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73 lines
2.5 KiB
Java
73 lines
2.5 KiB
Java
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.lang.classfile;
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import jdk.internal.javac.PreviewFeature;
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/**
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* Models a non-standard attribute of a classfile. Clients should extend
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* this class to provide an implementation class for non-standard attributes,
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* and provide an {@link AttributeMapper} to mediate between the classfile
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* format and the {@linkplain CustomAttribute} representation.
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* @param <T> the custom attribute type
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*
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* @since 22
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*/
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@PreviewFeature(feature = PreviewFeature.Feature.CLASSFILE_API)
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public abstract non-sealed class CustomAttribute<T extends CustomAttribute<T>>
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implements Attribute<T>, CodeElement, ClassElement, MethodElement, FieldElement {
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private final AttributeMapper<T> mapper;
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/**
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* Construct a {@linkplain CustomAttribute}.
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* @param mapper the attribute mapper
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*/
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protected CustomAttribute(AttributeMapper<T> mapper) {
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this.mapper = mapper;
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}
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@Override
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public final AttributeMapper<T> attributeMapper() {
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return mapper;
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}
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@Override
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public final String attributeName() {
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return mapper.name();
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}
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@Override
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@SuppressWarnings("unchecked")
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public final void writeTo(BufWriter buf) {
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mapper.writeAttribute(buf, (T) this);
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}
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@Override
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public String toString() {
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return String.format("CustomAttribute[name=%s]", mapper.name());
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}
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}
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