JFormattedTextField : input time duration value
The code:
public static void main(String[] args) {
JFrame jFrame = new JFrame();
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jFrame.setLayout(new BorderLayout());
jFrame.setPreferredSize(new Dimension(500, 500));
final JFormattedTextField comp = new JFormattedTextField();
comp.setFormatterFactory(new DefaultFormatterFactory(new DateFormatter(new SimpleDateFormat(
"H'h' mm'm'"))));
comp.setValue(Calendar.getInstance().getTime());
comp.addPropertyChangeListener("value", new PropertyChangeListener() {
@Override public void propertyChange(PropertyChangeEvent evt) {
System.out.println(comp.getValue());
}
});
jFrame.getContentPane().add(comp, BorderLayout.CENTER);
jFrame.pack();
jFrame.setVisible(true);
}
JFormattedTextField and short time format
Given a SimpleDateFormat("MM/dd/yyyy"), the lenient interpretation of the Calendar value 30/11/2013 is 6/11/2015. You can defeat this behavior by specifying setLenient(false) in the format used to construct your JFormattedTextField.
In this example, an InputVerifier is used to check a List<SimpleDateFormat> for valid entries. For example,
static {
validForms.add(new SimpleDateFormat("MM/dd/yyyy"));
validForms.add(new SimpleDateFormat("MM/dd/yy"));
for (SimpleDateFormat f : validForms) {
f.setLenient(false);
}
}
Addendum: In your updated example,
SimpleDateFormat f = new java.text.SimpleDateFormat("MM/dd/yyyy");
f.setLenient(false);
jFormattedTextField1.setFormatterFactory(
new javax.swing.text.DefaultFormatterFactory(
new javax.swing.text.DateFormatter(f)));
SSCCE, for reference:
public class NewJFrame extends javax.swing.JFrame {
public NewJFrame() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jFormattedTextField1 = new javax.swing.JFormattedTextField();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
SimpleDateFormat f = new java.text.SimpleDateFormat("MM/dd/yyyy");
f.setLenient(false);
jFormattedTextField1.setFormatterFactory(
new javax.swing.text.DefaultFormatterFactory(
new javax.swing.text.DateFormatter(f)));
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jLabel1.setText("Date :");
jLabel2.setText("Output :");
jLabel3.setText("Click here to see the output");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 284, Short.MAX_VALUE)
.addComponent(jFormattedTextField1))
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton1)
.addGap(125, 125, 125)))));
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jFormattedTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
jTextField1.setText(jFormattedTextField1.getText());
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
private javax.swing.JButton jButton1;
private javax.swing.JFormattedTextField jFormattedTextField1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JTextField jTextField1;
}
Java Custom Date Argument Input
tl;dr
Duration.parse( "PT1H30M" ).toMillis()
ISO 8601
No need to invent your own custom shorthand format. The ISO 8601 standard already defines a similar format for durations.
The pattern PnYnMnDTnHnMnS uses a P to mark the beginning, a T to separate any years-months-days portion from any hours-minutes-seconds portion.
Examples:
- An hour and a half is
PT1H30M. P3Y6M4Drepresents “three years, six months, four days”.
java.time
The java.time classes use the ISO 8601 formats by default when parsing/generating strings. This includes the Period and Duration classes for representing spans of time not attached to the timeline.
Duration
Duration d = Duration.ofHours( 1 ).plusMinutes( 30 );
String output = d.toString();
PT1H30M
And parsing.
Duration d2 = Duration.parse( "PT1H30M" );
You can ask for the duration a total number of milliseconds.
long millis = d2.toMillis();
5400000
See live code in IdeOne.com.
But remember that java.time classes have much finer resolution, nanoseconds. So you may be losing data when asking for milliseconds.
Also, I strongly suggest you stick to using the java.time objects and the ISO 8601 strings and avoid representing date-time values as a count of milliseconds or such.
Period
For years-months-days, use the Period class.
Period p = Period.parse( "P3Y6M4D" );
…and…
String output = p.toString();
P3Y6M4D
Note the normalized method on this class. For example, a period of "1 Year and 15 months" will be normalized to "2 years and 3 months".
Also note that a Period is built on LocalDate info. As such it has no concept of time zones nor any idea about anomalies such as Daylight Saving Time (DST).
This class works with a resolution of whole days. So the class does not provide an explicit way to count milliseconds.
