/*
 * Copyright (c) 2022, 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 jdk.internal.classfile;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import jdk.internal.classfile.attribute.AnnotationDefaultAttribute;
import jdk.internal.classfile.attribute.BootstrapMethodsAttribute;
import jdk.internal.classfile.attribute.CharacterRangeInfo;
import jdk.internal.classfile.attribute.CharacterRangeTableAttribute;
import jdk.internal.classfile.attribute.CodeAttribute;
import jdk.internal.classfile.attribute.CompilationIDAttribute;
import jdk.internal.classfile.attribute.ConstantValueAttribute;
import jdk.internal.classfile.attribute.DeprecatedAttribute;
import jdk.internal.classfile.attribute.EnclosingMethodAttribute;
import jdk.internal.classfile.attribute.ExceptionsAttribute;
import jdk.internal.classfile.attribute.InnerClassInfo;
import jdk.internal.classfile.attribute.InnerClassesAttribute;
import jdk.internal.classfile.attribute.LineNumberInfo;
import jdk.internal.classfile.attribute.LineNumberTableAttribute;
import jdk.internal.classfile.attribute.LocalVariableInfo;
import jdk.internal.classfile.attribute.LocalVariableTableAttribute;
import jdk.internal.classfile.attribute.LocalVariableTypeInfo;
import jdk.internal.classfile.attribute.LocalVariableTypeTableAttribute;
import jdk.internal.classfile.attribute.MethodParameterInfo;
import jdk.internal.classfile.attribute.MethodParametersAttribute;
import jdk.internal.classfile.attribute.ModuleAttribute;
import jdk.internal.classfile.attribute.ModuleExportInfo;
import jdk.internal.classfile.attribute.ModuleHashInfo;
import jdk.internal.classfile.attribute.ModuleHashesAttribute;
import jdk.internal.classfile.attribute.ModuleMainClassAttribute;
import jdk.internal.classfile.attribute.ModuleOpenInfo;
import jdk.internal.classfile.attribute.ModulePackagesAttribute;
import jdk.internal.classfile.attribute.ModuleProvideInfo;
import jdk.internal.classfile.attribute.ModuleRequireInfo;
import jdk.internal.classfile.attribute.ModuleResolutionAttribute;
import jdk.internal.classfile.attribute.ModuleTargetAttribute;
import jdk.internal.classfile.attribute.NestHostAttribute;
import jdk.internal.classfile.attribute.NestMembersAttribute;
import jdk.internal.classfile.attribute.PermittedSubclassesAttribute;
import jdk.internal.classfile.attribute.RecordAttribute;
import jdk.internal.classfile.attribute.RecordComponentInfo;
import jdk.internal.classfile.attribute.RuntimeInvisibleAnnotationsAttribute;
import jdk.internal.classfile.attribute.RuntimeInvisibleParameterAnnotationsAttribute;
import jdk.internal.classfile.attribute.RuntimeInvisibleTypeAnnotationsAttribute;
import jdk.internal.classfile.attribute.RuntimeVisibleAnnotationsAttribute;
import jdk.internal.classfile.attribute.RuntimeVisibleParameterAnnotationsAttribute;
import jdk.internal.classfile.attribute.RuntimeVisibleTypeAnnotationsAttribute;
import jdk.internal.classfile.attribute.SignatureAttribute;
import jdk.internal.classfile.attribute.SourceDebugExtensionAttribute;
import jdk.internal.classfile.attribute.SourceFileAttribute;
import jdk.internal.classfile.attribute.SourceIDAttribute;
import jdk.internal.classfile.attribute.StackMapTableAttribute;
import jdk.internal.classfile.attribute.SyntheticAttribute;
import jdk.internal.classfile.constantpool.Utf8Entry;
import jdk.internal.classfile.impl.AbstractAttributeMapper;
import jdk.internal.classfile.impl.BoundAttribute;
import jdk.internal.classfile.impl.CodeImpl;
import jdk.internal.classfile.impl.AbstractPoolEntry;
import jdk.internal.classfile.impl.StackMapDecoder;

