Examples with Term com.googlecode.prolog_cafe.lang.Term used on opensource projects

Example 1 with Term

use of com.googlecode.prolog_cafe.lang.Term in project gerrit by GerritCodeReview.

the class AbstractCommitUserIdentityPredicate method exec.

protected Operation exec(Prolog engine, UserIdentity userId) throws PrologException {
    engine.setB0();
    Term a1 = arg1.dereference();
    Term a2 = arg2.dereference();
    Term a3 = arg3.dereference();
    Term idTerm;
    Term nameTerm = Prolog.Nil;
    Term emailTerm = Prolog.Nil;
    Account.Id id = userId.getAccount();
    if (id == null) {
        idTerm = anonymous;
    } else {
        idTerm = new IntegerTerm(id.get());
    }
    String name = userId.getName();
    if (name != null && !name.equals("")) {
        nameTerm = SymbolTerm.create(name);
    }
    String email = userId.getEmail();
    if (email != null && !email.equals("")) {
        emailTerm = SymbolTerm.create(email);
    }
    if (!a1.unify(new StructureTerm(user, idTerm), engine.trail)) {
        return engine.fail();
    }
    if (!a2.unify(nameTerm, engine.trail)) {
        return engine.fail();
    }
    if (!a3.unify(emailTerm, engine.trail)) {
        return engine.fail();
    }
    return cont;
}

Example 2 with Term

use of com.googlecode.prolog_cafe.lang.Term in project gerrit by GerritCodeReview.

the class PRED__check_user_label_3 method exec.

@Override
public Operation exec(Prolog engine) throws PrologException {
    engine.setB0();
    Term a1 = arg1.dereference();
    Term a2 = arg2.dereference();
    Term a3 = arg3.dereference();
    if (a1 instanceof VariableTerm) {
        throw new PInstantiationException(this, 1);
    }
    if (!(a1 instanceof SymbolTerm)) {
        throw new IllegalTypeException(this, 1, "atom", a1);
    }
    String label = a1.name();
    if (a2 instanceof VariableTerm) {
        throw new PInstantiationException(this, 2);
    }
    if (!(a2 instanceof JavaObjectTerm) || !a2.convertible(CurrentUser.class)) {
        throw new IllegalTypeException(this, 2, "CurrentUser)", a2);
    }
    CurrentUser user = (CurrentUser) ((JavaObjectTerm) a2).object();
    if (a3 instanceof VariableTerm) {
        throw new PInstantiationException(this, 3);
    }
    if (!(a3 instanceof IntegerTerm)) {
        throw new IllegalTypeException(this, 3, "integer", a3);
    }
    short val = (short) ((IntegerTerm) a3).intValue();
    try {
        ChangeData cd = StoredValues.CHANGE_DATA.get(engine);
        LabelType type = cd.getLabelTypes().byLabel(label);
        if (type == null) {
            return engine.fail();
        }
        StoredValues.PERMISSION_BACKEND.get(engine).user(user).change(cd).check(new LabelPermission.WithValue(type, val));
        return cont;
    } catch (OrmException err) {
        throw new JavaException(this, 1, err);
    } catch (AuthException err) {
        return engine.fail();
    } catch (PermissionBackendException err) {
        SystemException se = new SystemException(err.getMessage());
        se.initCause(err);
        throw se;
    }
}

Example 3 with Term

use of com.googlecode.prolog_cafe.lang.Term in project gerrit by GerritCodeReview.

the class PRED__user_label_range_4 method exec.

@Override
public Operation exec(Prolog engine) throws PrologException {
    engine.setB0();
    Term a1 = arg1.dereference();
    Term a2 = arg2.dereference();
    Term a3 = arg3.dereference();
    Term a4 = arg4.dereference();
    if (a1 instanceof VariableTerm) {
        throw new PInstantiationException(this, 1);
    }
    if (!(a1 instanceof SymbolTerm)) {
        throw new IllegalTypeException(this, 1, "atom", a1);
    }
    String label = a1.name();
    if (a2 instanceof VariableTerm) {
        throw new PInstantiationException(this, 2);
    }
    if (!(a2 instanceof JavaObjectTerm) || !a2.convertible(CurrentUser.class)) {
        throw new IllegalTypeException(this, 2, "CurrentUser)", a2);
    }
    CurrentUser user = (CurrentUser) ((JavaObjectTerm) a2).object();
    Set<LabelPermission.WithValue> can;
    try {
        ChangeData cd = StoredValues.CHANGE_DATA.get(engine);
        LabelType type = cd.getLabelTypes().byLabel(label);
        if (type == null) {
            return engine.fail();
        }
        can = StoredValues.PERMISSION_BACKEND.get(engine).user(user).change(cd).test(type);
    } catch (OrmException err) {
        throw new JavaException(this, 1, err);
    } catch (PermissionBackendException err) {
        SystemException se = new SystemException(err.getMessage());
        se.initCause(err);
        throw se;
    }
    int min = 0;
    int max = 0;
    for (LabelPermission.WithValue v : can) {
        min = Math.min(min, v.value());
        max = Math.max(max, v.value());
    }
    if (!a3.unify(new IntegerTerm(min), engine.trail)) {
        return engine.fail();
    }
    if (!a4.unify(new IntegerTerm(max), engine.trail)) {
        return engine.fail();
    }
    return cont;
}

Example 4 with Term

use of com.googlecode.prolog_cafe.lang.Term in project gerrit by GerritCodeReview.

the class PRED_current_user_1 method exec.

@Override
public Operation exec(Prolog engine) throws PrologException {
    engine.setB0();
    Term a1 = arg1.dereference();
    CurrentUser curUser = StoredValues.CURRENT_USER.getOrNull(engine);
    if (curUser == null) {
        throw new EvaluationException("Current user not available in this rule type");
    }
    Term resultTerm;
    if (curUser.isIdentifiedUser()) {
        Account.Id id = curUser.getAccountId();
        resultTerm = new IntegerTerm(id.get());
    } else if (curUser instanceof AnonymousUser) {
        resultTerm = anonymous;
    } else if (curUser instanceof PeerDaemonUser) {
        resultTerm = peerDaemon;
    } else {
        throw new EvaluationException("Unknown user type");
    }
    if (!a1.unify(new StructureTerm(user, resultTerm), engine.trail)) {
        return engine.fail();
    }
    return cont;
}

Example 5 with Term

use of com.googlecode.prolog_cafe.lang.Term in project gerrit by GerritCodeReview.

the class RulesCache method prettyProlog.

private static String prettyProlog(Term at) {
    StringBuilder b = new StringBuilder();
    for (Object o : ((ListTerm) at).toJava()) {
        if (o instanceof Term) {
            Term t = (Term) o;
            if (!(t instanceof StructureTerm)) {
                b.append(t.toString()).append(' ');
                continue;
            }
            switch(t.name()) {
                case "atom":
                    SymbolTerm atom = (SymbolTerm) t.arg(0);
                    b.append(atom.toString());
                    break;
                case "var":
                    b.append(t.arg(0).toString());
                    break;
            }
        } else {
            b.append(o);
        }
    }
    return b.toString().trim();
}