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Directory (Lucene 2.1.0 API)
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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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org.apache.lucene.store</FONT>
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Class Directory</H2>
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<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.apache.lucene.store.Directory</B>
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<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/apache/lucene/store/FSDirectory.html" title="class in org.apache.lucene.store">FSDirectory</A>, <A HREF="../../../../org/apache/lucene/store/RAMDirectory.html" title="class in org.apache.lucene.store">RAMDirectory</A></DD>
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<DT>public abstract class <B>Directory</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL>
<P>
A Directory is a flat list of files. Files may be written once, when they are created. Once a file is created it may only be opened for read, or deleted. Random access is permitted both when reading and writing. <p> Java's i/o APIs not used directly, but rather all i/o is through this API. This permits things such as: <ul> <li> implementation of RAM-based indices; <li> implementation indices stored in a database, via JDBC; <li> implementation of an index as a single file; </ul> Directory locking is implemented by an instance of <A HREF="../../../../org/apache/lucene/store/LockFactory.html" title="class in org.apache.lucene.store"><CODE>LockFactory</CODE></A>, and can be changed for each Directory instance using <A HREF="../../../../org/apache/lucene/store/Directory.html#setLockFactory(org.apache.lucene.store.LockFactory)"><CODE>setLockFactory(org.apache.lucene.store.LockFactory)</CODE></A>.
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<DT><B>Author:</B></DT> <DD>Doug Cutting</DD></DL>
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<CODE>protected <A HREF="../../../../org/apache/lucene/store/LockFactory.html" title="class in org.apache.lucene.store">LockFactory</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#lockFactory">lockFactory</A></B></CODE>
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Holds the LockFactory instance (implements locking for this Directory instance).</TD>
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<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#Directory()">Directory</A></B>()</CODE>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#clearLock(java.lang.String)">clearLock</A></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> name)</CODE>
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Attempt to clear (forcefully unlock and remove) the specified lock.</TD>
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<CODE>abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#close()">close</A></B>()</CODE>
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Closes the store.</TD>
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<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#copy(org.apache.lucene.store.Directory, org.apache.lucene.store.Directory, boolean)">copy</A></B>(<A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A> src, <A HREF="../../../../org/apache/lucene/store/Directory.html" title="class in org.apache.lucene.store">Directory</A> dest, boolean closeDirSrc)</CODE>
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Copy contents of a directory src to a directory dest.</TD>
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<CODE>abstract <A HREF="../../../../org/apache/lucene/store/IndexOutput.html" title="class in org.apache.lucene.store">IndexOutput</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#createOutput(java.lang.String)">createOutput</A></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> name)</CODE>
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Creates a new, empty file in the directory with the given name.</TD>
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<CODE>abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#deleteFile(java.lang.String)">deleteFile</A></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> name)</CODE>
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Removes an existing file in the directory.</TD>
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<CODE>abstract boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#fileExists(java.lang.String)">fileExists</A></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> name)</CODE>
<BR>
Returns true iff a file with the given name exists.</TD>
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<CODE>abstract long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#fileLength(java.lang.String)">fileLength</A></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> name)</CODE>
<BR>
Returns the length of a file in the directory.</TD>
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<CODE>abstract long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Directory.html#fileModified(java.lang.String)">fileModified</A></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> name)</CODE>
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