BATCH-711:Modified ItemWriter interface to use parameterized types. Updated a portion of classes using ItemWriter as well.

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/ItemWriter.java

@@ -35,7 +35,7 @@ package org.springframework.batch.item;
  * @author Dave Syer
  * @author Lucas Ward
  */
-public interface ItemWriter {
+public interface ItemWriter<T> {
 
 	/**
 	 * Process the supplied data element. Will be called multiple times during a
@@ -46,7 +46,7 @@ public interface ItemWriter {
 	 * retry or a batch the framework will catch the exception and convert or
 	 * rethrow it as appropriate.
 	 */
-	void write(Object item) throws Exception;
+	void write(T item) throws Exception;
 
 	/**
 	 * Flush any buffers that are being held. This will usually be performed

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/adapter/ItemWriterAdapter.java

@@ -29,9 +29,9 @@ import org.springframework.batch.item.ItemWriter;
  * 
  * @author Robert Kasanicky
  */
-public class ItemWriterAdapter extends AbstractMethodInvokingDelegator<Object> implements ItemWriter {
+public class ItemWriterAdapter<T> extends AbstractMethodInvokingDelegator<T> implements ItemWriter<T> {
 	
-    public void write(Object item) throws Exception {
+    public void write(T item) throws Exception {
     	invokeDelegateMethodWithArgument(item);
     }
 

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/adapter/PropertyExtractingDelegatingItemWriter.java

@@ -31,7 +31,7 @@ import org.springframework.util.Assert;
  * 
  * @author Robert Kasanicky
  */
-public class PropertyExtractingDelegatingItemWriter extends AbstractMethodInvokingDelegator<Object> implements ItemWriter {
+public class PropertyExtractingDelegatingItemWriter<T> extends AbstractMethodInvokingDelegator<T> implements ItemWriter<T> {
 	
 	private String[] fieldsUsedAsTargetMethodArguments;
 	
@@ -39,7 +39,7 @@ public class PropertyExtractingDelegatingItemWriter extends AbstractMethodInvoki
 	 * Extracts values from item's fields named in fieldsUsedAsTargetMethodArguments
 	 * and passes them as arguments to the delegate method.
 	 */
-	public void write(Object item) throws Exception {
+	public void write(T item) throws Exception {
 		// helper for extracting property values from a bean
 		BeanWrapper beanWrapper = new BeanWrapperImpl(item);
 		

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/HibernateCursorItemReader.java

@@ -51,7 +51,7 @@ import org.springframework.util.ClassUtils;
  * @author Robert Kasanicky
  * @author Dave Syer
  */
-public class HibernateCursorItemReader extends AbstractBufferedItemReaderItemStream implements ItemStream,
+public class HibernateCursorItemReader<T> extends AbstractBufferedItemReaderItemStream<T> implements ItemStream,
 		InitializingBean {
 
 	private SessionFactory sessionFactory;
@@ -150,7 +150,8 @@ public class HibernateCursorItemReader extends AbstractBufferedItemReaderItemStr
 		this.fetchSize = fetchSize;
 	}
 
-	protected Object doRead() throws Exception {
+	@SuppressWarnings("unchecked")
+	protected T doRead() throws Exception {
 		if (cursor.next()) {
 			Object[] data = cursor.get();
 			Object item;
@@ -162,7 +163,7 @@ public class HibernateCursorItemReader extends AbstractBufferedItemReaderItemStr
 				item = data[0];
 			}
 
-			return item;
+			return (T)item;
 		}
 		return null;
 	}

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/support/AbstractItemStreamItemWriter.java

@@ -25,6 +25,6 @@ import org.springframework.batch.item.ItemWriter;
  * @author Dave Syer
  *
  */
-public abstract class AbstractItemStreamItemWriter extends ItemStreamSupport implements ItemWriter {
+public abstract class AbstractItemStreamItemWriter<T> extends ItemStreamSupport implements ItemWriter<T> {
 
 }

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/support/AbstractItemWriter.java

@@ -25,7 +25,7 @@ import org.springframework.batch.item.ItemWriter;
  * 
  * @author Lucas Ward
  */
-public abstract class AbstractItemWriter implements ItemWriter {
+public abstract class AbstractItemWriter<T> implements ItemWriter<T> {
 
 	public void flush() throws FlushFailedException {
 	}