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/*
 * Copyright (C) 2014 Simon Vig Therkildsen
 *
 * 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 net.simonvt.schematic.annotation;

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

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.RetentionPolicy.CLASS;

/**
 * Adds the PRIMARY KEY keyword to a database column.
 * In case of multiple primary keys, a PRIMARY KEY table constraint is added.
 */
@Retention(CLASS) @Target(FIELD)
public @interface PrimaryKey {
  /**
   * Defines conflict resolution algorithm. Will be ignored if there are multiple PrimaryKey
   * annotations
   */
  ConflictResolutionType onConflict() default ConflictResolutionType.NONE;
}