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/*
 * Copyright (C) 2012 The Project Lombok Authors.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package lombok.core;

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

/**
 * Used to order the way handlers are run. Handlers with a lower priority value are run before handlers with higher priority values.
 * For example, {@code @Value} can cause the class to be marked final, and this affects the behaviour of {@code @EqualsAndHashCode}. By ensuring that
 * the handler for {@code @Value} always runs before the handler for {@code @EqualsAndHashCode}, the code is simpler: The {@code @EqualsAndHashCode} handler
 * does not have to check for the presence of a {@code @Value} annotation to determine whether to generate the {@code canEqual} method or not.
 * 
 * A new priority level can also be used to force a reset of the resolved model, i.e. to add generated methods to the symbol tables. Each platform implementation (javac, ecj, etc)
 * may have additional marker annotations required to indicate the need for the reset.
 */
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface HandlerPriority {
	int value();
	
	/**
	 * This can be used to differentiate 2 handlers with the same value to be at a different handler priority anyway.
	 * DO NOT USE THIS unless someone has been crowding out the numbers and there's no room left.
	 */
	int subValue() default 0;
}