Examples with ConjunctionChain org.batfish.datamodel.routing_policy.expr.ConjunctionChain used on opensource projects

Example 1 with ConjunctionChain

use of org.batfish.datamodel.routing_policy.expr.ConjunctionChain in project batfish by batfish.

the class RoutingPolicyTests method testRoutingPolicyDeepCircularReference.

/**
 * Policy with actual circular reference deep in the policy
 */
@Test
public void testRoutingPolicyDeepCircularReference() {
    String parentPolicyName = "parent";
    CallStatement callStatement = new CallStatement(parentPolicyName);
    BufferedStatement bs = new BufferedStatement(callStatement);
    WithEnvironmentExpr we1 = new WithEnvironmentExpr();
    we1.setPostStatements(ImmutableList.of(bs));
    If if1 = new If();
    if1.setGuard(we1);
    WithEnvironmentExpr we2 = new WithEnvironmentExpr();
    we2.setPostTrueStatements(ImmutableList.of(if1));
    If if2 = new If();
    if2.setGuard(we2);
    If if3 = new If();
    if3.setTrueStatements(ImmutableList.of(if2));
    If if4 = new If();
    if4.setFalseStatements(ImmutableList.of(if3));
    WithEnvironmentExpr we3 = new WithEnvironmentExpr();
    we3.setPreStatements(ImmutableList.of(if4));
    WithEnvironmentExpr we4 = new WithEnvironmentExpr();
    we4.setExpr(we3);
    Conjunction conj = new Conjunction();
    conj.setConjuncts(ImmutableList.of(we4));
    ConjunctionChain conjunctionChain = new ConjunctionChain(ImmutableList.of(conj));
    Disjunction disjunction = new Disjunction();
    disjunction.setDisjuncts(ImmutableList.of(conjunctionChain));
    DisjunctionChain disjunctionChain = new DisjunctionChain(ImmutableList.of(disjunction));
    Not not = new Not(disjunctionChain);
    If if5 = new If();
    if5.setGuard(not);
    _rpb.setName(parentPolicyName).setStatements(ImmutableList.of(if5)).build();
    _c.computeRoutingPolicySources(_w);
    /*
     * A circular reference warning should be emitted containing the name of the circularly
     * referenced policy.
     */
    assertThat(_w.getRedFlagWarnings(), not(empty()));
    assertThat(_w.getRedFlagWarnings().iterator().next().getText(), containsString(parentPolicyName));
}

Example 2 with ConjunctionChain

use of org.batfish.datamodel.routing_policy.expr.ConjunctionChain in project batfish by batfish.

the class TransferBDD method compute.

