/**
* Get the PackagePart that is the target of a relationship.
*
* @param rel A relationship from this part to another one
* @return The target part of the relationship
*/
public PackagePart GetRelatedPart(PackageRelationship rel)
{
// Ensure this is one of ours
if (!IsRelationshipExists(rel))
{
throw new ArgumentException("Relationship " + rel + " doesn't start with this part " + _partName);
}
// Get the target URI, excluding any relative fragments
Uri target = rel.TargetUri;
if (target.OriginalString.IndexOf('#') >= 0)
{
String t = target.ToString();
try
{
target = PackagingUriHelper.ParseUri(t.Substring(0, t.IndexOf('#')), UriKind.Absolute);
}
catch (UriFormatException e)
{
throw new InvalidFormatException("Invalid target URI: " + t);
}
}
// Turn that into a name, and fetch
PackagePartName relName = PackagingUriHelper.CreatePartName(target);
PackagePart part = _container.GetPart(relName);
if (part == null)
{
throw new ArgumentException("No part found for relationship " + rel);
}
return(part);
}
/**
* Builds a PackagePartName for the given ZipEntry,
* or null if it's the content types / invalid part
*/
private PackagePartName BuildPartName(ZipEntry entry)
{
try
{
// We get an error when we parse [Content_Types].xml
// because it's not a valid URI.
if (entry.Name.ToLower().Equals(
ContentTypeManager.CONTENT_TYPES_PART_NAME.ToLower()))
{
return(null);
}
return(PackagingUriHelper.CreatePartName(ZipHelper
.GetOPCNameFromZipItemName(entry.Name)));
}
catch (Exception)
{
// We assume we can continue, even in degraded mode ...
//logger.log(POILogger.WARN,"Entry "
// + entry.getName()
// + " is not valid, so this part won't be add to the package.");
return(null);
}
}