/**
* Add a relationship to a part (except relationships part).
* <p>
* Check rule M1.25: The Relationships part shall not have relationships to
* any other part. Package implementers shall enforce this requirement upon
* the attempt to create such a relationship and shall treat any such
* relationship as invalid.
* </p>
* @param targetURI
* URI of the target part. Must be relative to the source root
* directory of the part.
* @param targetMode
* Mode [Internal|External].
* @param relationshipType
* Type of relationship.
* @param id
* Relationship unique id.
* @return The newly created and added relationship
*
* @throws InvalidFormatException
* If the URI point to a relationship part URI.
* @see org.apache.poi.OpenXml4Net.opc.RelationshipSource#AddRelationship(org.apache.poi.OpenXml4Net.opc.PackagePartName,
* org.apache.poi.OpenXml4Net.opc.TargetMode, java.lang.String, java.lang.String)
*/
public PackageRelationship AddRelationship(Uri targetURI,
TargetMode targetMode, String relationshipType, String id)
{
_container.ThrowExceptionIfReadOnly();
if (targetURI == null)
{
throw new ArgumentException("targetPartName");
}
//if (targetMode == null)
//{
// throw new ArgumentException("targetMode");
//}
if (relationshipType == null)
{
throw new ArgumentException("relationshipType");
}
// Try to retrieve the target part
if (this.IsRelationshipPart ||
PackagingUriHelper.IsRelationshipPartURI(targetURI))
{
throw new InvalidOperationException(
"Rule M1.25: The Relationships part shall not have relationships to any other part.");
}
if (_relationships == null)
{
_relationships = new PackageRelationshipCollection();
}
return(_relationships.AddRelationship(targetURI,
targetMode, relationshipType, id));
}
/**
* Adds an external relationship to a part (except relationships part).
*
* The targets of external relationships are not subject to the same
* validity checks that internal ones are, as the contents is potentially
* any file, URL or similar.
*
* @param target
* External target of the relationship
* @param relationshipType
* Type of relationship.
* @param id
* Relationship unique id.
* @return The newly created and added relationship
* @see org.apache.poi.OpenXml4Net.opc.RelationshipSource#addExternalRelationship(java.lang.String,
* java.lang.String)
*/
public PackageRelationship AddExternalRelationship(String target,
String relationshipType, String id)
{
if (target == null)
{
throw new ArgumentException("target");
}
if (relationshipType == null)
{
throw new ArgumentException("relationshipType");
}
if (_relationships == null)
{
_relationships = new PackageRelationshipCollection();
}
Uri targetURI;
try
{
targetURI = PackagingUriHelper.ParseUri(target, UriKind.RelativeOrAbsolute);
}
catch (UriFormatException e)
{
throw new ArgumentException("Invalid target - " + e);
}
return(_relationships.AddRelationship(targetURI, TargetMode.External,
relationshipType, id));
}
/**
* Retrieves all relations with the specified type.
*
* @param typeFilter
* Relationship type filter. If <b>null</b> then all
* relationships are returned.
* @return All relationships of the type specified by the filter.
*/
public PackageRelationshipCollection GetRelationships(string typeFilter)
{
PackageRelationshipCollection coll = new PackageRelationshipCollection(
this, typeFilter);
return(coll);
}
/**
* Ensure the package relationships collection instance is built.
*
* @throws InvalidFormatException
* Throws if
*/
private void LoadRelationships()
{
if (this._relationships == null && !this.IsRelationshipPart)
{
this.ThrowExceptionIfRelationship();
_relationships = new PackageRelationshipCollection(this);
}
}
/**
* Implementation of the getRelationships method().
*
* @param filter
* Relationship type filter. If <i>null</i> then the filter is
* disabled and return all the relationships.
* @return All relationships from this part that have the specified type.
* @throws InvalidFormatException
* Throws if an error occurs during parsing the relationships
* part.
* @throws InvalidOperationException
* Throws if the package is open en write only mode.
* @see #getRelationshipsByType(String)
*/
private PackageRelationshipCollection GetRelationshipsCore(String filter)
{
this._container.ThrowExceptionIfWriteOnly();
if (_relationships == null)
{
this.ThrowExceptionIfRelationship();
_relationships = new PackageRelationshipCollection(this);
}
return(new PackageRelationshipCollection(_relationships, filter));
}
/**
* Copy constructor.
*
* This collection will contain only elements from the specified collection
* for which the type is compatible with the specified relationship type
* filter.
*
* @param coll
* Collection to import.
* @param filter
* Relationship type filter.
*/
public PackageRelationshipCollection(PackageRelationshipCollection coll,
String filter)
: this()
{
foreach (PackageRelationship rel in coll.relationshipsByID.Values)
{
if (filter == null || rel.RelationshipType.Equals(filter))
{
AddRelationship(rel);
}
}
}
