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Allow Ole10Native to be created from a DirectoryNode, not only a a POIFS

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1183618 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2011-10-15 10:27:52 +00:00
parent 67655200c5
commit 6c6fb5aad7
1 changed files with 34 additions and 19 deletions
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53
src/java/org/apache/poi/poifs/filesystem/Ole10Native.java
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@ -17,12 +17,13 @@
package org.apache.poi.poifs.filesystem;
import org.apache.poi.util.*;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Arrays;
import org.apache.poi.util.HexDump;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.LittleEndianConsts;
import org.apache.poi.util.StringUtil;
/**
* Represents an Ole10Native record which is wrapped around certain binary
@ -57,23 +58,37 @@ public class Ole10Native {
* @throws Ole10NativeException on invalid or unexcepted data format
*/
public static Ole10Native createFromEmbeddedOleObject(POIFSFileSystem poifs) throws IOException, Ole10NativeException {
boolean plain = false;
try {
poifs.getRoot().getEntry("\u0001Ole10ItemName");
plain = true;
} catch (FileNotFoundException ex) {
plain = false;
}
DocumentInputStream dis = poifs.createDocumentInputStream(OLE10_NATIVE);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOUtils.copy(dis, bos);
byte[] data = bos.toByteArray();
return new Ole10Native(data, 0, plain);
return createFromEmbeddedOleObject(poifs.getRoot());
}
/**
* Creates an instance of this class from an embedded OLE Object. The OLE Object is expected
* to include a stream "{01}Ole10Native" which contains the actual
* data relevant for this class.
*
* @param poifs POI Filesystem object
* @return Returns an instance of this class
* @throws IOException on IO error
* @throws Ole10NativeException on invalid or unexcepted data format
*/
public static Ole10Native createFromEmbeddedOleObject(DirectoryNode directory) throws IOException, Ole10NativeException {
boolean plain = false;
try {
directory.getEntry("\u0001Ole10ItemName");
plain = true;
} catch (FileNotFoundException ex) {
plain = false;
}
DocumentEntry nativeEntry =
(DocumentEntry)directory.getEntry(OLE10_NATIVE);
byte[] data = new byte[nativeEntry.getSize()];
directory.createDocumentInputStream(nativeEntry).read(data);
return new Ole10Native(data, 0, plain);
}
/**
* Creates an instance and fills the fields based on the data in the given buffer.
*