2002-02-23 17:03:39 -05:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!-- ====================================================================== -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
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<title>Jakarta Lucene - Plan for enhancements to Lucene</title>
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</head>
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<body bgcolor="#ffffff" text="#000000" link="#525D76">
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<table border="0" width="100%" cellspacing="0">
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<!-- TOP IMAGE -->
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<tr>
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<td align="left">
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<a href="http://jakarta.apache.org"><img src="http://jakarta.apache.org/images/jakarta-logo.gif" border="0"/></a>
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</td>
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<td align="right">
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<a href="http://jakarta.apache.org/lucene/"><img src="./images/lucene_green_300.gif" alt="Jakarta Lucene" border="0"/></a>
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</td>
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</tr>
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</table>
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<table border="0" width="100%" cellspacing="4">
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<tr><td colspan="2">
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<hr noshade="" size="1"/>
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</td></tr>
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<tr>
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<!-- LEFT SIDE NAVIGATION -->
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<td width="20%" valign="top" nowrap="true">
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<p><strong>About</strong></p>
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<ul>
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<li> <a href="./index.html">Overview</a>
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</li>
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<li> <a href="./powered.html">Powered by Lucene</a>
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</li>
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<li> <a href="./whoweare.html">Who We Are</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/mail.html">Mailing Lists</a>
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</li>
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</ul>
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<p><strong>Resources</strong></p>
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<ul>
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2002-03-19 20:26:08 -05:00
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<li> <a href="http://lucene.sourceforge.net/cgi-bin/faq/faqmanager.cgi">FAQ (Official)</a>
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</li>
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<li> <a href="http://www.jguru.com/faq/Lucene">JGuru FAQ</a>
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2002-06-20 10:23:48 -04:00
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</li>
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<li> <a href="./gettingstarted.html">Getting Started</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/bugs.html">Bugs</a>
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</li>
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<li> <a href="http://nagoya.apache.org/bugzilla/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&email1=&emailtype1=substring&emailassigned_to1=1&email2=&emailtype2=substring&emailreporter2=1&bugidtype=include&bug_id=&changedin=&votes=&chfieldfrom=&chfieldto=Now&chfieldvalue=&product=Lucene&short_desc=&short_desc_type=allwordssubstr&long_desc=&long_desc_type=allwordssubstr&bug_file_loc=&bug_file_loc_type=allwordssubstr&keywords=&keywords_type=anywords&field0-0-0=noop&type0-0-0=noop&value0-0-0=&cmdtype=doit&order=%27Importance%27">Lucene Bugs</a>
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2002-05-16 01:16:10 -04:00
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</li>
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<li> <a href="./queryparsersyntax.html">Query Syntax</a>
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</li>
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<li> <a href="./api/index.html">Javadoc</a>
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</li>
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<li> <a href="./contributions.html">Contributions</a>
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</li>
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2002-09-17 08:17:57 -04:00
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<li> <a href="./lucene-sandbox/">Lucene Sandbox</a>
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</li>
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2002-07-14 15:04:00 -04:00
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<li> <a href="./resources.html">Articles, etc.</a>
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</li>
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</ul>
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<p><strong>Plans</strong></p>
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<ul>
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<li> <a href="./luceneplan.html">Application Extensions</a>
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</li>
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</ul>
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<p><strong>Download</strong></p>
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<ul>
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<li> <a href="http://jakarta.apache.org/site/binindex.html">Binaries</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/sourceindex.html">Source Code</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/cvsindex.html">CVS Repositories</a>
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</li>
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</ul>
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<p><strong>Jakarta</strong></p>
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<ul>
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<li> <a href="http://jakarta.apache.org/site/getinvolved.html">Get Involved</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/acknowledgements.html">Acknowledgements</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/contact.html">Contact</a>
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</li>
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<li> <a href="http://jakarta.apache.org/site/legal.html">Legal</a>
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</li>
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</ul>
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</td>
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<td width="80%" align="left" valign="top">
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<table border="0" cellspacing="0" cellpadding="2" width="100%">
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<tr><td bgcolor="#525D76">
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<font color="#ffffff" face="arial,helvetica,sanserif">
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<a name="Purpose"><strong>Purpose</strong></a>
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</font>
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</td></tr>
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<tr><td>
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<blockquote>
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<p>
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The purpose of this document is to outline plans for
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making <a href="http://jakarta.apache.org/lucene">
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Jakarta Lucene</a> work as a more general drop-in
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component. It makes the assumption that this is an
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objective for the Lucene user and development community.
