Token objAuthenticationInfo = (Token)JSON.deserialize (response.getbody (), Token.class); if (objAuthenticationInfo.ACCESS_TOKEN != null) { <snipped> } return null; postCallout () is designed to return null if it doesn't get a valid Token structure back.
What is system null pointer exception in Salesforce?
System.NullPointerException: Attempt to de-reference a null object is very common error in apex class. It occurs when your variable (sobject, list, set or any other data type) is not initialized (allocated memory).
What is attempt to de-reference a null object error?
It occurs when your variable (sobject, list, set or any other data type) is not initialized (allocated memory). In order to use the non primitive data type in the code we need to initialize the memory first. If we don’t do that it may result in Attempt to de-reference a null object error.
Why is the PDF file in Salesforce currently null?
pdf is currently null because you are checking if the type value is 'Monthly Escrow Statement'. This is a good example of when to use Constants or Custom Labels to prevent errors like this from occuring. Thanks for contributing an answer to Salesforce Stack Exchange!
Why is my soql query throwing null errors?
Even though you are querying for it in your SOQL, its possible it could be empty (null). Since you are invoking a substring method on the string, you need to ensure it is not null. Since its null in this case, it is throwing the "Attempt to de-reference a null object." error.
What does attempt to de-reference a null object mean?
Description. In Salesforce CPQ, the error 'Attempt to de-reference null object' is caused by a line of code that is searching for a value that does not exist because a particular field value is null. This error can also occur when a required Look-up field is missing a record value. Resolution.
How do you get the null pointer exception in Apex?
This error is caused by a line of code that is trying to use an object that has not been instantiated, or an object's attribute that has not been initialized. NOTE: If the field Site was left empty, it will generate the error message as well.
How do I fix system NullPointerException attempt to de reference a null object?
The error “System. NullPointerException: Attempt to de-reference a null object” normally occurs when you try to reference an object which has not been initialized or has null values. To avoid this you need to make sure that all the sObjects in your class are initialized, preferably in the constructor. Hope this helps.
What is query exception in Salesforce?
QueryException: QueryException occurs when there is a problem in SOQL queries such as assigning a query that returns no records or more than one record to a single sObject variable. Ex: try { // This statement doesn't cause an exception, // if we don't have a problem in SOQL Queries.
System.NullPointerException: Attempt to de-reference a null object
System.NullPointerException: Attempt to de-reference a null object is very common error in apex class. It occurs when your variable (sobject, list, set or any other data type) is not initialized (allocated memory). In order to use the non primitive data type in the code we need to initialize the memory first.
How to solve System.NullPointerException: Attempt to de-reference a null object error
System.NullPointerException: Attempt to de-reference a null object is very common error in apex class. It occurs when your variable (sobject, list, set or any other data type) is not initialized (allocated memory). In order to use the non primitive data type in the code we need to initialize the memory first.