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Database (estraier)
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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estraier</FONT>
<BR>
Class Database</H2>
<PRE>
java.lang.Object
<IMG SRC="../resources/inherit.gif" ALT="extended by"><B>estraier.Database</B>
</PRE>
<HR>
<DL>
<DT>public class <B>Database</B><DT>extends java.lang.Object</DL>
<P>
Abstraction of database
<P>
<P>
<HR>
<P>
<!-- ======== NESTED CLASS SUMMARY ======== -->
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<B>Field Summary</B></FONT></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBCHRCAT">DBCHRCAT</A></B></CODE>
<BR>
open mode: use character category analyzer</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBCREAT">DBCREAT</A></B></CODE>
<BR>
open mode: a writer creating</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBHUGE">DBHUGE</A></B></CODE>
<BR>
open mode: huge tuning</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBHUGE2">DBHUGE2</A></B></CODE>
<BR>
open mode: huge tuning second</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBHUGE3">DBHUGE3</A></B></CODE>
<BR>
open mode: huge tuning third</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBLARGE">DBLARGE</A></B></CODE>
<BR>
open mode: large tuning</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBLCKNB">DBLCKNB</A></B></CODE>
<BR>
open mode: lock without blocking</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBNOLCK">DBNOLCK</A></B></CODE>
<BR>
open mode: open without locking</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBPERFNG">DBPERFNG</A></B></CODE>
<BR>
open mode: use perfect N-gram analyzer</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBREADER">DBREADER</A></B></CODE>
<BR>
open mode: open as a reader</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBSCASIS">DBSCASIS</A></B></CODE>
<BR>
open mode: refrain from adjustment of scores</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBSCINT">DBSCINT</A></B></CODE>
<BR>
open mode: store scores as integer</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBSCVOID">DBSCVOID</A></B></CODE>
<BR>
open mode: store scores as void</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBSMALL">DBSMALL</A></B></CODE>
<BR>
open mode: small tuning</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBTRUNC">DBTRUNC</A></B></CODE>
<BR>
open mode: a writer truncating</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#DBWRITER">DBWRITER</A></B></CODE>
<BR>
open mode: open as a writer</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRACCES">ERRACCES</A></B></CODE>
<BR>
error code: access forbidden</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRDB">ERRDB</A></B></CODE>
<BR>
error code: database problem</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRINVAL">ERRINVAL</A></B></CODE>
<BR>
error code: invalid argument</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRIO">ERRIO</A></B></CODE>
<BR>
error code: I/O problem</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRLOCK">ERRLOCK</A></B></CODE>
<BR>
error code: lock failure</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRMISC">ERRMISC</A></B></CODE>
<BR>
error code: miscellaneous</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRNOERR">ERRNOERR</A></B></CODE>
<BR>
error code: no error</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ERRNOITEM">ERRNOITEM</A></B></CODE>
<BR>
error code: no item</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#GDNOATTR">GDNOATTR</A></B></CODE>
<BR>
get_doc option: no attributes</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#GDNOKWD">GDNOKWD</A></B></CODE>
<BR>
get_doc option: no keywords</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#GDNOTEXT">GDNOTEXT</A></B></CODE>
<BR>
get_doc option: no text</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#IDXATTRNUM">IDXATTRNUM</A></B></CODE>
<BR>
attribute index type: for narrowing with attributes as numbers</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#IDXATTRSEQ">IDXATTRSEQ</A></B></CODE>
<BR>
attribute index type: for multipurpose sequencial access method</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#IDXATTRSTR">IDXATTRSTR</A></B></CODE>
<BR>
attribute index type: for narrowing with attributes as strings</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#MGCLEAN">MGCLEAN</A></B></CODE>
<BR>
merge option: clean up dispensable regions</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#ODCLEAN">ODCLEAN</A></B></CODE>
<BR>
out_doc option: clean up dispensable regions</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#OPTNODBOPT">OPTNODBOPT</A></B></CODE>
<BR>
optimize option: omit optimization of the database files</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#OPTNOPURGE">OPTNOPURGE</A></B></CODE>
<BR>
optimize option: omit purging dispensable region of deleted</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#PDCLEAN">PDCLEAN</A></B></CODE>
<BR>
put_doc option: clean up dispensable regions</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#PDWEIGHT">PDWEIGHT</A></B></CODE>
<BR>
put_doc option: weight scores statically when indexing</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#VERSION">VERSION</A></B></CODE>
<BR>