/*
   * Convert a Batfish AST boolean expression to a symbolic Z3 boolean expression
   * by performing inlining of stateful side effects.
   */
private TransferResult<TransferReturn, BDD> compute(BooleanExpr expr, TransferParam<BDDRoute> p) {
    // TODO: right now everything is IPV4
    if (expr instanceof MatchIpv4) {
        p.debug("MatchIpv4");
        TransferReturn ret = new TransferReturn(p.getData(), factory.one());
        p.debug("MatchIpv4 Result: " + ret);
        return fromExpr(ret);
    }
    if (expr instanceof MatchIpv6) {
        p.debug("MatchIpv6");
        TransferReturn ret = new TransferReturn(p.getData(), factory.zero());
        return fromExpr(ret);
    }
    if (expr instanceof Conjunction) {
        p.debug("Conjunction");
        Conjunction c = (Conjunction) expr;
        BDD acc = factory.one();
        TransferResult<TransferReturn, BDD> result = new TransferResult<>();
        for (BooleanExpr be : c.getConjuncts()) {
            TransferResult<TransferReturn, BDD> r = compute(be, p.indent());
            acc = acc.and(r.getReturnValue().getSecond());
        }
        TransferReturn ret = new TransferReturn(p.getData(), acc);
        p.debug("Conjunction return: " + acc);
        return result.setReturnValue(ret);
    }
    if (expr instanceof Disjunction) {
        p.debug("Disjunction");
        Disjunction d = (Disjunction) expr;
        BDD acc = factory.zero();
        TransferResult<TransferReturn, BDD> result = new TransferResult<>();
        for (BooleanExpr be : d.getDisjuncts()) {
            TransferResult<TransferReturn, BDD> r = compute(be, p.indent());
            result = result.addChangedVariables(r);
            acc = acc.or(r.getReturnValue().getSecond());
        }
        TransferReturn ret = new TransferReturn(p.getData(), acc);
        p.debug("Disjunction return: " + acc);
        return result.setReturnValue(ret);
    }
    // TODO: thread the BDDRecord through calls
    if (expr instanceof ConjunctionChain) {
        p.debug("ConjunctionChain");
        ConjunctionChain d = (ConjunctionChain) expr;
        List<BooleanExpr> conjuncts = new ArrayList<>(d.getSubroutines());
        if (p.getDefaultPolicy() != null) {
            BooleanExpr be = new CallExpr(p.getDefaultPolicy().getDefaultPolicy());
            conjuncts.add(be);
        }
        if (conjuncts.size() == 0) {
            TransferReturn ret = new TransferReturn(p.getData(), factory.one());
            return fromExpr(ret);
        } else {
            TransferResult<TransferReturn, BDD> result = new TransferResult<>();
            TransferParam<BDDRoute> record = p;
            BDD acc = factory.zero();
            for (int i = conjuncts.size() - 1; i >= 0; i--) {
                BooleanExpr conjunct = conjuncts.get(i);
                TransferParam<BDDRoute> param = record.setDefaultPolicy(null).setChainContext(TransferParam.ChainContext.CONJUNCTION).indent();
                TransferResult<TransferReturn, BDD> r = compute(conjunct, param);
                record = record.setData(r.getReturnValue().getFirst());
                acc = ite(r.getFallthroughValue(), acc, r.getReturnValue().getSecond());
            }
            TransferReturn ret = new TransferReturn(record.getData(), acc);
            return result.setReturnValue(ret);
        }
    }
    if (expr instanceof DisjunctionChain) {
        p.debug("DisjunctionChain");
        DisjunctionChain d = (DisjunctionChain) expr;
        List<BooleanExpr> disjuncts = new ArrayList<>(d.getSubroutines());
        if (p.getDefaultPolicy() != null) {
            BooleanExpr be = new CallExpr(p.getDefaultPolicy().getDefaultPolicy());
            disjuncts.add(be);
        }
        if (disjuncts.size() == 0) {
            TransferReturn ret = new TransferReturn(p.getData(), factory.zero());
            return fromExpr(ret);
        } else {
            TransferResult<TransferReturn, BDD> result = new TransferResult<>();
            TransferParam<BDDRoute> record = p;
            BDD acc = factory.zero();
            for (int i = disjuncts.size() - 1; i >= 0; i--) {
                BooleanExpr disjunct = disjuncts.get(i);
                TransferParam<BDDRoute> param = record.setDefaultPolicy(null).setChainContext(TransferParam.ChainContext.CONJUNCTION).indent();
                TransferResult<TransferReturn, BDD> r = compute(disjunct, param);
                record = record.setData(r.getReturnValue().getFirst());
                acc = ite(r.getFallthroughValue(), acc, r.getReturnValue().getSecond());
