polish

org.springframework.core/src/main/java/org/springframework/core/convert/service/CollectionToArray.java

@@ -57,7 +57,7 @@ class CollectionToArray extends AbstractCollectionConverter {
 	
 	private ConversionExecutor getElementConverter(Collection<?> source) {
 		ConversionExecutor elementConverter = getElementConverter();
-		if (elementConverter == NoOpConversionExecutor.INSTANCE && !source.isEmpty()) {
+		if (elementConverter == NoOpConversionExecutor.INSTANCE) {
 			Iterator<?> it = source.iterator();
 			while (it.hasNext()) {
 				Object value = it.next();

org.springframework.core/src/main/java/org/springframework/core/convert/service/CollectionToCollection.java

@@ -49,7 +49,7 @@ class CollectionToCollection extends AbstractCollectionConverter {
 	
 	private ConversionExecutor getElementConverter(Collection<?> source) {
 		ConversionExecutor elementConverter = getElementConverter();
-		if (elementConverter == NoOpConversionExecutor.INSTANCE && !source.isEmpty() && getTargetElementType() != null) {
+		if (elementConverter == NoOpConversionExecutor.INSTANCE && getTargetElementType() != null) {
 			Iterator<?> it = source.iterator();
 			while (it.hasNext()) {
 				Object value = it.next();

org.springframework.core/src/test/java/org/springframework/core/convert/service/CollectionToCollectionTests.java

@@ -1,6 +1,7 @@
 package org.springframework.core.convert.service;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -70,6 +71,15 @@ public class CollectionToCollectionTests {
 		assertEquals(null, result.get(3));
 		assertEquals(new Integer(3), result.get(4));
 	}
+	
+	@Test
+	public void testCollectionToCollectionConversionNoGenericInfoSourceEmpty() throws Exception {
+		DefaultConversionService service = new DefaultConversionService();
+		CollectionToCollection c = new CollectionToCollection(TypeDescriptor.valueOf(Collection.class),
+				new TypeDescriptor(getClass().getField("integerTarget")), service);
+		List result = (List) c.execute(bindTarget);
+		assertTrue(result.isEmpty());
+	}
 
 
 	public Collection<String> bindTarget = new ArrayList<String>();