/** Tests the specified instance. */
@Test
public void test() {
final StringBuilder sb = new StringBuilder();
int fail = 0;
for (final Object[] qu : queries) {
final boolean correct = qu.length == 3;
final String query = qu[correct ? 2 : 1].toString();
final Value cmp = correct ? (Value) qu[1] : null;
final QueryProcessor qp = new QueryProcessor(query, context);
try {
final Value val = qp.value();
if (!correct || !new DeepCompare().equal(val, cmp)) {
sb.append("[" + qu[0] + "] " + query);
String s = correct && cmp.size() != 1 ? "#" + cmp.size() : "";
sb.append("\n[E" + s + "] ");
if (correct) {
final String cp = cmp.toString();
sb.append('\'');
sb.append(cp.length() > 1000 ? cp.substring(0, 1000) + "..." : cp);
sb.append('\'');
} else {
sb.append("error");
}
final TokenBuilder types = new TokenBuilder();
for (final Item it : val) types.add(it.type.toString()).add(" ");
s = val.size() == 1 ? "" : "#" + val.size();
sb.append("\n[F" + s + "] '" + val + "', " + types + details() + '\n');
++fail;
}
} catch (final Exception ex) {
final String msg = ex.getMessage();
if (correct || msg == null || msg.contains("mailman")) {
final String cp = correct && cmp.data() != null ? cmp.toString() : "()";
sb.append(
"["
+ qu[0]
+ "] "
+ query
+ "\n[E] "
+ cp
+ "\n[F] "
+ (msg == null ? Util.className(ex) : msg.replaceAll("\r\n?|\n", " "))
+ ' '
+ details()
+ '\n');
ex.printStackTrace();
++fail;
}
} finally {
qp.close();
}
}
if (fail != 0) fail(fail + " Errors. [E] = expected, [F] = found:\n" + sb.toString().trim());
}
/**
* Computes the number of results.
*
* @param qc query context (may be @code null)
* @return number of results
*/
private long size(final QueryContext qc) {
final Value rt = initial(qc);
// skip computation if value is not a document node
if (rt == null || rt.type != NodeType.DOC) return -1;
final Data data = rt.data();
// skip computation if no database instance is available, is out-of-date or
// if context does not contain all database nodes
if (data == null || !data.meta.uptodate || data.resources.docs().size() != rt.size()) return -1;
ArrayList<PathNode> nodes = data.paths.root();
long m = 1;
final int sl = steps.length;
for (int s = 0; s < sl; s++) {
final Step curr = axisStep(s);
if (curr != null) {
nodes = curr.nodes(nodes, data);
if (nodes == null) return -1;
} else if (s + 1 == sl) {
m = steps[s].size();
} else {
// stop if a non-axis step is not placed last
return -1;
}
}
long sz = 0;
for (final PathNode pn : nodes) sz += pn.stats.count;
return sz * m;
}
/**
* Returns the root of the current context or {@code null}.
*
* @param ctx query context
* @return root
*/
final Value root(final QueryContext ctx) {
final Value v = ctx != null ? ctx.value : null;
// no root specified: return context, if it does not reference a document
// as e.g. happens in //a(b|c)
if (root == null) return v == null || v.type != NodeType.DOC ? v : null;
// root is value: return root
if (root.isValue()) return (Value) root;
// no root reference, no context: return null
if (!(root instanceof Root) || v == null) return null;
// return context sequence or root of current context
return v.size() == 1 ? Root.root(v) : v;
}
/**
* Returns a document test. This test will be called by {@link AxisPath#index} if the context
* value only consists of database nodes.
*
* @param rt root value
* @return document test
*/
static Test get(final Value rt) {
// use simple test if database contains only one document
final Data data = rt.data();
if (data.meta.ndocs == 1) return Test.DOC;
// adopt nodes from existing sequence
if (rt instanceof DBNodeSeq) {
final DBNodeSeq seq = (DBNodeSeq) rt;
return seq.all() ? Test.DOC : new InvDocTest(new IntList(seq.pres()), data);
}
// loop through all documents and add pre values of documents
// not more than 2^31 documents supported
final IntList il = new IntList((int) rt.size());
for (final Item it : rt) il.add(((DBNode) it).pre());
return new InvDocTest(il, data);
}
@Override
protected Expr opt(final CompileContext cc) throws QueryException {
if (allAreValues() && exprs[0].size() < UNROLL_LIMIT) {
// unroll the loop
cc.info(QueryText.OPTUNROLL_X, this);
final Value seq = (Value) exprs[0];
final int len = (int) seq.size();
// fn:for-each(...)
final Expr[] results = new Expr[len];
for (int i = 0; i < len; i++) {
results[i] = new DynFuncCall(info, sc, exprs[1], seq.itemAt(i)).optimize(cc);
}
return new List(info, results).optimize(cc);
}
return this;
}
