2025-01-27 14:03:35 +00:00

83 lines
3.0 KiB
Java

/*
* Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.lang.classfile;
import java.lang.classfile.constantpool.Utf8Entry;
import java.lang.constant.ClassDesc;
import java.lang.reflect.AccessFlag;
import java.util.Optional;
import java.util.function.Consumer;
import jdk.internal.classfile.impl.BufferedFieldBuilder;
import jdk.internal.classfile.impl.FieldImpl;
import jdk.internal.classfile.impl.Util;
/**
* Models a field. A field can be viewed as a {@linkplain CompoundElement
* composition} of {@link FieldElement}s, or by random access via accessor
* methods if only specific parts of the field is needed.
* <p>
* Fields can be obtained from {@link ClassModel#fields()}, or in the traversal
* of member elements of a class.
* <p>
* {@link ClassBuilder#withField(String, ClassDesc, Consumer)} is the main way
* to construct fields. {@link ClassBuilder#transformField} allows creating a
* new field by selectively processing the original field elements and directing
* the results to a field builder.
* <p>
* All field attributes are accessible as member elements.
*
* @see ClassModel#fields()
* @see FieldTransform
* @jvms 4.5 Fields
* @since 24
*/
public sealed interface FieldModel
extends CompoundElement<FieldElement>, AttributedElement, ClassElement
permits BufferedFieldBuilder.Model, FieldImpl {
/**
* {@return the access flags}
*
* @see AccessFlag.Location#FIELD
*/
AccessFlags flags();
/** {@return the class model this field is a member of, if known} */
Optional<ClassModel> parent();
/** {@return the name of this field} */
Utf8Entry fieldName();
/** {@return the field descriptor string of this field} */
Utf8Entry fieldType();
/** {@return the field type, as a symbolic descriptor} */
default ClassDesc fieldTypeSymbol() {
return Util.fieldTypeSymbol(fieldType());
}
}