jdk/src/java.base/share/classes/java/lang/classfile/Annotation.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * accompanied this code).
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package java.lang.classfile;

import java.lang.classfile.attribute.RuntimeInvisibleAnnotationsAttribute;
import java.lang.classfile.attribute.RuntimeInvisibleParameterAnnotationsAttribute;
import java.lang.classfile.attribute.RuntimeVisibleAnnotationsAttribute;
import java.lang.classfile.attribute.RuntimeVisibleParameterAnnotationsAttribute;
import java.lang.classfile.constantpool.Utf8Entry;
import jdk.internal.classfile.impl.AnnotationImpl;
import jdk.internal.classfile.impl.TemporaryConstantPool;

import java.lang.constant.ClassDesc;
import java.util.List;
import jdk.internal.javac.PreviewFeature;

/**
 * Models an annotation on a declaration.
 *
 * @see AnnotationElement
 * @see AnnotationValue
 * @see RuntimeVisibleAnnotationsAttribute
 * @see RuntimeInvisibleAnnotationsAttribute
 * @see RuntimeVisibleParameterAnnotationsAttribute
 * @see RuntimeInvisibleParameterAnnotationsAttribute
 *
 * @sealedGraph
 * @since 22
 */
@PreviewFeature(feature = PreviewFeature.Feature.CLASSFILE_API)
public sealed interface Annotation
        extends WritableElement<Annotation>
        permits TypeAnnotation, AnnotationImpl {

    /**
     * {@return the class of the annotation}
     */
    Utf8Entry className();

    /**
     * {@return the class of the annotation, as a symbolic descriptor}
     */
    default ClassDesc classSymbol() {
        return ClassDesc.ofDescriptor(className().stringValue());
    }

    /**
     * {@return the elements of the annotation}
     */
    List<AnnotationElement> elements();

    /**
     * {@return an annotation}
     * @param annotationClass the class of the annotation
     * @param elements the elements of the annotation
     */
    static Annotation of(Utf8Entry annotationClass,
                         List<AnnotationElement> elements) {
        return new AnnotationImpl(annotationClass, elements);
    }

    /**
     * {@return an annotation}
     * @param annotationClass the class of the annotation
     * @param elements the elements of the annotation
     */
    static Annotation of(Utf8Entry annotationClass,
                         AnnotationElement... elements) {
        return of(annotationClass, List.of(elements));
    }

    /**
     * {@return an annotation}
     * @param annotationClass the class of the annotation
     * @param elements the elements of the annotation
     */
    static Annotation of(ClassDesc annotationClass,
                         List<AnnotationElement> elements) {
        return of(TemporaryConstantPool.INSTANCE.utf8Entry(annotationClass.descriptorString()), elements);
    }

    /**
     * {@return an annotation}
     * @param annotationClass the class of the annotation
     * @param elements the elements of the annotation
     */
    static Annotation of(ClassDesc annotationClass,
                         AnnotationElement... elements) {
        return of(TemporaryConstantPool.INSTANCE.utf8Entry(annotationClass.descriptorString()), elements);
    }
}