@Override
public final Expr inline(final QueryContext ctx, final VarScope scp, final Var v, final Expr e)
throws QueryException {
final Value oldVal = ctx.value;
try {
ctx.value = root(ctx);
final Expr rt = root == null ? null : root.inline(ctx, scp, v, e);
if (rt != null) {
setRoot(ctx, rt);
ctx.value = oldVal;
ctx.value = root(ctx);
}
boolean change = rt != null;
for (int i = 0; i < steps.length; i++) {
final Expr nw = steps[i].inline(ctx, scp, v, e);
if (nw != null) {
steps[i] = nw;
change = true;
}
}
return change ? optimize(ctx, scp) : null;
} finally {
ctx.value = oldVal;
}
}
@Override
public final Expr inline(final QueryContext qc, final VarScope scp, final Var var, final Expr ex)
throws QueryException {
boolean changed = false;
if (root != null) {
final Expr rt = root.inline(qc, scp, var, ex);
if (rt != null) {
root = rt;
changed = true;
}
}
final int sl = steps.length;
for (int s = 0; s < sl; s++) {
final Expr nw = steps[s].inline(qc, scp, var, ex);
if (nw != null) {
steps[s] = nw;
changed = true;
}
}
return changed ? optimize(qc, scp) : null;
}