001/* 
002 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the Eclipse Public License v1.0
006 * which accompanies this distribution, and is available at
007 * http://www.eclipse.org/legal/epl-v10.html
008 *
009 * Contributors:
010 *     stan
011 *
012 * $Id$
013 */
014
015package org.nuxeo.ecm.platform.rendering.fm.extensions;
016
017import java.text.DateFormat;
018import java.util.Date;
019import java.util.List;
020import java.util.Locale;
021
022import freemarker.template.SimpleDate;
023import freemarker.template.SimpleScalar;
024import freemarker.template.TemplateMethodModelEx;
025import freemarker.template.TemplateModelException;
026
027/**
028 * Format a date with the specified locale.
029 *
030 * @author <a href="mailto:stan@nuxeo.com">Sun Seng David TAN</a>
031 */
032public class FormatDate implements TemplateMethodModelEx {
033
034    public Object exec(List arguments) throws TemplateModelException {
035        if (arguments.size() != 2) {
036            throw new TemplateModelException(
037                    "Invalid number of arguments for formatDate(Date date, String locale) method");
038        }
039        if (!(arguments.get(0) instanceof SimpleDate && arguments.get(1) instanceof SimpleScalar)) {
040            throw new TemplateModelException(
041                    "Invalid arguments format for the method formatDate : expecting (Date date, String local).");
042        }
043        SimpleScalar scalar = (SimpleScalar) arguments.get(1);
044        if (scalar == null) {
045            throw new TemplateModelException("the argument local is not defined");
046        }
047
048        SimpleDate simpledate = (SimpleDate) arguments.get(0);
049        if (simpledate == null) {
050            throw new TemplateModelException("the argument date is not defined");
051        }
052
053        Date date = simpledate.getAsDate();
054
055        Locale locale = new Locale(scalar.getAsString());
056
057        DateFormat df = DateFormat.getDateInstance(DateFormat.LONG, locale);
058
059        return new SimpleScalar(df.format(date));
060    }
061
062}