            }
            TransferReturn ret = new TransferReturn(record.getData(), acc);
            return result.setReturnValue(ret);
        }
    }
    if (expr instanceof Not) {
        p.debug("mkNot");
        Not n = (Not) expr;
        TransferResult<TransferReturn, BDD> result = compute(n.getExpr(), p);
        TransferReturn r = result.getReturnValue();
        TransferReturn ret = new TransferReturn(r.getFirst(), r.getSecond().not());
        return result.setReturnValue(ret);
    }
    if (expr instanceof MatchProtocol) {
        MatchProtocol mp = (MatchProtocol) expr;
        Protocol proto = Protocol.fromRoutingProtocol(mp.getProtocol());
        if (proto == null) {
            p.debug("MatchProtocol(" + mp.getProtocol().protocolName() + "): false");
            TransferReturn ret = new TransferReturn(p.getData(), factory.zero());
            return fromExpr(ret);
        }
        BDD protoMatch = p.getData().getProtocolHistory().value(proto);
        p.debug("MatchProtocol(" + mp.getProtocol().protocolName() + "): " + protoMatch);
        TransferReturn ret = new TransferReturn(p.getData(), protoMatch);
        return fromExpr(ret);
    }
    if (expr instanceof MatchPrefixSet) {
        p.debug("MatchPrefixSet");
        MatchPrefixSet m = (MatchPrefixSet) expr;
        BDD r = matchPrefixSet(p.indent(), _conf, m.getPrefixSet(), p.getData());
        TransferReturn ret = new TransferReturn(p.getData(), r);
        return fromExpr(ret);
    // TODO: implement me
    } else if (expr instanceof MatchPrefix6Set) {
        p.debug("MatchPrefix6Set");
        TransferReturn ret = new TransferReturn(p.getData(), factory.zero());
        return fromExpr(ret);
    } else if (expr instanceof CallExpr) {
        p.debug("CallExpr");
        CallExpr c = (CallExpr) expr;
        String router = _conf.getName();
        String name = c.getCalledPolicyName();
        TransferResult<TransferReturn, BDD> r = CACHE.get(router, name);
        if (r != null) {
            return r;
        }
        RoutingPolicy pol = _conf.getRoutingPolicies().get(name);
        p = p.setCallContext(TransferParam.CallContext.EXPR_CALL);
        r = compute(pol.getStatements(), p.indent().enterScope(name));
        CACHE.put(router, name, r);
        return r;
    } else if (expr instanceof WithEnvironmentExpr) {
        p.debug("WithEnvironmentExpr");
        // TODO: this is not correct
        WithEnvironmentExpr we = (WithEnvironmentExpr) expr;
        // TODO: postStatements() and preStatements()
        return compute(we.getExpr(), p.deepCopy());
    } else if (expr instanceof MatchCommunitySet) {
        p.debug("MatchCommunitySet");
        MatchCommunitySet mcs = (MatchCommunitySet) expr;
        BDD c = matchCommunitySet(p.indent(), _conf, mcs.getExpr(), p.getData());
        TransferReturn ret = new TransferReturn(p.getData(), c);
        return fromExpr(ret);
    } else if (expr instanceof BooleanExprs.StaticBooleanExpr) {
        BooleanExprs.StaticBooleanExpr b = (BooleanExprs.StaticBooleanExpr) expr;
        TransferReturn ret;
        switch(b.getType()) {
            case CallExprContext:
                p.debug("CallExprContext");
                BDD x1 = mkBDD(p.getCallContext() == TransferParam.CallContext.EXPR_CALL);
                ret = new TransferReturn(p.getData(), x1);
                return fromExpr(ret);
            case CallStatementContext:
                p.debug("CallStmtContext");
                BDD x2 = mkBDD(p.getCallContext() == TransferParam.CallContext.STMT_CALL);
                ret = new TransferReturn(p.getData(), x2);
                return fromExpr(ret);
            case True:
                p.debug("True");
                ret = new TransferReturn(p.getData(), factory.one());
                return fromExpr(ret);
            case False:
                p.debug("False");
                ret = new TransferReturn(p.getData(), factory.zero());
                return fromExpr(ret);
            default:
                throw new BatfishException("Unhandled " + BooleanExprs.class.getCanonicalName() + ": " + b.getType());
        }
    } else if (expr instanceof MatchAsPath) {
        p.debug("MatchAsPath");
        // System.out.println("Warning: use of unimplemented feature MatchAsPath");
        TransferReturn ret = new TransferReturn(p.getData(), factory.one());
        return fromExpr(ret);
    }
    throw new BatfishException("TODO: compute expr transfer function: " + expr);
}