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</p>
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<p>
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The best reference is <a href="http://www.htdig.org">
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htDig</a>, though it is not quite as sophisticated as
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Lucene, it has a number of features that make it
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desirable. It however is a traditional c-compiled app
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which makes it somewhat unpleasant to install on some
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platforms (like Solaris!).
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</p>
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<p>
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This plan is being submitted to the Lucene developer
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community for an initial reaction, advice, feedback and
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consent. Following this it will be submitted to the
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Lucene user community for support. Although, I'm (Andy
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Oliver) capable of providing these enhancements by
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myself, I'd of course prefer to work on them in concert
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with others.
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</p>
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<p>
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While I'm outlaying a fairly large feature set, these can
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be implemented incrementally of course (and are probably
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best if done that way).
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</p>
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</blockquote>
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</p>
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</td></tr>
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<tr><td><br/></td></tr>
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</table>
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<table border="0" cellspacing="0" cellpadding="2" width="100%">
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<tr><td bgcolor="#525D76">
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<font color="#ffffff" face="arial,helvetica,sanserif">
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<a name="Goal and Objectives"><strong>Goal and Objectives</strong></a>
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</font>
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</td></tr>
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<tr><td>
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<blockquote>
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<p>
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The goal is to provide features to Lucene that allow it
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to be used as a drop-in search engine. It should provide
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many of the features of projects like <a href="http://www.htdig.org">htDig</a> while surpassing
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them with unique Lucene features and capabilities such as
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easy installation on and java-supporting platform,
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and support for document fields and field searches. And
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of course, <a href="http://apache.org/LICENSE">
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a pragmatic software license</a>.
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</p>
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<p>
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To reach this goal we'll implement code to support the
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following objectives that augment but do not replace
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the current Lucene feature set.
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</p>
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<ul>
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<li>
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Document Location Independence - meaning mapping
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real contexts to runtime contexts.
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Essentially, if the document is at
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/var/www/htdocs/mydoc.html, I probably want it
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indexed as
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http://www.bigevilmegacorp.com/mydoc.html.
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</li>
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<li>
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Standard methods of creating central indicies -
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file system indexing is probably less useful in
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many environments than is *remote* indexing (for
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instance http). I would suggest that most folks
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would prefer that general functionality be
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supported by Lucene instead of having to write
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code for every indexing project. Obviously, if
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what they are doing is *special* they'll have to
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code, but general document indexing across
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web servers would not qualify.
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</li>
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<li>
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Document interpretation abstraction - currently
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one must handle document object construction via
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custom code. A standard interface for plugging
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in format handlers should be supported.
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</li>
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<li>
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Mime and file-extension to document
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interpretation mapping.
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</li>
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</ul>
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</blockquote>
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</p>
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</td></tr>
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<tr><td><br/></td></tr>
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</table>
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<table border="0" cellspacing="0" cellpadding="2" width="100%">
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<tr><td bgcolor="#525D76">
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<font color="#ffffff" face="arial,helvetica,sanserif">
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<a name="Crawlers"><strong>Crawlers</strong></a>
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</font>
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</td></tr>
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<tr><td>
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<blockquote>
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<p>
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Crawlers are data source executable code. They crawl a file
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system, ftp site, web site, etc. to create the index.
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These standard crawlers may not make ALL of Lucene's
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functionality available, though they should be able to
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make most of it available through configuration.
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</p>
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<p>
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<b> Abstract Crawler </b>
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</p>
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<p>
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The AbstractCrawler is basically the parent for all
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Crawler classes. It provides implementation for the
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following functions/properties:
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</p>
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<ul>
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<li>
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index path - where to write the index.
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</li>
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<li>
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cui - create or update the index
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</li>
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<li>
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root context - the start of the pathname
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that should be replaced by the
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replace with property or dropped
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entirely. Example: /opt/tomcat/webapps
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</li>
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<li>
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replace with - when specified replaces
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the root context. Example:
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http://jakarta.apache.org.
