generic converter revising

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@1947 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.context/src/main/java/org/springframework/ui/format/support/FormattingConversionServiceAdapter.java

@@ -76,10 +76,6 @@ public class FormattingConversionServiceAdapter extends GenericConversionService
 			this.formatter = formatter;
 		}
 
-		public boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) {
-			throw new UnsupportedOperationException("Should not be called");
-		}
-		
 		public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
 			try {
 				return this.formatter.parse((String) source, LocaleContextHolder.getLocale());

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

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import java.lang.reflect.Array;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+class ArrayToArrayGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public ArrayToArrayGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		if (sourceType.isAssignableTo(targetType)) {
+			return source;
+		}
+		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
+		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
+		Object target = Array.newInstance(targetElementType.getType(), Array.getLength(source));
+		GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
+		for (int i = 0; i < Array.getLength(target); i++) {
+			Array.set(target, i, converter.convert(Array.get(source, i), sourceElementType, targetElementType));
+		}
+		return target;
+	}
+
+}

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

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import java.lang.reflect.Array;
+import java.util.Collection;
+
+import org.springframework.core.CollectionFactory;
+import org.springframework.core.convert.TypeDescriptor;
+
+class ArrayToCollectionGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public ArrayToCollectionGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		int length = Array.getLength(source);
+		Collection collection = CollectionFactory.createCollection(targetType.getType(), length);
+		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
+		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
+		if (targetElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetElementType)) {
+			for (int i = 0; i < length; i++) {
+				collection.add(Array.get(source, i));
+			}
+		} else {
+			GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
+			for (int i = 0; i < length; i++) {
+				collection.add(converter.convert(Array.get(source, i), sourceElementType, targetElementType));
+			}
+		}
+		return collection;
+	}
+
+}

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

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+class ArrayToObjectGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public ArrayToObjectGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		throw new UnsupportedOperationException("Not yet implemented");
+	}
+
+}

