Java tutorial
/* * 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.syncope.core.misc; import java.text.DecimalFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.commons.lang3.time.DateUtils; import org.apache.syncope.common.lib.SyncopeConstants; /** * Utility class for parsing / formatting date and numbers. */ public final class DataFormat { private static final ThreadLocal<SimpleDateFormat> DATE_FORMAT = new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { SimpleDateFormat sdf = new SimpleDateFormat(); sdf.applyPattern(SyncopeConstants.DEFAULT_DATE_PATTERN); return sdf; } }; private static final ThreadLocal<DecimalFormat> DECIMAL_FORMAT = new ThreadLocal<DecimalFormat>() { @Override protected DecimalFormat initialValue() { return new DecimalFormat(); } }; public static String format(final Date date) { return format(date, true); } public static String format(final Date date, final boolean lenient) { return format(date, lenient, null); } public static String format(final Date date, final boolean lenient, final String conversionPattern) { SimpleDateFormat sdf = DATE_FORMAT.get(); if (conversionPattern != null) { sdf.applyPattern(conversionPattern); } sdf.setLenient(lenient); return sdf.format(date); } public static String format(final long number) { return format(number, null); } public static String format(final long number, final String conversionPattern) { DecimalFormat df = DECIMAL_FORMAT.get(); if (conversionPattern != null) { df.applyPattern(conversionPattern); } return df.format(number); } public static String format(final double number) { return format(number, null); } public static String format(final double number, final String conversionPattern) { DecimalFormat df = DECIMAL_FORMAT.get(); if (conversionPattern != null) { df.applyPattern(conversionPattern); } return df.format(number); } public static Date parseDate(final String source) throws ParseException { return DateUtils.parseDate(source, SyncopeConstants.DATE_PATTERNS); } public static Date parseDate(final String source, final String conversionPattern) throws ParseException { SimpleDateFormat sdf = DATE_FORMAT.get(); sdf.applyPattern(conversionPattern); sdf.setLenient(false); return sdf.parse(source); } public static Number parseNumber(final String source, final String conversionPattern) throws ParseException { DecimalFormat df = DECIMAL_FORMAT.get(); df.applyPattern(conversionPattern); return df.parse(source); } public static void clear() { DATE_FORMAT.remove(); DECIMAL_FORMAT.remove(); } private DataFormat() { // private empty constructor } }