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System.NullPointerException | Apex script unhanded exception
I am getting NullPointerException for the below code. At second line(highlighted) the code is giving me exception.
Can anyone please suggest if there is any other way around or if I am missing anything. I can post the further code if required.
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public List<objectHistoryLine> getObjectHistory(){
Id myObjectId = String.valueOf(myObject.get('Id'));
//String myObjectIdString = String.valueOf(myObject.get('Id'));
String myObjectAPIName;
//String contactIdPrefix = Contact.SObjectType.getDescribe().getKeyPrefix();
Schema.DescribeSObjectResult objectDescription = myObject.getSObjectType().getDescribe();
myObjectFieldMap = objectDescription.fields.getMap();
objectLabel = String.valueOf(objectDescription.getLabel());
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Thanks in advance.
Can anyone please suggest if there is any other way around or if I am missing anything. I can post the further code if required.
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public List<objectHistoryLine> getObjectHistory(){
Id myObjectId = String.valueOf(myObject.get('Id'));
//String myObjectIdString = String.valueOf(myObject.get('Id'));
String myObjectAPIName;
//String contactIdPrefix = Contact.SObjectType.getDescribe().getKeyPrefix();
Schema.DescribeSObjectResult objectDescription = myObject.getSObjectType().getDescribe();
myObjectFieldMap = objectDescription.fields.getMap();
objectLabel = String.valueOf(objectDescription.getLabel());
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Thanks in advance.
Verify how are you filling the myObject, you can also use system.debug(myObject); to see if you have any data on the first line.
If it helps please mark as correct.
If you are still with issues please post entire code.
please post the code.
I am sharing my rest of the code may be you could suggest some more.
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public List<objectHistoryLine> getObjectHistory(){
Id myObjectId = String.valueOf(myObject.get('Id'));
//String myObjectIdString = String.valueOf(myObject.get('Id'));
String myObjectAPIName;
//String contactIdPrefix = Contact.SObjectType.getDescribe().getKeyPrefix();
Schema.DescribeSObjectResult objectDescription = myObject.getSObjectType().getDescribe();
myObjectFieldMap = objectDescription.fields.getMap();
objectLabel = String.valueOf(objectDescription.getLabel());
if(myObjectId != null){
myObjectAPIName = myObjectId.getSObjectType().getDescribe().getName();
String doubleUnderscoreC = '__c';
if(myObjectAPIName.endsWith(doubleUnderscoreC)){
mySObject = 'ParentId';
}else{
mySObject = myObjectAPIName+'Id';
}
}
//Get the name of thew history table
String objectHistoryTableName = objectDescription.getName();
//if we have a custom object we need to drop the 'c' off the end before adding 'History' to get the history tables name
if (objectDescription.isCustom()){
objectHistoryTableName = objectHistoryTableName.substring(0, objectHistoryTableName.length()-1);
}
objectHistoryTableName = objectHistoryTableName + 'History';
Schema.DescribeFieldResult objectHistoryFieldField = mySObjectTypeMap.get(objectHistoryTableName).getDescribe().fields.getMap().get('Field').getDescribe();
historyFieldPicklistValues = objectHistoryFieldField.getPickListValues();
list<objectHistoryLine> objectHistory = new list<objectHistoryLine>();
String prevDate = '';
if (recordLimit== null){
recordLimit = 100;
}
list<sObject> historyList = new list<sObject>();
if(myObjectId != null){
historyList = Database.query( 'SELECT CreatedDate,'+
'CreatedById,'+
'CreatedBy.Name,'+
'Field,'+
'NewValue,'+
'OldValue ' +
'FROM ' + objectHistoryTableName + ' ' +
'WHERE ' + mySObject + ' =\'' + myObjectId + '\' ' +
'ORDER BY CreatedDate DESC '+
