How to use

isSystem

method

in

jscl.math.function.IConstant

  @Override
  public boolean isInCategory(@Nonnull IConstant var) {
    return var.isSystem();
  }
},

  @Override
  public boolean isInCategory(@Nonnull IConstant var) {
    return !var.isSystem();
  }
};

@Override
public String getDescription(@Nonnull String mathEntityName) {
  final IConstant var = get(mathEntityName);
  if (var != null && !var.isSystem()) {
    return var.getDescription();
  } else {
    return super.getDescription(mathEntityName);
  }
}

public void copy(@Nonnull MathEntity o) {
  if (o instanceof IConstant) {
    final IConstant that = ((IConstant) o);
    this.name = that.getName();
    this.value = that.getValue();
    this.description = that.getDescription();
    this.system = that.isSystem();
    if (that.isIdDefined()) {
      this.id = that.getId();
    }
  } else {
    throw new IllegalArgumentException("Trying to make a copy of unsupported type: " + o.getClass());
  }
}

@Nonnull
public static Set<Constant> getNotSystemConstants(@Nonnull Generic expression) {
  final Set<Constant> notSystemConstants = new HashSet<Constant>();
  for (Constant constant : expression.getConstants()) {
    IConstant var = Locator.getInstance().getEngine().getVarsRegistry().get(constant.getName());
    if (var != null && !var.isSystem() && !var.isDefined()) {
      notSystemConstants.add(constant);
    }
  }
  return notSystemConstants;
}

public Builder(@Nonnull IConstant iConstant) {
  this.name = iConstant.getName();
  this.value = iConstant.getValue();
  this.system = iConstant.isSystem();
  this.description = iConstant.getDescription();
  if (iConstant.isIdDefined()) {
    this.id = iConstant.getId();
  }
}