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

@@ -1,197 +0,0 @@
-/*
- * Copyright 2002-2009 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.core.convert.support;
-
-import java.lang.reflect.Array;
-import java.util.Collection;
-import java.util.Iterator;
-
-import org.springframework.core.CollectionFactory;
-import org.springframework.core.convert.TypeDescriptor;
-
-class CollectionGenericConverter implements GenericConverter {
-
-	private GenericConversionService conversionService;
-
-	public CollectionGenericConverter(GenericConversionService conversionService) {
-		this.conversionService = conversionService;
-	}
-
-	public boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isArray() || targetType.isArray() || sourceType.isCollection() || targetType.isCollection();	
-	}
-	
-	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		if (isArrayToArray(sourceType, targetType)) {
-			return convertArrayToArray(source, sourceType, targetType);
-		} else if (isArrayToCollection(sourceType, targetType)) {
-			return convertArrayToCollection(source, sourceType, targetType);
-		} else if (isCollectionToCollection(sourceType, targetType)) {
-			return convertCollectionToCollection(source, sourceType, targetType);
-		} else if (isCollectionToArray(sourceType, targetType)) {
-			return convertCollectionToArray(source, sourceType, targetType); 
-		} else if (isArrayToObject(sourceType, targetType)) {
-			return convertArrayToObject(source, sourceType, targetType);			
-		} else if (isObjectToArray(sourceType, targetType)) {
-			return convertObjectToArray(source, sourceType, targetType);
-		} else if (isCollectionToObject(sourceType, targetType))  {
-			return convertCollectionToObject(source, sourceType, targetType);
-		} else {
-			return convertObjectToCollection(source, sourceType, targetType);
-		}
-	}
-	
-	private boolean isArrayToArray(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isArray() && targetType.isArray();
-	}
-
-	private Object convertArrayToArray(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		if (sourceType.isAssignableTo(targetType)) {
-			return source;
-		}
-		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
-		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
-		Object target = Array.newInstance(targetElementType.getType(), Array.getLength(source));
-		GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
-		for (int i = 0; i < Array.getLength(target); i++) {
-			Array.set(target, i, converter.convert(Array.get(source, i), sourceElementType, targetElementType));
-		}
-		return target;		
-	}
-
-	private boolean isArrayToCollection(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isArray() && targetType.isCollection();
-	}
-
-	private Object convertArrayToCollection(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		int length = Array.getLength(source);
-		Collection collection = CollectionFactory.createCollection(targetType.getType(), length);
-		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
-		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
-		if (targetElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetElementType)) {
-			for (int i = 0; i < length; i++) {
-				collection.add(Array.get(source, i));
-			}
-		} else {
-			GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
-			for (int i = 0; i < length; i++) {
-				collection.add(converter.convert(Array.get(source, i), sourceElementType, targetElementType));
-			}
-		}
-		return collection;
-	}
-
-	private boolean isCollectionToArray(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isCollection() && targetType.isArray();
-	}
-
-	private Object convertCollectionToArray(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		Collection sourceCollection = (Collection) source;
-		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
-		if (sourceElementType == TypeDescriptor.NULL) {
-			sourceElementType = getElementType(sourceCollection);
-		}
-		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
-		Object array = Array.newInstance(targetElementType.getType(), sourceCollection.size());
-		int i = 0;		
-		if (sourceElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetElementType)) {
-			for (Iterator it = sourceCollection.iterator(); it.hasNext(); i++) {
-				Array.set(array, i, it.next());
-			}
-		} else {
-			GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
-			for (Iterator it = sourceCollection.iterator(); it.hasNext(); i++) {
-				Array.set(array, i, converter.convert(it.next(), sourceElementType, targetElementType));
-			}
-		}
-		return array;
-	}
-	
-	private boolean isCollectionToCollection(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isCollection() && targetType.isCollection();
-	}
-
-	public Object convertCollectionToCollection(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		Collection sourceCollection = (Collection) source;
-		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
-		if (sourceElementType == TypeDescriptor.NULL) {
-			sourceElementType = getElementType(sourceCollection);
-		}
-		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
-		if (sourceElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetElementType)) {
-			if (sourceType.isAssignableTo(targetType)) {
-				return sourceCollection;
-			} else {
-				Collection targetCollection = CollectionFactory.createCollection(targetType.getType(), sourceCollection.size());
-				targetCollection.addAll(sourceCollection);
-				return targetCollection;
-			}
-		}
-		Collection targetCollection = CollectionFactory.createCollection(targetType.getType(), sourceCollection.size());
-		GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
-		for (Object element : sourceCollection) {
-			targetCollection.add(converter.convert(element, sourceElementType, targetElementType));
-		}
-		return targetCollection;
-	}
-	
-	private TypeDescriptor getElementType(Collection collection) {
-		for (Object element : collection) {
-			if (element != null) {
-				return TypeDescriptor.valueOf(element.getClass());
-			}
-		}
-		return TypeDescriptor.NULL;
-	}
-
-	private boolean isArrayToObject(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isArray();
-	}
-
-	private Object convertArrayToObject(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		throw new UnsupportedOperationException("Not yet implemented");
-	}
-
-	private boolean isObjectToArray(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return targetType.isArray();
-	}
-
-	private Object convertObjectToArray(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
-		Object array = Array.newInstance(targetType.getElementType(), 1);
-		if (sourceType.isAssignableTo(targetElementType)) {
-			Array.set(array, 0, source);			
-		} else {
-			GenericConverter converter = conversionService.getConverter(sourceType, targetElementType);
-			Array.set(array, 0, converter.convert(source, sourceType, targetElementType));
-		}
-		return array;
-	}
-	
-	private boolean isCollectionToObject(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isCollection();
-	}
-
-	private Object convertCollectionToObject(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		throw new UnsupportedOperationException("Not yet implemented");
-	}
-
-	private Object convertObjectToCollection(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
-		throw new UnsupportedOperationException("Not yet implemented");
-	}
-
-}

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

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import java.lang.reflect.Array;
+import java.util.Collection;
+import java.util.Iterator;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+class CollectionToArrayGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public CollectionToArrayGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		Collection sourceCollection = (Collection) source;
+		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
+		if (sourceElementType == TypeDescriptor.NULL) {
+			sourceElementType = getElementType(sourceCollection);
+		}
+		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
+		Object array = Array.newInstance(targetElementType.getType(), sourceCollection.size());
+		int i = 0;		
+		if (sourceElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetElementType)) {
+			for (Iterator it = sourceCollection.iterator(); it.hasNext(); i++) {
+				Array.set(array, i, it.next());
+			}
+		} else {
+			GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
+			for (Iterator it = sourceCollection.iterator(); it.hasNext(); i++) {
+				Array.set(array, i, converter.convert(it.next(), sourceElementType, targetElementType));
+			}
+		}
+		return array;
+	}
+	
+	private TypeDescriptor getElementType(Collection collection) {
+		for (Object element : collection) {
+			if (element != null) {
+				return TypeDescriptor.valueOf(element.getClass());
+			}
+		}
+		return TypeDescriptor.NULL;
+	}
+
+}