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</li>
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<li>
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replacement type - the type of
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replace with path: relative, URL or
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path.
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</li>
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<li>
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location - the location to start
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indexing at.
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</li>
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<li>
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doctypes - only index documents with
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these doctypes. If not specified all
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registered mime-types are used.
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Example: "xml,doc,html"
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</li>
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<li>
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recursive - if not specified is turned
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off.
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</li>
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<li>
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level - optional level of directory or
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links to traverse. By default is
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assumed to be infinite. Recursive must
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be turned on or this is ignored. Range:
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0 - Long.MAX_VALUE.
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</li>
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<li>
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SleeptimeBetweenCalls - can be used to
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avoid flooding a machine with too many
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requests
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</li>
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<li>
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RequestTimeout - kill the crawler
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request after the specified period of
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inactivity.
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</li>
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<li>
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IncludeFilter - include only items
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matching filter. (can occur multiple
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times)
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</li>
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<li>
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2002-06-08 16:43:01 -04:00
|
|
|
ExcludeFilter - exclude only items
|
2002-02-24 10:58:41 -05:00
|
|
|
matching filter. (can occur multiple
|
|
|
|
|
times)
|
|
|
|
|
</li>
|
2002-02-24 11:33:21 -05:00
|
|
|
<li>
|
|
|
|
|
ExpandOnly - use but do not index items
|
|
|
|
|
that match this pattern (regex?) (can
|
|
|
|
|
occur multiple times)
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
NoExpand - Index but do not follow the
|
|
|
|
|
links in items that match this pattern
|
|
|
|
|
(regex?) (can occur multiple times)
|
|
|
|
|
</li>
|
2002-02-24 10:58:41 -05:00
|
|
|
<li>
|
|
|
|
|
MaxItems - stops indexing after x
|
|
|
|
|
documents have been indexed.
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
MaxMegs - stops indexing after x megs
|
|
|
|
|
have been indexed.. (should this be in
|
|
|
|
|
specific crawlers?)
|
|
|
|
|
</li>
|
2002-02-23 17:03:39 -05:00
|
|
|
<li>
|
|
|
|
|
properties - in addition to the settings
|
|
|
|
|
(probably from the command line) read
|
|
|
|
|
this properties file and get them from
|
|
|
|
|
it. Command line options override
|
2002-06-08 16:43:01 -04:00
|
|
|
the properties file in the case of
|
2002-02-23 17:03:39 -05:00
|
|
|
duplicates. There should also be an
|
2002-06-08 16:43:01 -04:00
|
|
|
environment variable or VM parameter to
|
2002-02-23 17:03:39 -05:00
|
|
|
set this.
|
|
|
|
|
</li>
|
|
|
|
|
</ul>
|
|
|
|
|
<p>
|
2002-02-24 10:58:41 -05:00
|
|
|
<b>FileSystemCrawler</b>
|
2002-02-23 17:03:39 -05:00
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-02-24 10:58:41 -05:00
|
|
|
This should extend the AbstractCrawler and
|
2002-06-08 16:43:01 -04:00
|
|
|
support any additional options required for a
|
|
|
|
|
file system index.
|
2002-02-23 17:03:39 -05:00
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-02-24 10:58:41 -05:00
|
|
|
<b>HTTP Crawler </b>
|
2002-02-23 17:03:39 -05:00
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
Supports the AbstractCrawler options as well as:
|
2002-02-23 17:03:39 -05:00
|
|
|
</p>
|
|
|
|
|
<ul>
|
|
|
|
|
<li>
|
2002-06-08 16:43:01 -04:00
|
|
|
span hosts - Whether to span hosts or not,
|
|
|
|
|
by default this should be no.
|
2002-02-23 17:03:39 -05:00
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
restrict domains - (ignored if span
|
|
|
|
|
hosts is not enabled). Whether all
|
|
|
|
|
spanned hosts must be in the same domain
|
|
|
|
|
(default is off).
