fixed type assignability check for wildcarded Map (SPR-6676)

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@2806 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.core/src/main/java/org/springframework/core/convert/TypeDescriptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -456,7 +456,7 @@ public class TypeDescriptor {
 
 	private boolean isTypeAssignableTo(Class<?> clazz) {
 		Class<?> type = getType();
-		return (type != null && ClassUtils.isAssignable(clazz, type));
+		return (type != null && (clazz == null || ClassUtils.isAssignable(clazz, type)));
 	}
 
 

org.springframework.core/src/test/java/org/springframework/core/convert/support/GenericConversionServiceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 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.
@@ -18,6 +18,7 @@ package org.springframework.core.convert.support;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -164,7 +165,7 @@ public class GenericConversionServiceTests {
 	}
 
 	@Test
-	public void testMapToObjectConversionBug() {
+	public void testMapToObjectConversion() {
 		GenericConversionService conversionService = new GenericConversionService();
 		Map<Object, Object> raw = new HashMap<Object, Object>();
 		raw.put("key", "value");
@@ -181,6 +182,16 @@ public class GenericConversionServiceTests {
 		assertEquals("RESULT", converted);
 	}
 
+	@Test
+	public void testWildcardMap() throws Exception {
+		GenericConversionService conversionService = ConversionServiceFactory.createDefaultConversionService();
+		Map<String, String> input = new LinkedHashMap<String, String>();
+		input.put("key", "value");
+		Object converted = conversionService.convert(input, TypeDescriptor.forObject(input),
+				new TypeDescriptor(getClass().getField("wildcardMap")));
+		assertSame(input, converted);
+	}
+
 
 	private interface MyBaseInterface {
 
@@ -197,7 +208,7 @@ public class GenericConversionServiceTests {
 	}
 
 
-	private class MyBaseInterfaceConverter implements Converter<MyBaseInterface, String> {
+	private static class MyBaseInterfaceConverter implements Converter<MyBaseInterface, String> {
 
 		public String convert(MyBaseInterface source) {
 			return "RESULT";
@@ -205,4 +216,6 @@ public class GenericConversionServiceTests {
 	}
 
 
+	public static Map<String, ?> wildcardMap;
+
 }