'LIMIT ' + String.valueOf(recordLimit));
system.debug('### '+historyList.size()+' '+historyList);
}
if(Test.isRunningTest()){
Id accountRT = Schema.SObjectType.Account.RecordTypeInfosByName.get('Client').RecordTypeId;
objAccount = new Account();
objAccount.RecordTypeId = accountRT;
AccessSecurity.insertAsUser(objAccount,null);
Client_Territory_Detail__c ct= new Client_Territory_Detail__c(CMS_Contract_Number__c='H3305',PBP__c='015',Client__c=objAccount.id);
AccessSecurity.insertAsUser(ct,null);
historyList = new List<sObject>{}; //OldValue, NewValue not writeable
historyList.add(new Client_Territory_Detail__History(parentId=ct.id, Field='CMS_Contract_Number__c'));
historyList.add(new Client_Territory_Detail__History(parentId=ct.id, Field='created'));
//insert historyList;
// System.debug('@@History'+historyList);
}
for(Integer i = 0; i < historyList.size(); i++){
sObject historyLine = historyList.get(i);
Boolean isSFId = historyLine.get('oldValue') instanceof Id || historyLine.get('newValue') instanceof Id;
if (((historyLine.get('newValue') != null && !(string.valueOf(historyLine.get('newValue')).startsWith('005') || string.valueOf(historyLine.get('newValue')).startsWith('00G')))
|| (historyLine.get('oldValue') != null && !(string.valueOf(historyLine.get('oldValue')).startsWith('005') || string.valueOf(historyLine.get('oldValue')).startsWith('00G')))
||(historyLine.get('newValue') == null && historyLine.get('oldValue') == null)) && !isSFId){
objectHistoryLine tempHistory = new objectHistoryLine();
// Set the Date and who performed the action
if (null!=historyLine.get('CreatedDate') && String.valueOf(historyLine.get('CreatedDate')) != prevDate){
tempHistory.theDate = Datetime.valueOf(historyLine.get('CreatedDate')).format();
tempHistory.userId = String.valueOf(historyLine.get('CreatedById'));
//tempHistory.who = String.valueOf(historyLine.get('CreatedById'));
tempHistory.who = (String) historyLine.getSobject('CreatedBy').get('Name');
}
else{
tempHistory.theDate = '';
tempHistory.who = '';
tempHistory.userId = String.valueOf(historyLine.get('CreatedById'));
}
if(null!=historyLine.get('CreatedDate'))
prevDate = Datetime.valueOf(historyLine.get('CreatedDate')).format();
// Get the field label
String fieldLabel = GenericHistoryComponentController.returnFieldLabel(String.valueOf(historyLine.get('Field')));
// Set the Action value
if (String.valueOf(historyLine.get('Field')) == 'created') { // on Creation
tempHistory.action = 'Created.';
}
else if (historyLine.get('oldValue') != null && historyLine.get('newValue') == null){ // when deleting a value from a field
// Format the Date and if there's an error, catch it and re
try {
tempHistory.action = 'Deleted ' + Date.valueOf(historyLine.get('oldValue')).format() + ' in <b>' + fieldLabel + '</b>.';
} catch (Exception e){
tempHistory.action = 'Deleted ' + String.valueOf(historyLine.get('oldValue')) + ' in <b>' + fieldLabel + '</b>.';
}
}
else{ // all other scenarios
String fromText = '';
if (historyLine.get('oldValue') != null || Test.isRunningTest()) {
try {
fromText = ' from ' + Date.valueOf(historyLine.get('oldValue')).format();
} catch (Exception e) {
fromText = ' from ' + String.valueOf(historyLine.get('oldValue'));
}
}
String toText = '';
if (historyLine.get('newValue') != null|| Test.isRunningTest()) {
try {
toText = Date.valueOf(historyLine.get('newValue')).format();
} catch (Exception e) {
toText = String.valueOf(historyLine.get('newValue'));
}
}
if (toText != ''){
system.debug('###tempHistory###' +tempHistory);
tempHistory.action = 'Changed <b>' + fieldLabel + '</b>' + fromText + ' to <b>' + toText + '</b>.';
}
else {
tempHistory.action = 'Changed <b>' + fieldLabel;
}
}
// Add to the list
objectHistory.add(tempHistory);
}
}
public class objectHistoryLine {
public String theDate {get; set;}
public String who {get; set;}
public Id userId {get; set;}
public String action {get; set;}
}