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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_07) on Tue Oct 16 12:57:45 EDT 2007 --><TITLE>Precondition</TITLE><META NAME="keywords" CONTENT="JSHOP2.Precondition class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Precondition";}</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" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A 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CLASS DATA ======== --><H2><FONT SIZE="-1">JSHOP2</FONT><BR>Class Precondition</H2><PRE>java.lang.Object <IMG SRC="../resources/inherit.gif" ALT="extended by "><B>JSHOP2.Precondition</B></PRE><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../JSHOP2/PreconditionAssign.html" title="class in JSHOP2">PreconditionAssign</A>, <A HREF="../JSHOP2/PreconditionAtomic.html" title="class in JSHOP2">PreconditionAtomic</A>, <A HREF="../JSHOP2/PreconditionCall.html" title="class in JSHOP2">PreconditionCall</A>, <A HREF="../JSHOP2/PreconditionForAll.html" title="class in JSHOP2">PreconditionForAll</A>, <A HREF="../JSHOP2/PreconditionNegation.html" title="class in JSHOP2">PreconditionNegation</A>, <A HREF="../JSHOP2/PreconditionNil.html" title="class in JSHOP2">PreconditionNil</A></DD></DL><HR><DL><DT><PRE>public abstract class <B>Precondition</B><DT>extends java.lang.Object</DL></PRE><P>This abstract class represents an iterator over all the possible bindings that can satisfy its corresponding logical expression at run time.<P><P><DL><DT><B>Version:</B></DT> <DD>1.0.3</DD><DT><B>Author:</B></DT> <DD>Okhtay Ilghami, <a href="http://www.cs.umd.edu/~okhtay">http://www.cs.umd.edu/~okhtay</a></DD></DL><HR><P><!-- =========== FIELD SUMMARY =========== --><A NAME="field_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>Field Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>(package private) <A HREF="../JSHOP2/Term.html" title="class in JSHOP2">Term</A>[][]</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#bindings">bindings</A></B></CODE><BR> The array that stores the sorted satisfiers for this logical precondition if this is a <code>:sort-by</code> logical precondition.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>(package private) int</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#bindingsIdx">bindingsIdx</A></B></CODE><BR> The index pointing to the next satisfier to be returned in case this is a <code>:sort-by</code> logical precondition.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>private java.util.Comparator<<A HREF="../JSHOP2/Term.html" title="class in JSHOP2">Term</A>[]></CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#comp">comp</A></B></CODE><BR> The function to be used to sort the possible bindings if this is a <code>:sort-by</code> logical precondition.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>private boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#first">first</A></B></CODE><BR> Whether or not this logical expression is marked <code>:first</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>private boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#firstCall">firstCall</A></B></CODE><BR> Whether or not this is the first time the <code>nextBinding</code> function is called for this object after the latest call to its <code>reset</code> function.</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="../JSHOP2/Precondition.html#Precondition()">Precondition</A></B>()</CODE><BR> </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>abstract void</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#bind(JSHOP2.Term[])">bind</A></B>(<A HREF="../JSHOP2/Term.html" title="class in JSHOP2">Term</A>[] binding)</CODE><BR> This abstract function binds the logical expression to a given binding.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../JSHOP2/Term.html" title="class in JSHOP2">Term</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#nextBinding()">nextBinding</A></B>()</CODE><BR> This function returns the next satisfier for this logical expression.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected abstract <A HREF="../JSHOP2/Term.html" title="class in JSHOP2">Term</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#nextBindingHelper()">nextBindingHelper</A></B>()</CODE><BR> This abstract function is called by the <code>nextBinding</code> function and does the subclass-specific part of the finding the next binding.</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="../JSHOP2/Precondition.html#reset()">reset</A></B>()</CODE><BR> This function resets this iterator so that it can iterate over again.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected abstract void</CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#resetHelper()">resetHelper</A></B>()</CODE><BR> This abstract function is called by the <code>reset</code> function and does the subclass-specific part of the resetting.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../JSHOP2/Precondition.html" title="class in JSHOP2">Precondition</A></CODE></FONT></TD><TD><CODE><B><A HREF="../JSHOP2/Precondition.html#setComparator(java.util.Comparator)">setComparator</A></B>(java.util.Comparator<<A HREF="../JSHOP2/Term.html" title="class in JSHOP2">Term</A>[]> compIn)</CODE><BR> To set the function to be used to sort the possible bindings that satisfy this logical precondition.</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="../JSHOP2/Precondition.html#setFirst(boolean)">setFirst</A></B>(boolean firstIn)</CODE><BR> To set whether or not this function is marked <code>:fist</code>.</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.Object</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P>⌨️ 快捷键说明
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