/**
 * Attribute mappers for standard classfile attributes.
 *
 * @see AttributeMapper
 */
public class Attributes {

    /** AnnotationDefault */
    public static final String NAME_ANNOTATION_DEFAULT = "AnnotationDefault";

    /** BootstrapMethods */
    public static final String NAME_BOOTSTRAP_METHODS = "BootstrapMethods";

    /** CharacterRangeTable */
    public static final String NAME_CHARACTER_RANGE_TABLE = "CharacterRangeTable";

    /** Code */
    public static final String NAME_CODE = "Code";

    /** CompilationID */
    public static final String NAME_COMPILATION_ID = "CompilationID";

    /** ConstantValue */
    public static final String NAME_CONSTANT_VALUE = "ConstantValue";

    /** Deprecated */
    public static final String NAME_DEPRECATED = "Deprecated";

    /** EnclosingMethod */
    public static final String NAME_ENCLOSING_METHOD = "EnclosingMethod";

    /** Exceptions */
    public static final String NAME_EXCEPTIONS = "Exceptions";

    /** InnerClasses */
    public static final String NAME_INNER_CLASSES = "InnerClasses";

    /** LineNumberTable */
    public static final String NAME_LINE_NUMBER_TABLE = "LineNumberTable";

    /** LocalVariableTable */
    public static final String NAME_LOCAL_VARIABLE_TABLE = "LocalVariableTable";

    /** LocalVariableTypeTable */
    public static final String NAME_LOCAL_VARIABLE_TYPE_TABLE = "LocalVariableTypeTable";

    /** MethodParameters */
    public static final String NAME_METHOD_PARAMETERS = "MethodParameters";

    /** Module */
    public static final String NAME_MODULE = "Module";

    /** ModuleHashes */
    public static final String NAME_MODULE_HASHES = "ModuleHashes";

    /** ModuleMainClass */
    public static final String NAME_MODULE_MAIN_CLASS = "ModuleMainClass";

    /** ModulePackages */
    public static final String NAME_MODULE_PACKAGES = "ModulePackages";

    /** ModuleResolution */
    public static final String NAME_MODULE_RESOLUTION = "ModuleResolution";

    /** ModuleTarget */
    public static final String NAME_MODULE_TARGET = "ModuleTarget";

    /** NestHost */
    public static final String NAME_NEST_HOST = "NestHost";

    /** NestMembers */
    public static final String NAME_NEST_MEMBERS = "NestMembers";

    /** PermittedSubclasses */
    public static final String NAME_PERMITTED_SUBCLASSES = "PermittedSubclasses";

    /** Record */
    public static final String NAME_RECORD = "Record";

    /** RuntimeInvisibleAnnotations */
    public static final String NAME_RUNTIME_INVISIBLE_ANNOTATIONS = "RuntimeInvisibleAnnotations";

    /** RuntimeInvisibleTypeAnnotations */
    public static final String NAME_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS = "RuntimeInvisibleParameterAnnotations";

    /**  */
    public static final String NAME_RUNTIME_INVISIBLE_TYPE_ANNOTATIONS = "RuntimeInvisibleTypeAnnotations";

    /** RuntimeVisibleAnnotations */
    public static final String NAME_RUNTIME_VISIBLE_ANNOTATIONS = "RuntimeVisibleAnnotations";

    /** RuntimeVisibleParameterAnnotations */
    public static final String NAME_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS = "RuntimeVisibleParameterAnnotations";

    /** RuntimeVisibleTypeAnnotations */
    public static final String NAME_RUNTIME_VISIBLE_TYPE_ANNOTATIONS = "RuntimeVisibleTypeAnnotations";

    /** Signature */
    public static final String NAME_SIGNATURE = "Signature";

