AndroidUnderscoreNamingStrategy.java

/*
 * Copyright 2016 Jacek Marchwicki <jacek.marchwicki@gmail.com>
 *
 * 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 com.appunite.gson;

import com.google.gson.FieldNamingStrategy;

import java.lang.reflect.Field;

public class AndroidUnderscoreNamingStrategy implements FieldNamingStrategy {

    @Override
    public String translateName(Field field) {
        final String name = field.getName();
        StringBuilder translation = new StringBuilder();
        int i = 0;
        if (name.length() >= 2) {
            if ('m' == name.charAt(0) && Character.isUpperCase(name.charAt(1))) {
                i++;
            }
        }
        for (; i < name.length(); i++) {
            char character = name.charAt(i);
            if (Character.isUpperCase(character) && translation.length() != 0) {
                translation.append("_");
            }
            translation.append(character);
        }
        return translation.toString().toLowerCase();
    }
}