/
filter.go
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/
filter.go
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/*
* Copyright 2014 Xuyuan Pang <xuyuanp # gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package glogger
import "container/list"
// Filter interface
type Filter interface {
ConfigLoader
Filter(rec *Record) bool
}
var filterRegister = NewRegister()
// RegisterFilter register a Filter with the name
func RegisterFilter(name string, filter Filter) {
filterRegister.Register(name, filter)
}
// GetFilter return a Filter regeistered by the name
func GetFilter(name string) Filter {
if v := filterRegister.Get(name); v != nil {
return v.(Filter)
}
return nil
}
// GroupFilter struct
type GroupFilter struct {
filters *list.List
}
// AddFilter add a filter to a filter list
func (f *GroupFilter) AddFilter(ft Filter) {
if f.filters == nil {
f.filters = list.New()
}
f.filters.PushBack(ft)
}
// Filter return true only if all the filters return true, or false if not
func (f *GroupFilter) Filter(rec *Record) bool {
if f.filters == nil {
return true
}
for e := f.filters.Front(); e != nil; e = e.Next() {
filter := e.Value.(Filter)
if !filter.Filter(rec) {
return false
}
}
return true
}
// LoadConfig load configuration from a map, not implemented currenttly
func (f *GroupFilter) LoadConfig(config map[string]interface{}) error {
return nil
}