{"id":767,"date":"2010-05-21T16:08:49","date_gmt":"2010-05-21T10:38:49","guid":{"rendered":"http:\/\/www.tothenew.com\/blog\/?p=767"},"modified":"2016-12-19T15:05:48","modified_gmt":"2016-12-19T09:35:48","slug":"injecting-method-to-convert-string-number-to-number-having-brackets","status":"publish","type":"post","link":"https:\/\/www.tothenew.com\/blog\/injecting-method-to-convert-string-number-to-number-having-brackets\/","title":{"rendered":"Injecting method to convert String number to number (Having , $ brackets)"},"content":{"rendered":"

Recently in my project we have use case where users have the habit of entering number as 100,000 and they write the -ve numbers as (100,000). Some times they also pur $ with the number field
\nInitially when we were not aware of this we were populating the object like<\/p>\n

\r\nExpense expense =new Expense(params)\r\n<\/pre>\n
This throw exception as the user type “,” in the number then we moved to <\/p>\n
\r\nbindData(expense,params)\r\n<\/pre>\n
This handles the number with “,” very gracefully.
\nNow the real use case came into picture where we need to ignore $ and change the number enclosed with brackets to -ve number. We dont want to change our code for this so we came up with the solution of injecting a method in String class which will do all the things for us and we added a method in the project bootstrap which is something like . <\/p>\n
\r\nString.metaClass.convertToNumber = {\r\n            String stringNumber = delegate?.toString()\r\n            stringNumber = stringNumber.replaceAll(\"[,]|[(]|[)]|[\\$]\",'')\r\n            Float number = 0\r\n            if (stringNumber.isNumber()) {\r\n                number = Float.parseFloat(stringNumber)\r\n                if (delegate?.toString()?.endsWith(\")\")) {\r\n                    number = -number\r\n                }\r\n            }\r\n            return number\r\n        }\r\n<\/pre>\n
And we added the line in the Application Filter <\/p>\n
\r\nparams?.totalCost = params?.totalCost?.convertToNumber()\r\n<\/pre>\n
It just do the trick for us and we dont need to change our code. I think its one of the correct way to handle such requirement <\/p>\n
<\/p>\n
Hope it helps
\nUday Pratap Singh<\/a>
\nuday@intelligrape.com<\/a>
\nhttps:\/\/twitter.com\/meudaypratap<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Recently in my project we have use case where users have the habit of entering number as 100,000 and they write the -ve numbers as (100,000). Some times they also pur $ with the number field Initially when we were not aware of this we were populating the object like Expense expense =new Expense(params) This […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":1,"footnotes":""},"categories":[7],"tags":[244,242],"class_list":["post-767","post","type-post","status-publish","format-standard","hentry","category-grails","tag-convert-string-to-number","tag-groovy-metaprogramming"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t