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tag.go
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tag.go
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// Copyright 2018 John Deng (hi.devops.io@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 inject
import (
"hidevops.io/hiboot/pkg/factory"
"hidevops.io/hiboot/pkg/system"
"hidevops.io/hiboot/pkg/utils/cmap"
"reflect"
"strings"
)
// Tag the interface of Tag
type Tag interface {
// Init init tag
Init(configurableFactory factory.InstantiateFactory)
// Decode parse tag and do dependency injection
Decode(object reflect.Value, field reflect.StructField, tag string) (retVal interface{})
// Properties get properties
Properties() cmap.ConcurrentMap
// IsSingleton check if it is Singleton
IsSingleton() bool
}
// BaseTag is the base struct of tag
type BaseTag struct {
instantiateFactory factory.InstantiateFactory
properties cmap.ConcurrentMap
systemConfig *system.Configuration
}
// IsSingleton check if it is Singleton
func (t *BaseTag) IsSingleton() bool {
return false
}
// Init init the tag
func (t *BaseTag) Init(configurableFactory factory.InstantiateFactory) {
t.instantiateFactory = configurableFactory
}
// ParseProperties parse properties
func (t *BaseTag) ParseProperties(tag string) cmap.ConcurrentMap {
t.properties = cmap.New()
args := strings.Split(tag, ",")
for _, v := range args {
//log.Debug(v)
n := strings.Index(v, "=")
if n > 0 {
key := v[:n]
val := v[n+1:]
if key != "" && val != "" {
// check if val contains reference or env
// TODO: should lookup certain config instead of for loop
replacedVal := t.instantiateFactory.Replace(val)
t.properties.Set(key, replacedVal)
}
}
}
return t.properties
}
// Properties get properties
func (t *BaseTag) Properties() cmap.ConcurrentMap {
return t.properties
}
// Decode no implementation for base tag
func (t *BaseTag) Decode(object reflect.Value, field reflect.StructField, tag string) (retVal interface{}) {
return nil
}