Examples with Expr com.google.api.expr.v1alpha1.Expr used on opensource projects

Example 46 with Expr

use of com.google.api.expr.v1alpha1.Expr in project bmoth by hhu-stups.

the class BooleanFormulaEvaluationTest method testFalseFormula.

@Test
public void testFalseFormula() throws Exception {
    String formula = "x = FALSE";
    // getting the translated z3 representation of the formula
    BoolExpr constraint = FormulaToZ3Translator.translatePredicate(formula, z3Context);
    z3Solver.add(constraint);
    Status check = z3Solver.check();
    Expr x = z3Context.mkBoolConst("x");
    assertEquals(SATISFIABLE, check);
    assertEquals(z3Context.mkFalse(), z3Solver.getModel().eval(x, true));
}

Example 47 with Expr

use of com.google.api.expr.v1alpha1.Expr in project bmoth by hhu-stups.

the class BooleanFormulaEvaluationTest method testImplication.

@Test
public void testImplication() throws Exception {
    String formula = "1=1 => x";
    // getting the translated z3 representation of the formula
    BoolExpr constraint = FormulaToZ3Translator.translatePredicate(formula, z3Context);
    z3Solver.add(constraint);
    Status check = z3Solver.check();
    Expr x = z3Context.mkBoolConst("x");
    assertEquals(SATISFIABLE, check);
    assertEquals(z3Context.mkBool(true), z3Solver.getModel().eval(x, true));
}

Example 48 with Expr

use of com.google.api.expr.v1alpha1.Expr in project bmoth by hhu-stups.

the class SetFormulaEvaluationTest method testSetExtensionFormulaWithSetVarModel.

@Test
public void testSetExtensionFormulaWithSetVarModel() {
    String formula = "{1,2} = x";
    // getting the translated z3 representation of the formula
    BoolExpr constraint = FormulaToZ3Translator.translatePredicate(formula, z3Context);
    z3Solver.add(constraint);
    Status check = z3Solver.check();
    Expr x = z3Context.mkArrayConst("x", z3Context.mkIntSort(), z3Context.mkBoolSort());
    assertEquals(Status.SATISFIABLE, check);
    assertEquals("(store (store ((as const (Array Int Bool)) false) 1 true) 2 true)", z3Solver.getModel().eval(x, true).toString());
}

Example 49 with Expr

use of com.google.api.expr.v1alpha1.Expr in project bmoth by hhu-stups.

the class SetFormulaEvaluationTest method testSetExtensionFormulaWithSingleVarModel.

@Test
public void testSetExtensionFormulaWithSingleVarModel() {
    String formula = "{1,2} = {2,x}";
    // getting the translated z3 representation of the formula
    BoolExpr constraint = FormulaToZ3Translator.translatePredicate(formula, z3Context);
    z3Solver.add(constraint);
    Status check = z3Solver.check();
    Expr x = z3Context.mkIntConst("x");
    assertEquals(Status.SATISFIABLE, check);
    assertEquals(z3Context.mkInt(1), z3Solver.getModel().eval(x, true));
}

Example 50 with Expr

use of com.google.api.expr.v1alpha1.Expr in project batfish by batfish.

the class Encoder method environmentBlockingClause.

/*
   * Generate a blocking clause for the encoding that says that one
   * of the environments that was true before must now be false.
   */
private BoolExpr environmentBlockingClause(Model m) {
    BoolExpr acc1 = mkFalse();
    BoolExpr acc2 = mkTrue();
    // Disable an environment edge if possible
    Map<LogicalEdge, SymbolicRoute> map = getMainSlice().getLogicalGraph().getEnvironmentVars();
    for (Map.Entry<LogicalEdge, SymbolicRoute> entry : map.entrySet()) {
        SymbolicRoute record = entry.getValue();
        BoolExpr per = record.getPermitted();
        Expr x = m.evaluate(per, false);
        if (x.toString().equals("true")) {
            acc1 = mkOr(acc1, mkNot(per));
        } else {
            acc2 = mkAnd(acc2, mkNot(per));
        }
    }
    // Disable a community value if possible
    for (Map.Entry<LogicalEdge, SymbolicRoute> entry : map.entrySet()) {
        SymbolicRoute record = entry.getValue();
        for (Map.Entry<CommunityVar, BoolExpr> centry : record.getCommunities().entrySet()) {
            BoolExpr comm = centry.getValue();
            Expr x = m.evaluate(comm, false);
            if (x.toString().equals("true")) {
                acc1 = mkOr(acc1, mkNot(comm));
            } else {
                acc2 = mkAnd(acc2, mkNot(comm));
            }
        }
    }
    return mkAnd(acc1, acc2);
}