To find Custom objects inside apex

Question

I want to check whether a given object is standard or custom. At present I have a method which identifies custom objects but that is taking too much CPU time, which leads to salesforce exception.

public static Boolean getAllCustomSObjects(String objectname)
{Boolean customobject;
List<String> sObjectList = new List<String>();
for(Schema.SObjectType objTyp : Schema.getGlobalDescribe().Values())
{
    Schema.DescribeSObjectResult describeSObjectResultObj = objTyp.getDescribe();
    if(describeSObjectResultObj.isCustom())
    { 
        String name = objTyp.getDescribe().getName();
        // Exclude all the unwanted Sobjects e.g. History, Share etc..
   /*     if(!name.containsignorecase('history') && !name.containsignorecase('tag')&&
         !name.containsignorecase('share') && !name.containsignorecase('feed'))
        {
            SobjectList.add(name);
        } */
        if(name.contains(objectname))
        {customobject=true;
        System.debug('Custom object found');
        }
        else
        {
         customobject=false;
         System.debug('Custom object not found');
        }
    }
}
system.debug('SObjectList****' + SObjectList);
return customobject;
}

Instead of fetching all the custom object names and checking whether the the given object name is a custom object, I want to check the object directly. I tried to modify the line

Schema.DescribeSObjectResult describeSObjectResultObj = objTyp.getDescribe(); 

and to give the object name as parameter for DescribeSObjectResult but it was throwing error.Do anyone help in this?

Answer 1

You don't need a for loop here. You can do something like

public static Boolean checkObjectType(String objectname) {
    SObjectType objToken = Schema.getGlobalDescribe().get(ObjectNameval);
    if(objToken  != null && objToken.getDescribe().isCustom())
        return true;
    return false;
}

This method will return true if it is custom object or false if it is not. Also one major difference is All custom objects end with __c with Standard object don't have these suffix.

Answer 2

you can use SObjectType class methods to find out. method mentioned by @Tushar gives me TRUE if it is custom object.

public static Boolean checkObjectType(String objectname) {
   SObjectType objToken = Schema.getGlobalDescribe().get(objectname);
   if(objToken  != null && objToken.getDescribe().isCustom()) {
     return true;
   } else {
     return false;
   }
}

pass the objectname as a String and it will return TRUE if is a custom object.

And the easiest way is to use check the suffix '__c' at the end of name. use String class method String s = 'Custom_object__c'; System.assert(s.endsWith('__c'));

String Class

SObjectType Class

Answer 3

@Tushar, Thanks your code was working. Since I was trying to find the custom objects from SOQL a suffix'__r' will be appended to all the objects with relationships.That's why first I got error but then I did small change to the code. ie.I replaced the suffix of objects from '__r' to '__c'. After doing this the code worked fine.

public static String checkObjectType(String objectname) {
String obj=objectname.replace('__r','__c');
SObjectType objToken = Schema.getGlobalDescribe().get(obj);
if(objToken  != null && objToken.getDescribe().isCustom()) {
 return 'true';
} else {
 return 'false';
}
}