AnnotatedElementBase.java

/*
 * Copyright © 2025 Indiana University
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 *
 * BSD 3-Clause License
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 * Redistribution and use in source and binary forms, with or without
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 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright notice,
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package iu.type;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.util.function.Consumer;
import java.util.function.Predicate;

import edu.iu.type.IuAnnotatedElement;
import jakarta.annotation.security.DenyAll;
import jakarta.annotation.security.PermitAll;
import jakarta.annotation.security.RolesAllowed;

/**
 * Implements the facade view of an {@link AnnotatedElement}.
 * 
 * @param <E> annotated element type
 */
sealed class AnnotatedElementBase<E extends AnnotatedElement> extends ElementBase implements IuAnnotatedElement
		permits DeclaredElementBase, ParameterFacade {

	/**
	 * Real annotated element viewed via this facade.
	 */
	final E annotatedElement;

	/**
	 * Default constructor, for use by all subclasses extend {@link TypeTemplate}.
	 * 
	 * @param annotatedElement real annotated element to provide a view of
	 */
	AnnotatedElementBase(E annotatedElement) {
		this.annotatedElement = annotatedElement;
	}

	/**
	 * Constructor for use by {@link TypeTemplate}.
	 * 
	 * @param annotatedElement real annotated element to provide a view of
	 * @param preInitHook      used by {@link TypeFactory}
	 */
	AnnotatedElementBase(E annotatedElement, Consumer<TypeTemplate<?, ?>> preInitHook) {
		super(preInitHook);
		this.annotatedElement = annotatedElement;
	}

	@Override
	public boolean hasAnnotation(Class<? extends Annotation> annotationType) {
		checkSealed();
		return AnnotationBridge.isAnnotationPresent(annotationType, annotatedElement);
	}

	@Override
	public <A extends Annotation> A annotation(Class<A> annotationType) {
		checkSealed();
		return AnnotationBridge.getAnnotation(annotationType, annotatedElement);
	}

	@Override
	public Iterable<? extends Annotation> annotations() {
		checkSealed();
		return AnnotationBridge.getAnnotations(annotatedElement);
	}

	@Override
	public boolean permitted(Predicate<String> isUserInRole) {
		checkSealed();

		if (hasAnnotation(DenyAll.class))
			return false;

		if (hasAnnotation(PermitAll.class))
			return true;

		var rolesAllowed = annotation(RolesAllowed.class);
		if (rolesAllowed != null)
			for (var role : rolesAllowed.value())
				if (isUserInRole.test(role))
					return true;

		return false;
	}

}