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

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import java.util.Collection;
+
+import org.springframework.core.CollectionFactory;
+import org.springframework.core.convert.TypeDescriptor;
+
+class CollectionToCollectionGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public CollectionToCollectionGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		Collection sourceCollection = (Collection) source;
+		TypeDescriptor sourceElementType = sourceType.getElementTypeDescriptor();
+		if (sourceElementType == TypeDescriptor.NULL) {
+			sourceElementType = getElementType(sourceCollection);
+		}
+		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
+		if (sourceElementType == TypeDescriptor.NULL || sourceElementType.isAssignableTo(targetElementType)) {
+			if (sourceType.isAssignableTo(targetType)) {
+				return sourceCollection;
+			} else {
+				Collection targetCollection = CollectionFactory.createCollection(targetType.getType(), sourceCollection.size());
+				targetCollection.addAll(sourceCollection);
+				return targetCollection;
+			}
+		}
+		Collection targetCollection = CollectionFactory.createCollection(targetType.getType(), sourceCollection.size());
+		GenericConverter converter = conversionService.getConverter(sourceElementType, targetElementType);
+		for (Object element : sourceCollection) {
+			targetCollection.add(converter.convert(element, sourceElementType, targetElementType));
+		}
+		return targetCollection;
+	}
+	
+	private TypeDescriptor getElementType(Collection collection) {
+		for (Object element : collection) {
+			if (element != null) {
+				return TypeDescriptor.valueOf(element.getClass());
+			}
+		}
+		return TypeDescriptor.NULL;
+	}
+
+}

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

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+class CollectionToObjectGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public CollectionToObjectGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		throw new UnsupportedOperationException("Not yet implemented");
+	}
+
+}

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

@@ -16,13 +16,14 @@
 
 package org.springframework.core.convert.support;
 
+import java.lang.reflect.Array;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 import java.lang.reflect.TypeVariable;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.LinkedHashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
@@ -38,6 +39,7 @@ import org.springframework.core.convert.converter.ConverterFactory;
 import org.springframework.core.convert.converter.ConverterInfo;
 import org.springframework.core.convert.converter.ConverterRegistry;
 import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
 
 /**
  * Base implementation of a conversion service.
@@ -55,8 +57,6 @@ public class GenericConversionService implements ConversionService, ConverterReg
 
 	private final Map<Class, Map<Class, GenericConverter>> sourceTypeConverters = new HashMap<Class, Map<Class, GenericConverter>>();
 
-	private final Set<GenericConverter> matchableConverters = new LinkedHashSet<GenericConverter>();
-
 	public GenericConversionService() {
 		initGenericConverters();
 	}
@@ -182,24 +182,23 @@ public class GenericConversionService implements ConversionService, ConverterReg
 	// subclassing hooks
 
 	protected void initGenericConverters() {
-		addGenericConverter(new CollectionGenericConverter(this));
-		addGenericConverter(new MapGenericConverter(this));
+		addGenericConverter(Object[].class, Object[].class, new ArrayToArrayGenericConverter(this));
+		addGenericConverter(Object[].class, Collection.class, new ArrayToCollectionGenericConverter(this));
+		addGenericConverter(Object[].class, Object.class, new ArrayToObjectGenericConverter(this));
+		addGenericConverter(Collection.class, Collection.class, new CollectionToCollectionGenericConverter(this));
+		addGenericConverter(Collection.class, Object[].class, new CollectionToArrayGenericConverter(this));
+		addGenericConverter(Collection.class, Object.class, new CollectionToObjectGenericConverter(this));
+		addGenericConverter(Map.class, Map.class, new MapToMapGenericConverter(this));
+		addGenericConverter(Object.class, Object[].class, new ObjectToArrayGenericConverter(this));
+		addGenericConverter(Object.class, Collection.class, new ObjectToCollectionGenericConverter(this));
 	}
 
-	protected void addGenericConverter(GenericConverter converter) {
-		this.matchableConverters.add(converter);
+	protected void addGenericConverter(Class<?> sourceType, Class<?> targetType, GenericConverter converter) {
+		getSourceMap(sourceType).put(targetType, converter);
 	}
 
 	protected GenericConverter getConverter(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		GenericConverter converter = matchConverterByClassPair(sourceType.getObjectType(), targetType.getObjectType());
-		if (converter == null) {
-			for (GenericConverter matchableConverter : this.matchableConverters) {
-				if (matchableConverter.canConvert(sourceType, targetType)) {
-					return matchableConverter;
-				}
-			}
-		}
-		return converter;
+		return findConverterByClassPair(sourceType.getObjectType(), targetType.getObjectType());
 	}
 
 	// internal helpers
@@ -255,7 +254,7 @@ public class GenericConversionService implements ConversionService, ConverterReg
 		return null;
 	}
 
