Creating ColdFusion's missing "instanceof" method
Posted on 2006-04-08 10:51 Mozier 阅读(1279) 评论(0) 编辑 收藏 举报
在ColdFusion中没有instanceof关健字，所以只能自己写个函数代替，用来比较一个对象是否是另
一个类的实例：
一个类的实例：
1 <cffunction name="isInstanceOf" access="public" returntype="Boolean" output="false">
2 <cfargument name="obj" type="any" required="true"/>
3 <cfargument name="reqType" type="string" required="true" />
4 <cfset var searchMd = getMetaData(obj) />
5 <cfif searchMd.name IS reqType >
6 <cfreturn true />
7 <cfelse>
8 <cfloop condition="#StructKeyExists(searchMd, "extends")#">
9 <cfset searchMd = searchMd.extends />
10 <cfif searchMd.name IS reqType>
11 <cfreturn true />
12 </cfif>
13 </cfloop>
14 </cfif>
15 <cfreturn false />
16 </cffunction>
17
同时可以参考Hal Helms的BaseComponent.cfc中的isInstanceOf函数.
2 <cfargument name="obj" type="any" required="true"/>
3 <cfargument name="reqType" type="string" required="true" />
4 <cfset var searchMd = getMetaData(obj) />
5 <cfif searchMd.name IS reqType >
6 <cfreturn true />
7 <cfelse>
8 <cfloop condition="#StructKeyExists(searchMd, "extends")#">
9 <cfset searchMd = searchMd.extends />
10 <cfif searchMd.name IS reqType>
11 <cfreturn true />
12 </cfif>
13 </cfloop>
14 </cfif>
15 <cfreturn false />
16 </cffunction>
17
