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Provide a convenience method for creating a PropertySet from a Directory + Entry 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1590650 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2014-04-28 14:19:13 +00:00
parent 52c6fd587c
commit ba4225395f
2 changed files with 43 additions and 26 deletions
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22
src/examples/src/org/apache/poi/hpsf/examples/ModifyDocumentSummaryInformation.java
View File

@ -26,14 +26,11 @@ import org.apache.poi.hpsf.CustomProperties;
import org.apache.poi.hpsf.DocumentSummaryInformation;
import org.apache.poi.hpsf.MarkUnsupportedException;
import org.apache.poi.hpsf.NoPropertySetStreamException;
import org.apache.poi.hpsf.PropertySet;
import org.apache.poi.hpsf.PropertySetFactory;
import org.apache.poi.hpsf.SummaryInformation;
import org.apache.poi.hpsf.UnexpectedPropertySetTypeException;
import org.apache.poi.hpsf.WritingNotSupportedException;
import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.DocumentInputStream;
import org.apache.poi.poifs.filesystem.NPOIFSFileSystem;
/**
@ -105,17 +102,12 @@ public class ModifyDocumentSummaryInformation {
SummaryInformation si;
try
{
DocumentEntry siEntry = (DocumentEntry)
dir.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
DocumentInputStream dis = new DocumentInputStream(siEntry);
PropertySet ps = new PropertySet(dis);
dis.close();
si = new SummaryInformation(ps);
si = (SummaryInformation)PropertySetFactory.create(
dir, SummaryInformation.DEFAULT_STREAM_NAME);
}
catch (FileNotFoundException ex)
{
/* There is no summary information yet. We have to create a new
* one. */
// There is no summary information yet. We have to create a new one
si = PropertySetFactory.newSummaryInformation();
}
@ -133,12 +125,8 @@ public class ModifyDocumentSummaryInformation {
DocumentSummaryInformation dsi;
try
{
DocumentEntry dsiEntry = (DocumentEntry)
dir.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
DocumentInputStream dis = new DocumentInputStream(dsiEntry);
PropertySet ps = new PropertySet(dis);
dis.close();
dsi = new DocumentSummaryInformation(ps);
dsi = (DocumentSummaryInformation)PropertySetFactory.create(
dir, DocumentSummaryInformation.DEFAULT_STREAM_NAME);
}
catch (FileNotFoundException ex)
{

47
src/java/org/apache/poi/hpsf/PropertySetFactory.java
View File

@ -17,21 +17,55 @@
package org.apache.poi.hpsf;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import org.apache.poi.hpsf.wellknown.SectionIDMap;
import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.DocumentInputStream;
/**
* <p>Factory class to create instances of {@link SummaryInformation},
* {@link DocumentSummaryInformation} and {@link PropertySet}.</p>
*
* @author Rainer Klute <a
* href="mailto:klute@rainer-klute.de">&lt;klute@rainer-klute.de&gt;</a>
*/
public class PropertySetFactory
{
/**
* <p>Creates the most specific {@link PropertySet} from an entry
* in the specified POIFS Directory. This is preferrably a {@link
* DocumentSummaryInformation} or a {@link SummaryInformation}. If
* the specified entry does not contain a property set stream, an
* exception is thrown. If no entry is found with the given name,
* an exception is thrown.</p>
*
* @param dir The directory to find the PropertySet in
* @param name The name of the entry containing the PropertySet
* @return The created {@link PropertySet}.
* @throws FileNotFoundException if there is no entry with that name
* @throws NoPropertySetStreamException if the stream does not
* contain a property set.
* @throws IOException if some I/O problem occurs.
* @exception UnsupportedEncodingException if the specified codepage is not
* supported.
*/
public static PropertySet create(final DirectoryEntry dir, final String name)
throws FileNotFoundException, NoPropertySetStreamException,
IOException, UnsupportedEncodingException
{
InputStream inp = null;
try {
DocumentEntry entry = (DocumentEntry)dir.getEntry(name);
inp = new DocumentInputStream(entry);
try {
return create(inp);
} catch (MarkUnsupportedException e) { return null; }
} finally {
if (inp != null) inp.close();
}
}
/**
* <p>Creates the most specific {@link PropertySet} from an {@link
@ -73,8 +107,6 @@ public class PropertySetFactory
}
}
/**
* <p>Creates a new summary information.</p>
*
@ -96,8 +128,6 @@ public class PropertySetFactory
}
}
/**
* <p>Creates a new document summary information.</p>
*
@ -118,5 +148,4 @@ public class PropertySetFactory
throw new HPSFRuntimeException(ex);
}
}
}
}