version of Hyper Estraier</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">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Constructor Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../estraier/Database.html#Database()">Database</A></B>()</CODE>
<BR>
Create a database object.</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">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Method Summary</B></FONT></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="../estraier/Database.html#add_attr_index(java.lang.String, int)">add_attr_index</A></B>(java.lang.String name,
int type)</CODE>
<BR>
Add an index for narrowing or sorting with document attributes.</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="../estraier/Database.html#add_pseudo_index(java.lang.String)">add_pseudo_index</A></B>(java.lang.String path)</CODE>
<BR>
Add a pseudo index directory.</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="../estraier/Database.html#close()">close</A></B>()</CODE>
<BR>
Close the database.</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="../estraier/Database.html#doc_num()">doc_num</A></B>()</CODE>
<BR>
Get the number of documents.</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="../estraier/Database.html#edit_doc(estraier.Document)">edit_doc</A></B>(<A HREF="../estraier/Document.html" title="class in estraier">Document</A> doc)</CODE>
<BR>
Edit attributes of a document.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#err_msg(int)">err_msg</A></B>(int ecode)</CODE>
<BR>
Get the string of an error code.</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="../estraier/Database.html#error()">error</A></B>()</CODE>
<BR>
Get the last happened error code.</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="../estraier/Database.html#fatal()">fatal</A></B>()</CODE>
<BR>
Check whether the database has a fatal error.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#finalize()">finalize</A></B>()</CODE>
<BR>
Release resources.</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="../estraier/Database.html#flush(int)">flush</A></B>(int max)</CODE>
<BR>
Flush index words in the cache.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#get_doc_attr(int, java.lang.String)">get_doc_attr</A></B>(int id,
java.lang.String name)</CODE>
<BR>
Retrieve the value of an attribute of a document.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../estraier/Document.html" title="class in estraier">Document</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#get_doc(int, int)">get_doc</A></B>(int id,
int options)</CODE>
<BR>
Retrieve a document.</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="../estraier/Database.html#merge(java.lang.String, int)">merge</A></B>(java.lang.String name,
int options)</CODE>
<BR>
Merge another database.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#name()">name</A></B>()</CODE>
<BR>
Get the name.</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="../estraier/Database.html#open(java.lang.String, int)">open</A></B>(java.lang.String name,
int omode)</CODE>
<BR>
Open the database.</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="../estraier/Database.html#optimize(int)">optimize</A></B>(int options)</CODE>
<BR>
Optimize the database.</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="../estraier/Database.html#out_doc(int, int)">out_doc</A></B>(int id,
int options)</CODE>
<BR>
Remove a document.</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="../estraier/Database.html#put_doc(estraier.Document, int)">put_doc</A></B>(<A HREF="../estraier/Document.html" title="class in estraier">Document</A> doc,
int options)</CODE>
<BR>
Add a document.</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="../estraier/Database.html#scan_doc(estraier.Document, estraier.Condition)">scan_doc</A></B>(<A HREF="../estraier/Document.html" title="class in estraier">Document</A> doc,
<A HREF="../estraier/Condition.html" title="class in estraier">Condition</A> cond)</CODE>
<BR>
Check whether a document object matches the phrase of a search condition object definitely.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../estraier/Result.html" title="class in estraier">Result</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#search_meta(estraier.Database[], estraier.Condition)">search_meta</A></B>(<A HREF="../estraier/Database.html" title="class in estraier">Database</A>[] dbs,
<A HREF="../estraier/Condition.html" title="class in estraier">Condition</A> cond)</CODE>
<BR>
Search plural databases for documents corresponding a condition.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../estraier/Result.html" title="class in estraier">Result</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#search(estraier.Condition)">search</A></B>(<A HREF="../estraier/Condition.html" title="class in estraier">Condition</A> cond)</CODE>
<BR>
Search for documents corresponding a condition.</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="../estraier/Database.html#set_cache_size(double, int, int, int)">set_cache_size</A></B>(double size,
int anum,
int tnum,
int rnum)</CODE>
<BR>
Set the maximum size of the cache memory.</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="../estraier/Database.html#set_informer(estraier.DatabaseInformer)">set_informer</A></B>(<A HREF="../estraier/DatabaseInformer.html" title="interface in estraier">DatabaseInformer</A> informer)</CODE>
