How to use

visit

method

in

org.apache.calcite.linq4j.tree.VisitorImpl

 @Override public Void visit(ConstantExpression constantExpression) {
  if (constantExpression.value instanceof Type) {
   types.add((Type) constantExpression.value);
  }
  return super.visit(constantExpression);
 }
}

 @Override public Void visit(ConstantExpression constantExpression) {
  if (constantExpression.value instanceof Type) {
   types.add((Type) constantExpression.value);
  }
  return super.visit(constantExpression);
 }
}

@Override public Void visit(ParameterExpression parameter) {
 final Slot slot = map.get(parameter);
 if (slot != null) {
  // Count use of parameter, if it's registered. It's OK if
  // parameter is not registered. It might be beyond the control
  // of this block.
  slot.count++;
 }
 return super.visit(parameter);
}

@Override public Void visit(NewExpression newExpression) {
 types.add(newExpression.type);
 return super.visit(newExpression);
}

@Override public Void visit(NewExpression newExpression) {
 types.add(newExpression.type);
 return super.visit(newExpression);
}

@Override public Void visit(NewArrayExpression newArrayExpression) {
 Type type = newArrayExpression.type;
 for (;;) {
  final Type componentType = Types.getComponentType(type);
  if (componentType == null) {
   break;
  }
  type = componentType;
 }
 types.add(type);
 return super.visit(newArrayExpression);
}

@Override public Void visit(NewArrayExpression newArrayExpression) {
 Type type = newArrayExpression.type;
 for (;;) {
  final Type componentType = Types.getComponentType(type);
  if (componentType == null) {
   break;
  }
  type = componentType;
 }
 types.add(type);
 return super.visit(newArrayExpression);
}