public COSCompositeObject popContextObject() {
COSCompositeObject contextObject = contextStack[stackPtr--];
// enable encryption when no longer in encryption dict of file id's
if (contextObject == currentCosEncryption || contextObject == currentCosIDs) {
enabled = true;
}
if (contextObject instanceof COSStream) {
COSDictionary dict = contextObject.asStream().getDict();
if (dict != null
&& dict.get(STStreamXRefSection.DK_Type).equals(STStreamXRefSection.CN_Type_XRef)) {
// /XRef streams are not encrypted
enabled = true;
}
}
return contextObject;
}
public void pushContextObject(COSCompositeObject contextObject) {
stackPtr++;
if (stackPtr >= contextStack.length) {
COSCompositeObject[] tempStack = new COSCompositeObject[contextStack.length + 5];
System.arraycopy(contextStack, 0, tempStack, 0, contextStack.length);
contextStack = tempStack;
}
contextStack[stackPtr] = contextObject;
// do not encrypt within encryption dict and file id's
if (contextObject == currentCosEncryption || contextObject == currentCosIDs) {
enabled = false;
}
if (contextObject instanceof COSStream) {
COSDictionary dict = contextObject.asStream().getDict();
if (dict != null
&& dict.get(STStreamXRefSection.DK_Type).equals(STStreamXRefSection.CN_Type_XRef)) {
// /XRef streams are not encrypted
enabled = false;
}
}
}