-	private GenericConverter matchConverterByClassPair(Class sourceType, Class targetType) {
+	private GenericConverter findConverterByClassPair(Class sourceType, Class targetType) {
 		if (sourceType.isInterface()) {
 			LinkedList<Class> classQueue = new LinkedList<Class>();
 			classQueue.addFirst(sourceType);
@@ -283,8 +282,15 @@ public class GenericConversionService implements ConversionService, ConverterReg
 				if (converter != null) {
 					return converter;
 				}
-				if (currentClass.getSuperclass() != null) {
-					classQueue.addFirst(currentClass.getSuperclass());
+				if (currentClass.isArray()) {
+					Class componentType = ClassUtils.resolvePrimitiveIfNecessary(currentClass.getComponentType());
+					if (componentType.getSuperclass() != null) {
+						classQueue.addFirst(Array.newInstance(componentType.getSuperclass(), 0).getClass());
+					}
+				} else {
+					if (currentClass.getSuperclass() != null) {
+						classQueue.addFirst(currentClass.getSuperclass());
+					}
 				}
 				Class[] interfaces = currentClass.getInterfaces();
 				for (Class ifc : interfaces) {
@@ -337,8 +343,15 @@ public class GenericConversionService implements ConversionService, ConverterReg
 				if (converter != null) {
 					return converter;
 				}
-				if (currentClass.getSuperclass() != null) {
-					classQueue.addFirst(currentClass.getSuperclass());
+				if (currentClass.isArray()) {
+					Class componentType = ClassUtils.resolvePrimitiveIfNecessary(currentClass.getComponentType());
+					if (componentType.getSuperclass() != null) {
+						classQueue.addFirst(Array.newInstance(componentType.getSuperclass(), 0).getClass());
+					}
+				} else {
+					if (currentClass.getSuperclass() != null) {
+						classQueue.addFirst(currentClass.getSuperclass());
+					}
 				}
 				Class[] interfaces = currentClass.getInterfaces();
 				for (Class ifc : interfaces) {
@@ -357,10 +370,6 @@ public class GenericConversionService implements ConversionService, ConverterReg
 			this.converter = converter;
 		}
 
-		public boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) {
-			throw new UnsupportedOperationException("Should not be called");
-		}
-
 		public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
 			return converter.convert(source);
 		}
@@ -375,10 +384,6 @@ public class GenericConversionService implements ConversionService, ConverterReg
 			this.converterFactory = converterFactory;
 		}
 
-		public boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) {
-			throw new UnsupportedOperationException("Should not be called");
-		}
-
 		public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
 			return converterFactory.getConverter(targetType.getObjectType()).convert(source);
 		}

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

@@ -31,14 +31,6 @@ import org.springframework.core.convert.converter.ConverterFactory;
  */
 public interface GenericConverter {
 
-	/**
-	 * Can this converter convert the sourceType to targetType.
-	 * @param sourceType context about the sourceType to convert to
-	 * @param targetType context about the targetType to convert to
-	 * @return true if so, false otherwise
-	 */
-	boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType);
-	
 	/**
 	 * Convert the source to the targetType described by the TypeDescriptor.
 	 * @param source the source object to convert (never null)

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

@@ -5,18 +5,14 @@ import java.util.Map;
 import org.springframework.core.CollectionFactory;
 import org.springframework.core.convert.TypeDescriptor;
 
-class MapGenericConverter implements GenericConverter {
+class MapToMapGenericConverter implements GenericConverter {
 
 	private GenericConversionService conversionService;
 
-	public MapGenericConverter(GenericConversionService conversionService) {
+	public MapToMapGenericConverter(GenericConversionService conversionService) {
 		this.conversionService = conversionService;
 	}
 
-	public boolean canConvert(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return sourceType.isMap() && targetType.isMap();
-	}
-
 	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
 		Map sourceMap = (Map) source;
 		TypeDescriptor targetKeyType = targetType.getMapKeyTypeDescriptor();

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

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import java.lang.reflect.Array;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+class ObjectToArrayGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public ObjectToArrayGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		TypeDescriptor targetElementType = targetType.getElementTypeDescriptor();
+		Object array = Array.newInstance(targetType.getElementType(), 1);
+		if (sourceType.isAssignableTo(targetElementType)) {
+			Array.set(array, 0, source);			
+		} else {
+			GenericConverter converter = conversionService.getConverter(sourceType, targetElementType);
+			Array.set(array, 0, converter.convert(source, sourceType, targetElementType));
+		}
+		return array;
+	}
+
+}

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

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2002-2009 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.core.convert.support;
+
+import org.springframework.core.convert.TypeDescriptor;
+
+class ObjectToCollectionGenericConverter implements GenericConverter {
+
+	private GenericConversionService conversionService;
+
+	public ObjectToCollectionGenericConverter(GenericConversionService conversionService) {
+		this.conversionService = conversionService;
+	}
+	
+	public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+		throw new UnsupportedOperationException("Not yet implemented");
+	}
+
+}