1 package org.jrobin.core.timespec;
2
3 import org.jrobin.core.RrdException;
4 import org.jrobin.core.Util;
5
6 import javax.swing.*;
7 import java.awt.*;
8 import java.awt.event.ActionEvent;
9 import java.awt.event.ActionListener;
10 import java.text.ParseException;
11 import java.text.SimpleDateFormat;
12 import java.util.Date;
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37 public class Epoch extends JFrame {
38 private static final long serialVersionUID = 1L;
39 private static final String[] supportedFormats = {
40 "MM/dd/yy HH:mm:ss", "dd.MM.yy HH:mm:ss", "yy-MM-dd HH:mm:ss", "MM/dd/yy HH:mm",
41 "dd.MM.yy HH:mm", "yy-MM-dd HH:mm", "MM/dd/yy", "dd.MM.yy", "yy-MM-dd", "HH:mm MM/dd/yy",
42 "HH:mm dd.MM.yy", "HH:mm yy-MM-dd", "HH:mm:ss MM/dd/yy", "HH:mm:ss dd.MM.yy", "HH:mm:ss yy-MM-dd"
43 };
44
45 private static final SimpleDateFormat[] parsers = new SimpleDateFormat[supportedFormats.length];
46 private static final String helpText;
47
48 private Timer timer = new Timer(1000, new ActionListener() {
49 public void actionPerformed(ActionEvent e) {
50 showTimestamp();
51 }
52 });
53
54 static {
55 for (int i = 0; i < parsers.length; i++) {
56 parsers[i] = new SimpleDateFormat(supportedFormats[i]);
57 parsers[i].setLenient(true);
58 }
59 StringBuffer tooltipBuff = new StringBuffer("<html><b>Supported input formats:</b><br>");
60 for (String supportedFormat : supportedFormats) {
61 tooltipBuff.append(supportedFormat).append("<br>");
62 }
63 tooltipBuff.append("<b>AT-style time specification</b><br>");
64 tooltipBuff.append("timestamp<br><br>");
65 tooltipBuff.append("Copyright (C) 2003-2005 Sasa Markovic, All Rights Reserved</html>");
66 helpText = tooltipBuff.toString();
67 }
68
69 private JLabel topLabel = new JLabel("Enter timestamp or readable date:");
70 private JTextField inputField = new JTextField(25);
71 private JButton convertButton = new JButton("Convert");
72 private JButton helpButton = new JButton("Help");
73
74 private static final SimpleDateFormat OUTPUT_DATE_FORMAT =
75 new SimpleDateFormat("MM/dd/yy HH:mm:ss EEE");
76
77 Epoch() {
78 super("Epoch");
79 constructUI();
80 timer.start();
81 }
82
83 private void constructUI() {
84 JPanel c = (JPanel) getContentPane();
85 c.setLayout(new BorderLayout(3, 3));
86 c.add(topLabel, BorderLayout.NORTH);
87 c.add(inputField, BorderLayout.WEST);
88 c.add(convertButton, BorderLayout.CENTER);
89 convertButton.setToolTipText(helpText);
90 convertButton.addActionListener(new ActionListener() {
91 public void actionPerformed(ActionEvent e) {
92 convert();
93 }
94 });
95 c.add(helpButton, BorderLayout.EAST);
96 helpButton.addActionListener(new ActionListener() {
97 public void actionPerformed(ActionEvent e) {
98 JOptionPane.showMessageDialog(helpButton, helpText, "Epoch Help", JOptionPane.INFORMATION_MESSAGE);
99 }
100 });
101 inputField.requestFocus();
102 getRootPane().setDefaultButton(convertButton);
103 setResizable(false);
104 setDefaultCloseOperation(EXIT_ON_CLOSE);
105 pack();
106 centerOnScreen();
107 setVisible(true);
108 }
109
110 void centerOnScreen() {
111 Toolkit t = Toolkit.getDefaultToolkit();
112 Dimension screenSize = t.getScreenSize();
113 Dimension frameSize = getPreferredSize();
114 double x = (screenSize.getWidth() - frameSize.getWidth()) / 2;
115 double y = (screenSize.getHeight() - frameSize.getHeight()) / 2;
116 setLocation((int) x, (int) y);
117 }
118
119 private void convert() {
120 String time = inputField.getText().trim();
121 if (time.length() > 0) {
122
123 try {
124 long timestamp = Long.parseLong(time);
125 Date date = new Date(timestamp * 1000L);
126 formatDate(date);
127 }
128 catch (NumberFormatException nfe) {
129
130 try {
131 inputField.setText("" + parseDate(time));
132 }
133 catch (RrdException e) {
134 inputField.setText("Could not convert, sorry");
135 }
136 }
137 }
138 }
139
140 private void showTimestamp() {
141 long timestamp = Util.getTime();
142 setTitle(timestamp + " seconds since epoch");
143 }
144
145 void formatDate(Date date) {
146 inputField.setText(OUTPUT_DATE_FORMAT.format(date));
147 }
148
149 private long parseDate(String time) throws RrdException {
150 for (SimpleDateFormat parser : parsers) {
151 try {
152 return Util.getTimestamp(parser.parse(time));
153 }
154 catch (ParseException e) {
155
156 }
157 }
158 return new TimeParser(time).parse().getTimestamp();
159 }
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166 public static void main(String[] args) {
167 new Epoch();
168 }
169 }