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How to convert List of SObject to map?
You can get the name of the Sobject using the method getSObjectType(); Try the below code where I have used Map to store the SobjectType and the List of all records of that Sobject. MapList> objMap = new Map<Schema. SObjectType, List>(); for(Sobject obj : sObj){ Schema.
Can you create a map and write SOQL query?
When working with SOQL queries, maps can be populated from the results returned by the SOQL query. The map key should be declared with an ID or String data type, and the map value should be declared as an sObject data type. The new operator uses the returned list of accounts to create a map.
What is type casting in Salesforce?
This means that Apex enables casting , that is, a data type of one class can be assigned to a data type of another class, but only if one class is a subclass of the other class. Use casting when you want to convert an object from one data type to another.
What is map in salesforce?
A map is a collection of key-value pairs where each unique key maps to a single value. Keys and values can be any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. This table represents a map of countries and currencies: Country (Key)
How do I iterate through an apex map?
One method in particular can be used to loop through a map in Apex, this method is keySet(). The keyset method returns all of the keys in the map and you can access the value associated with the key inside a loop.
How do you implement type casting in Java?
In Java, there are two types of casting:
- Widening Casting (automatically) – converting a smaller type to a larger type size. byte -> short -> char -> int -> long -> float -> double.
- Narrowing Casting (manually) – converting a larger type to a smaller size type. double -> float -> long -> int -> char -> short -> byte.
How to create a map [ string, customobject ]?
If I use Map myMap = new Map ( [Select z.Name, z.Id From CustomObject__c z]); i have a map where the key is my CustomObject.Id and I want it to be CustomObject.Name. For that you have to iterate through the list and keep putting the key and objects.
What do you need to know about sobjects maps?
Maps of sObjects sObject Map Considerations Dynamic Apex Apex Security and Sharing Custom Settings Running Apex Debugging, Testing, and Deploying Apex Apex Reference
Can a map < string, sobject > be an object?
The problem is, even though this is an entirely realistic scenario, it isn’t one recognized by the Apex compiler, which will reject: Incompatible types since an instance of Map is never an instance of Map
Can a map be an instance of an object?
Incompatible types since an instance of Map is never an instance of Map This really doesn’t make much sense since I would expect every String to be an Object and every SObject to be an Object, and therefore I would expect every Map to be an instance of Map .