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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.implementation.spring.elements.tie;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* A hacking utility to copy beans field by field between two class loaders
*/
public class SpringElementTie {
public static <T> T copy(Object source, Class<T> cls, Type genericType) {
if (source == null) {
return null;
}
if (cls.isPrimitive()) {
return (T)source;
}
if (Collection.class.isAssignableFrom(cls)) {
ParameterizedType pType = (ParameterizedType)genericType;
Type itemType = pType.getActualTypeArguments()[0];
Collection col = (Collection)source;
List target = new ArrayList();
for (Object item : col) {
target.add(copy(item, (Class<?>)itemType, itemType));
}
return (T)target;
}
if (cls.isInstance(source)) {
return cls.cast(source);
}
try {
Class<?> sourceClass = source.getClass();
T target = cls.newInstance();
for (Field sourceField : sourceClass.getDeclaredFields()) {
sourceField.setAccessible(true);
Field targetField = cls.getDeclaredField(sourceField.getName());
targetField.setAccessible(true);
Object sourceFieldValue = sourceField.get(source);
Object targetFieldValue = copy(sourceFieldValue, targetField.getType(), targetField.getGenericType());
targetField.set(target, targetFieldValue);
}
return target;
} catch (Throwable e) {
throw new IllegalArgumentException(e);
}
}
}
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