org.apache.poi.poifs.poibrowser.DocumentDescriptor Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
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(the "License"); you may not use this file except in compliance with
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package org.apache.poi.poifs.poibrowser;
import java.io.IOException;
import org.apache.poi.poifs.filesystem.DocumentInputStream;
import org.apache.poi.poifs.filesystem.POIFSDocumentPath;
import org.apache.poi.util.IOUtils;
/**
* Describes the most important (whatever that is) features of a
* {@link POIFSDocumentPath}.
*/
class DocumentDescriptor
{
//arbitrarily selected; may need to increase
private static final int MAX_RECORD_LENGTH = 100_000;
String name;
POIFSDocumentPath path;
DocumentInputStream stream;
int size;
byte[] bytes;
/**
* Creates a {@link DocumentDescriptor}.
*
* @param name The stream's name.
*
* @param path The stream's path in the POI filesystem hierarchy.
*
* @param stream The stream.
*
* @param nrOfBytes The maximum number of bytes to display in a
* dump starting at the beginning of the stream.
*/
public DocumentDescriptor(final String name,
final POIFSDocumentPath path,
final DocumentInputStream stream,
final int nrOfBytes) {
this.name = name;
this.path = path;
this.stream = stream;
try {
if (stream.markSupported()) {
stream.mark(nrOfBytes);
bytes = IOUtils.toByteArray(stream, nrOfBytes, MAX_RECORD_LENGTH);
stream.reset();
} else {
bytes = new byte[0];
}
size = bytes.length + stream.available();
} catch (IOException ex) {
System.out.println(ex);
}
}
}