    /** SourceDebugExtension */
    public static final String NAME_SOURCE_DEBUG_EXTENSION = "SourceDebugExtension";

    /** SourceFile */
    public static final String NAME_SOURCE_FILE = "SourceFile";

    /** SourceID */
    public static final String NAME_SOURCE_ID = "SourceID";

    /** StackMapTable */
    public static final String NAME_STACK_MAP_TABLE = "StackMapTable";

    /** Synthetic */
    public static final String NAME_SYNTHETIC = "Synthetic";

    private Attributes() {
    }

    /** Attribute mapper for the {@code AnnotationDefault} attribute */
    public static final AttributeMapper<AnnotationDefaultAttribute>
            ANNOTATION_DEFAULT = new AbstractAttributeMapper<>(NAME_ANNOTATION_DEFAULT, Classfile.JAVA_5_VERSION) {
                @Override
                public AnnotationDefaultAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundAnnotationDefaultAttr(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, AnnotationDefaultAttribute attr) {
                    attr.defaultValue().writeTo(buf);
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code BootstrapMethods} attribute */
    public static final AttributeMapper<BootstrapMethodsAttribute>
            BOOTSTRAP_METHODS = new AbstractAttributeMapper<>(NAME_BOOTSTRAP_METHODS, Classfile.JAVA_17_VERSION) {
                @Override
                public BootstrapMethodsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundBootstrapMethodsAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, BootstrapMethodsAttribute attr) {
                    buf.writeList(attr.bootstrapMethods());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code CharacterRangeTable} attribute */
    public static final AttributeMapper<CharacterRangeTableAttribute>
            CHARACTER_RANGE_TABLE = new AbstractAttributeMapper<>(NAME_CHARACTER_RANGE_TABLE, true, Classfile.JAVA_4_VERSION) {
                @Override
                public CharacterRangeTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundCharacterRangeTableAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, CharacterRangeTableAttribute attr) {
                    List<CharacterRangeInfo> ranges = attr.characterRangeTable();
                    buf.writeU2(ranges.size());
                    for (CharacterRangeInfo info : ranges) {
                        buf.writeU2(info.startPc());
                        buf.writeU2(info.endPc());
                        buf.writeInt(info.characterRangeStart());
                        buf.writeInt(info.characterRangeEnd());
                        buf.writeU2(info.flags());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.LABELS;
                }
            };

    /** Attribute mapper for the {@code Code} attribute */
    public static final AttributeMapper<CodeAttribute>
            CODE = new AbstractAttributeMapper<>(NAME_CODE) {
                @Override
                public CodeAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new CodeImpl(e, cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, CodeAttribute attr) {
                    throw new UnsupportedOperationException("Code attribute does not support direct write");
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };


    /** Attribute mapper for the {@code CompilationID} attribute */
    public static final AttributeMapper<CompilationIDAttribute>
            COMPILATION_ID = new AbstractAttributeMapper<>(NAME_COMPILATION_ID, true) {
                @Override
                public CompilationIDAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundCompilationIDAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, CompilationIDAttribute attr) {
                    buf.writeIndex(attr.compilationId());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code ConstantValue} attribute */
    public static final AttributeMapper<ConstantValueAttribute>
            CONSTANT_VALUE = new AbstractAttributeMapper<>(NAME_CONSTANT_VALUE) {
                @Override
                public ConstantValueAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundConstantValueAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ConstantValueAttribute attr) {
                    buf.writeIndex(attr.constant());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code Deprecated} attribute */
    public static final AttributeMapper<DeprecatedAttribute>
            DEPRECATED = new AbstractAttributeMapper<>(NAME_DEPRECATED, true) {
                @Override
                public DeprecatedAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundDeprecatedAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, DeprecatedAttribute attr) {
                    // empty
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.STATELESS;
                }
            };

