/*
* 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.deltaspike.core.api.config.view.metadata;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* Marks view-metadata annotations or their fields as aggregated metadata. That results in retention of multiple
* instances of such annotation per view instead of the metadata getting overriden by lower levels.
*
* Core just provides this annotation, but the concrete behaviour is defined by a concrete ConfigNodeConverter. E.g.
* DefaultConfigNodeConverter uses the result stored in
* {@link org.apache.deltaspike.core.spi.config.view.ViewConfigNode#getInheritedMetaData} to replace default- (/ null-)
* values of "higher" levels with custom values of "lower" levels, if #value is 'true'.
*/
//TODO re-visit and discuss method-level (for annotation-attributes)
@Target({ ANNOTATION_TYPE })
@Retention(RUNTIME)
@Documented
public @interface Aggregated
{
/**
* @return false to override the same metadata type of the parent view-config, and true to allow multiple instances
* of a metadata per view
*/
boolean value();
}