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|
// Tideland Go Library - Collections - Sets
//
// Copyright (C) 2015 Frank Mueller / Tideland / Oldenburg / Germany
//
// All rights reserved. Use of this source code is governed
// by the new BSD license.
package collections
//--------------------
// IMPORTS
//--------------------
import (
"fmt"
"github.com/tideland/golib/errors"
)
//--------------------
// SET
//--------------------
// set implements the Set interface.
type set struct {
values map[interface{}]struct{}
}
// NewSet creates a set with the passed values
// as initial content.
func NewSet(vs ...interface{}) Set {
s := &set{make(map[interface{}]struct{})}
s.Add(vs...)
return s
}
// Add implements the Set interface.
func (s *set) Add(vs ...interface{}) {
for _, v := range vs {
s.values[v] = struct{}{}
}
}
// Remove implements the Set interface.
func (s *set) Remove(vs ...interface{}) {
for _, v := range vs {
delete(s.values, v)
}
}
// Contains implements the Set interface.
func (s *set) Contains(v interface{}) bool {
_, ok := s.values[v]
return ok
}
// All implements the Set interface.
func (s *set) All() []interface{} {
all := []interface{}{}
for v := range s.values {
all = append(all, v)
}
return all
}
// FindAll implements the Set interface.
func (s *set) FindAll(f func(v interface{}) (bool, error)) ([]interface{}, error) {
found := []interface{}{}
for v := range s.values {
ok, err := f(v)
if err != nil {
return nil, errors.Annotate(err, ErrFindAll, errorMessages)
}
if ok {
found = append(found, v)
}
}
return found, nil
}
// DoAll implements the Set interface.
func (s *set) DoAll(f func(v interface{}) error) error {
for v := range s.values {
if err := f(v); err != nil {
return errors.Annotate(err, ErrDoAll, errorMessages)
}
}
return nil
}
// Len implements the Set interface.
func (s *set) Len() int {
return len(s.values)
}
// Deflate implements the Set interface.
func (s *set) Deflate() {
s.values = make(map[interface{}]struct{})
}
// Deflate implements the Stringer interface.
func (s *set) String() string {
all := s.All()
return fmt.Sprintf("%v", all)
}
//--------------------
// STRING SET
//--------------------
// stringSet implements the StringSet interface.
type stringSet struct {
values map[string]struct{}
}
// NewStringSet creates a string set with the passed values
// as initial content.
func NewStringSet(vs ...string) StringSet {
s := &stringSet{make(map[string]struct{})}
s.Add(vs...)
return s
}
// Add implements the StringSet interface.
func (s *stringSet) Add(vs ...string) {
for _, v := range vs {
s.values[v] = struct{}{}
}
}
// Remove implements the StringSet interface.
func (s *stringSet) Remove(vs ...string) {
for _, v := range vs {
delete(s.values, v)
}
}
// Contains implements the StringSet interface.
func (s *stringSet) Contains(v string) bool {
_, ok := s.values[v]
return ok
}
// All implements the StringSet interface.
func (s *stringSet) All() []string {
all := []string{}
for v := range s.values {
all = append(all, v)
}
return all
}
// FindAll implements the StringSet interface.
func (s *stringSet) FindAll(f func(v string) (bool, error)) ([]string, error) {
found := []string{}
for v := range s.values {
ok, err := f(v)
if err != nil {
return nil, errors.Annotate(err, ErrFindAll, errorMessages)
}
if ok {
found = append(found, v)
}
}
return found, nil
}
// DoAll implements the StringSet interface.
func (s *stringSet) DoAll(f func(v string) error) error {
for v := range s.values {
if err := f(v); err != nil {
return errors.Annotate(err, ErrDoAll, errorMessages)
}
}
return nil
}
// Len implements the StringSet interface.
func (s *stringSet) Len() int {
return len(s.values)
}
// Deflate implements the StringSet interface.
func (s *stringSet) Deflate() {
s.values = make(map[string]struct{})
}
// Deflate implements the Stringer interface.
func (s *stringSet) String() string {
all := s.All()
return fmt.Sprintf("%v", all)
}
// EOF
|