    /** Attribute mapper for the {@code EnclosingMethod} attribute */
    public static final AttributeMapper<EnclosingMethodAttribute>
            ENCLOSING_METHOD = new AbstractAttributeMapper<>(NAME_ENCLOSING_METHOD, Classfile.JAVA_5_VERSION) {
                @Override
                public EnclosingMethodAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundEnclosingMethodAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, EnclosingMethodAttribute attr) {
                    buf.writeIndex(attr.enclosingClass());
                    buf.writeIndexOrZero(attr.enclosingMethod().orElse(null));
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code Exceptions} attribute */
    public static final AttributeMapper<ExceptionsAttribute>
            EXCEPTIONS = new AbstractAttributeMapper<>(NAME_EXCEPTIONS) {
                @Override
                public ExceptionsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundExceptionsAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ExceptionsAttribute attr) {
                    buf.writeListIndices(attr.exceptions());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code InnerClasses} attribute */
    public static final AttributeMapper<InnerClassesAttribute>
            INNER_CLASSES = new AbstractAttributeMapper<>(NAME_INNER_CLASSES) {
                @Override
                public InnerClassesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundInnerClassesAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, InnerClassesAttribute attr) {
                    List<InnerClassInfo> classes = attr.classes();
                    buf.writeU2(classes.size());
                    for (InnerClassInfo ic : classes) {
                        buf.writeIndex(ic.innerClass());
                        buf.writeIndexOrZero(ic.outerClass().orElse(null));
                        buf.writeIndexOrZero(ic.innerName().orElse(null));
                        buf.writeU2(ic.flagsMask());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code LineNumberTable} attribute */
    public static final AttributeMapper<LineNumberTableAttribute>
            LINE_NUMBER_TABLE = new AbstractAttributeMapper<>(NAME_LINE_NUMBER_TABLE, true) {
                @Override
                public LineNumberTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundLineNumberTableAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, LineNumberTableAttribute attr) {
                    List<LineNumberInfo> lines = attr.lineNumbers();
                    buf.writeU2(lines.size());
                    for (LineNumberInfo line : lines) {
                        buf.writeU2(line.startPc());
                        buf.writeU2(line.lineNumber());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.LABELS;
                }
            };

    /** Attribute mapper for the {@code LocalVariableTable} attribute */
    public static final AttributeMapper<LocalVariableTableAttribute>
            LOCAL_VARIABLE_TABLE = new AbstractAttributeMapper<>(NAME_LOCAL_VARIABLE_TABLE, true) {
                @Override
                public LocalVariableTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundLocalVariableTableAttribute(e, cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, LocalVariableTableAttribute attr) {
                    List<LocalVariableInfo> infos = attr.localVariables();
                    buf.writeU2(infos.size());
                    for (LocalVariableInfo info : infos) {
                        buf.writeU2(info.startPc());
                        buf.writeU2(info.length());
                        buf.writeIndex(info.name());
                        buf.writeIndex(info.type());
                        buf.writeU2(info.slot());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.LABELS;
                }
            };

    /** Attribute mapper for the {@code LocalVariableTypeTable} attribute */
    public static final AttributeMapper<LocalVariableTypeTableAttribute>
            LOCAL_VARIABLE_TYPE_TABLE = new AbstractAttributeMapper<>(NAME_LOCAL_VARIABLE_TYPE_TABLE, true, Classfile.JAVA_5_VERSION) {
                @Override
                public LocalVariableTypeTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundLocalVariableTypeTableAttribute(e, cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, LocalVariableTypeTableAttribute attr) {
                    List<LocalVariableTypeInfo> infos = attr.localVariableTypes();
                    buf.writeU2(infos.size());
                    for (LocalVariableTypeInfo info : infos) {
                        buf.writeU2(info.startPc());
                        buf.writeU2(info.length());
                        buf.writeIndex(info.name());
                        buf.writeIndex(info.signature());
                        buf.writeU2(info.slot());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.LABELS;
                }
            };