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
try directories - Whether to attempt
|
|
|
|
|
directory listings or not (so if you
|
|
|
|
|
recurse and go to
|
|
|
|
|
/nextcontext/index.html this option says
|
|
|
|
|
to also try /nextcontext to get the dir
|
2002-06-08 16:43:01 -04:00
|
|
|
listing)
|
2002-02-23 17:03:39 -05:00
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
map extensions -
|
2002-06-08 16:43:01 -04:00
|
|
|
(always/default/never/fallback). Whether
|
2002-02-23 17:03:39 -05:00
|
|
|
to always use extension mapping, by
|
|
|
|
|
default (fallback to mime type), NEVER
|
|
|
|
|
or fallback if mime is not available
|
|
|
|
|
(default).
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
ignore robots - ignore robots.txt, on or
|
|
|
|
|
off (default - off)
|
|
|
|
|
</li>
|
|
|
|
|
</ul>
|
|
|
|
|
</blockquote>
|
|
|
|
|
</p>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td><br/></td></tr>
|
|
|
|
|
</table>
|
|
|
|
|
<table border="0" cellspacing="0" cellpadding="2" width="100%">
|
|
|
|
|
<tr><td bgcolor="#525D76">
|
|
|
|
|
<font color="#ffffff" face="arial,helvetica,sanserif">
|
|
|
|
|
<a name="MIMEMap"><strong>MIMEMap</strong></a>
|
|
|
|
|
</font>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td>
|
|
|
|
|
<blockquote>
|
|
|
|
|
<p>
|
|
|
|
|
A configurable registry of document types, their
|
2002-06-08 16:43:01 -04:00
|
|
|
description, an identifier, mime-type and file
|
|
|
|
|
extension. This should map both MIME -> factory
|
2002-02-23 17:03:39 -05:00
|
|
|
and extension -> factory.
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
|
|
|
|
This might be configured at compile time or by a
|
|
|
|
|
properties file, etc. For example:
|
|
|
|
|
</p>
|
|
|
|
|
<table>
|
|
|
|
|
<tr>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
Description
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
Identifier
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
Extensions
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
MimeType
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
DocumentFactory
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
</tr>
|
|
|
|
|
<tr>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"Word Document"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"doc"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"doc"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"vnd.application/ms-word"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
POIWordDocumentFactory
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
</tr>
|
|
|
|
|
<tr>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"HTML Document"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"html"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
"html,htm"
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
<td bgcolor="#a0ddf0" colspan="" rowspan="" valign="top" align="left">
|
|
|
|
|
<font color="#000000" size="-1" face="arial,helvetica,sanserif">
|
|
|
|
|
HTMLDocumentFactory
|
|
|
|
|
</font>
|
|
|
|
|
</td>
|
|
|
|
|
</tr>
|
|
|
|
|
</table>
|
|
|
|
|
</blockquote>
|
|
|
|
|
</p>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td><br/></td></tr>
|
|
|
|
|
</table>
|
|
|
|
|
<table border="0" cellspacing="0" cellpadding="2" width="100%">
|
|
|
|
|
<tr><td bgcolor="#525D76">
|
|
|
|
|
<font color="#ffffff" face="arial,helvetica,sanserif">
|
|
|
|
|
<a name="DocumentFactory"><strong>DocumentFactory</strong></a>
|
|
|
|
|
</font>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td>
|
|
|
|
|
<blockquote>
|
|
|
|
|
<p>
|
|
|
|
|
An interface for classes which create document objects
|
|
|
|
|
for particular file types. Examples:
|
|
|
|
|
HTMLDocumentFactory, DOCDocumentFactory,
|
|
|
|
|
XLSDocumentFactory, XML DocumentFactory.
|
|
|
|
|
</p>
|
|
|
|
|
</blockquote>
|
|
|
|
|
</p>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td><br/></td></tr>
|
|
|
|
|
</table>
|
|
|
|
|
<table border="0" cellspacing="0" cellpadding="2" width="100%">
|
|
|
|
|
<tr><td bgcolor="#525D76">
|
|
|
|
|
<font color="#ffffff" face="arial,helvetica,sanserif">
|
|
|
|
|
<a name="FieldMapping classes"><strong>FieldMapping classes</strong></a>
|
|
|
|
|
</font>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td>
|
|
|
|
|
<blockquote>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
A class that maps standard fields from the
|
2002-02-23 17:03:39 -05:00
|
|
|
DocumentFactories into *fields* in the Document objects
|
|
|
|
|
they create. I suggest that a regular expression system
|
|
|
|
|
or xpath might be the most universal way to do this.
|
|
|
|
|
For instance if perhaps I had an XML factory that
|
|
|
|
|
represented XML elements as fields, I could map content
|
2002-06-08 16:43:01 -04:00
|
|
|
from particular fields to their fields or suppress them
|
2002-02-23 17:03:39 -05:00
|
|
|
entirely. We could even make this configurable.
