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Daniel Peaper 8Daniel Peaper 8 

How To Loop Through Parsed JSON

Hi All, I'm looking for some advice on best practice. I want to loop through Options and I've come up with the following solution which actually works. What I want to know is whether or not my method of a loop within a loop is best practice or if there is a better way?

String json = '{'+
    '  \"TrackingCategories\": ['+
    '    {'+
    '      \"Name\": \"Region\",'+
    '      \"Status\": \"ACTIVE\",'+
    '      \"TrackingCategoryID\": \"351953c4-8127-4009-88c3-f9cd8c9cbe9f\",'+
    '      \"Options\": ['+
    '        {'+
    '          \"TrackingOptionID\": \"ce205173-7387-4651-9726-2cf4c5405ba2\",'+
    '          \"Name\": \"Eastside\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"6eb12fdf-63de-4033-98df-be679d84e3c2\",'+
    '          \"Name\": \"North\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"6159bdd4-b634-4338-a664-e929aa73f70f\",'+
    '          \"Name\": \"South\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"161ad543-97ab-4436-8213-e0d794b1ea90\",'+
    '          \"Name\": \"West Coast\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        }'+
    '      ]'+
    '    }'+
    '  ]'+
    '}';
TrackingOptionsResponse obj = TrackingOptionsResponse.parse(json);
System.debug('obj='+obj);



for(TrackingOptionsResponse.TrackingCategories r :obj.TrackingCategories){
    system.debug('r='+r.Name);
    System.debug('r2='+r.Options);
    for(TrackingOptionsResponse.Options l :r.options){
        System.debug('l='+l.Name);
    }
}

Thanks,

Dan

Best Answer chosen by Daniel Peaper 8
Maharajan CMaharajan C
Hi Daniel,

For the above data Loop inside loop is fine only... It's small amount of data... If it is a trigger you have to worry about loop inside loop...

And you can use the below way also for the above JSON instead of more looping:
  
String json = '{'+
    '  \"TrackingCategories\": ['+
    '    {'+
    '      \"Name\": \"Region\",'+
    '      \"Status\": \"ACTIVE\",'+
    '      \"TrackingCategoryID\": \"351953c4-8127-4009-88c3-f9cd8c9cbe9f\",'+
    '      \"Options\": ['+
    '        {'+
    '          \"TrackingOptionID\": \"ce205173-7387-4651-9726-2cf4c5405ba2\",'+
    '          \"Name\": \"Eastside\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"6eb12fdf-63de-4033-98df-be679d84e3c2\",'+
    '          \"Name\": \"North\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"6159bdd4-b634-4338-a664-e929aa73f70f\",'+
    '          \"Name\": \"South\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"161ad543-97ab-4436-8213-e0d794b1ea90\",'+
    '          \"Name\": \"West Coast\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        }'+
    '      ]'+
    '    }'+
    '  ]'+
    '}';


//system.debug(' --> ' +  json );

TrackingOptionsResponse obj = TrackingOptionsResponse.parse(json);
//System.debug('obj ==> '+obj);


system.debug( ' Name ==> ' + obj.TrackingCategories[0].Name );
for(TrackingOptionsResponse.Options r : obj.TrackingCategories[0].options){
        System.debug(' Optioon Name ==> '+ r.Name);
}


Thanks,
Maharajan.C
 

All Answers

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Maharajan CMaharajan C
Hi Daniel,

For the above data Loop inside loop is fine only... It's small amount of data... If it is a trigger you have to worry about loop inside loop...

And you can use the below way also for the above JSON instead of more looping:
  
String json = '{'+
    '  \"TrackingCategories\": ['+
    '    {'+
    '      \"Name\": \"Region\",'+
    '      \"Status\": \"ACTIVE\",'+
    '      \"TrackingCategoryID\": \"351953c4-8127-4009-88c3-f9cd8c9cbe9f\",'+
    '      \"Options\": ['+
    '        {'+
    '          \"TrackingOptionID\": \"ce205173-7387-4651-9726-2cf4c5405ba2\",'+
    '          \"Name\": \"Eastside\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"6eb12fdf-63de-4033-98df-be679d84e3c2\",'+
    '          \"Name\": \"North\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"6159bdd4-b634-4338-a664-e929aa73f70f\",'+
    '          \"Name\": \"South\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        },'+
    '        {'+
    '          \"TrackingOptionID\": \"161ad543-97ab-4436-8213-e0d794b1ea90\",'+
    '          \"Name\": \"West Coast\",'+
    '          \"Status\": \"ACTIVE\"'+
    '        }'+
    '      ]'+
    '    }'+
    '  ]'+
    '}';


//system.debug(' --> ' +  json );

TrackingOptionsResponse obj = TrackingOptionsResponse.parse(json);
//System.debug('obj ==> '+obj);


system.debug( ' Name ==> ' + obj.TrackingCategories[0].Name );
for(TrackingOptionsResponse.Options r : obj.TrackingCategories[0].options){
        System.debug(' Optioon Name ==> '+ r.Name);
}


Thanks,
Maharajan.C
 
This was selected as the best answer
Daniel Peaper 8Daniel Peaper 8
Thanks @Maharajan.C, that makes perfect sense.