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TriggerX.cls
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TriggerX.cls
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/**
* TriggerX by Sebastian Wagner 2013
*
* Redistribution and use in source and binary forms, with or without modification, are permitted.
*
* Force.com Trigger API for advanced trigger execution
* http://github.com/sebwagner/TriggerX
*/
public virtual class TriggerX {
// for INSERT && UPDATE Trigger.new otherwise Trigger.old
public sObject[] records;
public TriggerX(){}
// used instead of constructor since handlers are instanciated with an emptry contructor
public virtual TriggerX doConstruct(sObject[] records){
this.records = records;
return this;
}
// Method executed to perform BEFORE_INSERT operations, overwrite if applicable
public virtual void onBeforeInsert(){}
// Method executed to perform AFTER_INSERT operations, overwrite if applicable
public virtual void onAfterInsert(){}
// Method executed to perform BEFORE_UPDATE operations, overwrite if applicable
public virtual void onBeforeUpdate(Map<Id,sObject> triggerOldMap){}
// Method executed to perform AFTER_UPDATE operations, overwrite if applicable
public virtual void onAfterUpdate(Map<Id,sObject> triggerOldMap){}
// Method executed to perform BEFORE_DELETE operations, overwrite if applicable
public virtual void onBeforeDelete(){}
// Method executed to perform AFTER_DELETE operations, overwrite if applicable
public virtual void onAfterDelete(){}
// Method executed to perform AFTER_UNDELETE operations, overwrite if applicable
public virtual void onAfterUndelete(){}
// returns a list that contains only records which ids are not returned by TriggerX.getUpdatedIds()
// for improved performance use contains() directly on the set of updated ids
//
// Set<Id> updatedIds = TriggerX.getUpdatedIds();
// for (Account record:(Account)records){
// if (!updatedIds.contains(record.Id))
// }
protected sObject[] getNonRecursiveUpdates(){
Set<Id> updatedIds = TriggerX.getUpdatedIds();
// make a copy of records
sObject[] tmp = records.clone();
tmp.clear();
// loop through records and make check if is tracked as updated
for (sObject record:records)
{
if (!updatedIds.contains((Id)record.get('Id')))
{
tmp.add(record);
}
}
return tmp;
}
//--------------------------------------------------------------
// Handling
//--------------------------------------------------------------
// instanciates the applicable Trigger Handler object and passes it with Trigger context to handleTrigger
public static void handleTrigger(Type handlerType){
handleTrigger(
(TriggerX)handlerType.newInstance()
, handlerType
, Trigger.isBefore
, Trigger.isInsert
, Trigger.IsUpdate
, Trigger.isDelete
, Trigger.isUndelete
, Trigger.new
, Trigger.oldMap);
}
// executes the required methods based on the triggers context
public static void handleTrigger(TriggerX handler, Type handlerType, Boolean isBefore, Boolean isInsert, Boolean isUpdate, Boolean isDelete, Boolean isUndelete, sObject[] triggerNew, Map<Id,sObject> triggerOldMap){
initControls(handlerType,false);
//TriggerX handler = handlerClass.newInstance();
Set<String> dsbld = getDisabledEvents(handlerType);
// BEFORE events
if (isBefore)
{
if (isInsert && !dsbld.contains(EventType.BEFORE_INSERT.name())) handler.doConstruct(triggerNew).onBeforeInsert();
else if (isUpdate && !dsbld.contains(EventType.BEFORE_UPDATE.name())) handler.doConstruct(triggerNew).onBeforeUpdate(triggerOldMap);
else if (isDelete && !dsbld.contains(EventType.BEFORE_DELETE.name())) handler.doConstruct(triggerOldMap.values()).onBeforeDelete();
}
// AFTER events
else
{
if (isInsert && !dsbld.contains(EventType.AFTER_INSERT.name())) handler.doConstruct(triggerNew).onAfterInsert();
else if (isUpdate && !dsbld.contains(EventType.AFTER_UPDATE.name())) handler.doConstruct(triggerNew).onAfterUpdate(triggerOldMap);
else if (isDelete && !dsbld.contains(EventType.AFTER_DELETE.name())) handler.doConstruct(triggerOldMap.values()).onAfterDelete();
else if (isUndelete && !dsbld.contains(EventType.AFTER_UNDELETE.name())) handler.doConstruct(triggerNew).onAfterUndelete();
}
}
//--------------------------------------------------------------
// Change Tracking
//--------------------------------------------------------------
// returns true if a value of one of the specified fields has changed
public static Boolean hasChangedFields(String[] fieldZ, sObject record, sObject recordOld){
for (String field:fieldZ)
{
if (record.get(field) != recordOld.get(field)) return true;
}
return false;
}
// returns true if a value of one of the specified fields has changed
public static Boolean hasChangedFields(sObjectField[] fieldZ, sObject record, sObject recordOld){
for (sObjectField field:fieldZ)
{
if (record.get(field) != recordOld.get(field)) return true;
}
return false;