<BR>
Set the callback function to inform of database events.</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="../estraier/Database.html#set_wildmax(int)">set_wildmax</A></B>(int num)</CODE>
<BR>
Set the maximum number of expansion of wild cards.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../estraier/Database.html#size()">size</A></B>()</CODE>
<BR>
Get the size.</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="../estraier/Database.html#sync()">sync</A></B>()</CODE>
<BR>
Synchronize updating contents.</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="../estraier/Database.html#uri_to_id(java.lang.String)">uri_to_id</A></B>(java.lang.String uri)</CODE>
<BR>
Get the ID of a document specified by URI.</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="../estraier/Database.html#word_num()">word_num</A></B>()</CODE>
<BR>
Get the number of unique words.</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">
<TD><B>Methods inherited from class java.lang.Object</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Field Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="DBCHRCAT"><!-- --></A><H3>
DBCHRCAT</H3>
<PRE>
public static final int <B>DBCHRCAT</B></PRE>
<DL>
<DD>open mode: use character category analyzer
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBCHRCAT">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBCREAT"><!-- --></A><H3>
DBCREAT</H3>
<PRE>
public static final int <B>DBCREAT</B></PRE>
<DL>
<DD>open mode: a writer creating
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBCREAT">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBHUGE"><!-- --></A><H3>
DBHUGE</H3>
<PRE>
public static final int <B>DBHUGE</B></PRE>
<DL>
<DD>open mode: huge tuning
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBHUGE">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBHUGE2"><!-- --></A><H3>
DBHUGE2</H3>
<PRE>
public static final int <B>DBHUGE2</B></PRE>
<DL>
<DD>open mode: huge tuning second
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBHUGE2">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBHUGE3"><!-- --></A><H3>
DBHUGE3</H3>
<PRE>
public static final int <B>DBHUGE3</B></PRE>
<DL>
<DD>open mode: huge tuning third
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBHUGE3">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBLARGE"><!-- --></A><H3>
DBLARGE</H3>
<PRE>
public static final int <B>DBLARGE</B></PRE>
<DL>
<DD>open mode: large tuning
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBLARGE">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBLCKNB"><!-- --></A><H3>
DBLCKNB</H3>
<PRE>
public static final int <B>DBLCKNB</B></PRE>
<DL>
<DD>open mode: lock without blocking
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBLCKNB">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBNOLCK"><!-- --></A><H3>
DBNOLCK</H3>
<PRE>
public static final int <B>DBNOLCK</B></PRE>
<DL>
<DD>open mode: open without locking
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBNOLCK">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBPERFNG"><!-- --></A><H3>
DBPERFNG</H3>
<PRE>
public static final int <B>DBPERFNG</B></PRE>
<DL>
<DD>open mode: use perfect N-gram analyzer
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBPERFNG">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBREADER"><!-- --></A><H3>
DBREADER</H3>
<PRE>
public static final int <B>DBREADER</B></PRE>
<DL>
<DD>open mode: open as a reader
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBREADER">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBSCASIS"><!-- --></A><H3>
DBSCASIS</H3>
<PRE>
public static final int <B>DBSCASIS</B></PRE>
<DL>
<DD>open mode: refrain from adjustment of scores
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBSCASIS">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBSCINT"><!-- --></A><H3>
DBSCINT</H3>
<PRE>
public static final int <B>DBSCINT</B></PRE>
<DL>
<DD>open mode: store scores as integer
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBSCINT">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBSCVOID"><!-- --></A><H3>
DBSCVOID</H3>
<PRE>
public static final int <B>DBSCVOID</B></PRE>
<DL>
<DD>open mode: store scores as void
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBSCVOID">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBSMALL"><!-- --></A><H3>
DBSMALL</H3>
<PRE>
public static final int <B>DBSMALL</B></PRE>
<DL>
<DD>open mode: small tuning
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBSMALL">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBTRUNC"><!-- --></A><H3>
DBTRUNC</H3>
<PRE>
public static final int <B>DBTRUNC</B></PRE>
<DL>
<DD>open mode: a writer truncating
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBTRUNC">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="DBWRITER"><!-- --></A><H3>
DBWRITER</H3>
<PRE>
public static final int <B>DBWRITER</B></PRE>
<DL>
<DD>open mode: open as a writer
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.DBWRITER">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRACCES"><!-- --></A><H3>
ERRACCES</H3>
<PRE>
public static final int <B>ERRACCES</B></PRE>
<DL>
<DD>error code: access forbidden
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRACCES">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRDB"><!-- --></A><H3>
