io.micronaut.jackson.serialize.ResourceSerializerModifier Maven / Gradle / Ivy
/*
* Copyright 2017-2018 original 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 io.micronaut.jackson.serialize;
import com.fasterxml.jackson.databind.BeanDescription;
import com.fasterxml.jackson.databind.SerializationConfig;
import com.fasterxml.jackson.databind.ser.BeanPropertyWriter;
import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
import com.fasterxml.jackson.databind.util.NameTransformer;
import io.micronaut.core.annotation.Internal;
import io.micronaut.http.hateos.Resource;
import javax.inject.Singleton;
import java.util.Iterator;
import java.util.List;
/**
* Modifies serialization for {@link Resource}.
*
* @author Graeme Rocher
* @since 1.0
*/
@Internal
@Singleton
class ResourceSerializerModifier extends BeanSerializerModifier {
@Override
public List changeProperties(SerializationConfig config, BeanDescription beanDesc, List beanProperties) {
if (Resource.class.isAssignableFrom(beanDesc.getBeanClass())) {
Iterator i = beanProperties.iterator();
BeanPropertyWriter links = null;
BeanPropertyWriter embedded = null;
while (i.hasNext()) {
BeanPropertyWriter writer = i.next();
String name = writer.getName();
if (name.equals("links")) {
i.remove();
links = writer;
}
if (name.equals("embedded")) {
i.remove();
embedded = writer;
}
}
if (embedded != null) {
embedded = embedded.rename(new NameTransformer() {
@Override
public String transform(String name) {
return Resource.EMBEDDED;
}
@Override
public String reverse(String transformed) {
return transformed;
}
});
beanProperties.add(0, embedded);
}
if (links != null) {
links = links.rename(new NameTransformer() {
@Override
public String transform(String name) {
return Resource.LINKS;
}
@Override
public String reverse(String transformed) {
return transformed;
}
});
beanProperties.add(0, links);
}
return beanProperties;
} else {
return super.changeProperties(config, beanDesc, beanProperties);
}
}
}