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SVNKit Java(tm) Subversion JavaHL API implementation
/**
* @copyright
* ====================================================================
* Copyright (c) 2003-2004,2007 CollabNet. All rights reserved.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://subversion.tigris.org/license-1.html.
* If newer versions of this license are posted there, you may use a
* newer version instead, at your option.
*
* This software consists of voluntary contributions made by many
* individuals. For exact contribution history, see the revision
* history and logs, available at http://subversion.tigris.org/.
* ====================================================================
* @endcopyright
*/
package org.tigris.subversion.javahl;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
/**
* Class to specify a revision in a svn command.
*/
public class Revision implements java.io.Serializable
{
// Update the serialVersionUID when there is a incompatible change
// made to this class. See any of the following, depending upon
// the Java release.
// http://java.sun.com/j2se/1.3/docs/guide/serialization/spec/version.doc7.html
// http://java.sun.com/j2se/1.4/pdf/serial-spec.pdf
// http://java.sun.com/j2se/1.5.0/docs/guide/serialization/spec/version.html#6678
// http://java.sun.com/javase/6/docs/platform/serialization/spec/version.html#6678
private static final long serialVersionUID = 1L;
/**
* kind of revision specified
*/
protected int revKind;
/**
* Create a new revision
* @deprecated
* @param kind kind of revision
*/
public Revision(int kind)
{
this(kind, true);
}
/**
* Internally create a new revision
* @param kind kind of revision
* @param marker marker to differentiate from the public deprecated
* version
*/
protected Revision(int kind, boolean marker)
{
if (kind < RevisionKind.unspecified || kind > RevisionKind.head)
throw new IllegalArgumentException(
kind+" is not a legal revision kind");
revKind = kind;
}
/**
* Returns the kind of the Revsion
* @return kind
*/
public int getKind()
{
return revKind;
}
/**
* return the textual representation of the revision
* @return english text
*/
public String toString()
{
switch(revKind) {
case Kind.base : return "BASE";
case Kind.committed : return "COMMITTED";
case Kind.head : return "HEAD";
case Kind.previous : return "PREV";
case Kind.working : return "WORKING";
}
return super.toString();
}
/* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
public int hashCode()
{
return revKind * -1;
}
/**
* compare to revision objects
* @param target
* @return if both object have equal content
*/
public boolean equals(Object target) {
if (this == target)
return true;
if (!(target instanceof Revision))
return false;
return ((Revision)target).revKind == revKind;
}
/**
* Creates a Revision.Number object
* @param revisionNumber the revision number of the new object
* @return the new object
* @throws IllegalArgumentException If the specified revision
* number is invalid.
*/
public static Revision getInstance(long revisionNumber)
{
return new Revision.Number(revisionNumber);
}
/**
* Factory which creates {@link #Number} objects for valid
* revision numbers only (those greater than zero). For internal
* usage to avoid an IllegalArgumentException, where no external
* consumer of the javahl API passed an invalid revision number.
*
* @param revNumber The revision number to create an object for.
* @return An object representing revNumber, or
* null if the revision number was invalid.
* @since 1.2
*/
static Number createNumber(long revNumber)
{
return (revNumber < 0 ? null : new Number(revNumber));
}
/**
* Creates a Revision.DateSpec objet
* @param revisionDate the date of the new object
* @return the new object
*/
public static Revision getInstance(Date revisionDate)
{
return new Revision.DateSpec(revisionDate);
}
/**
* last commited revision
*/
public static final Revision HEAD = new Revision(Kind.head, true);
/**
* first existing revision
*/
public static final Revision START = new Revision(Kind.unspecified, true);
/**
* last committed revision, needs working copy
*/
public static final Revision COMMITTED = new Revision(Kind.committed,
true);
/**
* previous committed revision, needs working copy
*/
public static final Revision PREVIOUS = new Revision(Kind.previous, true);
/**
* base revision of working copy
*/
public static final Revision BASE = new Revision(Kind.base, true);
/**
* working version in working copy
*/
public static final Revision WORKING = new Revision(Kind.working, true);
/**
* Marker revision number for no real revision
*/
public static final int SVN_INVALID_REVNUM = -1;
/**
* class to specify a Revision by number
*/
public static class Number extends Revision
{
// Update the serialVersionUID when there is a incompatible
// change made to this class.
private static final long serialVersionUID = 1L;
/**
* the revision number
*/
protected long revNumber;
/**
* create a revision by number object
* @param number the number
* @throws IllegalArgumentException If the specified revision
* number is invalid.
*/
public Number(long number)
{
super(Kind.number, true);
if (number < 0)
throw new IllegalArgumentException
("Invalid (negative) revision number: " + number);
revNumber = number;
}
/**
* Returns the revision number
* @return number
*/
public long getNumber()
{
return revNumber;
}
/**
* return the textual representation of the revision
* @return english text
*/
public String toString() {
return Long.toString(revNumber);
}
/**
* compare to revision objects
* @param target
* @return if both object have equal content
*/
public boolean equals(Object target) {
if (!super.equals(target))
return false;
return ((Revision.Number)target).revNumber == revNumber;
}
/* (non-Javadoc)
* @see org.tigris.subversion.javahl.Revision#hashCode()
*/
public int hashCode()
{
return (int)(revNumber ^ (revNumber >>> 32));
}
}
/**
* class to specify a revision by a date
*/
public static class DateSpec extends Revision
{
// Update the serialVersionUID when there is a incompatible change
// made to this class.
private static final long serialVersionUID = 1L;
/**
* the date
*/
protected Date revDate;
/**
* create a revision by date object
* @param date
*/
public DateSpec(Date date)
{
super(Kind.date, true);
if (date == null)
throw new IllegalArgumentException("a date must be specified");
revDate = date;
}
/**
* Returns the date of the revision
* @return the date
*/
public Date getDate()
{
return revDate;
}
/**
* return the textual representation of the revision
* @return english text
*/
public String toString() {
SimpleDateFormat dateFormat =
new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z",
Locale.US);
return '{'+dateFormat.format(revDate)+'}';
}
/**
* compare to revision objects
* @param target
* @return if both object have equal content
*/
public boolean equals(Object target) {
if (!super.equals(target))
return false;
return ((Revision.DateSpec)target).revDate.equals(revDate);
}
/* (non-Javadoc)
* @see org.tigris.subversion.javahl.Revision#hashCode()
*/
public int hashCode()
{
return revDate.hashCode();
}
}
/**
* Various ways of specifying revisions.
*
* Note:
* In contexts where local mods are relevant, the `working' kind
* refers to the uncommitted "working" revision, which may be modified
* with respect to its base revision. In other contexts, `working'
* should behave the same as `committed' or `current'.
*
* the values are defined in RevisionKind because of building reasons
*/
public static final class Kind implements RevisionKind
{
}
}