promoted char sequence first

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@3261 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.core/src/main/java/org/springframework/core/convert/support/ObjectToStringConverter.java

@@ -43,9 +43,8 @@ final class ObjectToStringConverter implements ConditionalGenericConverter {
 
 	public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
 		Class<?> sourceClass = sourceType.getObjectType();
-		return String.class.equals(sourceClass) || Number.class.isAssignableFrom(sourceClass) || 
+		return CharSequence.class.isAssignableFrom(sourceClass) || Number.class.isAssignableFrom(sourceClass) || 
-				Boolean.class.equals(sourceClass) || Character.class.equals(sourceClass) ||
+				Boolean.class.equals(sourceClass) || Character.class.equals(sourceClass) || StringWriter.class.isAssignableFrom(sourceClass) ||
-				CharSequence.class.isAssignableFrom(sourceClass) || StringWriter.class.isAssignableFrom(sourceClass) ||
 				sourceClass.isEnum() || ObjectToObjectConverter.hasValueOfMethodOrConstructor(sourceClass, String.class);
 	}
 

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

@@ -19,6 +19,7 @@ package org.springframework.core.convert.support;
 import static junit.framework.Assert.assertEquals;
 import static junit.framework.Assert.assertNull;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 
 import java.math.BigDecimal;
@@ -218,6 +219,12 @@ public class DefaultConversionTests {
 		assertEquals(Locale.ENGLISH, conversionService.convert("en", Locale.class));
 	}
 
+	@Test
+	public void testStringToString() {
+		String str = "test";
+		assertSame(str, conversionService.convert(str, String.class));
+	}
+	
 	@Test
 	public void testNumberToNumber() {
 		assertEquals(Long.valueOf(1), conversionService.convert(Integer.valueOf(1), Long.class));