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/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Olexiy Buyanskyy <olexiyb@gmail.com> - Bug 76386 - [History View] CVS Resource History shows revisions from all branches
*******************************************************************************/
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); //$NON-NLS-1$
public static final String VENDOR_REVISION = "1.1.1"; //$NON-NLS-1$
public static final String HEAD_REVISION = "1"; //$NON-NLS-1$
public static final String UNKNOWN_BRANCH = CVSMessages.CVSTag_unknownBranch;
public static final String HEAD_BRANCH = "HEAD"; //$NON-NLS-1$
protected String name;
protected String branchRevision;
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 synchronized static Date tagNameToDate(String name){
if (name == null) return null;
try {
return tagNameFormat.parse(name);
} catch (ParseException e) {
IStatus status = new CVSStatus(IStatus.ERROR, CVSStatus.ERROR,"Tag name " + name + " is not of the expected format " + DATE_TAG_NAME_FORMAT,e ); //$NON-NLS-1$ //$NON-NLS-2$
CVSProviderPlugin.log(new CVSException(status));
return null;
}
}
public CVSTag() {
this("HEAD", HEAD_REVISION, HEAD); //$NON-NLS-1$
}
public CVSTag(String name, int type) {
this.name = name;
this.type = type;
this.branchRevision = null;
}
public CVSTag(String name, String branchRevision, int type) {
this.name = name;
this.branchRevision = branchRevision;
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;
}
/**
* Returns branch revision - unique number given for each branch. Each
* number may have several names (aliases) and define next sequence of
* commits For example HEAD branch revision is 1, branches created from HEAD
* will have 1.1.0.2, 1.1.0.4, etc... Branches created from another branch
* 1.1.1.2.0.2, 1.1.1.2.0.4, etc...
*/
public String getBranchRevision() {
return branchRevision;
}
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 == '$' || c == ',' || c == '.' || c == ':' || c == ';' || c == '@' || c == '|')
return new CVSStatus(IStatus.ERROR, CVSMessages.CVSTag_badCharName);
}
return new CVSStatus(IStatus.OK, CVSMessages.ok);
}
/**
* Return the date this tag represents or <code>null</code>
* if the tag is not of type DATE.
* @return the date of the tag or <code>null</code>
*/
public Date asDate(){
return tagNameToDate(name);
}
public boolean isHeadTag() {
return getType() == HEAD || (getType() == VERSION && getName().equals("HEAD")); //$NON-NLS-1$
}
public boolean isBaseTag() {
return getName().equals("BASE"); //$NON-NLS-1$
}
}
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