mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-18 03:24:05 -08:00
c954cd9d1d
This creates a new `model` directory and moves all data-model related packages over there: exemplar labels relabel rulefmt textparse timestamp value All the others are more or less utilities and have been moved to `util`: gate logging modetimevfs pool runtime Signed-off-by: beorn7 <beorn@grafana.com>
121 lines
2.7 KiB
Go
121 lines
2.7 KiB
Go
// Copyright 2017 The Prometheus Authors
|
|
// 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 labels
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
// MatchType is an enum for label matching types.
|
|
type MatchType int
|
|
|
|
// Possible MatchTypes.
|
|
const (
|
|
MatchEqual MatchType = iota
|
|
MatchNotEqual
|
|
MatchRegexp
|
|
MatchNotRegexp
|
|
)
|
|
|
|
var matchTypeToStr = [...]string{
|
|
MatchEqual: "=",
|
|
MatchNotEqual: "!=",
|
|
MatchRegexp: "=~",
|
|
MatchNotRegexp: "!~",
|
|
}
|
|
|
|
func (m MatchType) String() string {
|
|
if m < MatchEqual || m > MatchNotRegexp {
|
|
panic("unknown match type")
|
|
}
|
|
return matchTypeToStr[m]
|
|
}
|
|
|
|
// Matcher models the matching of a label.
|
|
type Matcher struct {
|
|
Type MatchType
|
|
Name string
|
|
Value string
|
|
|
|
re *FastRegexMatcher
|
|
}
|
|
|
|
// NewMatcher returns a matcher object.
|
|
func NewMatcher(t MatchType, n, v string) (*Matcher, error) {
|
|
m := &Matcher{
|
|
Type: t,
|
|
Name: n,
|
|
Value: v,
|
|
}
|
|
if t == MatchRegexp || t == MatchNotRegexp {
|
|
re, err := NewFastRegexMatcher(v)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
m.re = re
|
|
}
|
|
return m, nil
|
|
}
|
|
|
|
// MustNewMatcher panics on error - only for use in tests!
|
|
func MustNewMatcher(mt MatchType, name, val string) *Matcher {
|
|
m, err := NewMatcher(mt, name, val)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return m
|
|
}
|
|
|
|
func (m *Matcher) String() string {
|
|
return fmt.Sprintf("%s%s%q", m.Name, m.Type, m.Value)
|
|
}
|
|
|
|
// Matches returns whether the matcher matches the given string value.
|
|
func (m *Matcher) Matches(s string) bool {
|
|
switch m.Type {
|
|
case MatchEqual:
|
|
return s == m.Value
|
|
case MatchNotEqual:
|
|
return s != m.Value
|
|
case MatchRegexp:
|
|
return m.re.MatchString(s)
|
|
case MatchNotRegexp:
|
|
return !m.re.MatchString(s)
|
|
}
|
|
panic("labels.Matcher.Matches: invalid match type")
|
|
}
|
|
|
|
// Inverse returns a matcher that matches the opposite.
|
|
func (m *Matcher) Inverse() (*Matcher, error) {
|
|
switch m.Type {
|
|
case MatchEqual:
|
|
return NewMatcher(MatchNotEqual, m.Name, m.Value)
|
|
case MatchNotEqual:
|
|
return NewMatcher(MatchEqual, m.Name, m.Value)
|
|
case MatchRegexp:
|
|
return NewMatcher(MatchNotRegexp, m.Name, m.Value)
|
|
case MatchNotRegexp:
|
|
return NewMatcher(MatchRegexp, m.Name, m.Value)
|
|
}
|
|
panic("labels.Matcher.Matches: invalid match type")
|
|
}
|
|
|
|
// GetRegexString returns the regex string.
|
|
func (m *Matcher) GetRegexString() string {
|
|
if m.re == nil {
|
|
return ""
|
|
}
|
|
return m.re.GetRegexString()
|
|
}
|