    /** Attribute mapper for the {@code MethodParameters} attribute */
    public static final AttributeMapper<MethodParametersAttribute>
            METHOD_PARAMETERS = new AbstractAttributeMapper<>(NAME_METHOD_PARAMETERS, Classfile.JAVA_8_VERSION) {
                @Override
                public MethodParametersAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundMethodParametersAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, MethodParametersAttribute attr) {
                    List<MethodParameterInfo> parameters = attr.parameters();
                    buf.writeU1(parameters.size());
                    for (MethodParameterInfo info : parameters) {
                        buf.writeIndexOrZero(info.name().orElse(null));
                        buf.writeU2(info.flagsMask());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code Module} attribute */
    public static final AttributeMapper<ModuleAttribute>
            MODULE = new AbstractAttributeMapper<>(NAME_MODULE, Classfile.JAVA_9_VERSION) {
                @Override
                public ModuleAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundModuleAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ModuleAttribute attr) {
                    buf.writeIndex(attr.moduleName());
                    buf.writeU2(attr.moduleFlagsMask());
                    buf.writeIndexOrZero(attr.moduleVersion().orElse(null));
                    buf.writeU2(attr.requires().size());
                    for (ModuleRequireInfo require : attr.requires()) {
                        buf.writeIndex(require.requires());
                        buf.writeU2(require.requiresFlagsMask());
                        buf.writeIndexOrZero(require.requiresVersion().orElse(null));
                    }
                    buf.writeU2(attr.exports().size());
                    for (ModuleExportInfo export : attr.exports()) {
                        buf.writeIndex(export.exportedPackage());
                        buf.writeU2(export.exportsFlagsMask());
                        buf.writeListIndices(export.exportsTo());
                    }
                    buf.writeU2(attr.opens().size());
                    for (ModuleOpenInfo open : attr.opens()) {
                        buf.writeIndex(open.openedPackage());
                        buf.writeU2(open.opensFlagsMask());
                        buf.writeListIndices(open.opensTo());
                    }
                    buf.writeListIndices(attr.uses());
                    buf.writeU2(attr.provides().size());
                    for (ModuleProvideInfo provide : attr.provides()) {
                        buf.writeIndex(provide.provides());
                        buf.writeListIndices(provide.providesWith());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code ModuleHashes} attribute */
    public static final AttributeMapper<ModuleHashesAttribute>
            MODULE_HASHES = new AbstractAttributeMapper<>(NAME_MODULE_HASHES, Classfile.JAVA_9_VERSION) {
                @Override
                public ModuleHashesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundModuleHashesAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ModuleHashesAttribute attr) {
                    buf.writeIndex(attr.algorithm());
                    List<ModuleHashInfo> hashes = attr.hashes();
                    buf.writeU2(hashes.size());
                    for (ModuleHashInfo hash : hashes) {
                        buf.writeIndex(hash.moduleName());
                        buf.writeU2(hash.hash().length);
                        buf.writeBytes(hash.hash());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code ModuleMainClass} attribute */
    public static final AttributeMapper<ModuleMainClassAttribute>
            MODULE_MAIN_CLASS = new AbstractAttributeMapper<>(NAME_MODULE_MAIN_CLASS, Classfile.JAVA_9_VERSION) {
                @Override
                public ModuleMainClassAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundModuleMainClassAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ModuleMainClassAttribute attr) {
                    buf.writeIndex(attr.mainClass());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code ModulePackages} attribute */
    public static final AttributeMapper<ModulePackagesAttribute>
            MODULE_PACKAGES = new AbstractAttributeMapper<>(NAME_MODULE_PACKAGES, Classfile.JAVA_9_VERSION) {
                @Override
                public ModulePackagesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundModulePackagesAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ModulePackagesAttribute attr) {
                    buf.writeListIndices(attr.packages());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code ModuleResolution} attribute */
    public static final AttributeMapper<ModuleResolutionAttribute>
            MODULE_RESOLUTION = new AbstractAttributeMapper<>(NAME_MODULE_RESOLUTION, Classfile.JAVA_9_VERSION) {
                @Override
                public ModuleResolutionAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundModuleResolutionAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ModuleResolutionAttribute attr) {
                    buf.writeU2(attr.resolutionFlags());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.STATELESS;
                }
            };