ERRDB</H3>
<PRE>
public static final int <B>ERRDB</B></PRE>
<DL>
<DD>error code: database problem
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRDB">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRINVAL"><!-- --></A><H3>
ERRINVAL</H3>
<PRE>
public static final int <B>ERRINVAL</B></PRE>
<DL>
<DD>error code: invalid argument
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRINVAL">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRIO"><!-- --></A><H3>
ERRIO</H3>
<PRE>
public static final int <B>ERRIO</B></PRE>
<DL>
<DD>error code: I/O problem
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRIO">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRLOCK"><!-- --></A><H3>
ERRLOCK</H3>
<PRE>
public static final int <B>ERRLOCK</B></PRE>
<DL>
<DD>error code: lock failure
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRLOCK">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRMISC"><!-- --></A><H3>
ERRMISC</H3>
<PRE>
public static final int <B>ERRMISC</B></PRE>
<DL>
<DD>error code: miscellaneous
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRMISC">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRNOERR"><!-- --></A><H3>
ERRNOERR</H3>
<PRE>
public static final int <B>ERRNOERR</B></PRE>
<DL>
<DD>error code: no error
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRNOERR">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ERRNOITEM"><!-- --></A><H3>
ERRNOITEM</H3>
<PRE>
public static final int <B>ERRNOITEM</B></PRE>
<DL>
<DD>error code: no item
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ERRNOITEM">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="GDNOATTR"><!-- --></A><H3>
GDNOATTR</H3>
<PRE>
public static final int <B>GDNOATTR</B></PRE>
<DL>
<DD>get_doc option: no attributes
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.GDNOATTR">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="GDNOKWD"><!-- --></A><H3>
GDNOKWD</H3>
<PRE>
public static final int <B>GDNOKWD</B></PRE>
<DL>
<DD>get_doc option: no keywords
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.GDNOKWD">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="GDNOTEXT"><!-- --></A><H3>
GDNOTEXT</H3>
<PRE>
public static final int <B>GDNOTEXT</B></PRE>
<DL>
<DD>get_doc option: no text
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.GDNOTEXT">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="IDXATTRNUM"><!-- --></A><H3>
IDXATTRNUM</H3>
<PRE>
public static final int <B>IDXATTRNUM</B></PRE>
<DL>
<DD>attribute index type: for narrowing with attributes as numbers
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.IDXATTRNUM">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="IDXATTRSEQ"><!-- --></A><H3>
IDXATTRSEQ</H3>
<PRE>
public static final int <B>IDXATTRSEQ</B></PRE>
<DL>
<DD>attribute index type: for multipurpose sequencial access method
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.IDXATTRSEQ">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="IDXATTRSTR"><!-- --></A><H3>
IDXATTRSTR</H3>
<PRE>
public static final int <B>IDXATTRSTR</B></PRE>
<DL>
<DD>attribute index type: for narrowing with attributes as strings
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.IDXATTRSTR">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="MGCLEAN"><!-- --></A><H3>
MGCLEAN</H3>
<PRE>
public static final int <B>MGCLEAN</B></PRE>
<DL>
<DD>merge option: clean up dispensable regions
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.MGCLEAN">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="ODCLEAN"><!-- --></A><H3>
ODCLEAN</H3>
<PRE>
public static final int <B>ODCLEAN</B></PRE>
<DL>
<DD>out_doc option: clean up dispensable regions
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.ODCLEAN">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="OPTNODBOPT"><!-- --></A><H3>
OPTNODBOPT</H3>
<PRE>
public static final int <B>OPTNODBOPT</B></PRE>
<DL>
<DD>optimize option: omit optimization of the database files
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.OPTNODBOPT">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="OPTNOPURGE"><!-- --></A><H3>
OPTNOPURGE</H3>
<PRE>
public static final int <B>OPTNOPURGE</B></PRE>
<DL>
<DD>optimize option: omit purging dispensable region of deleted
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.OPTNOPURGE">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="PDCLEAN"><!-- --></A><H3>
PDCLEAN</H3>
<PRE>
public static final int <B>PDCLEAN</B></PRE>
<DL>
<DD>put_doc option: clean up dispensable regions
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.PDCLEAN">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="PDWEIGHT"><!-- --></A><H3>
PDWEIGHT</H3>
<PRE>
public static final int <B>PDWEIGHT</B></PRE>
<DL>
<DD>put_doc option: weight scores statically when indexing
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../constant-values.html#estraier.Database.PDWEIGHT">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="VERSION"><!-- --></A><H3>
VERSION</H3>
<PRE>
public static final java.lang.String <B>VERSION</B></PRE>
<DL>
<DD>version of Hyper Estraier
<P>
<DL>
</DL>
</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="Database()"><!-- --></A><H3>
Database</H3>
<PRE>
public <B>Database</B>()</PRE>
<DL>
<DD>Create a database object.
