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88 lines
2.1 KiB
88 lines
2.1 KiB
// Copyright 2020 beego-dev
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package utils
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type KV interface {
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GetKey() interface{}
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GetValue() interface{}
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}
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// SimpleKV is common structure to store key-value pairs.
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// When you need something like Pair, you can use this
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type SimpleKV struct {
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Key interface{}
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Value interface{}
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}
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var _ KV = new(SimpleKV)
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func (s *SimpleKV) GetKey() interface{} {
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return s.Key
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}
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func (s *SimpleKV) GetValue() interface{} {
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return s.Value
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}
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// KVs interface
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type KVs interface {
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GetValueOr(key interface{}, defValue interface{}) interface{}
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Contains(key interface{}) bool
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IfContains(key interface{}, action func(value interface{})) KVs
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}
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// SimpleKVs will store SimpleKV collection as map
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type SimpleKVs struct {
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kvs map[interface{}]interface{}
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}
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var _ KVs = new(SimpleKVs)
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// GetValueOr returns the value for a given key, if non-existent
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// it returns defValue
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func (kvs *SimpleKVs) GetValueOr(key interface{}, defValue interface{}) interface{} {
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v, ok := kvs.kvs[key]
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if ok {
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return v
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}
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return defValue
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}
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// Contains checks if a key exists
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func (kvs *SimpleKVs) Contains(key interface{}) bool {
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_, ok := kvs.kvs[key]
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return ok
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}
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// IfContains invokes the action on a key if it exists
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func (kvs *SimpleKVs) IfContains(key interface{}, action func(value interface{})) KVs {
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v, ok := kvs.kvs[key]
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if ok {
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action(v)
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}
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return kvs
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}
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// NewKVs creates the *KVs instance
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func NewKVs(kvs ...KV) KVs {
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res := &SimpleKVs{
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kvs: make(map[interface{}]interface{}, len(kvs)),
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}
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for _, kv := range kvs {
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res.kvs[kv.GetKey()] = kv.GetValue()
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}
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return res
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}
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