From 6c55a09554c878a49c2137e9bfe9d464f6916cee Mon Sep 17 00:00:00 2001
From: dsyer <dsyer@2e8e966d-6415-0410-94b9-dc4e65435d03>
Date: Tue, 12 May 2009 10:42:23 +0000
Subject: [PATCH] RESOLVED - issue BATCH-1238: Add ItemProcessorAdapter similar
 to Item*Adapter

---
 .../item/adapter/ItemProcessorAdapter.java    | 38 +++++++++++++++++++
 .../adapter/ItemProcessorAdapterTests.java    | 30 +++++++++++++++
 .../batch/item/sample/FooService.java         |  5 +++
 .../adapter/delegating-item-processor.xml     | 12 ++++++
 4 files changed, 85 insertions(+)
 create mode 100644 spring-batch-infrastructure/src/main/java/org/springframework/batch/item/adapter/ItemProcessorAdapter.java
 create mode 100644 spring-batch-infrastructure/src/test/java/org/springframework/batch/item/adapter/ItemProcessorAdapterTests.java
 create mode 100644 spring-batch-infrastructure/src/test/resources/org/springframework/batch/item/adapter/delegating-item-processor.xml

diff --git a/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/adapter/ItemProcessorAdapter.java b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/adapter/ItemProcessorAdapter.java
new file mode 100644
index 000000000..aa58f456e
--- /dev/null
+++ b/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/adapter/ItemProcessorAdapter.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2006-2007 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.batch.item.adapter;
+
+import org.springframework.batch.item.ItemProcessor;
+
+/**
+ * Invokes a custom method on a delegate plain old Java object which itself
+ * processes an item.
+ * 
+ * @author Dave Syer
+ */
+public class ItemProcessorAdapter<I,O> extends AbstractMethodInvokingDelegator<O> implements ItemProcessor<I,O> {
+
+	/**
+	 * Invoke the delegate method and return the result.
+	 * 
+	 * @see ItemProcessor#process(Object)
+	 */
+	public O process(I item) throws Exception {
+		return invokeDelegateMethodWithArgument(item);
+	}
+
+}
diff --git a/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/adapter/ItemProcessorAdapterTests.java b/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/adapter/ItemProcessorAdapterTests.java
new file mode 100644
index 000000000..be3379c22
--- /dev/null
+++ b/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/adapter/ItemProcessorAdapterTests.java
@@ -0,0 +1,30 @@
+package org.springframework.batch.item.adapter;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.batch.item.sample.Foo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * Tests for {@link ItemProcessorAdapter}.
+ * 
+ * @author Dave Syer
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(locations = "delegating-item-processor.xml")
+public class ItemProcessorAdapterTests {
+
+	@Autowired
+	private ItemProcessorAdapter<Foo,String> processor;
+
+	@Test
+	public void testProcess() throws Exception {
+		Foo item = new Foo(0,"foo",1);
+		assertEquals("foo", processor.process(item));
+	}
+
+}
diff --git a/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/sample/FooService.java b/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/sample/FooService.java
index 2b616a788..dd357aec1 100644
--- a/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/sample/FooService.java
+++ b/spring-batch-infrastructure/src/test/java/org/springframework/batch/item/sample/FooService.java
@@ -33,6 +33,11 @@ public class FooService {
 		processedFoos.add(foo);
 	}
 	
+	public String extractName(Foo foo) {
+		processedFoos.add(foo);
+		return foo.getName();
+	}
+	
 	public void processNameValuePair(String name, int value) {
 		processedFooNameValuePairs.add(new Foo(0, name, value));
 	}
diff --git a/spring-batch-infrastructure/src/test/resources/org/springframework/batch/item/adapter/delegating-item-processor.xml b/spring-batch-infrastructure/src/test/resources/org/springframework/batch/item/adapter/delegating-item-processor.xml
new file mode 100644
index 000000000..8a9a14a1a
--- /dev/null
+++ b/spring-batch-infrastructure/src/test/resources/org/springframework/batch/item/adapter/delegating-item-processor.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
+
+	<bean id="processor" class="org.springframework.batch.item.adapter.ItemProcessorAdapter">
+		<property name="targetObject" ref="fooService" />
+		<property name="targetMethod" value="extractName" />
+	</bean>
+	
+	<bean id="fooService" class="org.springframework.batch.item.sample.FooService" />
+
+</beans>
\ No newline at end of file