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
|
2002-02-23 17:03:39 -05:00
|
|
|
for example:
|
|
|
|
|
</p>
|
|
|
|
|
<ul>
|
|
|
|
|
<li>
|
|
|
|
|
htmldoc.properties
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
suppress=*
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
author=content:g/author\:\ ........................................./
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
author.suppress=false
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
title=content:g/title\:\ ........................................./
|
|
|
|
|
</li>
|
|
|
|
|
<li>
|
|
|
|
|
title.suppress=false
|
|
|
|
|
</li>
|
|
|
|
|
</ul>
|
2002-06-08 16:43:01 -04:00
|
|
|
<p>
|
|
|
|
|
In this example we map html documents such that all
|
|
|
|
|
fields are suppressed but author and title. We map
|
|
|
|
|
author and title to anything in the content matching
|
|
|
|
|
author: (and x characters). Okay my regular expresions
|
2002-02-23 17:03:39 -05:00
|
|
|
suck but hopefully you get the idea.
|
|
|
|
|
</p>
|
|
|
|
|
</blockquote>
|
|
|
|
|
</p>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td><br/></td></tr>
|
|
|
|
|
</table>
|
|
|
|
|
<table border="0" cellspacing="0" cellpadding="2" width="100%">
|
|
|
|
|
<tr><td bgcolor="#525D76">
|
|
|
|
|
<font color="#ffffff" face="arial,helvetica,sanserif">
|
|
|
|
|
<a name="Final Thoughts"><strong>Final Thoughts</strong></a>
|
|
|
|
|
</font>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td>
|
|
|
|
|
<blockquote>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
We might also consider eliminating the DocumentFactory
|
|
|
|
|
entirely by making an AbstractDocument from which the
|
|
|
|
|
current document object would inherit from. I
|
|
|
|
|
experimented with this locally, and it was a relatively
|
|
|
|
|
minor code change and there was of course no difference
|
|
|
|
|
in performance. The Document Factory classes would
|
|
|
|
|
instead be instances of various subclasses of
|
2002-02-23 17:03:39 -05:00
|
|
|
AbstractDocument.
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
My inspiration for this is HTDig (http://www.htdig.org/).
|
|
|
|
|
While this goes slightly beyond what HTDig provides by
|
|
|
|
|
providing field mapping (where HTDIG is just interested
|
|
|
|
|
in Strings/numbers wherever they are found), it provides
|
|
|
|
|
at least what I would need to use this as a drop-in for
|
|
|
|
|
most places I contract at (with the obvious exception of
|
|
|
|
|
a default set of content handlers which would of course
|
2002-02-23 17:03:39 -05:00
|
|
|
develop naturally over time).
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
I am able to certainly contribute to this effort if the
|
|
|
|
|
development community is open to it. I'd suggest we do
|
|
|
|
|
it iteratively in stages and not aim for all of this at
|
2002-02-23 17:03:39 -05:00
|
|
|
once (for instance leave out the field mapping at first).
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
2002-06-08 16:43:01 -04:00
|
|
|
|
|
|
|
|
Anyhow, please give me some feedback, counter
|
|
|
|
|
suggestions, let me know if I'm way off base or out of
|
2002-02-23 17:03:39 -05:00
|
|
|
line, etc. -Andy
|
|
|
|
|
</p>
|
|
|
|
|
</blockquote>
|
|
|
|
|
</p>
|
|
|
|
|
</td></tr>
|
|
|
|
|
<tr><td><br/></td></tr>
|
|
|
|
|
</table>
|
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</td>
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</tr>
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<!-- FOOTER -->
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<tr><td colspan="2">
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<hr noshade="" size="1"/>
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</td></tr>
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<tr><td colspan="2">
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<div align="center"><font color="#525D76" size="-1"><em>
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Copyright © 1999-2002, Apache Software Foundation
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</em></font></div>
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</td></tr>
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</table>
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</body>
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</html>
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<!-- end the processing -->
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