📄 bloomfilter.html
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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_06) on Wed Sep 27 16:03:12 PDT 2006 --><TITLE>BloomFilter (Heritrix 1.10.1)</TITLE><META NAME="keywords" CONTENT="org.archive.util.BloomFilter interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="BloomFilter (Heritrix 1.10.1)";}</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/BloomFilter.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/util/BenchmarkBlooms.html" title="class in org.archive.util"><B>PREV CLASS</B></A> <A HREF="../../../org/archive/util/BloomFilter32bit.html" title="class in org.archive.util"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/archive/util/BloomFilter.html" target="_top"><B>FRAMES</B></A> <A HREF="BloomFilter.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.util</FONT><BR>Interface BloomFilter</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../org/archive/util/BloomFilter32bit.html" title="class in org.archive.util">BloomFilter32bit</A>, <A HREF="../../../org/archive/util/BloomFilter32bitSplit.html" title="class in org.archive.util">BloomFilter32bitSplit</A>, <A HREF="../../../org/archive/util/BloomFilter32bp2.html" title="class in org.archive.util">BloomFilter32bp2</A>, <A HREF="../../../org/archive/util/BloomFilter32bp2Split.html" title="class in org.archive.util">BloomFilter32bp2Split</A>, <A HREF="../../../org/archive/util/BloomFilter64bit.html" title="class in org.archive.util">BloomFilter64bit</A></DD></DL><HR><DL><DT><PRE>public interface <B>BloomFilter</B></DL></PRE><P>Common interface for different Bloom filter implementations<P><P><DL><DT><B>Author:</B></DT> <DD>Gordon Mohr</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> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/archive/util/BloomFilter.html#add(java.lang.CharSequence)">add</A></B>(java.lang.CharSequence s)</CODE><BR> Adds a character sequence to the filter.</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/util/BloomFilter.html#contains(java.lang.CharSequence)">contains</A></B>(java.lang.CharSequence s)</CODE><BR> Checks whether the given character sequence is in this filter.</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/util/BloomFilter.html#getSizeBytes()">getSizeBytes</A></B>()</CODE><BR> The amount of memory in bytes consumed by the bloom bitfield.</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/archive/util/BloomFilter.html#size()">size</A></B>()</CODE><BR> The number of character sequences in the filter.</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="size()"><!-- --></A><H3>size</H3><PRE>int <B>size</B>()</PRE><DL><DD>The number of character sequences in the filter.<P><DD><DL><DT><B>Returns:</B><DD>the number of character sequences in the filter (but see <A HREF="../../../org/archive/util/BloomFilter.html#contains(java.lang.CharSequence)"><CODE>contains(CharSequence)</CODE></A>).</DL></DD></DL><HR><A NAME="contains(java.lang.CharSequence)"><!-- --></A><H3>contains</H3><PRE>boolean <B>contains</B>(java.lang.CharSequence s)</PRE><DL><DD>Checks whether the given character sequence is in this filter. <P>Note that this method may return true on a character sequence that is has not been added to the filter. This will happen with probability 2<sub>-<var>d</var></sub>, where <var>d</var> is the number of hash functions specified at creation time, if the number of the elements in the filter is less than <var>n</var>, the number of expected elements specified at creation time.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>s</CODE> - a character sequence.<DT><B>Returns:</B><DD>true if the sequence is in the filter (or if a sequence with the same hash sequence is in the filter).</DL></DD></DL><HR><A NAME="add(java.lang.CharSequence)"><!-- --></A><H3>add</H3><PRE>boolean <B>add</B>(java.lang.CharSequence s)</PRE><DL><DD>Adds a character sequence to the filter.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>s</CODE> - a character sequence.<DT><B>Returns:</B><DD>true if the character sequence was not in the filter (but see <A HREF="../../../org/archive/util/BloomFilter.html#contains(java.lang.CharSequence)"><CODE>contains(CharSequence)</CODE></A>).</DL></DD></DL><HR><A NAME="getSizeBytes()"><!-- --></A><H3>getSizeBytes</H3><PRE>long <B>getSizeBytes</B>()</PRE><DL><DD>The amount of memory in bytes consumed by the bloom bitfield.<P><DD><DL><DT><B>Returns:</B><DD>memory used by bloom bitfield, in bytes</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/BloomFilter.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/util/BenchmarkBlooms.html" title="class in org.archive.util"><B>PREV CLASS</B></A> <A HREF="../../../org/archive/util/BloomFilter32bit.html" title="class in org.archive.util"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/archive/util/BloomFilter.html" target="_top"><B>FRAMES</B></A> <A HREF="BloomFilter.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 © 2003-2006 Internet Archive. 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