/**
* Returns the {@link PackageRelationship#GetId()} of the
* {@link PackageRelationship}, that sources from the {@link PackagePart} of
* this {@link POIXMLDocumentPart} to the {@link PackagePart} of the given
* parameter value.
*
* @param part
* The {@link POIXMLDocumentPart} for which the according
* relation-id shall be found.
* @return The value of the {@link PackageRelationship#GetId()} or null, if
* parts are not related.
*/
public String GetRelationId(POIXMLDocumentPart part)
{
foreach (KeyValuePair <String, POIXMLDocumentPart> entry in relations)
{
if (entry.Value == part)
{
return(entry.Key);
}
}
return(null);
}
/**
* Iterate through the underlying PackagePart and create child POIXMLFactory instances
* using the specified factory
*
* @param factory the factory object that Creates POIXMLFactory instances
* @param context context map Containing already visited noted keyed by tarGetURI
*/
protected void Read(POIXMLFactory factory, Dictionary <PackagePart, POIXMLDocumentPart> context)
{
try
{
PackageRelationshipCollection rels = packagePart.Relationships;
foreach (PackageRelationship rel in rels)
{
if (rel.TargetMode == TargetMode.Internal)
{
Uri uri = rel.TargetUri;
PackagePart p;
if (uri.OriginalString.IndexOf('#') >= 0)
{
/*
* For internal references (e.g. '#Sheet1!A1') the namespace part is null
*/
p = null;
}
else
{
PackagePartName relName = PackagingUriHelper.CreatePartName(uri);
p = packagePart.Package.GetPart(relName);
if (p == null)
{
logger.Log(POILogger.ERROR, "Skipped invalid entry " + rel.TargetUri);
continue;
}
}
if (p == null || !context.ContainsKey(p))
{
POIXMLDocumentPart childPart = factory.CreateDocumentPart(this, rel, p);
childPart.parent = this;
AddRelation(rel.Id, childPart);
if (p != null)
{
context[p] = childPart;
if (p.HasRelationships)
{
childPart.Read(factory, context);
}
}
}
else
{
AddRelation(rel.Id, context[p]);
}
}
}
}
catch (Exception ex)
{
if ((null != ex.InnerException) && (null != ex.InnerException.InnerException))
{
// this type of exception is thrown when the XML Serialization does not match the input.
logger.Log(1, ex.InnerException.InnerException);
}
throw;
}
}
/**
* Remove the relation to the specified part in this namespace and remove the
* part, if it is no longer needed.
*/
protected internal void RemoveRelation(POIXMLDocumentPart part)
{
RemoveRelation(part, true);
}
/**
* Add a new child POIXMLDocumentPart
*
* @param part the child to add
*/
public void AddRelation(string id, POIXMLDocumentPart part)
{
relations[id] = part;
part.IncrementRelationCounter();
}
/**
* Creates an POIXMLDocumentPart representing the given namespace part, relationship and parent
* Called by {@link #read(POIXMLFactory, java.util.Map)} when Reading in an exisiting file.
*
* @param parent - Parent part
* @param part - The namespace part that holds xml data represenring this sheet.
* @param rel - the relationship of the given namespace part
* @see #read(POIXMLFactory, java.util.Map)
*/
public POIXMLDocumentPart(POIXMLDocumentPart parent, PackagePart part, PackageRelationship rel)
{
this.packagePart = part;
this.packageRel = rel;
this.parent = parent;
}
/**
* Create a POIXMLDocumentPart from existing namespace part and relation. This method is called
* from {@link POIXMLDocument#load(POIXMLFactory)} when parsing a document
*
* @param parent parent part
* @param rel the namespace part relationship
* @param part the PackagePart representing the Created instance
* @return A new instance of a POIXMLDocumentPart.
*/
public abstract POIXMLDocumentPart CreateDocumentPart(POIXMLDocumentPart parent, PackageRelationship rel, PackagePart part);
