Created a JSR-352 specific StepState to maintain in the Job's

ExecutionContext what the last step executed was.  This is needed for
restarts when the step to restart at is a DecisionStep.

spring-batch-core/src/test/java/org/springframework/batch/core/jsr/step/DecisionStepTests.java

@@ -1,6 +1,7 @@
 package org.springframework.batch.core.jsr.step;
 
 import static org.junit.Assert.assertEquals;
+import static org.springframework.batch.core.jsr.JsrTestUtils.restartJob;
 import static org.springframework.batch.core.jsr.JsrTestUtils.runJob;
 
 import java.util.List;
@@ -20,6 +21,7 @@ import org.springframework.beans.factory.access.BeanFactoryReference;
 import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.access.ContextSingletonBeanFactoryLocator;
+import org.springframework.util.Assert;
 
 public class DecisionStepTests {
 
@@ -101,6 +103,45 @@ public class DecisionStepTests {
 		assertEquals(2, StepExecutionCountingDecider.previousStepCount);
 	}
 
+	@Test
+	public void testDecisionRestart() throws Exception {
+		JobExecution execution = runJob("DecisionStepTests-restart-context", new Properties(), 10000l);
+		assertEquals(BatchStatus.STOPPED, execution.getBatchStatus());
+
+		List<StepExecution> stepExecutions = BatchRuntime.getJobOperator().getStepExecutions(execution.getExecutionId());
+		assertEquals(2, stepExecutions.size());
+
+		assertEquals("step1", stepExecutions.get(0).getStepName());
+		assertEquals("decision1", stepExecutions.get(1).getStepName());
+
+		JobExecution execution2 = restartJob(execution.getExecutionId(), new Properties(), 10000l);
+		assertEquals(BatchStatus.COMPLETED, execution2.getBatchStatus());
+
+		List<StepExecution> stepExecutions2 = BatchRuntime.getJobOperator().getStepExecutions(execution2.getExecutionId());
+		assertEquals(2, stepExecutions2.size());
+
+		assertEquals("decision1", stepExecutions2.get(0).getStepName());
+		assertEquals("step2", stepExecutions2.get(1).getStepName());
+	}
+
+	public static class RestartDecider implements Decider {
+
+		private static int runs = 0;
+
+		@Override
+		public String decide(StepExecution[] executions) throws Exception {
+			Assert.isTrue(executions.length == 1);
+			Assert.isTrue(executions[0].getStepName().equals("step1"));
+
+			if(runs == 0) {
+				runs++;
+				return "STOP_HERE";
+			} else {
+				return "CONTINUE";
+			}
+		}
+	}
+
 	public static class StepExecutionCountingDecider implements Decider {
 
 		static int previousStepCount = 0;