Fix for ACT-1372 (User Task with form: form will be not displayed if the value...

Fix for ACT-1372 (User Task with form: form will be not displayed if the value expression in next line used)

modules/activiti-engine/src/main/java/org/activiti/engine/impl/el/ExpressionManager.java

@@ -70,7 +70,7 @@ public class ExpressionManager {
  
   
   public Expression createExpression(String expression) {
-    ValueExpression valueExpression = expressionFactory.createValueExpression(parsingElContext, expression, Object.class);
+    ValueExpression valueExpression = expressionFactory.createValueExpression(parsingElContext, expression.trim(), Object.class);
     return new JuelExpression(valueExpression, expression);
   }
 

modules/activiti-engine/src/test/java/org/activiti/engine/test/bpmn/usertask/InitiatorTest.java

@@ -33,4 +33,18 @@ public class InitiatorTest extends PluggableActivitiTestCase {
     
     assertEquals(1, taskService.createTaskQuery().taskAssignee("bono").count());
   }
+  
+  // See ACT-1372
+  @Deployment
+  public void testInitiatorWithWhiteSpaceInExpression() {
+    try {
+      identityService.setAuthenticatedUserId("bono");
+      runtimeService.startProcessInstanceByKey("InitiatorProcess");
+    } finally {
+      identityService.setAuthenticatedUserId(null);
+    }
+    
+    assertEquals(1, taskService.createTaskQuery().taskAssignee("bono").count());
+  }
+  
 }

modules/activiti-engine/src/test/resources/org/activiti/engine/test/bpmn/usertask/InitiatorTest.testInitiatorWithWhiteSpaceInExpression.bpmn20.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<definitions id="taskAssigneeExample"
+	xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn"
+	targetNamespace="Examples">
+
+	<process id="InitiatorProcess">
+
+		<startEvent id="start" activiti:initiator="initiator" />
+
+		<sequenceFlow id="flow1" sourceRef="start" targetRef="theTask" />
+
+		<userTask id="theTask" name="my task">
+			<humanPerformer id="humanPerformer111">
+				<resourceAssignmentExpression id="humanPerformer_assignmentExpression">
+					<formalExpression id="humanPerformer_formalExpressions">
+					${initiator}</formalExpression>
+				</resourceAssignmentExpression>
+			</humanPerformer>
+		</userTask>
+
+		<sequenceFlow id="flow2" sourceRef="theTask" targetRef="theEnd" />
+
+		<endEvent id="theEnd" />
+
+	</process>
+
+</definitions>
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