protected internal int computeContextSize4PrecedingSibling2(Predicate p, VTDNav vn)
{
int i=0;
vn.push2();
while(vn.toNode(VTDNav.PREV_SIBLING)){
if (currentStep.eval2(vn,p)){
i++;
}
}
vn.pop2();
currentStep.resetP(vn,p);
currentStep.out_of_range=false;
//currentStep.o = ap;
return i;
}
protected internal int process_ancestor2( VTDNav vn)
{
int result;
bool b = false, b1 = false;
//int contextSize;
Predicate t= null;
switch(state){
case START:
t = currentStep.p;
while (t != null) {
if (t.requireContext) {
int i = computeContextSize( t, vn);
if (i == 0) {
b1 = true;
break;
} else
t.ContextSize=(i);
}
t = t.nextP;
}
if (b1) {
state = END;
break;
}
state = END;
//if (vn.getCurrentDepth() != -1) {
vn.push2();
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
break;
} else {
//vn.pop();
state = TERMINAL;
result = vn.getCurrentIndex2();
if (isUnique(result))
return result;
}
}
}
if (state == END) {
if (currentStep.hasPredicate)
currentStep.resetP(vn);
vn.pop2();
}
// }
break;
case END:
currentStep =null;
// reset();
return -1;
case FORWARD:
t = currentStep.p;
while(t!=null){
if (t.requireContext){
int i = computeContextSize(t,vn);
if (i==0){
b1 = true;
break;
}else
t.ContextSize=(i);
}
t = t.nextP;
}
if (b1){
currentStep = currentStep.prevS;
state = BACKWARD;
break;
}
state = BACKWARD;
vn.push2();
while(vn.toNode(VTDNav.P)){
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))){
if (currentStep.nextS != null){
state = FORWARD;
currentStep = currentStep.nextS;
break;
}
else {
//vn.pop();
state = TERMINAL;
result = vn.getCurrentIndex2();
if ( isUnique(result))
return result;
}
}
}
if ( state == BACKWARD){
if (currentStep.hasPredicate)
currentStep.resetP(vn);
vn.pop2();
currentStep=currentStep.prevS;
}
break;
case BACKWARD:
b = false;
//vn.push2();
if (currentStep.out_of_range)
{
currentStep.out_of_range = false;
transition_ancestor(vn);
break;
}
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS!= null) {
state = FORWARD;
currentStep = currentStep.nextS;
b = true;
break;
} else {
//vn.pop();
state = TERMINAL;
result = vn.getCurrentIndex2();
if ( isUnique(result))
return result;
}
}
}
if (b==false){
currentStep.out_of_range = false;
transition_ancestor(vn);
}
break;
case TERMINAL:
if (currentStep.out_of_range)
{
currentStep.out_of_range = false;
transition_ancestor(vn);
break;
}
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
result = vn.getCurrentIndex2();
if ( isUnique(result))
return result;
}
}
currentStep.out_of_range = false;
transition_ancestor(vn);
break;
default:
throw new XPathEvalException("unknown state");
}
return -2;
}
protected internal int computeContextSize4Child2(Predicate p, VTDNav vn)
{
int i=0;
bool b = vn.toNode(VTDNav.FIRST_CHILD);
if (b) {
do {
if (currentStep.eval2(vn, p)) {
i++;
}
} while (vn.toNode(VTDNav.NS));
vn.toNode(VTDNav.PARENT);
currentStep.resetP(vn,p);
currentStep.out_of_range=false;
return i;
} else
return 0;
}
protected internal int computeContextSize4AncestorOrSelf2(Predicate p, VTDNav vn)
{
int i=0;
AutoPilot ap = (AutoPilot)currentStep.o;
vn.push2();
i = 0;
do {
if (currentStep.eval2(vn, p)) {
i++;
}
}while(vn.toNode(VTDNav.PARENT));
vn.pop2();
currentStep.resetP(vn,p);
currentStep.out_of_range=false;
currentStep.o = ap;
return i;
}
protected internal int process_parent2(VTDNav vn)
{
bool b1 = false;
