ThriftEnumMetadataBuilder.java

/*
 * Copyright (C) 2012 Facebook, Inc.
 *
 * 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.facebook.swift.codec.metadata;

import com.facebook.swift.codec.ThriftEnum;

import javax.annotation.concurrent.NotThreadSafe;

@NotThreadSafe
public class ThriftEnumMetadataBuilder<T extends Enum<T>>
{
    private final Class<T> enumClass;
    private final String enumName;

    public ThriftEnumMetadataBuilder(Class<T> enumClass)
    {
        this.enumClass = enumClass;
        this.enumName = extractEnumName(enumClass);
    }

    public ThriftEnumMetadata<T> build()
    {
        return new ThriftEnumMetadata<>(enumName, enumClass);
    }

    private String extractEnumName(Class<T> enumClass)
    {
        ThriftEnum annotation = enumClass.getAnnotation(ThriftEnum.class);
        if (annotation == null) {
            return enumClass.getSimpleName();
        }
        else if (!annotation.value().isEmpty()) {
            return annotation.value();
        }
        else {
            return enumClass.getSimpleName();
        }
    }
}