Example 3 with ConjunctionChain

use of org.batfish.datamodel.routing_policy.expr.ConjunctionChain in project batfish by batfish.

the class TransferSSA method compute.

/*
   * Convert a Batfish AST boolean expression to a symbolic Z3 boolean expression
   * by performing inlining of stateful side effects.
   */
private TransferResult<BoolExpr, BoolExpr> compute(BooleanExpr expr, TransferParam<SymbolicRoute> p) {
    // TODO: right now everything is IPV4
    if (expr instanceof MatchIpv4) {
        p.debug("MatchIpv4");
        return fromExpr(_enc.mkTrue());
    }
    if (expr instanceof MatchIpv6) {
        p.debug("MatchIpv6");
        return fromExpr(_enc.mkFalse());
    }
    if (expr instanceof Conjunction) {
        p.debug("Conjunction");
        Conjunction c = (Conjunction) expr;
        BoolExpr acc = _enc.mkTrue();
        TransferResult<BoolExpr, BoolExpr> result = new TransferResult<>();
        for (BooleanExpr be : c.getConjuncts()) {
            TransferResult<BoolExpr, BoolExpr> r = compute(be, p.indent());
            result = result.addChangedVariables(r);
            acc = _enc.mkAnd(acc, r.getReturnValue());
        }
        p.debug("has changed variable");
        return result.setReturnValue(acc);
    }
    if (expr instanceof Disjunction) {
        p.debug("Disjunction");
        Disjunction d = (Disjunction) expr;
        BoolExpr acc = _enc.mkFalse();
        TransferResult<BoolExpr, BoolExpr> result = new TransferResult<>();
        for (BooleanExpr be : d.getDisjuncts()) {
            TransferResult<BoolExpr, BoolExpr> r = compute(be, p.indent());
            result = result.addChangedVariables(r);
            acc = _enc.mkOr(acc, r.getReturnValue());
        }
        p.debug("has changed variable");
        return result.setReturnValue(acc);
    }
    if (expr instanceof ConjunctionChain) {
        p.debug("ConjunctionChain");
        ConjunctionChain d = (ConjunctionChain) expr;
        List<BooleanExpr> conjuncts = new ArrayList<>(d.getSubroutines());
        if (p.getDefaultPolicy() != null) {
            BooleanExpr be = new CallExpr(p.getDefaultPolicy().getDefaultPolicy());
            conjuncts.add(be);
        }
        if (conjuncts.size() == 0) {
            return fromExpr(_enc.mkTrue());
        } else {
            TransferResult<BoolExpr, BoolExpr> result = new TransferResult<>();
            BoolExpr acc = _enc.mkFalse();
            for (int i = conjuncts.size() - 1; i >= 0; i--) {
                BooleanExpr conjunct = conjuncts.get(i);
                TransferParam<SymbolicRoute> param = p.setDefaultPolicy(null).setChainContext(TransferParam.ChainContext.CONJUNCTION);
                TransferResult<BoolExpr, BoolExpr> r = compute(conjunct, param);
                result = result.addChangedVariables(r);
                acc = _enc.mkIf(r.getFallthroughValue(), acc, r.getReturnValue());
            }
            p.debug("ConjunctionChain Result: " + acc);
            return result.setReturnValue(acc);
        }
    }
    if (expr instanceof DisjunctionChain) {
        p.debug("DisjunctionChain");
        DisjunctionChain d = (DisjunctionChain) expr;
        List<BooleanExpr> disjuncts = new ArrayList<>(d.getSubroutines());
        if (p.getDefaultPolicy() != null) {
            BooleanExpr be = new CallExpr(p.getDefaultPolicy().getDefaultPolicy());
            disjuncts.add(be);
        }
        if (disjuncts.size() == 0) {
            return fromExpr(_enc.mkTrue());
        } else {
            TransferResult<BoolExpr, BoolExpr> result = new TransferResult<>();
            BoolExpr acc = _enc.mkFalse();
            for (int i = disjuncts.size() - 1; i >= 0; i--) {
                BooleanExpr disjunct = disjuncts.get(i);
                TransferParam<SymbolicRoute> param = p.setDefaultPolicy(null).setChainContext(TransferParam.ChainContext.CONJUNCTION);
                TransferResult<BoolExpr, BoolExpr> r = compute(disjunct, param);
                result.addChangedVariables(r);
                acc = _enc.mkIf(r.getFallthroughValue(), acc, r.getReturnValue());
            }
            p.debug("DisjunctionChain Result: " + acc);