    /** Attribute mapper for the {@code ModuleTarget} attribute */
    public static final AttributeMapper<ModuleTargetAttribute>
            MODULE_TARGET = new AbstractAttributeMapper<>(NAME_MODULE_TARGET, Classfile.JAVA_9_VERSION) {
                @Override
                public ModuleTargetAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundModuleTargetAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, ModuleTargetAttribute attr) {
                    buf.writeIndex(attr.targetPlatform());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code NestHost} attribute */
    public static final AttributeMapper<NestHostAttribute>
            NEST_HOST = new AbstractAttributeMapper<>(NAME_NEST_HOST, Classfile.JAVA_11_VERSION) {
                @Override
                public NestHostAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundNestHostAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, NestHostAttribute attr) {
                    buf.writeIndex(attr.nestHost());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code NestMembers} attribute */
    public static final AttributeMapper<NestMembersAttribute>
            NEST_MEMBERS = new AbstractAttributeMapper<>(NAME_NEST_MEMBERS, Classfile.JAVA_11_VERSION) {
                @Override
                public NestMembersAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundNestMembersAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, NestMembersAttribute attr) {
                    buf.writeListIndices(attr.nestMembers());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code PermittedSubclasses} attribute */
    public static final AttributeMapper<PermittedSubclassesAttribute>
            PERMITTED_SUBCLASSES = new AbstractAttributeMapper<>(NAME_PERMITTED_SUBCLASSES, Classfile.JAVA_15_VERSION) {
                @Override
                public PermittedSubclassesAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundPermittedSubclassesAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, PermittedSubclassesAttribute attr) {
                    buf.writeListIndices(attr.permittedSubclasses());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code Record} attribute */
    public static final AttributeMapper<RecordAttribute>
            RECORD = new AbstractAttributeMapper<>(NAME_RECORD, Classfile.JAVA_16_VERSION) {
                @Override
                public RecordAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundRecordAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, RecordAttribute attr) {
                    List<RecordComponentInfo> components = attr.components();
                    buf.writeU2(components.size());
                    for (RecordComponentInfo info : components) {
                        buf.writeIndex(info.name());
                        buf.writeIndex(info.descriptor());
                        buf.writeList(info.attributes());
                    }
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code RuntimeInvisibleAnnotations} attribute */
    public static final AttributeMapper<RuntimeInvisibleAnnotationsAttribute>
            RUNTIME_INVISIBLE_ANNOTATIONS = new AbstractAttributeMapper<>(NAME_RUNTIME_INVISIBLE_ANNOTATIONS, Classfile.JAVA_5_VERSION) {
                @Override
                public RuntimeInvisibleAnnotationsAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) {
                    return new BoundAttribute.BoundRuntimeInvisibleAnnotationsAttribute(cf, pos);
                }

                @Override
                protected void writeBody(BufWriter buf, RuntimeInvisibleAnnotationsAttribute attr) {
                    buf.writeList(attr.annotations());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code RuntimeInvisibleParameterAnnotations} attribute */
    public static final AttributeMapper<RuntimeInvisibleParameterAnnotationsAttribute>
            RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS = new AbstractAttributeMapper<>(NAME_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS, Classfile.JAVA_5_VERSION) {
                @Override
                public RuntimeInvisibleParameterAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundRuntimeInvisibleParameterAnnotationsAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, RuntimeInvisibleParameterAnnotationsAttribute attr) {
                    List<List<Annotation>> lists = attr.parameterAnnotations();
                    buf.writeU1(lists.size());
                    for (List<Annotation> list : lists)
                        buf.writeList(list);
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code RuntimeInvisibleTypeAnnotations} attribute */
    public static final AttributeMapper<RuntimeInvisibleTypeAnnotationsAttribute>
            RUNTIME_INVISIBLE_TYPE_ANNOTATIONS = new AbstractAttributeMapper<>(NAME_RUNTIME_INVISIBLE_TYPE_ANNOTATIONS, Classfile.JAVA_8_VERSION) {
                @Override
                public RuntimeInvisibleTypeAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundRuntimeInvisibleTypeAnnotationsAttribute(e, cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, RuntimeInvisibleTypeAnnotationsAttribute attr) {
                    buf.writeList(attr.annotations());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.UNSTABLE;
                }
            };

