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package org.checkerframework.common.reflection.qual;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.checkerframework.framework.qual.SubtypeOf;

/**
 * This represents a set of {@link java.lang.reflect.Method Method} or {@link
 * java.lang.reflect.Constructor Constructor} values. If an expression's type has
 * {@code @MethodVal}, then the expression's run-time value is one of those values.
 *
 * Each of {@code @MethodVal}'s argument lists must be of equal length, and { className[i],
 * methodName[i], params[i] } represents one of the {@code Method} or {@code Constructor} values in
 * the set.
 *
 * @checker_framework.manual #methodval-and-classval-checkers MethodVal Checker
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
@SubtypeOf({UnknownMethod.class})
public @interface MethodVal {
    /**
     * The binary
     * name of the class that declares this method.
     */
    String[] className();

    /**
     * The name of the method that this Method object represents. Use {@code } for
     * constructors.
     */
    String[] methodName();

    /** The number of parameters to the method. */
    int[] params();
}