| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.core; |
| |
| |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.*; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.team.core.history.ITag; |
| |
| /** |
| * A tag in CVS gives a label to a collection of revisions. The labels can represent a version, a branch, |
| * or a date. |
| */ |
| public class CVSTag implements ITag { |
| |
| public final static int HEAD = 0; |
| public final static int BRANCH = 1; |
| public final static int VERSION = 2; |
| public final static int DATE = 3; |
| |
| public static final CVSTag DEFAULT = new CVSTag(); |
| public static final CVSTag BASE = new CVSTag("BASE", VERSION); //$NON-NLS-1$ |
| |
| protected String name; |
| protected int type; |
| |
| private static final String DATE_TAG_NAME_FORMAT = "dd MMM yyyy HH:mm:ss Z";//$NON-NLS-1$ |
| private static final SimpleDateFormat tagNameFormat = new SimpleDateFormat(DATE_TAG_NAME_FORMAT, Locale.US); |
| protected static synchronized String dateToTagName(Date date){ |
| tagNameFormat.setTimeZone(TimeZone.getTimeZone("GMT"));//$NON-NLS-1$ |
| return tagNameFormat.format(date); |
| } |
| protected static Date tagNameToDate(String name){ |
| if (name == null) return null; |
| try { |
| return tagNameFormat.parse(name); |
| } catch (ParseException e) { |
| CVSProviderPlugin.log(new CVSException("Tag name " + name + " is not of the expected format " + DATE_TAG_NAME_FORMAT, e)); //$NON-NLS-1$ //$NON-NLS-2$ |
| return null; |
| } |
| } |
| |
| public CVSTag() { |
| this("HEAD", HEAD); //$NON-NLS-1$ |
| } |
| |
| public CVSTag(String name, int type) { |
| this.name = name; |
| this.type = type; |
| } |
| //Write a date in local date tag format |
| public CVSTag(Date date) { |
| this(dateToTagName(date), DATE); |
| } |
| |
| public boolean equals(Object other) { |
| if(other == this) return true; |
| if (!(other instanceof CVSTag)) return false; |
| |
| CVSTag tag = ((CVSTag)other); |
| if (getType() != tag.getType()) return false; |
| if (!getName().equals(tag.getName())) return false; |
| return true; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public int getType() { |
| // TODO: getType() will not return accurate types for Tags retrieved from the local CVS Entries file. See Bug: 36758 |
| return type; |
| } |
| |
| public int hashCode() { |
| return name.hashCode(); |
| } |
| |
| public int compareTo(CVSTag other) { |
| if(getType() == DATE && other.getType()== DATE){ |
| Date date1 = asDate(); |
| Date date2 = other.asDate(); |
| if(date1 == null || date2 == null)return -1; |
| return date1.compareTo(date2); |
| } |
| return getName().compareToIgnoreCase(other.getName()); |
| } |
| |
| public static boolean equalTags(CVSTag tag1, CVSTag tag2) { |
| if (tag1 == null) tag1 = CVSTag.DEFAULT; |
| if (tag2 == null) tag2 = CVSTag.DEFAULT; |
| return tag1.equals(tag2); |
| } |
| |
| public static IStatus validateTagName(String tagName) { |
| if (tagName == null) |
| return new CVSStatus(IStatus.ERROR, CVSMessages.CVSTag_nullName); |
| if (tagName.equals("")) //$NON-NLS-1$ |
| return new CVSStatus(IStatus.ERROR, CVSMessages.CVSTag_emptyName); |
| if (!Character. isLetter(tagName.charAt(0))) |
| return new CVSStatus(IStatus.ERROR, CVSMessages.CVSTag_beginName); |
| |
| for (int i = 0; i < tagName.length(); i++) { |
| char c = tagName.charAt(i); |
| if ( Character.isSpaceChar(c) || c == '$' || c == ',' || c == '.' || c == ':' || c == ';' || c == '@' || c == '|') |
| return new CVSStatus(IStatus.ERROR, CVSMessages.CVSTag_badCharName); |
| } |
| return new CVSStatus(IStatus.OK, CVSMessages.ok); |
| } |
| |
| /** |
| * Return the date this tag represents or <code>null</code> |
| * if the tag is not of type DATE. |
| * @return the date of the tag or <code>null</code> |
| */ |
| public Date asDate(){ |
| return tagNameToDate(name); |
| } |
| |
| } |