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/*
 * Copyright 2010 Proofpoint, 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.proofpoint.event.client;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import static com.google.common.base.CaseFormat.LOWER_CAMEL;
import static com.google.common.base.CaseFormat.UPPER_UNDERSCORE;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface EventField
{
    String value() default "";
    EventFieldMapping fieldMapping() default EventFieldMapping.DATA;

    enum EventFieldMapping
    {
        DATA,
        HOST,
        TIMESTAMP,
        TRACE_TOKEN,
        UUID;

        public String getFieldName()
        {
            return UPPER_UNDERSCORE.to(LOWER_CAMEL, name());
        }
    }
}