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• DateRenderer.java

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org.stringtemplate.v4.DateRenderer Maven / Gradle / Ivy

/*
 * [The "BSD license"]
 *  Copyright (c) 2011 Terence Parr
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.stringtemplate.v4;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * A renderer for {@link Date} and {@link Calendar} objects. It understands a
 * variety of format names as shown in {@link #formatToInt} field. By default it
 * assumes {@code "short"} format. A prefix of {@code "date:"} or
 * {@code "time:"} shows only those components of the time object.
 */
public class DateRenderer implements AttributeRenderer {
    public static final Map formatToInt =
        new HashMap() {
            {
                put("short", DateFormat.SHORT);
                put("medium", DateFormat.MEDIUM);
                put("long", DateFormat.LONG);
                put("full", DateFormat.FULL);

                put("date:short", DateFormat.SHORT);
                put("date:medium", DateFormat.MEDIUM);
                put("date:long", DateFormat.LONG);
                put("date:full", DateFormat.FULL);

                put("time:short", DateFormat.SHORT);
                put("time:medium", DateFormat.MEDIUM);
                put("time:long", DateFormat.LONG);
                put("time:full", DateFormat.FULL);
            }
        };

	@Override
    public String toString(Object o, String formatString, Locale locale) {
        Date d;
        if ( formatString==null ) formatString = "short";
        if ( o instanceof Calendar ) d = ((Calendar)o).getTime();
        else d = (Date)o;
        Integer styleI = formatToInt.get(formatString);
        DateFormat f;
        if ( styleI==null ) f = new SimpleDateFormat(formatString, locale);
        else {
            int style = styleI.intValue();
            if ( formatString.startsWith("date:") ) f = DateFormat.getDateInstance(style, locale);
            else if ( formatString.startsWith("time:") ) f = DateFormat.getTimeInstance(style, locale);
            else f = DateFormat.getDateTimeInstance(style, style, locale);
        }
        return f.format(d);
    }
}