<P>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="add_attr_index(java.lang.String, int)"><!-- --></A><H3>
add_attr_index</H3>
<PRE>
public boolean <B>add_attr_index</B>(java.lang.String name,
int type)</PRE>
<DL>
<DD>Add an index for narrowing or sorting with document attributes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of an attribute.<DD><CODE>type</CODE> - the data type of attribute index; `Database.IDXATTRSEQ' for multipurpose
sequencial access method, `Database.IDXATTRSTR' for narrowing with attributes as strings,
`Database.IDXATTRNUM' for narrowing with attributes as numbers.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="add_pseudo_index(java.lang.String)"><!-- --></A><H3>
add_pseudo_index</H3>
<PRE>
public boolean <B>add_pseudo_index</B>(java.lang.String path)</PRE>
<DL>
<DD>Add a pseudo index directory.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>path</CODE> - the path of a pseudo index directory.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public boolean <B>close</B>()</PRE>
<DL>
<DD>Close the database.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="doc_num()"><!-- --></A><H3>
doc_num</H3>
<PRE>
public int <B>doc_num</B>()</PRE>
<DL>
<DD>Get the number of documents.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the number of documents in the database.</DL>
</DD>
</DL>
<HR>
<A NAME="edit_doc(estraier.Document)"><!-- --></A><H3>
edit_doc</H3>
<PRE>
public boolean <B>edit_doc</B>(<A HREF="../estraier/Document.html" title="class in estraier">Document</A> doc)</PRE>
<DL>
<DD>Edit attributes of a document.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>doc</CODE> - a document object.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="err_msg(int)"><!-- --></A><H3>
err_msg</H3>
<PRE>
public java.lang.String <B>err_msg</B>(int ecode)</PRE>
<DL>
<DD>Get the string of an error code.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ecode</CODE> - an error code.
<DT><B>Returns:</B><DD>the string of the error code.</DL>
</DD>
</DL>
<HR>
<A NAME="error()"><!-- --></A><H3>
error</H3>
<PRE>
public int <B>error</B>()</PRE>
<DL>
<DD>Get the last happened error code.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the last happened error code.</DL>
</DD>
</DL>
<HR>
<A NAME="fatal()"><!-- --></A><H3>
fatal</H3>
<PRE>
public boolean <B>fatal</B>()</PRE>
<DL>
<DD>Check whether the database has a fatal error.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if the database has fatal erroor, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="finalize()"><!-- --></A><H3>
finalize</H3>
<PRE>
protected void <B>finalize</B>()</PRE>
<DL>
<DD>Release resources.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="flush(int)"><!-- --></A><H3>
flush</H3>
<PRE>
public boolean <B>flush</B>(int max)</PRE>
<DL>
<DD>Flush index words in the cache.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>max</CODE> - the maximum number of words to be flushed. If it not more than zero, all words
are flushed.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="get_doc_attr(int, java.lang.String)"><!-- --></A><H3>
get_doc_attr</H3>
<PRE>
public java.lang.String <B>get_doc_attr</B>(int id,
java.lang.String name)</PRE>
<DL>
<DD>Retrieve the value of an attribute of a document.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - the ID number of a registered document.<DD><CODE>name</CODE> - the name of an attribute.
