 * This file is distributed as part of the MariaDB Manager.  It is free
 * software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation,
 * version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright 2012-2014 SkySQL Corporation Ab
 */

package com.skysql.manager;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.SimpleTimeZone;
import java.util.TimeZone;

import com.skysql.java.Logging;
import com.vaadin.server.WebBrowser;
import com.vaadin.ui.UI;

/**
 * The Class DateConversion. Converts date received from API into local time zone and custom format.
 */
public class DateConversion {
    public static String DEFAULT_INPUT_FORMAT = "E, d MMM y HH:mm:ss Z"; // as currently returned by the API: Mon, 02 Sep 2013 13:08:14 +0000
    public static String DEFAULT_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";

    private boolean adjust = false;
    private String format = DEFAULT_TIME_FORMAT;
    private String clientTZname;
    private SimpleTimeZone clientTimeZone;

    /**
     * Instantiates a new date conversion.
     *
     * @param adjust adjust to local tz or not
     * @param format the output format
     */
    public DateConversion(boolean adjust, String format) {
        this.adjust = adjust;
        this.format = (format == null ? DEFAULT_TIME_FORMAT : format);

        WebBrowser webBrowser = UI.getCurrent().getPage().getWebBrowser();
        int browserOffset = webBrowser.getRawTimezoneOffset();
        clientTimeZone = new SimpleTimeZone(browserOffset, "Client time zone");
        clientTZname = clientTimeZone.getDisplayName();
    }

    /**
     * Gets the client tz name.
     *
     * @return the client tz name
     */
    public String getClientTZname() {
        return clientTZname;
    }

    /**
     * Checks if is adjusted to local TZ.
     *
     * @return true, if is adjusted to local
     */
    public boolean isAdjustedToLocal() {
        return adjust;
    }

    /**
     * Sets the adjusted to local.
     *
     * @param adjust the new adjusted to local
     */
    public void setAdjustedToLocal(boolean adjust) {
        this.adjust = adjust;
    }

    /**
     * Gets the output date format.
     *
     * @return the format
     */
    public String getFormat() {
        return format;
    }

    /**
     * Sets the output date format.
     *
     * @param format the new format
     */
    public void setFormat(String format) {
        this.format = format;
    }

    /**
     * Adjust the input date to local tz (or not) and apply custom format.
     *
     * @param timestamp the timestamp
     * @return the string
     */
    public String adjust(String timestamp) {
        if (timestamp == null || timestamp.isEmpty()) {
            return timestamp;
        } else {
            String adjusted = null;
            SimpleDateFormat sdfInput = new SimpleDateFormat(DEFAULT_INPUT_FORMAT);
            try {
                SimpleDateFormat sdfOutput = new SimpleDateFormat(format);
                Date myDate = sdfInput.parse(timestamp);
                if (adjust) {
                    sdfOutput.setTimeZone(clientTimeZone);
                } else {
                    sdfOutput.setTimeZone(TimeZone.getTimeZone("GMT"));
                }
                adjusted = sdfOutput.format(myDate);
            } catch (Exception e) {
                ManagerUI.error("Exception parsing timestamp: " + timestamp + " with format: " + format);
                ManagerUI.error(e.getMessage());
                adjusted = "Format Error";
            }
            return adjusted;
        }
    }

    /**
     * Stamp to string.
     *
     * @param timestamp the timestamp
     * @return the string
     */
    public String stampToString(Long timestamp) {

        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(timestamp * 1000L);
        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
        if (!adjust) {
            sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
        }
        String timeString = sdf.format(cal.getTime());

        return timeString;
    }

}