util

type BitSet interface {
	// Clear used for set the bit specified by the index to false.
	Clear(index int)
	// Set used for set the bit at the specified index to true.
	Set(index int)
	// Get returns the value of the bit with the specified index.
	// The value is true if the bit with the index is currently set in this BitSet;
	// otherwise, the result is false.
	Get(index int) bool
	// IsEmpty returns true if this BitSet contains no bits that are set to true.
	IsEmpty() bool
	// Reset clean all bit.
	Reset()
}

type Set interface {
	// Add the specified element to this set if it is not already present.
	Add(element interface{})
	// Remove the specified element from this set if it is present.
	Remove(element interface{})
	// Contains returns true if this set contains the specified element.
	Contains(element interface{}) bool
	// IsEmpty returns true if this set contains no elements.
	IsEmpty() bool
	// Size returns the number of elements in this set.
	Size() int
	// Range calls f sequentially for each key and value present in the set.
	// If f returns false, range stops the iteration.
	Range(f func(element interface{}) bool)
	// Clear removes all of the elements from this set.
	Clear()
	// Intersection returns a Set with intersection elements between this Set and specified Set.
	Intersection(set Set) Set
	// Union returns a Set with union elements between this Set and specified Set.
	Union(set Set) Set
}

type URL struct {
	Protocol string
	User     string
	Password string
	Host     string
	Port     int
	Path     string
	Param    map[string]string
}