/**
* (Optional, PDF 1.7) 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.
*
* <p>This property is only applicable if the digital credential signing contains RSA
* public/privat keys
*
* @param digestMethod is a list of possible names of the digests, that should be used for
* signing.
*/
public void setDigestMethod(List<COSName> digestMethod) {
// integrity check
for (COSName cosName : digestMethod) {
if (!(cosName.equals(COSName.DIGEST_SHA1)
|| cosName.equals(COSName.DIGEST_SHA256)
|| cosName.equals(COSName.DIGEST_SHA384)
|| cosName.equals(COSName.DIGEST_SHA512)
|| cosName.equals(COSName.DIGEST_RIPEMD160))) {
throw new IllegalArgumentException(
"Specified digest " + cosName.getName() + " isn't allowed.");
}
}
dictionary.setItem(COSName.DIGEST_METHOD, COSArrayList.converterToCOSArray(digestMethod));
}
/**
* Sets the child fields.
*
* @param children The list of child fields.
*/
public void setChildren(List<PDField> children) {
COSArray kidsArray = COSArrayList.converterToCOSArray(children);
getCOSObject().setItem(COSName.KIDS, kidsArray);
}
/**
* (Optional, PDF 1.6) An array of text strings that specifying possible legal attestations.
*
* @param legalAttestation is a list of possible text string that specifying possible legal
* attestations.
*/
public void setLegalAttestation(List<String> legalAttestation) {
dictionary.setItem(
COSName.LEGAL_ATTESTATION, COSArrayList.converterToCOSArray(legalAttestation));
}
/**
* (Optional) An array of text strings that specifying possible reasons for signing a document. If
* specified, the reasons supplied in this entry replace those used by conforming products.
*
* @param reasons is a list of possible text string that specifying possible reasons
*/
public void setReasonsd(List<String> reasons) {
dictionary.setItem(COSName.REASONS, COSArrayList.converterToCOSArray(reasons));
}
/**
* (Optional) An array of names indicating encodings to use when signing. The first name in the
* array that matches an encoding supported by the signature handler shall be the encoding that is
* actually used for signing.
*
* @param subfilter is the name that shall be used for encoding
*/
public void setSubFilter(List<COSName> subfilter) {
dictionary.setItem(COSName.SUBFILTER, COSArrayList.converterToCOSArray(subfilter));
}
/**
* This will set the next action, or sequence of actions, to be performed after this one. The
* value is either a single action dictionary or an array of action dictionaries to be performed
* in order.
*
* @param next The Next action or sequence of actions.
*/
public void setNext(List next) {
action.setItem("Next", COSArrayList.converterToCOSArray(next));
}
