Copying and pasting StepLocatorStepFactoryBean from spring-batch-admin and adding a-probably-overkill unit test for it.

spring-batch-core/src/main/java/org/springframework/batch/core/step/StepLocatorStepFactoryBean.java

@@ -0,0 +1,61 @@
+package org.springframework.batch.core.step;
+
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.Step;
+import org.springframework.beans.factory.FactoryBean;
+
+/**
+ * Convenience factory for {@link Step} instances given a {@link StepLocator}.
+ * Most implementations of {@link Job} implement StepLocator, so that can be a
+ * good starting point.
+ * 
+ * @author Dave Syer
+ * 
+ */
+public class StepLocatorStepFactoryBean implements FactoryBean<Step> {
+
+	public StepLocator stepLocator;
+
+	public String stepName;
+
+	/**
+	 * @param stepLocator
+	 */
+	public void setStepLocator(StepLocator stepLocator) {
+		this.stepLocator = stepLocator;
+	}
+
+	/**
+	 * @param stepName
+	 */
+	public void setStepName(String stepName) {
+		this.stepName = stepName;
+	}
+
+	/**
+	 * 
+	 * @see FactoryBean#getObject()
+	 */
+	public Step getObject() throws Exception {
+		return stepLocator.getStep(stepName);
+	}
+
+	/**
+	 * Tell clients that we are a factory for {@link Step} instances.
+	 * 
+	 * @see FactoryBean#getObjectType()
+	 */
+	public Class<? extends Step> getObjectType() {
+		return Step.class;
+	}
+
+	/**
+	 * Always return true as optimization for bean factory.
+	 * 
+	 * @see FactoryBean#isSingleton()
+	 */
+	public boolean isSingleton() {
+		return true;
+	}
+
+}

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

@@ -0,0 +1,60 @@
+package org.springframework.batch.core.step;
+
+import org.junit.Test;
+import org.springframework.batch.core.JobInterruptedException;
+import org.springframework.batch.core.Step;
+import org.springframework.batch.core.StepExecution;
+import org.springframework.batch.core.job.SimpleJob;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for StepLocatorStepFactoryBean.
+ * 
+ * @author tvaughan
+ */
+public class StepLocatorStepFactoryBeanTests {
+    
+    @Test
+    public void testFoo() throws Exception {
+        Step testStep1 = buildTestStep("foo");
+        Step testStep2 = buildTestStep("bar");
+        Step testStep3 = buildTestStep("baz");
+        
+        SimpleJob simpleJob = new SimpleJob();   // is a StepLocator
+        simpleJob.addStep(testStep1);
+        simpleJob.addStep(testStep2);
+        simpleJob.addStep(testStep3);
+        
+        StepLocatorStepFactoryBean stepLocatorStepFactoryBean = new StepLocatorStepFactoryBean();
+        stepLocatorStepFactoryBean.setStepLocator(simpleJob);
+        stepLocatorStepFactoryBean.setStepName("bar");
+        assertEquals(testStep2, stepLocatorStepFactoryBean.getObject());
+    }
+    
+    private Step buildTestStep(final String stepName) {
+        return new Step() {
+            public String getName() {
+                return stepName;
+            }
+
+            public boolean isAllowStartIfComplete() {
+                throw new UnsupportedOperationException("Not supported yet.");
+            }
+
+            public int getStartLimit() {
+                throw new UnsupportedOperationException("Not supported yet.");
+            }
+
+            public void execute(StepExecution stepExecution) throws JobInterruptedException {
+                throw new UnsupportedOperationException("Not supported yet.");
+            }
+        };
+    }
+    
+    @Test
+    public void testGetObjectType() {
+        assertTrue((new StepLocatorStepFactoryBean()).getObjectType().isAssignableFrom(Step.class));
+    }
+}