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<HTML><HEAD><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><TITLE>Perst.VersionHistory</TITLE><LINK REL=STYLESHEET HREF="../CommentReport.css" TYPE="text/css"></HEAD><BODY topmargin=0 rightmargin=0 leftmargin=0 style="background-image: url(../titletile.jpg); background-repeat:repeat-x; background-position: 0 0;" ><DIV CLASS="PageHeading">Perst.VersionHistory Class</DIV><DIV CLASS="Description"> Collection of version of versioned object.
Versioned object should be access through version history object.
Instead of storing direct reference to Verson in some component of some other persistent object,
it is necessary to store reference to it's VersionHistory.
<P></DIV><IMG src="../GradLeft.jpg" width=7 height=378 alt="" border="0" style="position:absolute; left:10; top:18;z-Index:2"><IMG src="../GradTop.jpg" width=352 height=7 alt="" border="0" align="top" style="position:absolute; left:10; top:18; z-index:1"><DIV CLASS="Remarks"><SPAN CLASS="RemarkHdrX">Access: </SPAN>Public</DIV><DIV CLASS="Remarks"><SPAN CLASS="RemarkHdrX">Base Classes: </SPAN>PersistentResource</DIV><TABLE CLASS="InfoTable" cellpadding=0 cellspacing=0><TR height=20><TD width=20> </TD><TD valign=top align=left width=9 bgcolor="#cccc66"><IMG SRC="../graycorner.jpg" align=top></TD><TD CLASS="TableLightLabel" WIDTH=206>Members</TD><TD CLASS="TableLightLabel" >Description</TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4464.HTM" TARGET="CNTFRAME">Current</A></TD><TD CLASS="TableLightDesc"> Get/Set current version in version history.
Current version can be explicitely set by setVersion or result of last checkOut
is used as current version
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4466.HTM" TARGET="CNTFRAME">Root</A></TD><TD CLASS="TableLightDesc"> Get root version
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4468.HTM" TARGET="CNTFRAME">AllVersions</A></TD><TD CLASS="TableLightDesc"> Get all versions in version history
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4470.HTM" TARGET="CNTFRAME">CheckOut</A></TD><TD CLASS="TableLightDesc"> Checkout current version: create successor of the current version.
This version has to be checked-in in order to be placed in version history
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4471.HTM" TARGET="CNTFRAME">Latest</A></TD><TD CLASS="TableLightDesc"> Get latest version in version history
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4473.HTM" TARGET="CNTFRAME">GetLatestBefore</A></TD><TD CLASS="TableLightDesc"> Get latest version before specified date
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4474.HTM" TARGET="CNTFRAME">GetEarliestAfter</A></TD><TD CLASS="TableLightDesc"> Get earliest version adter specified date
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4475.HTM" TARGET="CNTFRAME">GetVersionByLabel</A></TD><TD CLASS="TableLightDesc"> Get version with specified label. If there are more than one version marked with
this label, then the latest one will be returned
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4476.HTM" TARGET="CNTFRAME">GetVersionById</A></TD><TD CLASS="TableLightDesc"> Get version with specified ID.
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4477.HTM" TARGET="CNTFRAME">GetEnumerator</A></TD><TD CLASS="TableLightDesc"> Get iterator through all version in version history
Iteration is started from the root version and performed in direction of increaing
version timestamp
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4478.HTM" TARGET="CNTFRAME">VersionHistory</A></TD><TD CLASS="TableLightDesc"> Create new version history
<P></TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4479.HTM" TARGET="CNTFRAME">addVersion</A></TD><TD CLASS="TableLightDesc"> </TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4480.HTM" TARGET="CNTFRAME">versions</A></TD><TD CLASS="TableLightDesc"> </TD><TD width=20> </TD></TR><TR height=20><TD width=20> </TD><TD CLASS="TableLightDesc"> </TD><TD CLASS="TableLightDesc"><A HREF="CWP4481.HTM" TARGET="CNTFRAME">current</A></TD><TD CLASS="TableLightDesc"> </TD><TD width=20> </TD></TR></TABLE></BODY></HTML>⌨️ 快捷键说明
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