Updated README.md for Utils #127

Signed-off-by: manick02 <manickavasagam.sundaram@gmail.com>

Author: manick02

README.md

@@ -141,7 +141,7 @@ states:
   end: true
 ```
 
-To parse it and create a Workflow intance you can do:
+To parse it and create a Workflow instance you can do:
 
 ``` java
 Workflow workflow = Workflow.fromSource(source);
@@ -288,5 +288,43 @@ Here are some generated diagrams from the specification examples (with legend en
 
 2. [Send CloudEvent on Workflow completion Example](https://github.com/serverlessworkflow/specification/blob/master/examples/examples.md#send-cloudevent-on-workfow-completion-example)
 <p align="center">
-<img src="img/provisionorders.png" alt="Send Cloud Event on Workflow complation"/>
+<img src="img/provisionorders.png" alt="Send Cloud Event on Workflow completion"/>
 </p>
+
+#### Using Workflow Utils
+Workflow utility allows you to interpret the Serverless Workflow Model.
+Once you have a `Workflow` instance, you can use it
+##### Get Starting State
+```Java
+State startingState = WorkflowUtils.getStartingState(workflow);
+```
+##### Get States by State Type
+```Java
+    List<State> states = WorkflowUtils.getStates(workflow, DefaultState.Type.EVENT);
+```
+##### Get Consumed-Events, Produced-Events and their count
+```Java
+ List<EventDefinition> consumedEvents = WorkflowUtils.getWorkflowConsumedEvents(workflow);
+ int consumedEventsCount = WorkflowUtils.getWorkflowConsumedEventsCount(workflow);
+
+ List<EventDefinition> producedEvents = WorkflowUtils.getWorkflowProducedEvents(workflow);
+ int producedEventsCount = WorkflowUtils.getWorkflowProducedEventsCount(workflow);
+ ```
+##### Get Defined Consumed-Events, Defined Produced-Events and their count
+```Java
+ List<EventDefinition> consumedEvents = WorkflowUtils.getWorkflowConsumedEventsCount(workflow);
+ int consumedEventsCount = WorkflowUtils.getWorkflowConsumedEventsCount(workflow);
+
+ List<EventDefinition> producedEvents = WorkflowUtils.getWorkflowProducedEvents(workflow);
+ int producedEventsCount = WorkflowUtils.getWorkflowProducedEventsCount(workflow);
+ ```
+##### Get Function definitions which is used by an action
+```Java
+FunctionDefinition finalizeApplicationFunctionDefinition =
+        WorkflowUtils.getFunctionDefinitionsForAction(workflow, "finalizeApplicationAction");
+```
+##### Get Actions which uses a Function definition
+```Java
+ List<Action> actionsForFunctionDefinition =
+        WorkflowUtils.getActionsForFunctionDefinition(workflow, functionRefName);
+```

utils/src/test/java/io/serverlessworkflow/util/EventsTest.java

@@ -29,7 +29,7 @@
 public class EventsTest {
   @ParameterizedTest
   @ValueSource(strings = {"/events/workflowwithevents.yml"})
-  public void testGetDefinedConsumedEvents(String workflowEvents) {
+  public void testGetConsumedEvents(String workflowEvents) {
     int expectedEventsCount = 2;
     Collection<String> expectedConsumedEvent =
         Arrays.asList("SATScoresReceived", "RecommendationLetterReceived");
@@ -44,7 +44,7 @@ public void testGetDefinedConsumedEvents(String workflowEvents) {
 
   @ParameterizedTest
   @ValueSource(strings = {"/events/workflowwithevents.yml"})
-  public void testGetDefinedConsumedEventsCount(String workflowEvents) {
+  public void testGetConsumedEventsCount(String workflowEvents) {
     int expectedEventsCount = 2;
     Workflow workflow = TestUtils.createWorkflowFromTestResource(workflowEvents);
     int workflowConsumedEventsCount = WorkflowUtils.getWorkflowConsumedEventsCount(workflow);