            return result.setReturnValue(acc);
        }
    }
    if (expr instanceof Not) {
        p.debug("mkNot");
        Not n = (Not) expr;
        TransferResult<BoolExpr, BoolExpr> result = compute(n.getExpr(), p);
        return result.setReturnValue(_enc.mkNot(result.getReturnValue()));
    }
    if (expr instanceof MatchProtocol) {
        MatchProtocol mp = (MatchProtocol) expr;
        Protocol proto = Protocol.fromRoutingProtocol(mp.getProtocol());
        if (proto == null) {
            p.debug("MatchProtocol(" + mp.getProtocol().protocolName() + "): false");
            return fromExpr(_enc.mkFalse());
        }
        if (_other.getProtocolHistory() == null) {
            BoolExpr protoMatch = _enc.mkBool(proto.equals(_proto));
            p.debug("MatchProtocol(" + mp.getProtocol().protocolName() + "): " + protoMatch);
            return fromExpr(protoMatch);
        }
        BoolExpr protoMatch = _other.getProtocolHistory().checkIfValue(proto);
        p.debug("MatchProtocol(" + mp.getProtocol().protocolName() + "): " + protoMatch);
        return fromExpr(protoMatch);
    }
    if (expr instanceof MatchPrefixSet) {
        p.debug("MatchPrefixSet");
        MatchPrefixSet m = (MatchPrefixSet) expr;
        // For BGP, may change prefix length
        TransferResult<BoolExpr, BoolExpr> result = matchPrefixSet(_conf, m.getPrefixSet(), p.getData());
        return result.setReturnAssignedValue(_enc.mkTrue());
    // TODO: implement me
    } else if (expr instanceof MatchPrefix6Set) {
        p.debug("MatchPrefix6Set");
        return fromExpr(_enc.mkFalse());
    } else if (expr instanceof CallExpr) {
        p.debug("CallExpr");
        // TODO: the call can modify certain fields, need to keep track of these variables
        CallExpr c = (CallExpr) expr;
        String name = c.getCalledPolicyName();
        RoutingPolicy pol = _conf.getRoutingPolicies().get(name);
        p = p.setCallContext(TransferParam.CallContext.EXPR_CALL);
        TransferResult<BoolExpr, BoolExpr> r = compute(pol.getStatements(), p.indent().enterScope(name), initialResult());
        p.debug("CallExpr (return): " + r.getReturnValue());
        p.debug("CallExpr (fallthrough): " + r.getFallthroughValue());
        return r;
    } else if (expr instanceof WithEnvironmentExpr) {
        p.debug("WithEnvironmentExpr");
        // TODO: this is not correct
        WithEnvironmentExpr we = (WithEnvironmentExpr) expr;
        // TODO: postStatements() and preStatements()
        return compute(we.getExpr(), p);
    } else if (expr instanceof MatchCommunitySet) {
        p.debug("MatchCommunitySet");
        MatchCommunitySet mcs = (MatchCommunitySet) expr;
        return fromExpr(matchCommunitySet(_conf, mcs.getExpr(), p.getData()));
    } else if (expr instanceof BooleanExprs.StaticBooleanExpr) {
        BooleanExprs.StaticBooleanExpr b = (BooleanExprs.StaticBooleanExpr) expr;
        switch(b.getType()) {
            case CallExprContext:
                p.debug("CallExprContext");
                return fromExpr(_enc.mkBool(p.getCallContext() == TransferParam.CallContext.EXPR_CALL));
            case CallStatementContext:
                p.debug("CallStmtContext");
                return fromExpr(_enc.mkBool(p.getCallContext() == TransferParam.CallContext.STMT_CALL));
            case True:
                p.debug("True");
                return fromExpr(_enc.mkTrue());
            case False:
                p.debug("False");
                return fromExpr(_enc.mkFalse());
            default:
                throw new BatfishException("Unhandled " + BooleanExprs.class.getCanonicalName() + ": " + b.getType());
        }
    } else if (expr instanceof MatchAsPath) {
        p.debug("MatchAsPath");
        System.out.println("Warning: use of unimplemented feature MatchAsPath");
        return fromExpr(_enc.mkFalse());
    }
    String s = (_isExport ? "export" : "import");
    String msg = String.format("Unimplemented feature %s for %s transfer function on interface %s", expr.toString(), s, _graphEdge.toString());
    throw new BatfishException(msg);
}

