io.micronaut.jackson.bind.CharSequencePropertyNamingStrategyConverter Maven / Gradle / Ivy
/*
* Copyright 2017-2019 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.bind;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import io.micronaut.core.convert.ConversionContext;
import io.micronaut.core.convert.TypeConverter;
import io.micronaut.core.naming.NameUtils;
import io.micronaut.core.util.StringUtils;
import javax.inject.Singleton;
import java.util.Optional;
/**
* Type converter used to convert a CharSequence to a {@link PropertyNamingStrategy} instance.
*
* @author msanssouci
* @since 1.1.0
*/
@Singleton
public class CharSequencePropertyNamingStrategyConverter implements TypeConverter {
@Override
public Optional convert(CharSequence charSequence, Class targetType, ConversionContext context) {
PropertyNamingStrategy propertyNamingStrategy = null;
if (charSequence != null) {
String stringValue = NameUtils.environmentName(charSequence.toString());
if (StringUtils.isNotEmpty(stringValue)) {
switch (stringValue) {
case "SNAKE_CASE":
propertyNamingStrategy = PropertyNamingStrategy.SNAKE_CASE;
break;
case "UPPER_CAMEL_CASE":
propertyNamingStrategy = PropertyNamingStrategy.UPPER_CAMEL_CASE;
break;
case "LOWER_CASE":
propertyNamingStrategy = PropertyNamingStrategy.LOWER_CASE;
break;
case "KEBAB_CASE":
propertyNamingStrategy = PropertyNamingStrategy.KEBAB_CASE;
break;
case "LOWER_CAMEL_CASE":
propertyNamingStrategy = PropertyNamingStrategy.LOWER_CAMEL_CASE;
break;
default:
break;
}
}
}
if (propertyNamingStrategy == null) {
context.reject(charSequence, new IllegalArgumentException(String.format("Unable to convert '%s' to a com.fasterxml.jackson.databind.PropertyNamingStrategy", charSequence)));
}
return Optional.ofNullable(propertyNamingStrategy);
}
}