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/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.poifs.filesystem;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.poifs.eventfilesystem.POIFSReader;
import org.apache.poi.poifs.eventfilesystem.POIFSReaderEvent;
import org.apache.poi.poifs.eventfilesystem.POIFSReaderListener;
/**
* Test (Proof of concept) program that employs the
* POIFSReaderListener and POIFSWriterListener interfaces
*
* @author Marc Johnson (mjohnson at apache dot org)
*/
public class ReaderWriter
implements POIFSReaderListener, POIFSWriterListener
{
private final POIFSFileSystem filesystem;
private final DirectoryEntry root;
// keys are DocumentDescriptors, values are byte[]s
private final Map<DocumentDescriptor, byte[]> dataMap;
/**
* Constructor ReaderWriter
*
*
* @param filesystem
*
*/
ReaderWriter(final POIFSFileSystem filesystem)
{
this.filesystem = filesystem;
root = this.filesystem.getRoot();
dataMap = new HashMap<>();
}
/**
* Method main
*
*
* @param args
*
* @exception IOException
*
*/
public static void main(String [] args)
throws IOException
{
if (args.length != 2)
{
System.err.println(
"two arguments required: one input file name and one output file name");
}
else
{
POIFSReader reader = new POIFSReader();
POIFSFileSystem filesystem = new POIFSFileSystem();
reader.registerListener(new ReaderWriter(filesystem));
FileInputStream istream = new FileInputStream(args[ 0 ]);
reader.read(istream);
istream.close();
FileOutputStream ostream = new FileOutputStream(args[ 1 ]);
filesystem.writeFilesystem(ostream);
ostream.close();
filesystem.close();
}
}
/* ********** START implementation of POIFSReaderListener ********** */
/**
* Process a POIFSReaderEvent that this listener had registered
* for
*
* @param event the POIFSReaderEvent
*/
@Override
public void processPOIFSReaderEvent(final POIFSReaderEvent event)
{
DocumentInputStream istream = event.getStream();
POIFSDocumentPath path = event.getPath();
String name = event.getName();
try
{
int size = istream.available();
byte[] data = new byte[ istream.available() ];
istream.read(data);
DocumentDescriptor descriptor = new DocumentDescriptor(path,
name);
System.out.println("adding document: " + descriptor + " (" + size
+ " bytes)");
dataMap.put(descriptor, data);
//int pathLength = path.length();
DirectoryEntry entry = root;
for (int k = 0; k < path.length(); k++)
{
String componentName = path.getComponent(k);
Entry nextEntry = null;
try
{
nextEntry = entry.getEntry(componentName);
}
catch (FileNotFoundException ignored)
{
try
{
nextEntry = entry.createDirectory(componentName);
}
catch (IOException e)
{
System.out.println("Unable to create directory");
e.printStackTrace();
System.exit(1);
}
}
entry = ( DirectoryEntry ) nextEntry;
}
entry.createDocument(name, size, this);
}
catch (IOException ignored)
{
}
}
/* ********** END implementation of POIFSReaderListener ********** */
/* ********** START implementation of POIFSWriterListener ********** */
/**
* Process a POIFSWriterEvent that this listener had registered
* for
*
* @param event the POIFSWriterEvent
*/
@Override
public void processPOIFSWriterEvent(final POIFSWriterEvent event)
{
try
{
DocumentDescriptor descriptor =
new DocumentDescriptor(event.getPath(), event.getName());
System.out.println("looking up document: " + descriptor + " ("
+ event.getLimit() + " bytes)");
event.getStream().write(dataMap.get(descriptor));
}
catch (IOException e)
{
System.out.println("Unable to write document");
e.printStackTrace();
System.exit(1);
}
}
/* ********** END implementation of POIFSWriterListener ********** */
} // end public class ReaderWriter
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