Predicate t= null;
int result;
switch ( state) {
case START:
case FORWARD:
t = currentStep.p;
while(t!=null){
if (t.requireContext){
int i = computeContextSize(t,vn);
if (i==0){
b1 = true;
break;
}else
t.ContextSize=(i);
}
t = t.nextP;
}
if (b1){
if (state == FORWARD){
state = BACKWARD;
currentStep = currentStep.prevS;
}else
state = END;
break;
}
if (vn.getCurrentDepth() == -1) {
if ( state == START)
state = END;
else {
//vn.pop();
state = BACKWARD;
currentStep = currentStep.prevS;
}
} else {
vn.push2();
vn.toNode(VTDNav.P); // must return true
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))){
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
} else {
state = TERMINAL;
result = vn.getCurrentIndex2();
if ( isUnique(result))
return result;
}
}else{
vn.pop2();
if (currentStep.hasPredicate)
currentStep.resetP(vn);
if ( state == START)
state = END;
else {
state = BACKWARD;
currentStep = currentStep.prevS;
}
}
}
break;
case END:
currentStep = null;
// reset();
return -1;
case BACKWARD:
case TERMINAL:
if (currentStep.prevS == null) {
vn.pop2();
state = END;
break;
}else {
vn.pop2();
state = BACKWARD;
currentStep = currentStep.prevS;
break;
}
default:
throw new XPathEvalException("unknown state");
}
return -2;
}
protected internal int process_child2(VTDNav vn)
{
int result;
bool b = false, b1 = false;
Predicate t= null;
switch(state){
case START:
// first search for any predicate that
// requires contextSize
// if so, compute its context size
// if size > 0
// set context
// if size ==0
// immediately set the state to backward or end
t = currentStep.p;
while (t != null) {
if (t.requireContext) {
int i = computeContextSize(t, vn);
if (i == 0) {
b1 = true;
break;
} else
t.ContextSize=(i);
}
t = t.nextP;
}
if (b1) {
state = END;
break;
}
b = vn.toNode(VTDNav.FIRST_CHILD);
state = END;
if (b) {
do {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
// currentStep.position++;
state = FORWARD;
currentStep = currentStep.nextS;
} else {
state = TERMINAL;
result = vn.getCurrentIndex();
if (isUnique(result)) {
return result;
}
}
break;
}
} while (vn.toNode(VTDNav.NS));
if (state == END)
vn.toNode(VTDNav.PARENT);
}
break;
case END:
currentStep = null;
// reset();
return -1;
case FORWARD:
t = currentStep.p;
while (t != null) {
if (t.requireContext) {
int i = computeContextSize(t, vn);
if (i == 0) {
b1 = true;
break;
} else
t.ContextSize=(i);
}
t = t.nextP;
}
if (b1) {
currentStep = currentStep.prevS;
state = BACKWARD;
break;
}
state = BACKWARD;
if (vn.toNode(VTDNav.FC)) {
do {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
} else {
state = TERMINAL;
result = vn.getCurrentIndex();
if (isUnique(result))
return result;
}
goto forward;
}
} while (vn.toNode(VTDNav.NS));
vn.toNode(VTDNav.P);
if (currentStep.hasPredicate)
currentStep.resetP(vn);
currentStep = currentStep.prevS;
} else {
// vn.toElement(VTDNav.P);
currentStep = currentStep.prevS;
}
forward:
break;
case BACKWARD:
if (currentStep.out_of_range){
currentStep.out_of_range = false;
transition_child(vn);
break;
}
// currentStep = currentStep.prevS;
//b = false;
while (vn.toNode(VTDNav.NS)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
b = true;
break;
}
}
if (b) {
state = FORWARD;
currentStep = currentStep.nextS;
} else{
currentStep.out_of_range = false;
transition_child(vn);
}
