@Override public Value value(final QueryContext ctx) throws QueryException { final int o = (int) ctx.resources.output.size(); final Updates updates = ctx.resources.updates(); final ContextModifier tmp = updates.mod; final TransformModifier pu = new TransformModifier(); updates.mod = pu; try { for (final Let fo : copies) { final Iter ir = ctx.iter(fo.expr); Item i = ir.next(); if (!(i instanceof ANode) || ir.next() != null) throw UPCOPYMULT.get(fo.info, fo.var.name); // copy node to main memory data instance i = ((ANode) i).dbCopy(ctx.context.options); // add resulting node to variable ctx.set(fo.var, i, info); pu.addData(i.data()); } final Value v = ctx.value(expr[0]); if (!v.isEmpty()) throw BASEX_MOD.get(info); updates.prepare(); updates.apply(); return ctx.value(expr[1]); } finally { ctx.resources.output.size(o); updates.mod = tmp; } }
/** * Checks if the predicates are successful for the specified item. * * @param it item to be checked * @param qc query context * @return result of check * @throws QueryException query exception */ protected final boolean preds(final Item it, final QueryContext qc) throws QueryException { if (preds.length == 0) return true; // set context value and position final Value cv = qc.value; try { if (qc.scoring) { double s = 0; for (final Expr p : preds) { qc.value = it; final Item i = p.test(qc, info); if (i == null) return false; s += i.score(); } it.score(Scoring.avg(s, preds.length)); } else { for (final Expr p : preds) { qc.value = it; if (p.test(qc, info) == null) return false; } } return true; } finally { qc.value = cv; } }
/** * Checks two keys for equality. * * @param its1 first keys * @param its2 second keys * @param coll collations * @return {@code true} if the compare as equal, {@code false} otherwise * @throws QueryException query exception */ private boolean eq(final Item[] its1, final Item[] its2, final Collation[] coll) throws QueryException { final int il = its1.length; for (int i = 0; i < il; i++) { final Item it1 = its1[i], it2 = its2[i]; if (it1 == null ^ it2 == null || it1 != null && !it1.equiv(it2, coll[i], info)) return false; } return true; }
/** * Performs the assert-equals function. * * @param ctx query context * @return resulting value * @throws QueryException query exception */ private Item assertEquals(final QueryContext ctx) throws QueryException { final byte[] str = expr.length < 3 ? null : checkStr(expr[2], ctx); final Iter iter1 = ctx.iter(expr[0]), iter2 = ctx.iter(expr[1]); final Compare comp = new Compare(info); Item it1, it2; int c = 1; while (true) { it1 = iter1.next(); it2 = iter2.next(); final boolean empty1 = it1 == null, empty2 = it2 == null; if (empty1 && empty2) return null; if (empty1 || empty2 || !comp.deep(it1.iter(), it2.iter())) break; c++; } if (str != null) throw UNIT_MESSAGE.get(info, str); throw new UnitException(info, UNIT_ASSERT_EQUALS, it1, it2, c); }
@Override public Item item(final QueryContext qc, final InputInfo ii) throws QueryException { // compute scoring if (qc.scoring) { double s = 0; boolean f = false; for (final Expr expr : exprs) { final Item it = expr.ebv(qc, info); f |= it.bool(ii); s += it.score(); } return Bln.get(f, Scoring.avg(s, exprs.length)); } // standard evaluation for (final Expr expr : exprs) { if (expr.ebv(qc, info).bool(ii)) return Bln.TRUE; } return Bln.FALSE; }