Sample Code:
String objectLabel = SObjectType.YourObjectApiName__c.getLabel(); System.debug(objectLabel);
Following standard objects don’t support DML operations, but it supports SOQL query.
SOQL Query:
SELECT Id, Label, MasterLabel, PluralLabel, DeveloperName, QualifiedApiName, KeyPrefix, NamespacePrefix FROM EntityDefinition WHERE IsCustomSetting = false Order by QualifiedApiName
Apex Class:
public class ConvertsObjectToJSON
{
//Return the JSON string from record Id
public static string getJsonFromSObject(Id recordId)
{
String jsonData = '';
try{
if(String.isNotBlank(recordId))
{
String sObjectFields = '';
//Get sObject Name
String objName = recordId.getSObjectType().getDescribe().getName();
//Getting the fields information
Map<String, Schema.sObjectField> sObjectFieldMap = Schema.getGlobalDescribe().get(objName).getDescribe().fields.getMap();
//Map key is the field API name and value is the field data type.
Map<String, String> fieldMap = new Map<String, String>();
for(Schema.SObjectField sfield: sObjectFieldMap.Values()){
Schema.DescribeFieldResult fieldDesc = sfield.getDescribe();
fieldMap.put(fieldDesc.getName(), fieldDesc.getType().name());
}
//Create query with all fields
for(String field: fieldMap.keySet()){
sObjectFields += field+',';
}
sObjectFields = sObjectFields.removeEnd(',');
//Dynamic SOQL Query with all fields
String soqlQuery = 'SELECT '+ sObjectFields +' FROM '+objName+' WHERE Id =: recordId';
//Execute the SOQL query
sObject sObj = Database.Query(soqlQuery);
//Create JSON
JSONGenerator gen = JSON.createGenerator(true);
gen.writeStartArray();
gen.writeStartObject();
gen.writeFieldName('attributes');
gen.writeStartObject();
gen.writeStringField('type', objName);
gen.writeEndObject();
gen.writeFieldName('fields');
gen.writeStartObject();
for(String field: fieldMap.keySet()){
if(sObj.get(field) != null){
gen.writeStringField(field, String.ValueOf(sObj.get(field)));
}
else{
gen.writeStringField(field, '');
}
}
gen.writeEndObject();
gen.writeEndObject();
gen.writeEndArray();
//Getting the JSON String Data
jsonData = gen.getAsString();
}
}
catch(Exception ex){
}
return jsonData;
}
}
Invoke the method:
String jsonData = ConvertsObjectToJSON.getJsonFromSObject('001B000000pA7sV');
system.debug('jsonData-' + jsonData);
Sample Code:
Here in below code I’m getting all required fields of “Account” object.
Map<String, Schema.SObjectType> mapObj = Schema.getGlobalDescribe();
Schema.SObjectType sObjType = mapObj.get('Account');
Schema.DescribeSObjectResult objDescribe = sObjType.getDescribe();
Map<String,Schema.SObjectField> mapFields = objDescribe.fields.getMap();
List<String> requiredFieldList = new List<String>();
for(String obj : mapFields.keyset()) {
Schema.DescribeFieldResult describeField = mapFields.get(obj).getDescribe();
if (describeField.isCreateable() && !describeField.isNillable() && !describeField.isDefaultedOnCreate()) {
requiredFieldList.add(obj);
System.debug(obj);
}
}