| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.myfaces.tobago.internal.util; |
| |
| import javax.faces.convert.ConverterException; |
| import javax.faces.convert.DateTimeConverter; |
| import java.text.DateFormat; |
| import java.text.SimpleDateFormat; |
| import java.util.Locale; |
| |
| /** |
| * This code is taken from myfaces core. |
| * TODO: Should be sharable (e.g. myfaces-commons). |
| */ |
| public final class DateFormatUtils { |
| |
| private static final String TYPE_DATE = "date"; |
| private static final String TYPE_TIME = "time"; |
| private static final String TYPE_BOTH = "both"; |
| private static final String STYLE_DEFAULT = "default"; |
| private static final String STYLE_MEDIUM = "medium"; |
| private static final String STYLE_SHORT = "short"; |
| private static final String STYLE_LONG = "long"; |
| private static final String STYLE_FULL = "full"; |
| |
| private DateFormatUtils() { |
| } |
| |
| /** |
| * Find a pattern for the converter. |
| * Returns the pattern inside the converter, if any. |
| * Otherwise compute the pattern. |
| * |
| * @return the patter or null, if DateFormat.getDateInstance() returns no SimpleDateFormat. |
| */ |
| public static String findPattern(final DateTimeConverter converter) { |
| String pattern = converter.getPattern(); |
| |
| if (pattern == null) { |
| final DateFormat dateFormat = getDateFormat( |
| converter.getType(), converter.getDateStyle(), |
| converter.getTimeStyle(), converter.getLocale()); |
| if (dateFormat instanceof SimpleDateFormat) { |
| final SimpleDateFormat format = (SimpleDateFormat) dateFormat; |
| pattern = format.toPattern(); |
| } |
| } |
| |
| return pattern; |
| } |
| |
| private static DateFormat getDateFormat( |
| final String type, final String dateStyle, final String timeStyle, final Locale locale) { |
| final DateFormat format; |
| if (type.equals(TYPE_DATE)) { |
| format = DateFormat.getDateInstance(calcStyle(dateStyle), locale); |
| } else if (type.equals(TYPE_TIME)) { |
| format = DateFormat.getTimeInstance(calcStyle(timeStyle), locale); |
| } else if (type.equals(TYPE_BOTH)) { |
| format = DateFormat.getDateTimeInstance(calcStyle(dateStyle), |
| calcStyle(timeStyle), |
| locale); |
| } else { |
| throw new ConverterException("invalid type '" + type + "'"); |
| } |
| |
| // format cannot be lenient (JSR-127) |
| format.setLenient(false); |
| return format; |
| } |
| |
| private static int calcStyle(final String name) { |
| if (name.equals(STYLE_DEFAULT)) { |
| return DateFormat.DEFAULT; |
| } |
| if (name.equals(STYLE_MEDIUM)) { |
| return DateFormat.MEDIUM; |
| } |
| if (name.equals(STYLE_SHORT)) { |
| return DateFormat.SHORT; |
| } |
| if (name.equals(STYLE_LONG)) { |
| return DateFormat.LONG; |
| } |
| if (name.equals(STYLE_FULL)) { |
| return DateFormat.FULL; |
| } |
| |
| throw new ConverterException("invalid style '" + name + "'"); |
| } |
| |
| } |