Java tutorial
/* * Copyright (C) 2011, 2012 Robin Rosenberg * and other copyright owners as documented in the project's IP log. * * This program and the accompanying materials are made available * under the terms of the Eclipse Distribution License v1.0 which * accompanies this distribution, is reproduced below, and is * available at http://www.eclipse.org/org/documents/edl-v10.php * * All rights reserved. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - 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. * * - Neither the name of the Eclipse Foundation, Inc. nor the * names of its contributors may be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "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 COPYRIGHT OWNER OR * CONTRIBUTORS 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.eclipse.jgit.util; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Locale; import java.util.TimeZone; import org.eclipse.jgit.lib.PersonIdent; /** * A utility for formatting dates according to the Git log.date formats plus * extensions. * <p> * The enum {@link org.eclipse.jgit.util.GitDateFormatter.Format} defines the * available types. */ public class GitDateFormatter { private DateFormat dateTimeInstance; private DateFormat dateTimeInstance2; private final Format format; /** * Git and JGit formats */ static public enum Format { /** * Git format: Time and original time zone */ DEFAULT, /** * Git format: Relative time stamp */ RELATIVE, /** * Git format: Date and time in local time zone */ LOCAL, /** * Git format: ISO 8601 plus time zone */ ISO, /** * Git formt: RFC 2822 plus time zone */ RFC, /** * Git format: YYYY-MM-DD */ SHORT, /** * Git format: Seconds size 1970 in UTC plus time zone */ RAW, /** * Locale dependent formatting with original time zone */ LOCALE, /** * Locale dependent formatting in local time zone */ LOCALELOCAL } /** * Create a new Git oriented date formatter * * @param format * a {@link org.eclipse.jgit.util.GitDateFormatter.Format} * object. */ public GitDateFormatter(Format format) { this.format = format; switch (format) { default: break; case DEFAULT: // Not default: dateTimeInstance = new SimpleDateFormat("EEE MMM dd HH:mm:ss yyyy Z", Locale.US); //$NON-NLS-1$ break; case ISO: dateTimeInstance = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z", //$NON-NLS-1$ Locale.US); break; case LOCAL: dateTimeInstance = new SimpleDateFormat("EEE MMM dd HH:mm:ss yyyy", //$NON-NLS-1$ Locale.US); break; case RFC: dateTimeInstance = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z", Locale.US); //$NON-NLS-1$ break; case SHORT: dateTimeInstance = new SimpleDateFormat("yyyy-MM-dd", Locale.US); //$NON-NLS-1$ break; case LOCALE: case LOCALELOCAL: SystemReader systemReader = SystemReader.getInstance(); dateTimeInstance = systemReader.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT); dateTimeInstance2 = systemReader.getSimpleDateFormat("Z"); //$NON-NLS-1$ break; } } /** * Format committer, author or tagger ident according to this formatter's * specification. * * @param ident * a {@link org.eclipse.jgit.lib.PersonIdent} object. * @return formatted version of date, time and time zone */ @SuppressWarnings("boxing") public String formatDate(PersonIdent ident) { switch (format) { case RAW: int offset = ident.getTimeZoneOffset(); String sign = offset < 0 ? "-" : "+"; //$NON-NLS-1$ //$NON-NLS-2$ int offset2; if (offset < 0) offset2 = -offset; else offset2 = offset; int hours = offset2 / 60; int minutes = offset2 % 60; return String.format("%d %s%02d%02d", //$NON-NLS-1$ ident.getWhen().getTime() / 1000, sign, hours, minutes); case RELATIVE: return RelativeDateFormatter.format(ident.getWhen()); case LOCALELOCAL: case LOCAL: dateTimeInstance.setTimeZone(SystemReader.getInstance().getTimeZone()); return dateTimeInstance.format(ident.getWhen()); case LOCALE: TimeZone tz = ident.getTimeZone(); if (tz == null) tz = SystemReader.getInstance().getTimeZone(); dateTimeInstance.setTimeZone(tz); dateTimeInstance2.setTimeZone(tz); return dateTimeInstance.format(ident.getWhen()) + " " //$NON-NLS-1$ + dateTimeInstance2.format(ident.getWhen()); default: tz = ident.getTimeZone(); if (tz == null) tz = SystemReader.getInstance().getTimeZone(); dateTimeInstance.setTimeZone(ident.getTimeZone()); return dateTimeInstance.format(ident.getWhen()); } } }