/**
* An array of names indicating acceptable digest algorithms to use when signing. The value shall
* be one of <b>SHA1</b>, <b>SHA256</b>, <b>SHA384</b>, <b>SHA512</b>, <b>RIPEMD160</b>. The
* default value is implementation-specific.
*
* @return the digest method that shall be used by the signature handler
*/
public List<String> getDigestMethod() {
List<String> retval = null;
COSArray fields = (COSArray) dictionary.getDictionaryObject(COSName.DIGEST_METHOD);
if (fields != null) {
List<String> actuals = new ArrayList<String>();
for (int i = 0; i < fields.size(); i++) {
String element = fields.getName(i);
if (element != null) {
if (element != null) {
actuals.add(element);
}
}
}
retval = new COSArrayList(actuals, fields);
}
return retval;
}
/**
* If <b>SubFilter</b> is not null and the {@link #isSubFilterRequired()} indicates this entry is
* a required constraint, then the first matching encodings shall be used when signing; otherwise,
* signing shall not take place. If {@link #isSubFilterRequired()} indicates that this is an
* optional constraint, then the first matching encoding shall be used if it is available. If it
* is not available, a different encoding may be used instead.
*
* @return the subfilter that shall be used by the signature handler
*/
public List<String> getSubFilter() {
List<String> retval = null;
COSArray fields = (COSArray) dictionary.getDictionaryObject(COSName.SUBFILTER);
if (fields != null) {
List<String> actuals = new ArrayList<String>();
for (int i = 0; i < fields.size(); i++) {
String element = fields.getName(i);
if (element != null) {
if (element != null) {
actuals.add(element);
}
}
}
retval = new COSArrayList(actuals, fields);
}
return retval;
}
