tooling/spi-annotations/src/main/java/org/apache/camel/spi/Metadata.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.camel.spi;

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;

/**
 * Meta data for EIPs, components, data formats and other Camel concepts
 * <p/>
 * For example to associate labels to Camel components
 */
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD})
public @interface Metadata {

    /**
     * To define one or more labels.
     * <p/>
     * Multiple labels can be defined as a comma separated value.
     */
    String label() default "";

    /**
     * To define a default value.
     */
    String defaultValue() default "";

    /**
     * To define that this entity is required.
     */
    String required() default "";

    /**
     * An optional human readable title of this entity, to be used instead of a computed title.
     */
    String title() default "";

}