org.apache.lucene.store

Class TrackingDirectoryWrapper

java.lang.Object

org.apache.lucene.store.Directory

org.apache.lucene.store.FilterDirectory

org.apache.lucene.store.TrackingDirectoryWrapper

All Implemented Interfaces:

Closeable, AutoCloseable

public final class TrackingDirectoryWrapper
extends FilterDirectory

A delegating Directory that records which files were written to and deleted.

Field Summary

Fields inherited from class org.apache.lucene.store.FilterDirectory

in

Constructor Summary

Constructors

Constructor and Description
TrackingDirectoryWrapper(Directory in)

Method Summary

Methods

Modifier and Type	Method and Description
void	copy(Directory to, String src, String dest, IOContext context) Copies the file src to Directory to under the new file name dest.
IndexOutput	createOutput(String name, IOContext context) Creates a new, empty file in the directory with the given name.
void	deleteFile(String name) Removes an existing file in the directory.
Set<String>	getCreatedFiles()

Methods inherited from class org.apache.lucene.store.FilterDirectory

clearLock, close, fileExists, fileLength, getDelegate, getLockFactory, getLockID, listAll, makeLock, openInput, setLockFactory, sync, toString

Methods inherited from class org.apache.lucene.store.Directory

ensureOpen, openChecksumInput

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TrackingDirectoryWrapper

public TrackingDirectoryWrapper(Directory in)

Method Detail

deleteFile

public void deleteFile(String name)
                throws IOException

Description copied from class: Directory

Removes an existing file in the directory.

Overrides:

deleteFile in class FilterDirectory

Throws:

IOException

createOutput

public IndexOutput createOutput(String name,
                       IOContext context)
                         throws IOException

Description copied from class: Directory

Creates a new, empty file in the directory with the given name. Returns a stream writing this file.

Overrides:

createOutput in class FilterDirectory

Throws:

IOException

copy

public void copy(Directory to,
        String src,
        String dest,
        IOContext context)
          throws IOException

Description copied from class: Directory

Copies the file src to Directory to under the new file name dest.

If you want to copy the entire source directory to the destination one, you can do so like this:

 Directory to; // the directory to copy to
 for (String file : dir.listAll()) {
   dir.copy(to, file, newFile, IOContext.DEFAULT); // newFile can be either file, or a new name
 }
 

NOTE: this method does not check whether dest exist and will overwrite it if it does.

Overrides:

copy in class Directory

Throws:

IOException

getCreatedFiles

public Set<String> getCreatedFiles()