<DT><B>Returns:</B><DD>the value of the attribute or `null' if it does not exist.</DL>
</DD>
</DL>
<HR>
<A NAME="get_doc(int, int)"><!-- --></A><H3>
get_doc</H3>
<PRE>
public <A HREF="../estraier/Document.html" title="class in estraier">Document</A> <B>get_doc</B>(int id,
int options)</PRE>
<DL>
<DD>Retrieve a document.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - the ID number of a registered document.<DD><CODE>options</CODE> - options: `Database.GDNOATTR' to ignore attributes, `Database.GDNOTEXT' to
ignore the body text, `Database.GDNOKWD' to ignore keywords. The three can be specified at
# the same time by bitwise or.
<DT><B>Returns:</B><DD>a document object. On error, `null' is returned.</DL>
</DD>
</DL>
<HR>
<A NAME="merge(java.lang.String, int)"><!-- --></A><H3>
merge</H3>
<PRE>
public boolean <B>merge</B>(java.lang.String name,
int options)</PRE>
<DL>
<DD>Merge another database.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of another database directory.<DD><CODE>options</CODE> - options: `Database.MGCLEAN' to clean up dispensable regions of the deleted
document.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="name()"><!-- --></A><H3>
name</H3>
<PRE>
public java.lang.String <B>name</B>()</PRE>
<DL>
<DD>Get the name.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the name of the database.</DL>
</DD>
</DL>
<HR>
<A NAME="open(java.lang.String, int)"><!-- --></A><H3>
open</H3>
<PRE>
public boolean <B>open</B>(java.lang.String name,
int omode)</PRE>
<DL>
<DD>Open the database.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of a database directory.<DD><CODE>omode</CODE> - open modes: `Database.DBWRITER' as a writer, `Database.DBREADER' as a reader.
If the mode is `Database.DBWRITER', the following may be added by bitwise or:
`Database.DBCREAT', which means it creates a new database if not exist, `Database.DBTRUNC',
which means it creates a new database regardless if one exists. Both of `Database.DBREADER'
and `Database.DBWRITER' can be added to by bitwise or: `Database.DBNOLCK', which means it
opens a database file without file locking, or `Database.DBLCKNB', which means locking is
performed without blocking. If `Database.DBNOLCK' is used, the application is responsible
for exclusion control. `Database.DBCREAT' can be added to by bitwise or:
`Database.DBPERFNG', which means N-gram analysis is performed against European text also,
`Database.DBCHACAT', which means character category analysis is performed instead of N-gram
analysis, `Database.DBSMALL', which means the index is tuned to register less than 50000
documents, `Database.DBLARGE', which means the index is tuned to register more than 300000
documents, `Database.DBHUGE', which means the index is tuned to register more than 1000000
documents, `Database.DBHUGE2', which means the index is tuned to register more than 5000000
documents, `Database.DBHUGE3', which means the index is tuned to register more than 10000000
documents, `Database.DBSCVOID', which means scores are stored as void, `Database.DBSCINT',
which means scores are stored as 32-bit integer, `Database.DBSCASIS', which means scores
are stored as-is and marked not to be tuned when search.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="optimize(int)"><!-- --></A><H3>
optimize</H3>
<PRE>
public boolean <B>optimize</B>(int options)</PRE>
<DL>
<DD>Optimize the database.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>options</CODE> - options: `Database.OPTNOPURGE' to omit purging dispensable region of deleted
documents, `Database.OPTNODBOPT' to omit optimization of the database files. The two can be
specified at the same time by bitwise or.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="out_doc(int, int)"><!-- --></A><H3>
out_doc</H3>
<PRE>
public boolean <B>out_doc</B>(int id,
int options)</PRE>
<DL>
<DD>Remove a document.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - the ID number of a registered document.<DD><CODE>options</CODE> - options: `Database.ODCLEAN' to clean up dispensable regions of the deleted
document.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="put_doc(estraier.Document, int)"><!-- --></A><H3>
put_doc</H3>
<PRE>
public boolean <B>put_doc</B>(<A HREF="../estraier/Document.html" title="class in estraier">Document</A> doc,
int options)</PRE>
<DL>
<DD>Add a document.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>doc</CODE> - a document object. The document object should have the URI attribute.<DD><CODE>options</CODE> - options: `Database.PDCLEAN' to clean up dispensable regions of the
overwritten document.
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="scan_doc(estraier.Document, estraier.Condition)"><!-- --></A><H3>
scan_doc</H3>
<PRE>
public boolean <B>scan_doc</B>(<A HREF="../estraier/Document.html" title="class in estraier">Document</A> doc,
<A HREF="../estraier/Condition.html" title="class in estraier">Condition</A> cond)</PRE>
<DL>
<DD>Check whether a document object matches the phrase of a search condition object definitely.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>doc</CODE> - a document object.<DD><CODE>cond</CODE> - a search condition object.