    /** Attribute mapper for the {@code RuntimeVisibleAnnotations} attribute */
    public static final AttributeMapper<RuntimeVisibleAnnotationsAttribute>
            RUNTIME_VISIBLE_ANNOTATIONS = new AbstractAttributeMapper<>(NAME_RUNTIME_VISIBLE_ANNOTATIONS, Classfile.JAVA_5_VERSION) {
                @Override
                public RuntimeVisibleAnnotationsAttribute readAttribute(AttributedElement enclosing, ClassReader cf, int pos) {
                    return new BoundAttribute.BoundRuntimeVisibleAnnotationsAttribute(cf, pos);
                }

                @Override
                protected void writeBody(BufWriter buf, RuntimeVisibleAnnotationsAttribute attr) {
                    buf.writeList(attr.annotations());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code RuntimeVisibleParameterAnnotations} attribute */
    public static final AttributeMapper<RuntimeVisibleParameterAnnotationsAttribute>
            RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS = new AbstractAttributeMapper<>(NAME_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, Classfile.JAVA_5_VERSION) {
                @Override
                public RuntimeVisibleParameterAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundRuntimeVisibleParameterAnnotationsAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, RuntimeVisibleParameterAnnotationsAttribute attr) {
                    List<List<Annotation>> lists = attr.parameterAnnotations();
                    buf.writeU1(lists.size());
                    for (List<Annotation> list : lists)
                        buf.writeList(list);
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code RuntimeVisibleTypeAnnotations} attribute */
    public static final AttributeMapper<RuntimeVisibleTypeAnnotationsAttribute>
            RUNTIME_VISIBLE_TYPE_ANNOTATIONS = new AbstractAttributeMapper<>(NAME_RUNTIME_VISIBLE_TYPE_ANNOTATIONS, Classfile.JAVA_8_VERSION) {
                @Override
                public RuntimeVisibleTypeAnnotationsAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundRuntimeVisibleTypeAnnotationsAttribute(e, cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, RuntimeVisibleTypeAnnotationsAttribute attr) {
                    buf.writeList(attr.annotations());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.UNSTABLE;
                }
            };

    /** Attribute mapper for the {@code Signature} attribute */
    public static final AttributeMapper<SignatureAttribute>
            SIGNATURE = new AbstractAttributeMapper<>(NAME_SIGNATURE, Classfile.JAVA_5_VERSION) {
                @Override
                public SignatureAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundSignatureAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, SignatureAttribute attr) {
                    buf.writeIndex(attr.signature());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code SourceDebugExtension} attribute */
    public static final AttributeMapper<SourceDebugExtensionAttribute>
            SOURCE_DEBUG_EXTENSION = new AbstractAttributeMapper<>(NAME_SOURCE_DEBUG_EXTENSION, Classfile.JAVA_5_VERSION) {
                @Override
                public SourceDebugExtensionAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundSourceDebugExtensionAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, SourceDebugExtensionAttribute attr) {
                    buf.writeBytes(attr.contents());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.STATELESS;
                }
            };

