write method parameter type preferred over read method parameter type for property conversion (fixing regression; SPR-8964)

org.springframework.beans/src/test/java/org/springframework/beans/BeanWrapperEnumTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -16,11 +16,12 @@
 
 package org.springframework.beans;
 
-import static org.junit.Assert.*;
 import org.junit.Test;
 import test.beans.CustomEnum;
 import test.beans.GenericBean;
 
+import static org.junit.Assert.*;
+
 /**
  * @author Juergen Hoeller
  * @author Chris Beams
@@ -109,4 +110,14 @@ public final class BeanWrapperEnumTests {
 		assertTrue(gb.getCustomEnumSet().contains(CustomEnum.VALUE_2));
 	}
 
+	@Test
+	public void testCustomEnumSetWithGetterSetterMismatch() {
+		GenericBean<?> gb = new GenericBean<Object>();
+		BeanWrapper bw = new BeanWrapperImpl(gb);
+		bw.setPropertyValue("customEnumSetMismatch", new String[] {"VALUE_1", "VALUE_2"});
+		assertEquals(2, gb.getCustomEnumSet().size());
+		assertTrue(gb.getCustomEnumSet().contains(CustomEnum.VALUE_1));
+		assertTrue(gb.getCustomEnumSet().contains(CustomEnum.VALUE_2));
+	}
+
 }

org.springframework.beans/src/test/java/test/beans/GenericBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -21,6 +21,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -244,6 +245,17 @@ public class GenericBean<T> {
 		this.customEnumSet = customEnumSet;
 	}
 
+	public Set<CustomEnum> getCustomEnumSetMismatch() {
+		return customEnumSet;
+	}
+
+	public void setCustomEnumSetMismatch(Set<String> customEnumSet) {
+		this.customEnumSet = new HashSet<CustomEnum>(customEnumSet.size());
+		for (Iterator<String> iterator = customEnumSet.iterator(); iterator.hasNext(); ) {
+			this.customEnumSet.add(CustomEnum.valueOf(iterator.next()));
+		}
+	}
+
 	public static GenericBean createInstance(Set<Integer> integerSet) {
 		return new GenericBean(integerSet);
 	}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.core.convert;
 
 import java.lang.annotation.Annotation;
@@ -144,10 +145,7 @@ public final class Property {
 		if (read == null && write == null) {
 			throw new IllegalStateException("Property is neither readable nor writeable");
 		}
-		if (read != null && write != null && !write.getParameterType().isAssignableFrom(read.getParameterType())) {
-			throw new IllegalStateException("Write parameter is not assignable from read parameter");
-		}
-		return read != null ? read : write;
+		return (write != null ? write : read);
 	}
 	
 	private MethodParameter resolveReadMethodParameter() {