On Tue, 4 Nov 2003, Nick Burch wrote:
> Since I'm also getting information from the spreadsheet itself via the
> hssf.usermodel stuff, which accepts a POIFSFileSystem object, I thought
> I'd do something similar (rather than the eventfilesystem route described
> in docs/POI/hpsf/how-to.html)
I've figured this out for myself. In case anyone else is interested, the
trick was to create a DocumentInputStream from the DocumentNode I've
found, then use this to create the PropertySet object
I've attached a patch for org/apache/poi/hpsf/PropertySetFactory which
allows you to call PropertySetFactory.create on a POIFSFilesystem, as well
as on an InputStream as you currently can
Nick
--- PropertySetFactory.java.sav 2003-02-01 13:28:28.000000000 +0000
+++ PropertySetFactory.java 2003-11-12 13:43:39.000000000 +0000
@@ -54,7 +54,11 @@
*/
package org.apache.poi.hpsf;
+import org.apache.poi.poifs.filesystem.*;
+import org.apache.poi.poifs.property.*;
+
import java.io.*;
+import java.util.Iterator;
/**
* <p>Factory class to create instances of [EMAIL PROTECTED] SummaryInformation},
@@ -98,4 +102,81 @@
return ps;
}
+ /**
+ * <p>Creates the most specific [EMAIL PROTECTED] PropertySet} from an [EMAIL
PROTECTED]
+ * POIFSFileSystem}. This is preferrably a [EMAIL PROTECTED]
+ * DocumentSummaryInformation} or a [EMAIL PROTECTED] SummaryInformation}. If
+ * the specified [EMAIL PROTECTED] InputStream} does not contain a property
+ * set stream, an exception is thrown.</p>
+ *
+ * @param fs the POI filesystem that contains the PropertySet stream.
+ * @return The created [EMAIL PROTECTED] PropertySet}.
+ * @throws IOException if the stream cannot be read
+ * @throws NoPropertySetStreamException if the stream does not
+ * contain a property set.
+ * @throws UnexpectedPropertySetTypeException if the property
+ * set's type is unexpected.
+ */
+ public static PropertySet create(final POIFSFileSystem fs)
+ throws NoPropertySetStreamException,
+ UnexpectedPropertySetTypeException, IOException
+ {
+ // Fetch the DocumentNode of the PropertySet
+ DocumentNode setNode = getInformationNode(fs.getRoot());
+
+ if(setNode == null) {
+ throw new NoPropertySetStreamException("No property set found
in the Root of that File System");
+ }
+
+ // Look through for the POIFSDocument
+ Iterator infoSections = setNode.getViewableIterator();
+ while(infoSections.hasNext()) {
+ Object o = infoSections.next();
+ if(o instanceof POIFSDocument) {
+ POIFSDocument pd = (POIFSDocument)o;
+
+ // Now make the PropertySet
+ DocumentInputStream docin = new
DocumentInputStream(pd);
+
+ try {
+ return create(docin);
+ } catch (MarkUnsupportedException mse) {
+ // The DocumentInputStream supports this
+ }
+ }
+ }
+
+ throw new NoPropertySetStreamException("No property set found in the
Root of that File System");
+ }
+
+ /**
+ * <p>Find the first [EMAIL PROTECTED] DocumentNode} in the supplied
+ * [EMAIL PROTECTED] DirectoryEntry} that corresponds to a HPSF
+ * DocumentNode, and returns that.</p>
+ *
+ * @param dir the POI DirectoryNode that contains the PropertySet
+ * @return The created [EMAIL PROTECTED] DocumentNode}.
+ */
+ private static DocumentNode getInformationNode(DirectoryEntry dir) {
+ Iterator entries = dir.getEntries();
+
+ while(entries.hasNext()) {
+ Object o = entries.next();
+ if(o instanceof DocumentNode) {
+ DocumentNode doc = (DocumentNode)o;
+ String docName = doc.getName();
+
+ if(docName.equals("\005SummaryInformation")) {
+ // Bingo, got a SummaryInformation
+ return doc;
+ }
+ if(docName.equals("\005DocumentSummaryInformation")) {
+ // Bingo, got a DocumentSummaryInformation
+ return doc;
+ }
+ }
+ }
+
+ return null;
+ }
}
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