About java.time
The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.
The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.
To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.
Where to obtain the java.time classes?
- Java SE 8 and SE 9 and later
- Built-in.
- Part of the standard Java API with a bundled implementation.
- Java 9 adds some minor features and fixes.
- Java SE 6 and SE 7
- Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
- Android
- The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
- See How to use ThreeTenABP….
The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.
Best way to constrain user to enter a time in a JTextField
you could use a JFormattedTextField have a look at the example below, this will create a JFormattedTextField which will accept only numbers and put them in the form XXhXXminXXs then add a ActionListener to the JFormattedTextField and in that attempt to parse to a valid time object when ENTER for now I only show the use of the JFormattedTextField and the ActionListener I didn't attempt to convert or any converting and parsing for valid time:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.ParseException;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.text.MaskFormatter;
public class FormattedTextFieldExample {
public FormattedTextFieldExample() {
initComponents();
}
private void initComponents() {
JFrame frame = new JFrame("JFormattedTextField Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MaskFormatter mask = null;
try {
mask = new MaskFormatter("##h##min##s");//the # is for numeric values
mask.setPlaceholderCharacter('#');
} catch (ParseException e) {
e.printStackTrace();
}
//
// Create a formatted text field that accept a valid time.
//
final JFormattedTextField timeField = new JFormattedTextField(mask);
//Add ActionListener for when enter is pressed
timeField.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if (source == timeField) {
//parse to a valid time here
System.out.println(timeField.getText());
}
}
});
frame.add(timeField);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new FormattedTextFieldExample();
}
});
}
}
JTextArea Filters and/or Inputs of time (00:00:00) Java
So, dealing with duration is a lot different, as many of the normal "validation" process can be discarded (for example, you don't really care about the hours, as the user might need to put 100 hours, for example)...
So, based on this time field example, I stripped back the API and re-built it (it really need an over haul any way ;))
So I ended up with this duration field...
At it's heart, it's nothing more than a series of fields with DocumentFilters, DocumentListeners, some key bindings and general automation to make it "look" like a single field...
import java.awt.Component;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.util.List;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;
public class DurationField extends AbstractTimeField {
private HourDocumentFilter hourDocumentFilter;
private JTextField secondField;
private DocumentFilter secondDocumentFilter;
private FocusListener secondFocusHandler;
public DurationField() {
setDuration(0, 0, 0);
}
public void setDuration(int hour, int minute, int seconds) {
setHour(hour);
setMinute(minute);
setSeconds(seconds);
}
public long getDuration() throws NumberFormatException {
int hour = getHour();
int minute = getMinute();
int second = getSecond();
return (hour * 60 * 60 * 1000)
+ (minute * 60 * 1000)
+ (second * 1000);
}
@Override
public void setHour(int hour) {
setFieldValue(getHourField(), hour, 3);
}
public void setSeconds(int seconds) {
setFieldValue(getSecondField(), seconds, 2);
}
public int getSecond() throws NumberFormatException {
return Integer.parseInt(getSecondField().getText());
}
@Override
protected JTextField createHourField() {
JTextField field = super.createHourField();
field.setColumns(4);
return field;
}
@Override
protected int getHourFocusForwardLength() {
return -1;
}
protected int getSecondFocusForwardLength() {
return 2;
}
protected JTextField createSecondField() {
JTextField secondField = new JTextField(2);
((AbstractDocument) secondField.getDocument()).setDocumentFilter(getSecondDocumentFilter());
secondField.addFocusListener(getSecondFocusHandler());
secondField.setHorizontalAlignment(JTextField.RIGHT);
secondField.getDocument().addDocumentListener(new MoveFocusForwardHandler(secondField, getMinuteFocusForwardLength()));
return secondField;
}
@Override
