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

Example 6 with JavaObjectTerm

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

the class PRED_current_user_2 method createUser.

public Term createUser(Prolog engine, Term key) {
    if (!(key instanceof StructureTerm) || key.arity() != 1 || !((StructureTerm) key).functor().equals(user)) {
        throw new IllegalTypeException(this, 1, "user(int)", key);
    }
    Term idTerm = key.arg(0);
    CurrentUser user;
    if (idTerm instanceof IntegerTerm) {
        Map<Account.Id, IdentifiedUser> cache = StoredValues.USERS.get(engine);
        Account.Id accountId = new Account.Id(((IntegerTerm) idTerm).intValue());
        user = cache.get(accountId);
        if (user == null) {
            IdentifiedUser.GenericFactory userFactory = userFactory(engine);
            IdentifiedUser who = userFactory.create(accountId);
            cache.put(accountId, who);
            user = who;
        }
    } else if (idTerm.equals(anonymous)) {
        user = StoredValues.ANONYMOUS_USER.get(engine);
    } else {
        throw new IllegalTypeException(this, 1, "user(int)", key);
    }
    return new JavaObjectTerm(user);
}

Example 7 with JavaObjectTerm

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

the class RulesCache method consultRules.

private PrologMachineCopy consultRules(String name, Reader rules) throws CompileException {
    BufferingPrologControl ctl = newEmptyMachine(systemLoader);
    PushbackReader in = new PushbackReader(rules, Prolog.PUSHBACK_SIZE);
    try {
        if (!ctl.execute(Prolog.BUILTIN, "consult_stream", SymbolTerm.intern(name), new JavaObjectTerm(in))) {
            return null;
        }
    } catch (SyntaxException e) {
        throw new CompileException(e.toString(), e);
    } catch (TermException e) {
        Term m = e.getMessageTerm();
        if (m instanceof StructureTerm && "syntax_error".equals(m.name()) && m.arity() >= 1) {
            StringBuilder msg = new StringBuilder();
            if (m.arg(0) instanceof ListTerm) {
                msg.append(Joiner.on(' ').join(((ListTerm) m.arg(0)).toJava()));
            } else {
                msg.append(m.arg(0).toString());
            }
            if (m.arity() == 2 && m.arg(1) instanceof StructureTerm && "at".equals(m.arg(1).name())) {
                Term at = m.arg(1).arg(0).dereference();
                if (at instanceof ListTerm) {
                    msg.append(" at: ");
                    msg.append(prettyProlog(at));
                }
            }
            throw new CompileException(msg.toString(), e);
        }
        throw new CompileException("Error while consulting rules from " + name, e);
    } catch (RuntimeException e) {
        throw new CompileException("Error while consulting rules from " + name, e);
    }
    return save(ctl);
}