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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_15) on Thu Aug 28 21:12:45 PDT 2008 --><TITLE>HistoryStrategy (Openfire 3.6.0a Javadoc)</TITLE><META NAME="keywords" CONTENT="org.jivesoftware.openfire.muc.HistoryStrategy class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="HistoryStrategy (Openfire 3.6.0a Javadoc)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" 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ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Openfire 3.6.0a Javadoc</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/jivesoftware/openfire/muc/HistoryRequest.html" title="class in org.jivesoftware.openfire.muc"><B>PREV CLASS</B></A> <A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.Type.html" title="enum in org.jivesoftware.openfire.muc"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?org/jivesoftware/openfire/muc/HistoryStrategy.html" target="_top"><B>FRAMES</B></A> <A HREF="HistoryStrategy.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jivesoftware.openfire.muc</FONT><BR>Class HistoryStrategy</H2><PRE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.jivesoftware.openfire.muc.HistoryStrategy</B></PRE><HR><DL><DT><PRE>public class <B>HistoryStrategy</B><DT>extends <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL></PRE><P><p>Multi-User Chat rooms may cache history of the conversations in the room in order to play them back to newly arriving members.</p> <p>This class is an internal component of MUCRoomHistory that describes the strategy that can be used, and provides a method of administering the history behavior.</p><P><P><DL><DT><B>Author:</B></DT> <DD>Gaston Dombiak, Derek DeMoro</DD></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><A NAME="nested_class_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Nested Class Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static class</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.Type.html" title="enum in org.jivesoftware.openfire.muc">HistoryStrategy.Type</A></B></CODE><BR> Strategy type.</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#HistoryStrategy(org.jivesoftware.openfire.muc.HistoryStrategy)">HistoryStrategy</A></B>(<A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html" title="class in org.jivesoftware.openfire.muc">HistoryStrategy</A> parentStrategy)</CODE><BR> Create a history strategy with the given parent strategy (for defaults) or null if no parent exists.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#addMessage(org.xmpp.packet.Message)">addMessage</A></B>(<A HREF="../../../../org/xmpp/packet/Message.html" title="class in org.xmpp.packet">Message</A> packet)</CODE><BR> Add a message to the current chat history.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#getMaxNumber()">getMaxNumber</A></B>()</CODE><BR> Obtain the maximum number of messages for strategies using message number limitations.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A><<A HREF="../../../../org/xmpp/packet/Message.html" title="class in org.xmpp.packet">Message</A>></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#getMessageHistory()">getMessageHistory</A></B>()</CODE><BR> Obtain the current history as an iterator of messages to play back to a new room member.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/util/ListIterator.html" title="class or interface in java.util">ListIterator</A><<A HREF="../../../../org/xmpp/packet/Message.html" title="class in org.xmpp.packet">Message</A>></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#getReverseMessageHistory()">getReverseMessageHistory</A></B>()</CODE><BR> Obtain the current history to be iterated in reverse mode.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.Type.html" title="enum in org.jivesoftware.openfire.muc">HistoryStrategy.Type</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#getType()">getType</A></B>()</CODE><BR> Obtain the type of history strategy being used.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#hasChangedSubject()">hasChangedSubject</A></B>()</CODE><BR> Returns true if there is a message within the history of the room that has changed the room's subject.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#setContext(java.lang.String, java.lang.String)">setContext</A></B>(<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> subdomain, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> prefix)</CODE><BR> Sets the prefix to use for retrieving and saving settings (and also triggers an immediate loading of properties).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#setMaxNumber(int)">setMaxNumber</A></B>(int max)</CODE><BR> Set the maximum number of messages for strategies using message number limitations.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#setType(org.jivesoftware.openfire.muc.HistoryStrategy.Type)">setType</A></B>(<A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.Type.html" title="enum in org.jivesoftware.openfire.muc">HistoryStrategy.Type</A> newType)</CODE><BR> Set the type of history strategy being used.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jivesoftware/openfire/muc/HistoryStrategy.html#setTypeFromString(java.lang.String)">setTypeFromString</A></B>(<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> typeName)</CODE><BR> Obtain the strategy type from string name.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TH></TR>⌨️ 快捷键说明
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