Examples with Mapping catdata.aql.Mapping used on opensource projects

Example 1 with Mapping

use of catdata.aql.Mapping in project fql by CategoricalData.

the class MapExpRaw method eval.

@Override
public Mapping<Ty, En, Sym, Fk, Att, En, Fk, Att> eval(AqlEnv env) {
    Schema<Ty, En, Sym, Fk, Att> src0 = src.eval(env);
    Schema<Ty, En, Sym, Fk, Att> dst0 = dst.eval(env);
    // Collage<String, String, String, String, String, Void, Void> scol =
    // new Collage<>(src0);
    Collage<Ty, En, Sym, Fk, Att, Void, Void> dcol = new Collage<>(dst0.collage());
    Map<En, En> ens0 = new HashMap<>();
    // Map<String, Pair<String, List<String>>> fks0 = new HashMap<>();
    Map<Att, Triple<Var, En, Term<Ty, En, Sym, Fk, Att, Void, Void>>> atts0 = new HashMap<>();
    Map<Fk, Pair<En, List<Fk>>> fksX = new HashMap<>();
    for (String k : imports) {
        @SuppressWarnings("unchecked") Mapping<Ty, En, Sym, Fk, Att, En, Fk, Att> v = env.defs.maps.get(k);
        Util.putAllSafely(ens0, v.ens.map);
        Util.putAllSafely(fksX, v.fks.map);
        Util.putAllSafely(atts0, v.atts.map);
    }
    Util.putAllSafely(ens0, Util.toMapSafely(ens.stream().map(x -> new Pair<>(new En(x.first), new En(x.second))).collect(Collectors.toList())));
    for (En k : ens0.keySet()) {
        if (!dst0.ens.contains(ens0.get(k))) {
            throw new LocException(find("entities", new Pair<>(k, ens0.get(k))), "The mapping for " + k + ", namely " + ens0.get(k) + ", does not appear in the target schema");
        } else if (!src0.ens.contains(k)) {
            throw new LocException(find("entities", new Pair<>(k, ens0.get(k))), k + " does not appear in the source schema");
        }
    }
    for (Pair<Pair<String, String>, List<String>> p : this.fks) {
        Fk theFk = new Fk(new En(p.first.first), p.first.second);
        if (!src0.fks.containsKey(theFk)) {
            throw new RuntimeException("Not a foreign key in source: " + theFk.en + "." + theFk.str);
        }
        try {
            En start_en_fixed = ens0.get(new En(p.first.first));
            En start_en = ens0.get(new En(p.first.first));
            List<Fk> r = new LinkedList<>();
            for (String o : p.second) {
                if (ens0.containsValue(new En(o))) {
                    if (fksX.containsKey(new Fk(start_en, o))) {
                        throw new RuntimeException(o + " is both a target foreign key and a target entity, so the path is ambiguous");
                    }
                // if (start_en == null) {
                // start_en = new En(p.second.get(0));
                // }
                } else {
                    /*
						 * if (start_en == null) { Pair<En, En> j =
						 * dst0.fks.get(new Fk(o)); if (j == null) { throw new
						 * RuntimeException(p.second.get(0) +
						 * " is not a foreign key in the target"); } start_en =
						 * j.first; }
						 */
                    // }
                    r.add(new Fk(start_en, o));
                    start_en = dst0.fks.get(new Fk(start_en, o)).second;
                }
            }
            // if (start_en == null) {
            // throw new RuntimeException("Anomaly: please report");
            // }
            fksX.put(new Fk(new En(p.first.first), p.first.second), new Pair<>(start_en_fixed, r));
        } catch (RuntimeException ex) {
            ex.printStackTrace();
            throw new LocException(fkPos.get(new Fk(new En(p.first.first), p.first.second)), "In foreign key mapping " + p.first + " -> " + Util.sep(p.second, ".") + ", " + ex.getMessage());
        }
    }
    for (Pair<Pair<String, String>, Triple<String, String, RawTerm>> att : atts) {
        try {
            String var = att.second.first;
            String var_en = att.second.second;
            RawTerm term = att.second.third;
            Pair<En, Ty> p = src0.atts.map.get(new Att(new En(att.first.first), att.first.second));
            if (p == null) {
                throw new RuntimeException(att.first + " is not a source attribute.");
            }
            En src_att_dom_en = p.first;
            En dst_att_dom_en = ens0.get(src_att_dom_en);
            if (dst_att_dom_en == null) {
                throw new RuntimeException("no entity mapping for " + src_att_dom_en + " , required for domain for " + att.first);
            }
            if (var_en != null && !new En(var_en).equals(dst_att_dom_en)) {
                throw new RuntimeException("the given source entity for the variable, " + var_en + ", is not " + dst_att_dom_en + " as expected.");
            }
            Ty src_att_cod_ty = p.second;
            if (!dst0.typeSide.tys.contains(src_att_cod_ty)) {
                throw new RuntimeException("type " + p.second + " does not exist in target typeside.");
            }
            Chc<Ty, En> proposed_ty2 = Chc.inLeft(src_att_cod_ty);
            Chc<Ty, En> var_en2 = Chc.inRight(dst_att_dom_en);
            Map<String, Chc<Ty, En>> ctx = Util.singMap(var, var_en2);
            Term<Ty, En, Sym, Fk, Att, Gen, Sk> term0 = RawTerm.infer1x(ctx, term, null, proposed_ty2, dcol.convert(), "", src0.typeSide.js).second;
            Util.putSafely(atts0, new Att(new En(att.first.first), att.first.second), new Triple<>(new Var(var), dst_att_dom_en, term0.convert()));
        } catch (RuntimeException ex) {
            ex.printStackTrace();
            throw new LocException(attPos.get(new Att(new En(att.first.first), att.first.second)), "in mapping for " + att.first + ", " + ex.getMessage());
        }
    }
    AqlOptions ops = new AqlOptions(options, null, env.defaults);
    Mapping<Ty, En, Sym, Fk, Att, En, Fk, Att> ret = new Mapping<>(ens0, atts0, fksX, src0, dst0, (Boolean) ops.getOrDefault(AqlOption.dont_validate_unsafe));
    return ret;
}