/**
* Create an InputStream from the specified DocumentEntry
*
* @param document the DocumentEntry to be read
*
* @exception IOException if the DocumentEntry cannot be opened (like, maybe it has
* been deleted?)
*/
public DocumentInputStream(DocumentEntry document)
{
if (!(document is DocumentNode))
{
throw new IOException("Cannot open internal document storage");
}
DocumentNode documentNode = (DocumentNode)document;
DirectoryNode parentNode = (DirectoryNode)document.Parent;
if (documentNode.Document != null)
{
delegate1 = new ODocumentInputStream(document);
}
else if (parentNode.FileSystem != null)
{
delegate1 = new ODocumentInputStream(document);
}
else if (parentNode.NFileSystem != null)
{
delegate1 = new NDocumentInputStream(document);
}
else
{
throw new IOException("No FileSystem bound on the parent, can't read contents");
}
}
/**
* Copies an Entry into a target POIFS directory, recursively
*/
public static void CopyNodeRecursively(Entry entry, DirectoryEntry target)
{
// System.err.println("copyNodeRecursively called with "+entry.getName()+
// ","+target.getName());
DirectoryEntry newTarget = null;
if (entry.IsDirectoryEntry)
{
DirectoryEntry dirEntry = (DirectoryEntry)entry;
newTarget = target.CreateDirectory(entry.Name);
newTarget.StorageClsid = (dirEntry.StorageClsid);
IEnumerator <Entry> entries = dirEntry.Entries;
while (entries.MoveNext())
{
CopyNodeRecursively((Entry)entries.Current, newTarget);
}
}
else
{
DocumentEntry dentry = (DocumentEntry)entry;
DocumentInputStream dstream = new DocumentInputStream(dentry);
target.CreateDocument(dentry.Name, dstream);
dstream.Dispose();
}
}
/**
* Checks to see if two Documents have the same name
* and the same contents. (Their parent directories are
* not checked)
*/
public static bool AreDocumentsIdentical(DocumentEntry docA, DocumentEntry docB)
{
if (!docA.Name.Equals(docB.Name))
{
// Names don't match, not the same
return(false);
}
if (docA.Size != docB.Size)
{
// Wrong sizes, can't have the same contents
return(false);
}
bool matches = true;
DocumentInputStream inpA = null, inpB = null;
try
{
inpA = new DocumentInputStream(docA);
inpB = new DocumentInputStream(docB);
int readA, readB;
do
{
readA = inpA.Read();
readB = inpB.Read();
if (readA != readB)
{
matches = false;
break;
}
} while (readA != -1 && readB != -1);
}
finally
{
if (inpA != null)
{
inpA.Dispose();
}
if (inpB != null)
{
inpB.Dispose();
}
}
return(matches);
}
/**
* Create an InputStream from the specified Document
*
* @param document the Document to be read
*/
public DocumentInputStream(NPOIFSDocument document)
{
delegate1 = new NDocumentInputStream(document);
}
