polish

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@957 50f2f4bb-b051-0410-bef5-90022cba6387

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

@@ -50,17 +50,15 @@ class CollectionToArray extends AbstractCollectionConverter {
 		int i = 0;
 		ConversionExecutor elementConverter = getElementConverter(collection);
 		for (Iterator<?> it = collection.iterator(); it.hasNext(); i++) {
-			Object value = it.next();
-			value = elementConverter.execute(value);
-			Array.set(array, i, value);
+			Array.set(array, i, elementConverter.execute(it.next()));
 		}
 		return array;
 	}
 	
-	private ConversionExecutor getElementConverter(Collection<?> target) {
+	private ConversionExecutor getElementConverter(Collection<?> source) {
 		ConversionExecutor elementConverter = getElementConverter();
-		if (elementConverter == NoOpConversionExecutor.INSTANCE && !target.isEmpty()) {
-			Iterator<?> it = target.iterator();
+		if (elementConverter == NoOpConversionExecutor.INSTANCE && !source.isEmpty()) {
+			Iterator<?> it = source.iterator();
 			while (it.hasNext()) {
 				Object value = it.next();
 				if (value != null) {

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

@@ -37,26 +37,29 @@ class CollectionToCollection extends AbstractCollectionConverter {
 	@SuppressWarnings("unchecked")
 	protected Object doExecute(Object source) throws Exception {
 		Collection sourceCollection = (Collection) source;
-		Class targetCollectionType = getTargetCollectionType();
-		Class implClass = CollectionConversionUtils.getImpl(targetCollectionType);
+		Class implClass = CollectionConversionUtils.getImpl(getTargetCollectionType());
 		Collection targetCollection = (Collection) implClass.newInstance();
-		ConversionExecutor elementConverter = getElementConverter();
-		Class elementType;
-		if (elementConverter == null) {
-			elementType = getTargetElementType();
-		} else {
-			elementType = null;
-		}
+		ConversionExecutor elementConverter = getElementConverter(sourceCollection);
 		Iterator it = sourceCollection.iterator();
 		while (it.hasNext()) {
-			Object value = it.next();
-			if (elementConverter == null && elementType != null) {
-				elementConverter = getConversionService().getConversionExecutor(value.getClass(), TypeDescriptor.valueOf(elementType)); 			
-			}
-			value = elementConverter.execute(value);
-			targetCollection.add(value);
+			targetCollection.add(elementConverter.execute(it.next()));
 		}
 		return targetCollection;
 	}
 	
+	private ConversionExecutor getElementConverter(Collection<?> source) {
+		ConversionExecutor elementConverter = getElementConverter();
+		if (elementConverter == NoOpConversionExecutor.INSTANCE && !source.isEmpty() && getTargetElementType() != null) {
+			Iterator<?> it = source.iterator();
+			while (it.hasNext()) {
+				Object value = it.next();
+				if (value != null) {
+					elementConverter = getConversionService().getConversionExecutor(value.getClass(), TypeDescriptor.valueOf(getTargetElementType()));
+					break;
+				}
+			}
+		}
+		return elementConverter;
+	}
+	
 }

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

@@ -0,0 +1,79 @@
+package org.springframework.core.convert.service;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.junit.Test;
+import org.springframework.core.convert.TypeDescriptor;
+
+public class CollectionToCollectionTests {
+
+	@Test
+	public void testCollectionToCollectionConversion() throws Exception {
+		DefaultConversionService service = new DefaultConversionService();
+		CollectionToCollection c = new CollectionToCollection(new TypeDescriptor(getClass().getField("bindTarget")),
+				new TypeDescriptor(getClass().getField("integerTarget")), service);
+		bindTarget.add("1");
+		bindTarget.add("2");
+		bindTarget.add("3");
+		List result = (List) c.execute(bindTarget);
+		assertEquals(new Integer(1), result.get(0));
+		assertEquals(new Integer(2), result.get(1));
+		assertEquals(new Integer(3), result.get(2));
+	}
+
+	@Test
+	public void testCollectionToCollectionConversionNoGenericInfo() throws Exception {
+		DefaultConversionService service = new DefaultConversionService();
+		CollectionToCollection c = new CollectionToCollection(TypeDescriptor.valueOf(Collection.class),
+				TypeDescriptor.valueOf(List.class), service);
+		bindTarget.add("1");
+		bindTarget.add("2");
+		bindTarget.add("3");
+		List result = (List) c.execute(bindTarget);
+		assertEquals("1", result.get(0));
+		assertEquals("2", result.get(1));
+		assertEquals("3", result.get(2));
+	}
+	
+	@Test
+	public void testCollectionToCollectionConversionNoGenericInfoSource() throws Exception {
+		DefaultConversionService service = new DefaultConversionService();
+		CollectionToCollection c = new CollectionToCollection(TypeDescriptor.valueOf(Collection.class),
+				new TypeDescriptor(getClass().getField("integerTarget")), service);
+		bindTarget.add("1");
+		bindTarget.add("2");
+		bindTarget.add("3");
+		List result = (List) c.execute(bindTarget);
+		assertEquals(new Integer(1), result.get(0));
+		assertEquals(new Integer(2), result.get(1));
+		assertEquals(new Integer(3), result.get(2));
+	}
+	
+	@Test
+	public void testCollectionToCollectionConversionNoGenericInfoSourceNullValues() throws Exception {
+		DefaultConversionService service = new DefaultConversionService();
+		CollectionToCollection c = new CollectionToCollection(TypeDescriptor.valueOf(Collection.class),
+				new TypeDescriptor(getClass().getField("integerTarget")), service);
+		bindTarget.add(null);
+		bindTarget.add("1");
+		bindTarget.add("2");
+		bindTarget.add(null);
+		bindTarget.add("3");
+		List result = (List) c.execute(bindTarget);
+		assertEquals(null, result.get(0));
+		assertEquals(new Integer(1), result.get(1));
+		assertEquals(new Integer(2), result.get(2));
+		assertEquals(null, result.get(3));
+		assertEquals(new Integer(3), result.get(4));
+	}
+
+
+	public Collection<String> bindTarget = new ArrayList<String>();
+	public List<Integer> integerTarget = new ArrayList<Integer>();
+
+
+}