@Override
public ISecurityHandler getSecurityHandler(COSEncryption encryption) throws COSSecurityException {
COSName name = encryption.getFilter();
if (name == null) {
throw new COSSecurityException("security handler not specified"); // $NON-NLS-1$
}
if (name.equals(CN_Standard)) {
int revision = encryption.getFieldInt(DK_R, 0);
if (revision == 2) {
return new StandardSecurityHandlerR2();
} else if (revision == 3) {
return new StandardSecurityHandlerR3();
} else if (revision == 4) {
return new StandardSecurityHandlerR4();
} else {
return new StandardSecurityHandlerR2();
}
}
// maybe provide a registry some day
throw new COSSecurityException(
"no security handler '" //$NON-NLS-1$
+ name.stringValue()
+ "'"); //$NON-NLS-1$
}
/*
* (non-Javadoc)
*
* @see
* de.intarsys.pdf.cos.COSBasedObject.MetaClass#doDetermineClass(de.
* intarsys.pdf.cos.COSObject)
*/
@Override
protected COSBasedObject.MetaClass doDetermineClass(COSObject object) {
COSDictionary dict;
dict = object.asDictionary();
if (dict == null) {
throw new IllegalArgumentException("font object is not a COSDictionary as required");
}
COSName type = dict.get(DK_Type).asName();
if (type == null) {
throw new IllegalArgumentException("Dictionary has no type");
}
if (!type.equals(CN_Type_Font)) {
throw new IllegalArgumentException("type <" + type + "> is not a valid font type");
}
COSName subtype = dict.get(DK_Subtype).asName();
if (subtype == null) {
throw new IllegalArgumentException("font not identified by subtype");
}
if (subtype.equals(CN_Subtype_Type1)) {
return PDFontType1.META;
} else if (subtype.equals(CN_Subtype_TrueType)) {
if (dict.get(DK_FontDescriptor).isNull()) {
/*
* treat as if Type1 was specified, because that's probably
* what the creator meant; further processing would yield
* wrong results anyway as FontDescriptor is a required
* entry for TrueType fonts
*/
return PDFontType1.META;
}
return PDFontTrueType.META;
} else if (subtype.equals(CN_Subtype_MMType1)) {
return PDFontMMType1.META;
} else if (subtype.equals(CN_Subtype_Type0)) {
return PDFontType0.META;
} else if (subtype.equals(CN_Subtype_Type3)) {
return PDFontType3.META;
} else if (subtype.equals(CN_Subtype_CIDFontType0)) {
return CIDFontType0.META;
} else if (subtype.equals(CN_Subtype_CIDFontType2)) {
return CIDFontType2.META;
}
throw new IllegalArgumentException("font subtype <" + subtype + "> not supported");
}
