/*
* Copyright 2016 Open mHealth
*
* 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.data.mapping.model;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.springframework.data.mapping.PersistentProperty;
/**
* A composite field naming strategy that uses a Jackson {@link JsonProperty} annotation value if present,
* or delegates to a backing strategy otherwise.
*
* @author Emerson Farrugia
*/
public class JsonPropertyPreservingFieldNamingStrategy implements FieldNamingStrategy {
private FieldNamingStrategy backingStrategy;
/**
* @param backingStrategy the field naming strategy to use if the {@link JsonProperty} annotation isn't present
*/
public JsonPropertyPreservingFieldNamingStrategy(FieldNamingStrategy backingStrategy) {
if (backingStrategy == null) {
throw new NullPointerException("A backing strategy hasn't been specified.");
}
this.backingStrategy = backingStrategy;
}
@Override
public String getFieldName(PersistentProperty<?> property) {
JsonProperty jsonPropertyAnnotation = property.findAnnotation(JsonProperty.class);
if (jsonPropertyAnnotation != null) {
return jsonPropertyAnnotation.value();
}
else {
return backingStrategy.getFieldName(property);
}
}
}