Example 4 with ConjunctionChain

use of org.batfish.datamodel.routing_policy.expr.ConjunctionChain in project batfish by batfish.

the class AstVisitor method visit.

/*
   * Walk starting from an AST boolean expression
   */
public void visit(Configuration conf, BooleanExpr e, Consumer<Statement> fs, Consumer<BooleanExpr> fe) {
    fe.accept(e);
    if (e instanceof Conjunction) {
        Conjunction c = (Conjunction) e;
        for (BooleanExpr be : c.getConjuncts()) {
            visit(conf, be, fs, fe);
        }
    } else if (e instanceof Disjunction) {
        Disjunction d = (Disjunction) e;
        for (BooleanExpr be : d.getDisjuncts()) {
            visit(conf, be, fs, fe);
        }
    } else if (e instanceof ConjunctionChain) {
        ConjunctionChain c = (ConjunctionChain) e;
        for (BooleanExpr be : c.getSubroutines()) {
            visit(conf, be, fs, fe);
        }
    } else if (e instanceof DisjunctionChain) {
        DisjunctionChain d = (DisjunctionChain) e;
        for (BooleanExpr be : d.getSubroutines()) {
            visit(conf, be, fs, fe);
        }
    } else if (e instanceof Not) {
        Not n = (Not) e;
        visit(conf, n.getExpr(), fs, fe);
    } else if (e instanceof CallExpr) {
        CallExpr c = (CallExpr) e;
        RoutingPolicy rp = conf.getRoutingPolicies().get(c.getCalledPolicyName());
        visit(conf, rp.getStatements(), fs, fe);
    }
}

Example 5 with ConjunctionChain

use of org.batfish.datamodel.routing_policy.expr.ConjunctionChain in project batfish by batfish.

the class JuniperConfiguration method toRoutingPolicy.

private RoutingPolicy toRoutingPolicy(PolicyStatement ps) {
    String name = ps.getName();
    RoutingPolicy routingPolicy = new RoutingPolicy(name, _c);
    List<Statement> statements = routingPolicy.getStatements();
    boolean hasDefaultTerm = ps.getDefaultTerm().getFroms().size() > 0 || ps.getDefaultTerm().getThens().size() > 0;
    List<PsTerm> terms = new ArrayList<>();
    terms.addAll(ps.getTerms().values());
    if (hasDefaultTerm) {
        terms.add(ps.getDefaultTerm());
    }
    for (PsTerm term : terms) {
        List<Statement> thens = toStatements(term.getThens());
        if (!term.getFroms().isEmpty()) {
            If ifStatement = new If();
            ifStatement.setComment(term.getName());
            Conjunction conj = new Conjunction();
            List<BooleanExpr> subroutines = new ArrayList<>();
            for (PsFrom from : term.getFroms()) {
                if (from instanceof PsFromRouteFilter) {
                    int actionLineCounter = 0;
                    PsFromRouteFilter fromRouteFilter = (PsFromRouteFilter) from;
                    String routeFilterName = fromRouteFilter.getRouteFilterName();
                    RouteFilter rf = _routeFilters.get(routeFilterName);
                    for (RouteFilterLine line : rf.getLines()) {
                        if (line.getThens().size() > 0) {
                            String lineListName = name + "_ACTION_LINE_" + actionLineCounter;
                            RouteFilterList lineSpecificList = new RouteFilterList(lineListName);
                            line.applyTo(lineSpecificList);
                            actionLineCounter++;
                            _c.getRouteFilterLists().put(lineListName, lineSpecificList);
                            If lineSpecificIfStatement = new If();
                            String lineSpecificClauseName = routeFilterName + "_ACTION_LINE_" + actionLineCounter;
                            lineSpecificIfStatement.setComment(lineSpecificClauseName);
                            MatchPrefixSet mrf = new MatchPrefixSet(new DestinationNetwork(), new NamedPrefixSet(lineListName));
                            lineSpecificIfStatement.setGuard(mrf);
                            lineSpecificIfStatement.getTrueStatements().addAll(toStatements(line.getThens()));
                            statements.add(lineSpecificIfStatement);
                        }
                    }
                }
                BooleanExpr booleanExpr = from.toBooleanExpr(this, _c, _w);
                if (from instanceof PsFromPolicyStatement || from instanceof PsFromPolicyStatementConjunction) {
                    subroutines.add(booleanExpr);
                } else {
                    conj.getConjuncts().add(booleanExpr);
                }
            }
            if (!subroutines.isEmpty()) {
                ConjunctionChain chain = new ConjunctionChain(subroutines);
                conj.getConjuncts().add(chain);
            }
            BooleanExpr guard = conj.simplify();
            ifStatement.setGuard(guard);
            ifStatement.getTrueStatements().addAll(thens);
            statements.add(ifStatement);
        } else {
            statements.addAll(thens);
        }
    }
    If endOfPolicy = new If();
    endOfPolicy.setGuard(BooleanExprs.CallExprContext.toStaticBooleanExpr());
    endOfPolicy.setFalseStatements(Collections.singletonList(Statements.Return.toStaticStatement()));
    statements.add(endOfPolicy);
    return routingPolicy;
}