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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.so.aaisimulator.utils;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Waqas Ikram (waqas.ikram@est.tech)
*
*/
public class ShallowBeanCopy {
private static final Logger LOGGER = LoggerFactory.getLogger(ShallowBeanCopy.class);
private ShallowBeanCopy() {}
public static void copy(final Object from, final Object to) throws Exception {
final Map<String, Method> fromMethods = getMethods(from);
final Map<String, Method> toMethods = getMethods(to);
for (final Entry<String, Method> entry : fromMethods.entrySet()) {
final String methodName = entry.getKey();
final Method fromMethod = entry.getValue();
final Optional<Method> optional = getSetMethod(to, fromMethod);
if (optional.isPresent()) {
final Method toGetMethod = toMethods.get(methodName);
final Method toMethod = optional.get();
final Object toValue = fromMethod.invoke(from);
final Object fromValue = toGetMethod.invoke(to);
if (toValue != null && !toValue.equals(fromValue)) {
LOGGER.info("Changing {} value from: {} to: {}", methodName, fromValue, toValue);
toMethod.invoke(to, toValue);
}
}
}
}
private static Optional<Method> getSetMethod(final Object to, final Method fromMethod) {
final String name = fromMethod.getName().replaceFirst("get|is", "set");
final Class<?> returnType = fromMethod.getReturnType();
try {
return Optional.of(to.getClass().getMethod(name, returnType));
} catch (final NoSuchMethodException noSuchMethodException) {
}
return Optional.empty();
}
private static Map<String, Method> getMethods(final Object object) {
final Map<String, Method> methodsFound = new HashMap<>();
final Method[] methods = object.getClass().getMethods();
for (final Method method : methods) {
if (method.getName().startsWith("get") || method.getName().startsWith("is")) {
final String name = method.getName().replaceFirst("get|is", "");
methodsFound.put(name, method);
}
}
return methodsFound;
}
}
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