protected JComponent[] getTimeFields() {
return new JComponent[]{
getHourField(),
new JLabel(":"),
getMinuteField(),
new JLabel("."),
getSecondField()
};
}
@Override
protected List<JComponent> initFocusTransveralOrder() {
List<JComponent> order = super.initFocusTransveralOrder();
order.add(getSecondField());
return order;
}
@Override
protected void installKeyBindings() {
super.installKeyBindings();
JTextField minuteField = getMinuteField();
installKeyBinding(
minuteField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_PERIOD, 0),
"toSecondField",
new MoveFocusForward());
installKeyBinding(
minuteField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0),
"afterMinuteArrow",
new MoveFieldFocusForward(minuteField, true));
installKeyBinding(
minuteField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_NUMPAD6, 0),
"afterMinuteKeyPad",
new MoveFieldFocusForward(minuteField, false));
JTextField secondField = getMinuteField();
installKeyBinding(
secondField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0),
"beforeSecond",
new MoveFieldFocusBackward(minuteField, true));
installKeyBinding(
secondField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_NUMPAD4, 0),
"beforeSecond",
new MoveFieldFocusBackward(secondField, false));
}
public JTextField getSecondField() {
if (secondField == null) {
secondField = createSecondField();
}
return secondField;
}
@Override
protected DocumentFilter getHourDocumentFilter() {
if (hourDocumentFilter == null) {
hourDocumentFilter = new HourDocumentFilter();
}
return hourDocumentFilter;
}
protected DocumentFilter getSecondDocumentFilter() {
if (secondDocumentFilter == null) {
secondDocumentFilter = new SecondDocumentFilter();
}
return secondDocumentFilter;
}
/**
* Returns the focus listener used to monitor the hour field
*
* @return
*/
protected FocusListener getSecondFocusHandler() {
if (secondFocusHandler == null) {
secondFocusHandler = new SecondFocusHandler();
}
return secondFocusHandler;
}
protected void secondFieldLostFocus(FocusEvent evt) {
String text = getSecondField().getText();
if (text.length() < 2) {
text = pad(text, 2);
getSecondField().setText(text);
}
}
/**
* Hour field focus handler. This watches for focus lost events a automatically pads the field with a leading "0" if the field is only 1 character in length
*/
protected class SecondFocusHandler extends AbstractFocusHandler {
@Override
public void focusLost(FocusEvent e) {
secondFieldLostFocus(e);
}
}
protected class HourDocumentFilter extends DocumentFilter {
@Override
public void insertString(DocumentFilter.FilterBypass fb, int offset, String text, AttributeSet attr) throws BadLocationException {
System.out.println("insert: offset = " + offset + "; text = " + text);
super.insertString(fb, offset, text, attr);
}
@Override
public void replace(DocumentFilter.FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException {
try {
// We convert the value here to make sure it's a number...
int value = Integer.parseInt(text);
super.replace(fb, offset, length, text, attrs);
} catch (NumberFormatException exp) {
}
}
}
protected class SecondDocumentFilter extends DocumentFilter {
@Override
public void insertString(DocumentFilter.FilterBypass fb, int offset, String text, AttributeSet attr) throws BadLocationException {
super.insertString(fb, offset, text, attr);
}
@Override
public void replace(DocumentFilter.FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException {
try {
boolean isAcceptable = false;
// How long is the text been added
int strLength = text.length();
// Convert the value to an integer now and save us the hassel
int value = Integer.parseInt(text);
// If the length is only 1, probably a new character has been added
if (strLength == 1) {
// The valid range of values we can accept
int upperRange = 9;
int lowerRange = 0;
// Is the value acceptable..
if (value >= lowerRange && value <= upperRange) {
isAcceptable = true;
}
} else {
// Basically, we are going to trim the value down to at max 2 characters
// Need to know at what offest...
// 2 - offset..
// offset == 0, length = 2 - offset = 2
// offset == 1, length = 2 - offset = 1
strLength = 2 - offset;
String timeText = text.substring(offset, strLength);
value = Integer.parseInt(timeText);
if (value >= 0 && value <= 59) {
// Pad out the value as required
text = pad(value, 2);
isAcceptable = true;
}
}
if (isAcceptable) {
super.replace(fb, offset, length, text, attrs);
}
} catch (NumberFormatException exp) {
}
}
}
}
And the abstract parent class...
