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Utility classes for Jetty

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//
// ========================================================================
// Copyright (c) 1995-2021 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//

package org.eclipse.jetty.util.annotation;

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;

/**
 * The @ManagedAttribute annotation is used to indicate that a given method
 * exposes a JMX attribute. This annotation is placed always on the reader
 * method of a given attribute. Unless it is marked as read-only in the
 * configuration of the annotation a corresponding setter is looked for
 * following normal naming conventions. For example if this annotation is
 * on a method called getFoo() then a method called setFoo() would be looked
 * for and if found wired automatically into the jmx attribute.
 */
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Target({ElementType.METHOD})
public @interface ManagedAttribute
{
    /**
     * Description of the Managed Attribute
     *
     * @return value
     */
    String value() default "Not Specified";

    /**
     * name to use for the attribute
     *
     * @return the name of the attribute
     */
    String name() default "";

    /**
     * Is the managed field read-only?
     *
     * Required only when a setter exists but should not be exposed via JMX
     *
     * @return true if readonly
     */
    boolean readonly() default false;

    /**
     * Does the managed field exist on a proxy object?
     *
     * @return true if a proxy object is involved
     */
    boolean proxied() default false;

    /**
     * If is a field references a setter that doesn't conform to standards for discovery
     * it can be set here.
     *
     * @return the full name of the setter in question
     */
    String setter() default "";
}