54 lines
1.4 KiB
Java
54 lines
1.4 KiB
Java
var staticHGKeyRE = require('../static/staticHGKeyRE')
|
||
|
||
var helperGetHGSKeys = require('./helperGetHGSKeys')
|
||
var hasOwnProp = require('./hasOwnProp')
|
||
var isUndefined = require('./isUndefined')
|
||
var eqNull = require('./eqNull')
|
||
|
||
/**
|
||
* 获取对象的属性的值，如果值为 undefined，则返回默认值
|
||
* @param {Object/Array} obj 对象
|
||
* @param {String/Function} property 键、路径
|
||
* @param {Object} defaultValue 默认值
|
||
* @return {Object}
|
||
*/
|
||
function get (obj, property, defaultValue) {
|
||
if (eqNull(obj)) {
|
||
return defaultValue
|
||
}
|
||
var result = pathGet(obj, property)
|
||
return isUndefined(result) ? defaultValue : result
|
||
}
|
||
|
||
function valGet (obj, key) {
|
||
var matchs = key ? key.match(staticHGKeyRE) : ''
|
||
return matchs ? (matchs[1] ? (obj[matchs[1]] ? obj[matchs[1]][matchs[2]] : undefined) : obj[matchs[2]]) : obj[key]
|
||
}
|
||
|
||
function pathGet (obj, property) {
|
||
if (obj) {
|
||
var rest, props, len
|
||
var index = 0
|
||
if (obj[property] || hasOwnProp(obj, property)) {
|
||
return obj[property]
|
||
} else {
|
||
props = helperGetHGSKeys(property)
|
||
len = props.length
|
||
if (len) {
|
||
for (rest = obj; index < len; index++) {
|
||
rest = valGet(rest, props[index])
|
||
if (eqNull(rest)) {
|
||
if (index === len - 1) {
|
||
return rest
|
||
}
|
||
return
|
||
}
|
||
}
|
||
}
|
||
return rest
|
||
}
|
||
}
|
||
}
|
||
|
||
module.exports = get
|