segmentinfos.html

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<PRE>
public static final int <B>FORMAT</B></PRE>
<DL>
<DD>The file format version, a negative number.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.lucene.index.SegmentInfos.FORMAT">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="FORMAT_LOCKLESS"><!-- --></A><H3>
FORMAT_LOCKLESS</H3>
<PRE>
public static final int <B>FORMAT_LOCKLESS</B></PRE>
<DL>
<DD>This format adds details used for lockless commits.  It differs
 slightly from the previous format in that file names
 are never re-used (write once).  Instead, each file is
 written to the next generation.  For example,
 segments_1, segments_2, etc.  This allows us to not use
 a commit lock.  See <a
 href="http://lucene.apache.org/java/docs/fileformats.html">file
 formats</a> for details.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.lucene.index.SegmentInfos.FORMAT_LOCKLESS">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="FORMAT_SINGLE_NORM_FILE"><!-- --></A><H3>
FORMAT_SINGLE_NORM_FILE</H3>
<PRE>
public static final int <B>FORMAT_SINGLE_NORM_FILE</B></PRE>
<DL>
<DD>This is the current file format written.  It adds a
 "hasSingleNormFile" flag into each segment info.
 See <a href="http://issues.apache.org/jira/browse/LUCENE-756">LUCENE-756</a>
 for details.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.lucene.index.SegmentInfos.FORMAT_SINGLE_NORM_FILE">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="counter"><!-- --></A><H3>
counter</H3>
<PRE>
public int <B>counter</B></PRE>
<DL>
<DL>
</DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="SegmentInfos()"><!-- --></A><H3>
SegmentInfos</H3>
<PRE>
public <B>SegmentInfos</B>()</PRE>
<DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
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</TABLE>

<A NAME="info(int)"><!-- --></A><H3>
info</H3>
<PRE>
public final org.apache.lucene.index.SegmentInfo <B>info</B>(int&nbsp;i)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getCurrentSegmentGeneration(java.lang.String[])"><!-- --></A><H3>
getCurrentSegmentGeneration</H3>
<PRE>
public static long <B>getCurrentSegmentGeneration</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;files)</PRE>
<DL>
<DD>Get the generation (N) of the current segments_N file
 from a list of files.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>files</CODE> - -- array of file names to check</DL>
</DD>
</DL>
<HR>

<A NAME="getCurrentSegmentGeneration(org.apache.lucene.store.Directory)"><!-- --></A><H3>
getCurrentSegmentGeneration</H3>
<PRE>
public static long <B>getCurrentSegmentGeneration</B>(<A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A>&nbsp;directory)
                                        throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Get the generation (N) of the current segments_N file
 in the directory.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>directory</CODE> - -- directory to search for the latest segments_N file
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getCurrentSegmentFileName(java.lang.String[])"><!-- --></A><H3>
getCurrentSegmentFileName</H3>
<PRE>
public static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getCurrentSegmentFileName</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;files)
                                        throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Get the filename of the current segments_N file
 from a list of files.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>files</CODE> - -- array of file names to check
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getCurrentSegmentFileName(org.apache.lucene.store.Directory)"><!-- --></A><H3>
getCurrentSegmentFileName</H3>
<PRE>
public static <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getCurrentSegmentFileName</B>(<A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A>&nbsp;directory)
                                        throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Get the filename of the current segments_N file
 in the directory.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>directory</CODE> - -- directory to search for the latest segments_N file
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getCurrentSegmentFileName()"><!-- --></A><H3>
getCurrentSegmentFileName</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getCurrentSegmentFileName</B>()</PRE>
<DL>
<DD>Get the segments_N filename in use by this segment infos.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getNextSegmentFileName()"><!-- --></A><H3>
getNextSegmentFileName</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getNextSegmentFileName</B>()</PRE>
<DL>
<DD>Get the next segments_N filename that will be written.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="read(org.apache.lucene.store.Directory, java.lang.String)"><!-- --></A><H3>
read</H3>
<PRE>
public final void <B>read</B>(<A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A>&nbsp;directory,
                       <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;segmentFileName)
                throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Read a particular segmentFileName.  Note that this may
 throw an IOException if a commit is in process.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>directory</CODE> - -- directory containing the segments file<DD><CODE>segmentFileName</CODE> - -- segment file to load
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="read(org.apache.lucene.store.Directory)"><!-- --></A><H3>
read</H3>
<PRE>
public final void <B>read</B>(<A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A>&nbsp;directory)
                throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>This version of read uses the retry logic (for lock-less
 commits) to find the right segments file to load.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="write(org.apache.lucene.store.Directory)"><!-- --></A><H3>
write</H3>
<PRE>
public final void <B>write</B>(<A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A>&nbsp;directory)