public final void makePointer(VariablePath rightPath) {
Pair<Expression, Expression> pair;
ValueVector currVector;
Value currValue = getRootValue();
int index;
String keyStr;
for (int i = 0; i < path.length; i++) {
pair = path[i];
keyStr = pair.key().evaluate().strValue();
currVector = currValue.getChildren(keyStr);
if (pair.value() == null) {
if ((i + 1) < path.length) {
currValue = currVector.get(0);
} else { // We're finished
currValue.children().put(keyStr, ValueVector.createLink(rightPath));
}
} else {
index = pair.value().evaluate().intValue();
if ((i + 1) < path.length) {
currValue = currVector.get(index);
} else {
currVector.set(index, Value.createLink(rightPath));
}
}
}
}
public final void undef() {
Pair<Expression, Expression> pair = null;
ValueVector currVector = null;
Value currValue = getRootValue();
int index;
String keyStr;
for (int i = 0; i < path.length; i++) {
pair = path[i];
keyStr = pair.key().evaluate().strValue();
currVector = currValue.children().get(keyStr);
if (currVector == null) {
return;
} else if (currVector.size() < 1) {
if (currVector.isLink()) {
currValue.children().remove(keyStr);
}
return;
}
if (pair.value() == null) {
if ((i + 1) < path.length) {
currValue = currVector.get(0);
} else { // We're finished
currValue.children().remove(keyStr);
}
} else {
index = pair.value().evaluate().intValue();
if ((i + 1) < path.length) {
if (currVector.size() <= index) {
return;
}
currValue = currVector.get(index);
} else {
if (currVector.size() > index) {
currVector.remove(index);
}
}
}
}
}
public final Value getValueOrNull(Value rootValue) {
Pair<Expression, Expression> pair = null;
ValueVector currVector = null;
Value currValue = rootValue;
int index;
for (int i = 0; i < path.length; i++) {
pair = path[i];
currVector = currValue.children().get(pair.key().evaluate().strValue());
if (currVector == null) {
return null;
}
if (pair.value() == null) {
if ((i + 1) < path.length) {
if (currVector.isEmpty()) {
return null;
}
currValue = currVector.get(0);
} else { // We're finished
if (currVector.isEmpty()) {
return null;
} else {
return currVector.get(0);
}
}
} else {
index = pair.value().evaluate().intValue();
if (currVector.size() <= index) {
return null;
}
currValue = currVector.get(index);
if ((i + 1) >= path.length) {
return currValue;
}
}
}
return currValue;
}
