public Serializable fromDOM(Document document) {
ContextFreePumpingLemma pl =
(ContextFreePumpingLemma)
PumpingLemmaFactory.createPumpingLemma(
TYPE, document.getElementsByTagName(LEMMA_NAME).item(0).getTextContent());
/*
* Decode m, w, & i.
*/
pl.setM(Integer.parseInt(document.getElementsByTagName(M_NAME).item(0).getTextContent()));
pl.setW(document.getElementsByTagName(W_NAME).item(0).getTextContent());
pl.setI(Integer.parseInt(document.getElementsByTagName(I_NAME).item(0).getTextContent()));
/*
* Decode cases.
*
* Must decode cases before decoding the decomposition, otherwise
* the decomposition will be that of the last case. This is because,
* when add case is called, the pumping lemma chooses the decomposition
* to check if it's legal.
*/
readCases(document, pl);
// Decode the attempts
NodeList attempts = document.getDocumentElement().getElementsByTagName(ATTEMPT);
for (int i = 0; i < attempts.getLength(); i++) pl.addAttempt(attempts.item(i).getTextContent());
// Decode the first player.
pl.setFirstPlayer(document.getElementsByTagName(FIRST_PLAYER).item(0).getTextContent());
// Decode the decomposition.
int uLength = Integer.parseInt(document.getElementsByTagName(U_NAME).item(0).getTextContent());
int vLength = Integer.parseInt(document.getElementsByTagName(V_NAME).item(0).getTextContent());
int xLength = Integer.parseInt(document.getElementsByTagName(X_NAME).item(0).getTextContent());
int yLength = Integer.parseInt(document.getElementsByTagName(Y_NAME).item(0).getTextContent());
pl.setDecomposition(new int[] {uLength, vLength, xLength, yLength});
// Return!
return pl;
}
protected void readCases(Document doc, ContextFreePumpingLemma pl) {
NodeList caseNodes = doc.getDocumentElement().getElementsByTagName(CASE_NAME);
for (int i = 0; i < caseNodes.getLength(); i++) {
Node caseNode = caseNodes.item(i);
if (caseNode.getNodeType() != Node.ELEMENT_NODE) continue;
int u =
Integer.parseInt(
((Element) caseNode).getElementsByTagName(CASE_U_NAME).item(0).getTextContent());
int v =
Integer.parseInt(
((Element) caseNode).getElementsByTagName(CASE_V_NAME).item(0).getTextContent());
int x =
Integer.parseInt(
((Element) caseNode).getElementsByTagName(CASE_X_NAME).item(0).getTextContent());
int y =
Integer.parseInt(
((Element) caseNode).getElementsByTagName(CASE_Y_NAME).item(0).getTextContent());
int j =
Integer.parseInt(
((Element) caseNode).getElementsByTagName(CASE_I_NAME).item(0).getTextContent());
pl.addCase(new int[] {u, v, x, y}, j);
}
}