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Eclipse Yasson. Reference implementation of JSR-367 (JSON-B).

There is a newer version: 3.0.4

/*
 * Copyright (c) 2016, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

package org.eclipse.yasson.internal.model;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.util.HashMap;
import java.util.Map;

import jakarta.json.bind.JsonbException;

import org.eclipse.yasson.internal.properties.MessageKeys;
import org.eclipse.yasson.internal.properties.Messages;

/**
 * Annotation holder for classes, superclasses, interfaces, fields, getters and setters.
 *
 * @param  annotated element
 */
public class JsonbAnnotatedElement {

    private final Map, Annotation> annotations = new HashMap<>(4);

    private final T element;

    /**
     * Creates a new instance.
     *
     * @param element Element.
     */
    public JsonbAnnotatedElement(T element) {
        for (Annotation ann : element.getAnnotations()) {
            annotations.put(ann.annotationType(), ann);
        }

        this.element = element;
    }

    /**
     * Gets element.
     *
     * @return Element.
     */
    public T getElement() {
        return element;
    }

    /**
     * Get an annotation by type.
     * @param  Type of annotation
     * @param annotationClass Type of annotation
     * @return Annotation by passed type
     */
    public  AT getAnnotation(Class annotationClass) {
        return annotationClass.cast(annotations.get(annotationClass));
    }

    public Annotation[] getAnnotations() {
        return annotations.values().toArray(new Annotation[0]);
    }

    /**
     * Adds annotation.
     *
     * @param annotation Annotation to add.
     */
    public void putAnnotation(Annotation annotation) {
        if (annotations.containsKey(annotation.annotationType())) {
            throw new JsonbException(Messages.getMessage(MessageKeys.INTERNAL_ERROR,
                                                         "Annotation already present: " + annotation));
        }
        annotations.put(annotation.annotationType(), annotation);
    }
}