org.springframework.social.google.api.impl.ApiEnumSerializer Maven / Gradle / Ivy
/**
* Copyright 2011-2017 the original author or 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 org.springframework.social.google.api.impl;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
/**
* Jackson {@link JsonSerializer} that converts an enum name to camel case
* string.
*
* @author Gabriel Axel
*/
public class ApiEnumSerializer extends JsonSerializer> {
/**
* Convert an enumeration to a String representation.
*/
public static String enumToString(final Enum value) {
if (value == null) {
return null;
}
final String underscored = value.name();
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < underscored.length(); i++) {
final char c = underscored.charAt(i);
if (c == '_') {
sb.append(Character.toUpperCase(underscored.charAt(++i)));
} else {
sb.append(Character.toLowerCase(c));
}
}
return sb.toString();
}
@Override
public void serialize(final Enum value, final JsonGenerator jgen,
final SerializerProvider provider) throws IOException {
jgen.writeString(enumToString(value));
}
}