public RelationAtom(Operand left, Comparator cmp, Operand right) {
o1 = left;
o2 = right;
isSatisfiable = true;
this.cmp = cmp;
if (o1.isVariableNotExist() || o2.isVariableNotExist()) isSatisfiable = false;
else if (!isSymbolic()) isSatisfiable = isSatisfyConcreteConstraint();
text = o1.getText() + cmp.toString() + o2.getText();
}
private boolean isSatisfyConcreteConstraint() {
Object left = o1.getConcreteValue();
Object right = o2.getConcreteValue();
if (left instanceof String && right instanceof String) {
String a = (String) left;
String b = (String) right;
switch (cmp) {
case EQ:
return a.equals(b);
case NE:
return !a.equals(b);
default:
throw new RuntimeException(
"## Error: The operator "
+ cmp
+ " is undefined for the argument type(s) java.lang.String, java.lang.String");
}
} else if (left instanceof Number && right instanceof Number) {
double a = ((Number) left).doubleValue();
double b = ((Number) right).doubleValue();
switch (cmp) {
case EQ:
return a == b;
case NE:
return a != b;
case LT:
return a < b;
case LE:
return a <= b;
case GT:
return a > b;
case GE:
return a >= b;
}
}
throw new RuntimeException("## Error: The reference type has not supported or incompatible");
}
@Override
public Constraint getConstraint() {
if (!isSatisfiable || !isSymbolic()) return null;
Expression left = o1.getSymbolicValue();
Expression right = o2.getSymbolicValue();
assert left != null && right != null;
if (left instanceof RealExpression && right instanceof RealExpression)
constraint = new RealConstraint((RealExpression) left, cmp, (RealExpression) right);
else if (left instanceof IntegerExpression && right instanceof IntegerExpression) {
if (left instanceof LinearIntegerExpression && right instanceof LinearIntegerExpression)
constraint =
new LinearIntegerConstraint((IntegerExpression) left, cmp, (IntegerExpression) right);
else
constraint =
new NonLinearIntegerConstraint(
(IntegerExpression) left, cmp, (IntegerExpression) right);
} else if (left instanceof RealExpression)
constraint = new MixedConstraint((RealExpression) left, cmp, (IntegerExpression) right);
else constraint = new MixedConstraint((RealExpression) right, cmp, (IntegerExpression) left);
return constraint;
}
public boolean isSymbolic() {
return o1.isSymbolic() || o2.isSymbolic();
}