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/* * @(#)DateFormatter.java 1.11 05/11/17 * * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package javax.swing.text; import java.awt.event.*; import java.text.*; import java.util.*; import javax.swing.*; import javax.swing.text.*; /** * DateFormatter is an <code>InternationalFormatter</code> that does its * formatting by way of an instance of <code>java.text.DateFormat</code>. * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing. As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @see java.text.DateFormat * * @version 1.5 04/09/01 * @since 1.4 */ public class DateFormatter extends InternationalFormatter { /** * This is shorthand for * <code>new DateFormatter(DateFormat.getDateInstance())</code>. */ public DateFormatter() { this(DateFormat.getDateInstance()); } /** * Returns a DateFormatter configured with the specified * <code>Format</code> instance. * * @param format Format used to dictate legal values */ public DateFormatter(DateFormat format) { super(format); setFormat(format); } /** * Sets the format that dictates the legal values that can be edited * and displayed. * <p> * If you have used the nullary constructor the value of this property * will be determined for the current locale by way of the * <code>Dateformat.getDateInstance()</code> method. * * @param format DateFormat instance used for converting from/to Strings */ public void setFormat(DateFormat format) { super.setFormat(format); } /** * Returns the Calendar that <code>DateFormat</code> is associated with, * or if the <code>Format</code> is not a <code>DateFormat</code> * <code>Calendar.getInstance</code> is returned. */ private Calendar getCalendar() { Format f = getFormat(); if (f instanceof DateFormat) { return ((DateFormat)f).getCalendar(); } return Calendar.getInstance(); } /** * Returns true, as DateFormatterFilter will support * incrementing/decrementing of the value. */ boolean getSupportsIncrement() { return true; } /** * Returns the field that will be adjusted by adjustValue. */ Object getAdjustField(int start, Map attributes) { Iterator attrs = attributes.keySet().iterator(); while (attrs.hasNext()) { Object key = attrs.next(); if ((key instanceof DateFormat.Field) && (key == DateFormat.Field.HOUR1 || ((DateFormat.Field)key).getCalendarField() != -1)) { return key; } } return null; } /** * Adjusts the Date if FieldPosition identifies a known calendar * field. */ Object adjustValue(Object value, Map attributes, Object key, int direction) throws BadLocationException, ParseException { if (key != null) { int field; // HOUR1 has no corresponding calendar field, thus, map // it to HOUR0 which will give the correct behavior. if (key == DateFormat.Field.HOUR1) { key = DateFormat.Field.HOUR0; } field = ((DateFormat.Field)key).getCalendarField(); Calendar calendar = getCalendar(); if (calendar != null) { calendar.setTime((Date)value); int fieldValue = calendar.get(field); try { calendar.add(field, direction); value = calendar.getTime(); } catch (Throwable th) { value = null; } return value; } } return null; } }