if (signatureFacets.isEmpty()) {
addSignatureFacet(new OOXMLSignatureFacet());
addSignatureFacet(new KeyInfoSignatureFacet());
addSignatureFacet(new XAdESSignatureFacet());
addSignatureFacet(new Office2010SignatureFacet());
}
for (SignatureFacet sf : signatureFacets) {
sf.setSignatureConfig(this);
}