Solved

Simple question: hows to dynamically reference a class object

Posted on 2011-03-16
7
330 Views
Last Modified: 2012-08-14
Hi i  need a little help as my brain has gone dark on me :-)

i have the below object backupCartItem (simplified)

and i have a function which needs to reference different properties within the different contained objects.

public function createEndorcementItem( propertyClass:String, propertyName:String ):void
{
var val:* = backupCartItem[ propertyClass ][ propertyName ];
trace( val.toString();
}

public function doSomething():void
{
createEndorcementItem( 'sessionVO.primaryInsurie', 'AGE_NOW');
}


the above little script example should set val to being
backupCartItem.sessionVO.primaryInsurie.AGE_NOW

but it throws an error

Property sessionVO.primaryInsurie not found on com.travins.cairngorm.model.CartItemVO

how can i dynamically reference the object please






      backupCartItem      com.travins.cairngorm.model.CartItemVO (@70bd781)      
            admin_fee      0      
            id      1174 [0x496]      
            sessionVO      com.travins.cairngorm.model.CurrentSessionVO (@27a2881)      
                  ADULT_COUNT      1      
                  CHILD_COUNT      0      
                  primaryInsurie      com.travins.cairngorm.model.InsurieVO (@1fa5dc1)      
                        AGE_AT_START_TIME      40 [0x28]      
                        AGE_ERROR      ""      
                        AGE_IS_VALID      true      
                        AGE_NOW      40 [0x28]      
                        COUNTRY_ID      1      
                        DATE_OF_BIRTH      Date (@71dbcd1)      
0
Comment
Question by:cghrmauritius
  • 5
  • 2
7 Comments
 
LVL 29

Accepted Solution

by:
dgofman earned 500 total points
ID: 35149658
Hi,
You mixed in your code setter and getter that reason why you confused yourself.
Check if this what you want:

private var backupCartItem:Object;

			public function createEndorcementItem( propertyClass:String, propertyName:String, value:*):void
			{
				if(backupCartItem == null)
					backupCartItem = {};
				if(backupCartItem[propertyClass] == undefined)
					backupCartItem[propertyClass] = {};
				backupCartItem[propertyClass][propertyName] = value;
			}
			
			public function getEndorcementItem( propertyClass:String, propertyName:String ):void
			{
				var val:* = backupCartItem[propertyClass][propertyName];
				trace( val.toString());
			}
			
			public function doSomething():void
			{
				createEndorcementItem( 'sessionVO.primaryInsurie', 'AGE_NOW', 25);
				getEndorcementItem( 'sessionVO.primaryInsurie', 'AGE_NOW');
			}

Open in new window

0
 

Author Comment

by:cghrmauritius
ID: 35149839
humm no sorry i needed it the other way round im not trying to set the value im trying to get the value of

backupCartItem[ propertyClass ][ propertyName ]

i know there is a value cause if i query it manually as

backupCartItem.sessionVO.primaryInsurie.AGE_NOW  i do ge the cirrect value but i cant get it when using the square brackets

any ideas please
0
 

Author Comment

by:cghrmauritius
ID: 35150016
i see yuor example does work, i must have something wrong with my backupcartItem but i dont understand why because i can get the value if done manually

thanks i will assign you the points

thanks for your time
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 

Author Closing Comment

by:cghrmauritius
ID: 35150021
Thanks
0
 

Author Comment

by:cghrmauritius
ID: 35150077
Actually if checked in debuger your example isnt right im afraid

backupCartItem      Object (@8cb9421)      
      sessionVO.primaryInsurie      Object (@8cb93f9)      
            AGE_NOW      25 [0x19]      


as per my original which is what my object dump looks like

backupCartItem      com.travins.cairngorm.model.CartItemVO (@70bd781)      
             sessionVO      com.travins.cairngorm.model.CurrentSessionVO (@27a2881)      
                   primaryInsurie      com.travins.cairngorm.model.InsurieVO (@1fa5dc1)      
                        AGE_IS_VALID      true      
                        AGE_NOW      40 [0x28]      

please notice that in your example the primaryInsurie object isnt nested inside sessionVO

0
 

Author Comment

by:cghrmauritius
ID: 35150262
ok i have found a solution finally your comment gave me an idea which worked so thanks for the pointers


here is my solution but im sure its a dirty method and that there must be a cleaner way!!!

public function createEndorcementItem( propertyClass:String, propertyName:String ):void
{
	var arr:Array = propertyClass.split(".");
				
	var cur:Object;
	cur = backupCartItem;
				
	for each (var a:String in arr)
	{
		cur = cur[a];
	}
	var val:* = cur[propertyName];
}

Open in new window

0
 
LVL 29

Expert Comment

by:dgofman
ID: 35150302
I am very happy to know I helped you.
Regards,
David
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Color can increase conversions, create feelings of warmth or even incite people to get behind a cause. If you want your website to really impact site visitors, then it is vital to consider the impact color has on them.
Does your audience prefer people in photos or no people? How can you best highlight what you’re selling? What are your competitors doing, and what can you do that is different and unique from them?  Continue reading to learn how to make your images …
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
This video teaches users how to migrate an existing Wordpress website to a new domain.

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question