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Ashish Dixit 2 i want handler class for my trigger code
Hi All,
i am new in apex code, I write a trigger and dont have idea about the handler class so i directly write logic in trigger itself. it would be great if anybody let me know how to write handler class and call below trigger code.
trigger PMO_Trigger on PMO__c (before insert,before update,after Insert){
public static Set<Id> existingOppIds=new Set<Id>();
public List<PMO__c> fmiList = new List<PMO__c>();
if(Trigger.isBefore && Trigger.isInsert){
/*********************Implement different access to the different users**************/
PMO_ModuleSecurity.UpdateAccess(trigger.new);
/**********************Limit the creation of PMO Module to only 1 module per opportunity******/
existingOppIds = PMO_ModuleSecurity.CheckNoOfPMOModule(trigger.new);
if(existingOppIds.size()>0){
for(Integer i = 0; i < Trigger.new.size(); i++){
if(existingOppIds.contains(Trigger.new[i].JJ_Opportunity__c)){
//check for existing opportunity
Trigger.new[i].addError('Another PMO module already exists for this opportunity. Only 1 PMO module is allowed per opportunity.');
}
else{
// existingOppIds.add( Trigger.new[i].opportunity__c);
}
}
}
}
/******************************* Grant PMOModule Access ******************************/
if( Trigger.isInsert && Trigger.isAfter){
new AccessManager().grantAccess(Trigger.new);
}
if(Trigger.isBefore && Trigger.isUpdate){
/**********************Limit the creation of PMO Module to only 1 module per opportunity******/
for(PMO__c fmi : Trigger.new){
PMO__c oldOpportunity = Trigger.oldMap.get(fmi.id);
if(fmi.JJ_Opportunity__c != oldOpportunity.JJ_Opportunity__c ){
fmiList.add(fmi);
}
}
if(fmiList.size()>0){
existingOppIds = PMO_ModuleSecurity.CheckNoOfPMOModule(trigger.new);
if(existingOppIds.size()>0){
for(Integer i = 0; i < Trigger.new.size(); i++){
if(existingOppIds.contains(Trigger.new[i].JJ_Opportunity__c)){
//check for existing opportunity
Trigger.new[i].addError('Another PMO module already exists for this opportunity. Only 1 PMO module is allowed per opportunity.');
}
else{
existingOppIds.add( Trigger.new[i].JJ_Opportunity__c);
}
}
}
}
}
}
i am new in apex code, I write a trigger and dont have idea about the handler class so i directly write logic in trigger itself. it would be great if anybody let me know how to write handler class and call below trigger code.
trigger PMO_Trigger on PMO__c (before insert,before update,after Insert){
public static Set<Id> existingOppIds=new Set<Id>();
public List<PMO__c> fmiList = new List<PMO__c>();
if(Trigger.isBefore && Trigger.isInsert){
/*********************Implement different access to the different users**************/
PMO_ModuleSecurity.UpdateAccess(trigger.new);
/**********************Limit the creation of PMO Module to only 1 module per opportunity******/
existingOppIds = PMO_ModuleSecurity.CheckNoOfPMOModule(trigger.new);
if(existingOppIds.size()>0){
for(Integer i = 0; i < Trigger.new.size(); i++){
if(existingOppIds.contains(Trigger.new[i].JJ_Opportunity__c)){
//check for existing opportunity
Trigger.new[i].addError('Another PMO module already exists for this opportunity. Only 1 PMO module is allowed per opportunity.');
}
else{
// existingOppIds.add( Trigger.new[i].opportunity__c);
}
}
}
}
/******************************* Grant PMOModule Access ******************************/
if( Trigger.isInsert && Trigger.isAfter){
new AccessManager().grantAccess(Trigger.new);
}
if(Trigger.isBefore && Trigger.isUpdate){
/**********************Limit the creation of PMO Module to only 1 module per opportunity******/
for(PMO__c fmi : Trigger.new){
PMO__c oldOpportunity = Trigger.oldMap.get(fmi.id);
if(fmi.JJ_Opportunity__c != oldOpportunity.JJ_Opportunity__c ){
fmiList.add(fmi);
}
}
if(fmiList.size()>0){
existingOppIds = PMO_ModuleSecurity.CheckNoOfPMOModule(trigger.new);
if(existingOppIds.size()>0){
for(Integer i = 0; i < Trigger.new.size(); i++){
if(existingOppIds.contains(Trigger.new[i].JJ_Opportunity__c)){
//check for existing opportunity
Trigger.new[i].addError('Another PMO module already exists for this opportunity. Only 1 PMO module is allowed per opportunity.');
}
else{
existingOppIds.add( Trigger.new[i].JJ_Opportunity__c);
}
}
}
}
}
}
1.First create a helper class for your trigger.Trigger Helper class is the class which does all the processing for trigger.
public class TriggerHandler
{
public void OnBeforeInsert(list<PMO__c> triggerNew,map<Id,PMO__c> triggerNewmap)
{
// This is used to Call before Insert method.
}
public void OnAfterInsert(list<PMO__c> triggerNew,map<Id,PMO__c> triggerNewmap)
{
// This is used to Call afterInsert method
}
public void OnBeforeUpdate(list<PMO__c> triggerNew,map<Id,PMO__c> triggerNewmap,list<PMO__c> triggerOld,map<Id,PMO__c> triggerOldmap)
{
// This is used to Call before update method.
}
}
2.Update your trigger,so that Trigger will contain only the helper class method calls ,rest of the processing is done in helper class.
trigger PMO_Trigger on PMO__c (before insert,before update,after Insert)
{
//Declaration of object ‘objHandler’.
TriggerHandler objHandler = new TriggerHandler();
if(trigger.isAfter && trigger.isInsert)
{
objHandler.OnAfterInsert(trigger.New, trigger.newMap);
}
if(trigger.isBefore && trigger.isInsert)
{
objHandler.OnBeforeInsert(trigger.New, trigger.newMap);
}
if(trigger.isBefore && trigger.isUpdate)
{
objHandler.OnBeforeUpdate(trigger.New, trigger.newMap,trigger.Old,trigger.oldMap);
}
}
Hope this will help..
refer:http://blog.mirketa.com/salesforce-developer-guide-use-of-helperhandler-class-to-manage-trigger-execution/