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/*
* JBoss, Home of Professional Open Source
* Copyright 2012, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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 javax.validation.groups;

import javax.validation.Valid;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Converts group {@code from} to group {@code to} during cascading.
 * 
 * Can be used everywhere {@link Valid} is used and must be on an element
 * annotated with {@code Valid}.
 *
 * @author Emmanuel Bernard
 * @since 1.1
 */
@Target({ TYPE, METHOD, FIELD, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
public @interface ConvertGroup {

	Class from();

	Class to();

	/**
	 * Defines several {@link ConvertGroup} annotations
	 * on the same element.
	 */
	@Target({ TYPE, METHOD, FIELD, CONSTRUCTOR, PARAMETER })
	@Retention(RUNTIME)
	@Documented
	public @interface List {

		ConvertGroup[] value();
	}
}