import java.awt.Component;
import java.awt.Container;
import java.awt.FocusTraversalPolicy;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.KeyboardFocusManager;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;
import javax.swing.text.JTextComponent;
public abstract class AbstractTimeField extends JPanel {
private DocumentFilter minDocumentFilter;
private FocusListener hourFocusHandler;
private FocusListener minuteFocusHandler;
private JTextField hourField;
private JTextField minuteField;
private JPanel pnlFields;
private List<JComponent> focusOrder;
public AbstractTimeField() {
initUI();
installKeyBindings();
}
protected void initUI() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
add(getTimeFieldsPanel(), gbc);
}
protected void installKeyBindings() {
JTextField hourField = getHourField();
installKeyBinding(
hourField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_SEMICOLON, KeyEvent.SHIFT_DOWN_MASK),
"toMinuteField",
new MoveFocusForward());
installKeyBinding(
hourField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0),
"afterHourArrow",
new MoveFieldFocusForward(hourField, true));
installKeyBinding(
hourField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_NUMPAD6, 0),
"afterHourKeyPad",
new MoveFieldFocusForward(hourField, false));
JTextField minuteField = getMinuteField();
installKeyBinding(
minuteField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0),
"beforeMinuteArrow",
new MoveFieldFocusBackward(minuteField, true));
installKeyBinding(
minuteField,
JComponent.WHEN_FOCUSED,
KeyStroke.getKeyStroke(KeyEvent.VK_NUMPAD4, 0),
"beforeMinuteKeyPad",
new MoveFieldFocusBackward(minuteField, false));
}
protected JPanel getTimeFieldsPanel() {
if (pnlFields == null) {
pnlFields = new JPanel(new GridBagLayout());
pnlFields.setBorder(new CompoundBorder(UIManager.getBorder("TextField.border"), new EmptyBorder(0, 2, 0, 2)));
pnlFields.setBackground(UIManager.getColor("TextField.background"));
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
for (JComponent field : getTimeFields()) {
field.setBorder(null);
pnlFields.add(field, gbc);
gbc.gridx++;
}
}
return pnlFields;
}
protected JComponent[] getTimeFields() {
return new JComponent[]{
getHourField(),
new JLabel(":"),
getMinuteField()
};
}
protected List<JComponent> initFocusTransveralOrder() {
List<JComponent> focusOrder = new ArrayList<>(3);
focusOrder.add(getHourField());
focusOrder.add(getMinuteField());
return focusOrder;
}
protected List<JComponent> getFocusTraversalOrder() {
if (focusOrder == null) {
focusOrder = initFocusTransveralOrder();
}
return focusOrder;
}
protected int getHourFocusForwardLength() {
return 2;
}
protected int getMinuteFocusForwardLength() {
return 2;
}
protected JTextField createHourField() {
JTextField hourField = new JTextField(2);
((AbstractDocument) hourField.getDocument()).setDocumentFilter(getHourDocumentFilter());
hourField.addFocusListener(getHourFocusHandler());
hourField.setHorizontalAlignment(JTextField.RIGHT);
hourField.getDocument().addDocumentListener(new MoveFocusForwardHandler(hourField, getHourFocusForwardLength()));
return hourField;
}
public JTextField getHourField() {
if (hourField == null) {
hourField = createHourField();
}
return hourField;
}
protected JTextField createMinuteField() {
JTextField minuteField = new JTextField(2);
((AbstractDocument) minuteField.getDocument()).setDocumentFilter(getMinuteDocumentFilter());
minuteField.addFocusListener(getMinuteFocusHandler());
minuteField.setHorizontalAlignment(JTextField.RIGHT);
minuteField.getDocument().addDocumentListener(new MoveFocusForwardHandler(hourField, getMinuteFocusForwardLength()));
return minuteField;
}
public int getHour() throws NumberFormatException {
return getFieldValue(getHourField());
}
public int getMinute() throws NumberFormatException {
return getFieldValue(getMinuteField());
}
protected int getFieldValue(JTextComponent field) throws NumberFormatException {
return Integer.parseInt(field.getText());
}
public void setHour(int hour) {
setFieldValue(getHourField(), hour, 2);
}
public void setMinute(int minute) {
setFieldValue(getMinuteField(), minute, 2);
}
protected void setFieldValue(JTextComponent field, int value, int padding) {
String text = pad(value, padding);
field.setText(text);
}
public JTextField getMinuteField() {
if (minuteField == null) {
minuteField = createMinuteField();
}
return minuteField;
}
/**
* Returns the document filter used to filter the hour field
*
* @return
*/
protected abstract DocumentFilter getHourDocumentFilter();
/**
* Returns the document filter user to filter the minute field
*
* @return
*/
protected DocumentFilter getMinuteDocumentFilter() {
if (minDocumentFilter == null) {
minDocumentFilter = new MinuteDocumentFilter();
}
return minDocumentFilter;
}
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