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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 Sun May 06 17:59:59 GMT 2007 --><TITLE>Queue (Heritrix 1.12.1)</TITLE><META NAME="keywords" CONTENT="org.archive.queue.Queue interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Queue (Heritrix 1.12.1)";}</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 HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Queue.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/archive/queue/MemQueue.html" title="class in org.archive.queue"><B>PREV CLASS</B></A> <A HREF="../../../org/archive/queue/QueueCat.html" title="class in org.archive.queue"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/archive/queue/Queue.html" target="_top"><B>FRAMES</B></A> <A HREF="Queue.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: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <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.archive.queue</FONT><BR>Interface Queue<T></H2><DL><DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../../org/archive/queue/Deque.html" title="interface in org.archive.queue">Deque</A></DD></DL><HR><DL><DT><PRE>public interface <B>Queue<T></B></DL></PRE><P>An Abstract queue. It should implement FIFO semantics.<P><P><DL><DT><B>Author:</B></DT> <DD>gojomo</DD></DL><HR><P><!-- ========== 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> long</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/archive/queue/Queue.html#deleteMatchedItems(org.apache.commons.collections.Predicate)">deleteMatchedItems</A></B>(org.apache.commons.collections.Predicate matcher)</CODE><BR> All objects in the queue where <code>matcher.match(object)</code> returns true will be deleted from the queue.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/archive/queue/Queue.html#dequeue()">dequeue</A></B>()</CODE><BR> remove an entry from the start of the queue</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/archive/queue/Queue.html#enqueue(T)">enqueue</A></B>(<A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A> obj)</CODE><BR> Add an entry to the end of queue</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.util.Iterator<<A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A>></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/archive/queue/Queue.html#getIterator(boolean)">getIterator</A></B>(boolean inCacheOnly)</CODE><BR> Returns an iterator for the queue.</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/archive/queue/Queue.html#isEmpty()">isEmpty</A></B>()</CODE><BR> is the queue empty?</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> long</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/archive/queue/Queue.html#length()">length</A></B>()</CODE><BR> get the number of elements in the queue</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/archive/queue/Queue.html#peek()">peek</A></B>()</CODE><BR> Give the top object in the queue, leaving it in place to be returned by future peek() or dequeue() invocations.</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/archive/queue/Queue.html#release()">release</A></B>()</CODE><BR> release any OS/IO resources associated with Queue</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/archive/queue/Queue.html#unpeek()">unpeek</A></B>()</CODE><BR> Releases queue from the obligation to return in the next peek()/dequeue() the same object as returned by any previous peek().</TD></TR></TABLE> <P><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Method Detail</B></FONT></TH></TR></TABLE><A NAME="enqueue(java.lang.Object)"><!-- --></A><A NAME="enqueue(T)"><!-- --></A><H3>enqueue</H3><PRE>void <B>enqueue</B>(<A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A> obj)</PRE><DL><DD>Add an entry to the end of queue<P><DD><DL><DT><B>Parameters:</B><DD><CODE>obj</CODE> - the entry to queue</DL></DD></DL><HR><A NAME="isEmpty()"><!-- --></A><H3>isEmpty</H3><PRE>boolean <B>isEmpty</B>()</PRE><DL><DD>is the queue empty?<P><DD><DL><DT><B>Returns:</B><DD><code>true</code> if the queue has no elements</DL></DD></DL><HR><A NAME="dequeue()"><!-- --></A><H3>dequeue</H3><PRE><A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A> <B>dequeue</B>() throws java.util.NoSuchElementException</PRE><DL><DD>remove an entry from the start of the queue<P><DD><DL><DT><B>Returns:</B><DD>the object<DT><B>Throws:</B><DD><CODE>java.util.NoSuchElementException</CODE></DL></DD></DL><HR><A NAME="length()"><!-- --></A><H3>length</H3><PRE>long <B>length</B>()</PRE><DL><DD>get the number of elements in the queue<P><DD><DL><DT><B>Returns:</B><DD>the number of elements in the queue</DL></DD></DL><HR><A NAME="release()"><!-- --></A><H3>release</H3><PRE>void <B>release</B>()</PRE><DL><DD>release any OS/IO resources associated with Queue<P><DD><DL></DL></DD></DL><HR><A NAME="peek()"><!-- --></A><H3>peek</H3><PRE><A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A> <B>peek</B>()</PRE><DL><DD>Give the top object in the queue, leaving it in place to be returned by future peek() or dequeue() invocations.<P><DD><DL><DT><B>Returns:</B><DD>top object, without removing it</DL></DD></DL><HR><A NAME="unpeek()"><!-- --></A><H3>unpeek</H3><PRE>void <B>unpeek</B>()</PRE><DL><DD>Releases queue from the obligation to return in the next peek()/dequeue() the same object as returned by any previous peek().<P><DD><DL></DL></DD></DL><HR><A NAME="getIterator(boolean)"><!-- --></A><H3>getIterator</H3><PRE>java.util.Iterator<<A HREF="../../../org/archive/queue/Queue.html" title="type parameter in Queue">T</A>> <B>getIterator</B>(boolean inCacheOnly)</PRE><DL><DD>Returns an iterator for the queue. <p> The returned iterator's <code>remove</code> method is considered unsafe. <p> Editing the queue while using the iterator is not safe.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>inCacheOnly</CODE> - <DT><B>Returns:</B><DD>an iterator for the queue</DL></DD></DL><HR><A NAME="deleteMatchedItems(org.apache.commons.collections.Predicate)"><!-- --></A><H3>deleteMatchedItems</H3><PRE>long <B>deleteMatchedItems</B>(org.apache.commons.collections.Predicate matcher)</PRE><DL><DD>All objects in the queue where <code>matcher.match(object)</code> returns true will be deleted from the queue. <p> Making other changes to the queue while this method is being processed is not safe.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>matcher</CODE> - a predicate<DT><B>Returns:</B><DD>the number of deleted items</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" 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_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Queue.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/archive/queue/MemQueue.html" title="class in org.archive.queue"><B>PREV CLASS</B></A> <A HREF="../../../org/archive/queue/QueueCat.html" title="class in org.archive.queue"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/archive/queue/Queue.html" target="_top"><B>FRAMES</B></A> <A HREF="Queue.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: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_bottom"></A><!-- ======== END OF BOTTOM NAVBAR ======= --><HR>Copyright © 2003-2007 Internet Archive. 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