break;
case TERMINAL:
if (currentStep.out_of_range){
currentStep.out_of_range = false;
transition_child(vn);
break;
}
while (vn.toNode(VTDNav.NS)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
// state = TERMINAL;
result = vn.getCurrentIndex();
if (isUnique(result))
return result;
}
}
currentStep.out_of_range = false;
transition_child(vn);
break;
default:
throw new XPathEvalException("unknown state");
}
return -2;
}
protected internal int process_ancestor_or_self2(VTDNav vn)
{
bool b = false, b1 = false;
Predicate t= null;
int result;
switch ( state) {
case START:
t = currentStep.p;
while (t != null) {
if (t.requireContext) {
int i = computeContextSize( t, vn);
if (i == 0) {
b1 = true;
break;
} else
t.ContextSize = i ;
}
t = t.nextP;
}
if (b1) {
state = END;
break;
}
state = END;
vn.push2();
if (currentStep.ft){
currentStep.ft = false;
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
break;
} else {
//vn.pop();
state = TERMINAL;
if (vn.atTerminal)
result = vn.LN;
else
result = vn.getCurrentIndex();
if ( isUnique(result))
return result;
}
}
}
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
break;
} else {
//vn.pop();
state = TERMINAL;
result = vn.getCurrentIndex();
if ( isUnique(result))
return result;
}
}
}
if ( state == END) {
if (currentStep.hasPredicate)
currentStep.resetP(vn);
vn.pop2();
}
break;
case FORWARD:
t = currentStep.p;
while(t!=null){
if (t.requireContext){
int i = computeContextSize(t,vn);
if (i==0){
b1 = true;
break;
}else
t.ContextSize=i;
}
t = t.nextP;
}
if (b1){
currentStep = currentStep.prevS;
state = BACKWARD;
break;
}
state = BACKWARD;
vn.push2();
if (currentStep.ft ) {
currentStep.ft = false;
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
break;
} else {
//vn.pop();
state = TERMINAL;
if (vn.atTerminal)
result = vn.LN;
else
result = vn.getCurrentIndex();
if ( isUnique(result))
return result;
}
}
}
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
break;
} else {
//vn.pop();
state = TERMINAL;
result = vn.getCurrentIndex();
if ( isUnique(result))
return result;
}
}
}
if ( state == BACKWARD) {
if (currentStep.hasPredicate)
currentStep.resetP(vn);
currentStep.ft = true;
vn.pop2();
currentStep = currentStep.prevS;
}
break;
case END:
currentStep = null;
// reset();
return -1;
case BACKWARD:
//b = false;
vn.push2();
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
if (currentStep.nextS != null) {
state = FORWARD;
currentStep = currentStep.nextS;
b = true;
break;
} else {
//vn.pop();
state = TERMINAL;
result = vn.getCurrentIndex();
if ( isUnique(result))
return result;
}
}
}
if (b == false) {
vn.pop2();
if (currentStep.hasPredicate)
currentStep.resetP(vn);
if (currentStep.prevS != null) {
currentStep.ft = true;
state = BACKWARD;
currentStep = currentStep.prevS;
} else {
state = END;
}
}
break;
case TERMINAL:
while (vn.toNode(VTDNav.P)) {
if ((currentStep.nt_eval || currentStep.nt.eval2(vn))
&& ((!currentStep.hasPredicate) || currentStep.evalPredicates(vn))) {
result = vn.getCurrentIndex();
if ( isUnique(result))
return result;
}
}
vn.pop2();
if (currentStep.hasPredicate)
currentStep.resetP(vn);
if (currentStep.prevS!=null) {
currentStep.ft = true;
state = BACKWARD;
currentStep = currentStep.prevS;
}
else {
state = END;
}
break;
default:
throw new XPathEvalException("unknown state");
}
return -2;
}
