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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdcrests.mapping;
/**
* Base class for all mapping classes. Mapping classes will perform data mapping from source object
* to target object Base class provides following<br> <ol> <li>provides life cycle of
* mapping class , first mapSimpleProperties is called and then mapComplexProperties is
* called.</li> <li>methods mapSimpleProperties and mapComplexProperties with default
* implementation, these should be overridden by concrete mapping classes for writing mapping
* logic.</li> </ol>
*
*
*/
public abstract class MappingBase<S, T> {
/**
* Method is called for starting mapping from source object to target object method sets context
* in the thread locale and than calls mapSimpleProperties and mapComplexProperties
* respectively.
*
* @param source : source object for mapping
* @param clazz : target <code>Class</code> for mapping
* @return <code>T</code> - instance of type <code>T</code>
*/
public final T applyMapping(final S source, Class<T> clazz) {
T target = (T) instantiateTarget(clazz);
if (source == null || target == null) {
//TODO: what what?
} else {
preMapping(source, target);
doMapping(source, target);
postMapping(source, target);
}
return target;
}
/**
* This method is called before the <code>doMapping</code> method.
*/
public void preMapping(final S source, T target) {
}
/**
* The actual method that does the mapping between the <code>source</code> to <code>target</code>
* objects. This method is being called automatically as part of the mapper class. This
* method must be override (it is abstract) by the mapper class.
*
* @param source - the source object.
* @param target - the target object.
*/
public abstract void doMapping(final S source, T target);
/**
* This method is called after the <code>doMapping</code> method.
*/
public void postMapping(final S source, T target) {
}
/**
* Creates the instance of the input class.
*
* @return <code>Object</code>
*/
private Object instantiateTarget(final Class<?> clazz) {
Object object = null;
try {
object = clazz.newInstance();
} catch (InstantiationException | IllegalAccessException exception) {
//TODO: what what?
}
return object;
}
}
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