}
// returns a list of changed fields based on provided fieldZ list
public static String[] getChangedFields(String[] fieldZ, sObject record, sObject recordOld){
String[] changes = new String[]{};
for (String field:fieldZ)
{
if (record.get(field) != recordOld.get(field)) changes.add(field);
}
return changes;
}
// returns a list of changed fields based on provided fieldZ list
public static sObjectField[] getChangedFields(sObjectField[] fieldZ, sObject record, sObject recordOld){
sObjectField[] changes = new sObjectField[]{};
for (sObjectField field:fieldZ)
{
if (record.get(field) != recordOld.get(field)) changes.add(field);
}
return changes;
}
//--------------------------------------------------------------
// EVENT Control
//--------------------------------------------------------------
// enum that represents all Trigger events
public enum EventType {
BEFORE_INSERT
, AFTER_INSERT
, BEFORE_UPDATE
, AFTER_UPDATE
, BEFORE_DELETE
, AFTER_DELETE
, AFTER_UNDELETE
}
// all disabled events by tyep
static Map<Type,Set<String>> disabledMap = new Map<Type,Set<String>>();
// keep track for which TriggerX instances initControls has been executed
static Set<Type> ctrlInits = new Set<Type>();
// keep track of the updated ids
static Set<Id> ctrlUpdatedIds = new Set<Id>();
// add set of ids to updatedIds
public static void addUpdatedIds(Set<Id> idSet){
ctrlUpdatedIds.addAll(idSet);
}
// return all updated ids
public static Set<Id> getUpdatedIds(){
return ctrlUpdatedIds;
}
// init disabled events from TRIGGER_CONTROL__c settings
public static void initControls(Type className, Boolean forceInit){
// only init the list for the given set
if (!ctrlInits.contains(className) || forceInit)
{
TRIGGER_CONTROL__c record = TRIGGER_CONTROL__c.getInstance(className.toString());
Set<String> events = getDisabledEvents(className);
if (record != null)
{
// reduce statements
events.addAll(
new Set<String>{
!record.AFTER_INSERT__c ? 'AFTER_INSERT' : null
, !record.AFTER_UPDATE__c ? 'AFTER_UPDATE' : null
, !record.AFTER_DELETE__c ? 'AFTER_DELETE' : null
, !record.AFTER_UNDELETE__c ? 'AFTER_UNDELETE' : null
, !record.BEFORE_INSERT__c ? 'BEFORE_INSERT' : null
, !record.BEFORE_UPDATE__c ? 'BEFORE_UPDATE' : null
, !record.BEFORE_DELETE__c ? 'BEFORE_DELETE' : null});
events.remove(null);
}
// remember that the given key has been index already
ctrlInits.add(className);
}
}
// returns set of disabled events
public static Set<String> getDisabledEvents(Type className){
if (!disabledMap.containsKey(className))
{
disabledMap.put(className,new Set<String>());
}
return disabledMap.get(className);
}
// returns true if the specified event is disabled
public static Boolean isDisabled(Type className, EventType event){
return getDisabledEvents(className).contains(event.name());
}
// all insert events
public static EventType[] getInsertEvents(){
return new EventType[]{
EventType.BEFORE_INSERT
, EventType.AFTER_INSERT};
}
// all update events
public static EventType[] getUpdateEvents(){
return new EventType[]{
EventType.BEFORE_UPDATE
, EventType.AFTER_UPDATE};
}
// all update events
public static EventType[] getDeleteEvents(){
return new EventType[]{
EventType.BEFORE_DELETE
, EventType.AFTER_DELETE};
}
// list of all BEFORE EventType enums
public static EventType[] getBeforeEvents(){
return new EventType[]{
EventType.BEFORE_INSERT
, EventType.BEFORE_UPDATE
, EventType.BEFORE_DELETE};
}
// list of all AFTER EventType enums
public static EventType[] getAfterEvents(){
return new EventType[]{
EventType.AFTER_INSERT
, EventType.AFTER_UPDATE
, EventType.AFTER_DELETE
, EventType.AFTER_UNDELETE};
}
// disables all events for the type
public static void disable(Type className){
EventType[] allEvents = new EventType[]{};
allEvents.addAll(getBeforeEvents());
allEvents.addAll(getAfterEvents());
disable(className,allEvents);//.addAll(toStringEvents(allEvents));
}
// removes all disabled events for the class
public static void enable(Type className){
getDisabledEvents(className).clear();
}
// disable all specificed events for the type
public static void disable(Type className, EventType[] events){
getDisabledEvents(className).addAll(toStringEvents(events));
}
// enable all specificed events for the type
public static void enable(Type className, EventType[] events){
getDisabledEvents(className).removeAll(toStringEvents(events));
}
// disable a single event
public static void disable(Type className, EventType event){
getDisabledEvents(className).add(event.name());
}
// enable a single event
public static void enable(Type className, EventType event){
getDisabledEvents(className).remove(event.name());
}
// converts a Set of Event enums into Strings
public static Set<String> toStringEvents(EventType[] events){
Set<String> output = new Set<String>();
for (EventType e:events)
{
output.add(e.name());
}
return output;
}
}