<DT><B>Returns:</B><DD>true if the document matches the phrase of the condition object definitely, else it
is false.</DL>
</DD>
</DL>
<HR>
<A NAME="search_meta(estraier.Database[], estraier.Condition)"><!-- --></A><H3>
search_meta</H3>
<PRE>
public static <A HREF="../estraier/Result.html" title="class in estraier">Result</A> <B>search_meta</B>(<A HREF="../estraier/Database.html" title="class in estraier">Database</A>[] dbs,
<A HREF="../estraier/Condition.html" title="class in estraier">Condition</A> cond)</PRE>
<DL>
<DD>Search plural databases for documents corresponding a condition.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dbs</CODE> - an array whose elements are database objects.<DD><CODE>cond</CODE> - a condition object.
<DT><B>Returns:</B><DD>a result object. On error, `null' is returned.</DL>
</DD>
</DL>
<HR>
<A NAME="search(estraier.Condition)"><!-- --></A><H3>
search</H3>
<PRE>
public <A HREF="../estraier/Result.html" title="class in estraier">Result</A> <B>search</B>(<A HREF="../estraier/Condition.html" title="class in estraier">Condition</A> cond)</PRE>
<DL>
<DD>Search for documents corresponding a condition.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>cond</CODE> - a condition object.
<DT><B>Returns:</B><DD>a result object. On error, `null' is returned.</DL>
</DD>
</DL>
<HR>
<A NAME="set_cache_size(double, int, int, int)"><!-- --></A><H3>
set_cache_size</H3>
<PRE>
public void <B>set_cache_size</B>(double size,
int anum,
int tnum,
int rnum)</PRE>
<DL>
<DD>Set the maximum size of the cache memory.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>size</CODE> - the maximum size of the index cache. By default, it is 64MB. If it is not
more than 0, the current size is not changed.<DD><CODE>anum</CODE> - the maximum number of cached records for document attributes. By default, it
is 8192. If it is not more than 0, the current size is not changed.<DD><CODE>tnum</CODE> - the maximum number of cached records for document texts. By default, it is
1024. If it is not more than 0, the current size is not changed.<DD><CODE>rnum</CODE> - the maximum number of cached records for occurrence results. By default, it
is 256. If it is not more than 0, the current size is not changed.</DL>
</DD>
</DL>
<HR>
<A NAME="set_informer(estraier.DatabaseInformer)"><!-- --></A><H3>
set_informer</H3>
<PRE>
public void <B>set_informer</B>(<A HREF="../estraier/DatabaseInformer.html" title="interface in estraier">DatabaseInformer</A> informer)</PRE>
<DL>
<DD>Set the callback function to inform of database events.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>informer</CODE> - an arbitrary object with a method named as `inform'.</DL>
</DD>
</DL>
<HR>
<A NAME="set_wildmax(int)"><!-- --></A><H3>
set_wildmax</H3>
<PRE>
public void <B>set_wildmax</B>(int num)</PRE>
<DL>
<DD>Set the maximum number of expansion of wild cards.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>num</CODE> - the maximum number of expansion of wild cards.</DL>
</DD>
</DL>
<HR>
<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public double <B>size</B>()</PRE>
<DL>
<DD>Get the size.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the size of the database.</DL>
</DD>
</DL>
<HR>
<A NAME="sync()"><!-- --></A><H3>
sync</H3>
<PRE>
public boolean <B>sync</B>()</PRE>
<DL>
<DD>Synchronize updating contents.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if success, else it is false.</DL>
</DD>
</DL>
<HR>
<A NAME="uri_to_id(java.lang.String)"><!-- --></A><H3>
uri_to_id</H3>
<PRE>
public int <B>uri_to_id</B>(java.lang.String uri)</PRE>
<DL>
<DD>Get the ID of a document specified by URI.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>uri</CODE> - the URI of a registered document.
<DT><B>Returns:</B><DD>the ID of the document. On error, -1 is returned.</DL>
</DD>
</DL>
<HR>
<A NAME="word_num()"><!-- --></A><H3>
word_num</H3>
<PRE>
public int <B>word_num</B>()</PRE>
<DL>
<DD>Get the number of unique words.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the number of unique words in the database.</DL>
</DD>
</DL>
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