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rule_container.go
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/
rule_container.go
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package rule
import (
"regexp"
"strings"
"github.com/juju/errors"
)
type syncDescRegexp struct {
*SyncDesc
reg *regexp.Regexp
}
// ruleContainer support constant key and regexp key search
type ruleContainer struct {
consts map[string]*SyncDesc
regs []*syncDescRegexp
}
func (c *ruleContainer) init() {
c.consts = make(map[string]*SyncDesc)
c.regs = make([]*syncDescRegexp, 0, 64)
}
func (c *ruleContainer) add(key string, desc *SyncDesc) error {
if strings.HasPrefix(key, "^") && strings.HasSuffix(key, "$") {
// Key with regexp expression
r, err := regexp.Compile(key)
if nil != err {
return errors.Trace(err)
}
c.regs = append(c.regs, &syncDescRegexp{reg: r, SyncDesc: desc})
} else {
c.consts[key] = desc
}
return nil
}
func (c *ruleContainer) find(key string) *SyncDesc {
if nil == c.consts && nil == c.regs {
return nil
}
// Search for constant map
v, ok := c.consts[key]
if ok {
return v
}
// Search for regexps
for _, v := range c.regs {
if v.reg.MatchString(key) {
return v.SyncDesc
}
}
return nil
}
func newRuleContainer() *ruleContainer {
c := &ruleContainer{}
c.init()
return c
}