    /** Attribute mapper for the {@code SourceFile} attribute */
    public static final AttributeMapper<SourceFileAttribute>
            SOURCE_FILE = new AbstractAttributeMapper<>(NAME_SOURCE_FILE) {
                @Override
                public SourceFileAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundSourceFileAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, SourceFileAttribute attr) {
                    buf.writeIndex(attr.sourceFile());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code SourceID} attribute */
    public static final AttributeMapper<SourceIDAttribute>
            SOURCE_ID = new AbstractAttributeMapper<>(NAME_SOURCE_ID) {
                @Override
                public SourceIDAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundSourceIDAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, SourceIDAttribute attr) {
                    buf.writeIndex(attr.sourceId());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.CP_REFS;
                }
            };

    /** Attribute mapper for the {@code StackMapTable} attribute */
    public static final AttributeMapper<StackMapTableAttribute>
            STACK_MAP_TABLE = new AbstractAttributeMapper<>(NAME_STACK_MAP_TABLE, Classfile.JAVA_6_VERSION) {
                @Override
                public StackMapTableAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundStackMapTableAttribute((CodeImpl)e, cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter b, StackMapTableAttribute attr) {
                    StackMapDecoder.writeFrames(b, attr.entries());
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.LABELS;
                }
            };


    /** Attribute mapper for the {@code Synthetic} attribute */
    public static final AttributeMapper<SyntheticAttribute>
            SYNTHETIC = new AbstractAttributeMapper<>(NAME_SYNTHETIC, true) {
                @Override
                public SyntheticAttribute readAttribute(AttributedElement e, ClassReader cf, int p) {
                    return new BoundAttribute.BoundSyntheticAttribute(cf, this, p);
                }

                @Override
                protected void writeBody(BufWriter buf, SyntheticAttribute attr) {
                    // empty
                }

                @Override
                public AttributeMapper.AttributeStability stability() {
                    return AttributeStability.STATELESS;
                }
            };

    /**
     * {@return the attribute mapper for a standard attribute}
     *
     * @param name the name of the attribute to find
     */
    public static AttributeMapper<?> standardAttribute(Utf8Entry name) {
        return _ATTR_MAP.get(name);
    }

    /**
     * All standard attribute mappers.
     */
    public static final Set<AttributeMapper<?>> PREDEFINED_ATTRIBUTES = Set.of(
            ANNOTATION_DEFAULT,
            BOOTSTRAP_METHODS,
            CHARACTER_RANGE_TABLE,
            CODE,
            COMPILATION_ID,
            CONSTANT_VALUE,
            DEPRECATED,
            ENCLOSING_METHOD,
            EXCEPTIONS,
            INNER_CLASSES,
            LINE_NUMBER_TABLE,
            LOCAL_VARIABLE_TABLE,
            LOCAL_VARIABLE_TYPE_TABLE,
            METHOD_PARAMETERS,
            MODULE,
            MODULE_HASHES,
            MODULE_MAIN_CLASS,
            MODULE_PACKAGES,
            MODULE_RESOLUTION,
            MODULE_TARGET,
            NEST_HOST,
            NEST_MEMBERS,
            PERMITTED_SUBCLASSES,
            RECORD,
            RUNTIME_INVISIBLE_ANNOTATIONS,
            RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS,
            RUNTIME_INVISIBLE_TYPE_ANNOTATIONS,
            RUNTIME_VISIBLE_ANNOTATIONS,
            RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS,
            RUNTIME_VISIBLE_TYPE_ANNOTATIONS,
            SIGNATURE,
            SOURCE_DEBUG_EXTENSION,
            SOURCE_FILE,
            SOURCE_ID,
            STACK_MAP_TABLE,
            SYNTHETIC);

    private static final Map<Utf8Entry, AttributeMapper<?>> _ATTR_MAP;
    //no lambdas here as this is on critical JDK boostrap path
    static {
        var map = new HashMap<Utf8Entry, AttributeMapper<?>>(64);
        for (var am : PREDEFINED_ATTRIBUTES) {
            map.put(AbstractPoolEntry.rawUtf8EntryFromStandardAttributeName(am.name()), am);
        }
        _ATTR_MAP = Collections.unmodifiableMap(map);
    }
}
