alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

JMeter example source code file (JDateField.java)

This example JMeter source code file (JDateField.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - JMeter tags/keywords

awt, calendar, d, date, date, event, focusclass, gui, jdatefield, keyfocus, keyfocus, m, m, parseexception, string, swing, text, util, y, y

The JMeter JDateField.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.jmeter.gui.util;

import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import javax.swing.JTextField;

/**
 * This is Date mask control. Using this control we can pop up our date in the
 * text field. And this control is Devloped basically for JDK1.3 and lower
 * version support. This control is similer to JSpinner control this is
 * available in JDK1.4 and above only.
 * <p>
 * This will set the date "yyyy/MM/dd HH:mm:ss" in this format only.
 * </p>
 *
 */
public class JDateField extends JTextField {

    private static final long serialVersionUID = 240L;

    // Datefields are not thread-safe
    private final DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"); // $NON-NLS-1$

    /*
     * The following array must agree with dateFormat
     *
     * It is used to translate the positions in the buffer to the values used by
     * the Calendar class for the field id.
     *
     * Current format: MM/DD/YYYY HH:MM:SS 01234567890123456789 ^buffer
     * positions
     */
    private static final int fieldPositions[] = {
            Calendar.YEAR, // Y
            Calendar.YEAR, // Y
            Calendar.YEAR, // Y
            Calendar.YEAR, // Y
            Calendar.YEAR, // sp
            Calendar.MONTH, // M
            Calendar.MONTH, // M
            Calendar.MONTH, // /
            Calendar.DAY_OF_MONTH, // D
            Calendar.DAY_OF_MONTH, // D
            Calendar.DAY_OF_MONTH, // /
            Calendar.HOUR_OF_DAY, // H
            Calendar.HOUR_OF_DAY, // H
            Calendar.HOUR_OF_DAY, // :
            Calendar.MINUTE, // M
            Calendar.MINUTE, // M
            Calendar.MINUTE, // :
            Calendar.SECOND, // S
            Calendar.SECOND, // S
            Calendar.SECOND // end
    };

    /**
     * Create a DateField with the specified date.
     */
    public JDateField(Date date) {
        super(20);
        this.addKeyListener(new KeyFocus());
        this.addFocusListener(new FocusClass());
        String myString = dateFormat.format(date);
        setText(myString);
    }

    // Dummy constructor to allo JUnit tests to work
    public JDateField() {
        this(new Date());
    }

    /**
     * Set the date to the Date mask control.
     */
    public void setDate(Date date) {
        setText(dateFormat.format(date));
    }

    /**
     * Get the date from the Date mask control.
     */
    public Date getDate() {
        try {
            return dateFormat.parse(getText());
        } catch (ParseException e) {
            return new Date();
        } catch (Exception e) {
            // DateFormat.parse has some bugs (up to JDK 1.4.2) by which it
            // throws unchecked exceptions. E.g. see:
            // http://developer.java.sun.com/developer/bugParade/bugs/4699765.html
            //
            // To avoid problems with such situations, we'll catch all
            // exceptions here and act just as for ParseException above:
            return new Date();
        }
    }

    /*
     * Convert position in buffer to Calendar type Assumes that pos >=0 (which
     * is true for getCaretPosition())
     */
    private static int posToField(int pos) {
        if (pos >= fieldPositions.length) { // if beyond the end
            pos = fieldPositions.length - 1; // then set to the end
        }
        return fieldPositions[pos];
    }

    /**
     * Converts a date/time to a calendar using the defined format
     */
    private Calendar parseDate(String datetime) {
        Calendar c = Calendar.getInstance();
        try {
            Date dat = dateFormat.parse(datetime);
            c.setTime(dat);
        } catch (ParseException e) {
            // Do nothing; the current time will be returned
        }
        return c;
    }

    /*
     * Update the current field. The addend is only expected to be +1/-1, but
     * other values will work. N.B. the roll() method only supports changes by a
     * single unit - up or down
     */
    private void update(int addend, boolean shifted) {
        Calendar c = parseDate(getText());
        int pos = getCaretPosition();
        int field = posToField(pos);
        if (shifted) {
            c.roll(field, true);
        } else {
            c.add(field, addend);
        }
        String newDate = dateFormat.format(c.getTime());
        setText(newDate);
        if (pos > newDate.length()) {
            pos = newDate.length();
        }
        setCaretPosition(pos);// Restore position

    }

    class KeyFocus extends KeyAdapter {
        KeyFocus() {
        }

        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_UP) {
                update(1, e.isShiftDown());
            } else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
                update(-1, e.isShiftDown());
            }
        }
    }

    class FocusClass implements FocusListener {
        FocusClass() {
        }

        public void focusGained(FocusEvent e) {
        }

        public void focusLost(FocusEvent e) {
            try {
                dateFormat.parse(getText());
            } catch (ParseException e1) {
                requestFocus();
            }
        }
    }
}

Other JMeter examples (source code examples)

Here is a short list of links related to this JMeter JDateField.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.