/* * Copyright (c) 2007, 2018, 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 com.sun.tools.classfile; import java.io.IOException; import java.lang.reflect.Constructor; import java.util.HashMap; import java.util.Map; /** *

This is NOT part of any supported API. * If you write code that depends on this, you do so at your own risk. * This code and its internal interfaces are subject to change or * deletion without notice. */ public abstract class Attribute { public static final String AnnotationDefault = "AnnotationDefault"; public static final String BootstrapMethods = "BootstrapMethods"; public static final String CharacterRangeTable = "CharacterRangeTable"; public static final String Code = "Code"; public static final String ConstantValue = "ConstantValue"; public static final String CompilationID = "CompilationID"; public static final String Deprecated = "Deprecated"; public static final String EnclosingMethod = "EnclosingMethod"; public static final String Exceptions = "Exceptions"; public static final String InnerClasses = "InnerClasses"; public static final String LineNumberTable = "LineNumberTable"; public static final String LocalVariableTable = "LocalVariableTable"; public static final String LocalVariableTypeTable = "LocalVariableTypeTable"; public static final String MethodParameters = "MethodParameters"; public static final String Module = "Module"; public static final String ModuleHashes = "ModuleHashes"; public static final String ModuleMainClass = "ModuleMainClass"; public static final String ModulePackages = "ModulePackages"; public static final String ModuleResolution = "ModuleResolution"; public static final String ModuleTarget = "ModuleTarget"; public static final String NestHost = "NestHost"; public static final String NestMembers = "NestMembers"; public static final String RuntimeVisibleAnnotations = "RuntimeVisibleAnnotations"; public static final String RuntimeInvisibleAnnotations = "RuntimeInvisibleAnnotations"; public static final String RuntimeVisibleParameterAnnotations = "RuntimeVisibleParameterAnnotations"; public static final String RuntimeInvisibleParameterAnnotations = "RuntimeInvisibleParameterAnnotations"; public static final String RuntimeVisibleTypeAnnotations = "RuntimeVisibleTypeAnnotations"; public static final String RuntimeInvisibleTypeAnnotations = "RuntimeInvisibleTypeAnnotations"; public static final String Signature = "Signature"; public static final String SourceDebugExtension = "SourceDebugExtension"; public static final String SourceFile = "SourceFile"; public static final String SourceID = "SourceID"; public static final String StackMap = "StackMap"; public static final String StackMapTable = "StackMapTable"; public static final String Synthetic = "Synthetic"; public static class Factory { public Factory() { // defer init of standardAttributeClasses until after options set up } public Attribute createAttribute(ClassReader cr, int name_index, byte[] data) throws IOException { if (standardAttributes == null) { init(); } ConstantPool cp = cr.getConstantPool(); String reasonForDefaultAttr; try { String name = cp.getUTF8Value(name_index); Class attrClass = standardAttributes.get(name); if (attrClass != null) { try { Class[] constrArgTypes = {ClassReader.class, int.class, int.class}; Constructor constr = attrClass.getDeclaredConstructor(constrArgTypes); return constr.newInstance(cr, name_index, data.length); } catch (Throwable t) { reasonForDefaultAttr = t.toString(); // fall through and use DefaultAttribute // t.printStackTrace(); } } else { reasonForDefaultAttr = "unknown attribute"; } } catch (ConstantPoolException e) { reasonForDefaultAttr = e.toString(); // fall through and use DefaultAttribute } return new DefaultAttribute(cr, name_index, data, reasonForDefaultAttr); } protected void init() { standardAttributes = new HashMap<>(); standardAttributes.put(AnnotationDefault, AnnotationDefault_attribute.class); standardAttributes.put(BootstrapMethods, BootstrapMethods_attribute.class); standardAttributes.put(CharacterRangeTable, CharacterRangeTable_attribute.class); standardAttributes.put(Code, Code_attribute.class); standardAttributes.put(CompilationID, CompilationID_attribute.class); standardAttributes.put(ConstantValue, ConstantValue_attribute.class); standardAttributes.put(Deprecated, Deprecated_attribute.class); standardAttributes.put(EnclosingMethod, EnclosingMethod_attribute.class); standardAttributes.put(Exceptions, Exceptions_attribute.class); standardAttributes.put(InnerClasses, InnerClasses_attribute.class); standardAttributes.put(LineNumberTable, LineNumberTable_attribute.class); standardAttributes.put(LocalVariableTable, LocalVariableTable_attribute.class); standardAttributes.put(LocalVariableTypeTable, LocalVariableTypeTable_attribute.class); standardAttributes.put(MethodParameters, MethodParameters_attribute.class); standardAttributes.put(Module, Module_attribute.class); standardAttributes.put(ModuleHashes, ModuleHashes_attribute.class); standardAttributes.put(ModuleMainClass, ModuleMainClass_attribute.class); standardAttributes.put(ModulePackages, ModulePackages_attribute.class); standardAttributes.put(ModuleResolution, ModuleResolution_attribute.class); standardAttributes.put(ModuleTarget, ModuleTarget_attribute.class); standardAttributes.put(NestHost, NestHost_attribute.class); standardAttributes.put(NestMembers, NestMembers_attribute.class); standardAttributes.put(RuntimeInvisibleAnnotations, RuntimeInvisibleAnnotations_attribute.class); standardAttributes.put(RuntimeInvisibleParameterAnnotations, RuntimeInvisibleParameterAnnotations_attribute.class); standardAttributes.put(RuntimeVisibleAnnotations, RuntimeVisibleAnnotations_attribute.class); standardAttributes.put(RuntimeVisibleParameterAnnotations, RuntimeVisibleParameterAnnotations_attribute.class); standardAttributes.put(RuntimeVisibleTypeAnnotations, RuntimeVisibleTypeAnnotations_attribute.class); standardAttributes.put(RuntimeInvisibleTypeAnnotations, RuntimeInvisibleTypeAnnotations_attribute.class); standardAttributes.put(Signature, Signature_attribute.class); standardAttributes.put(SourceDebugExtension, SourceDebugExtension_attribute.class); standardAttributes.put(SourceFile, SourceFile_attribute.class); standardAttributes.put(SourceID, SourceID_attribute.class); standardAttributes.put(StackMap, StackMap_attribute.class); standardAttributes.put(StackMapTable, StackMapTable_attribute.class); standardAttributes.put(Synthetic, Synthetic_attribute.class); } private Map> standardAttributes; } public static Attribute read(ClassReader cr) throws IOException { return cr.readAttribute(); } protected Attribute(int name_index, int length) { attribute_name_index = name_index; attribute_length = length; } public String getName(ConstantPool constant_pool) throws ConstantPoolException { return constant_pool.getUTF8Value(attribute_name_index); } public abstract R accept(Attribute.Visitor visitor, D data); public int byteLength() { return 6 + attribute_length; } public final int attribute_name_index; public final int attribute_length; public interface Visitor { R visitBootstrapMethods(BootstrapMethods_attribute attr, P p); R visitDefault(DefaultAttribute attr, P p); R visitAnnotationDefault(AnnotationDefault_attribute attr, P p); R visitCharacterRangeTable(CharacterRangeTable_attribute attr, P p); R visitCode(Code_attribute attr, P p); R visitCompilationID(CompilationID_attribute attr, P p); R visitConstantValue(ConstantValue_attribute attr, P p); R visitDeprecated(Deprecated_attribute attr, P p); R visitEnclosingMethod(EnclosingMethod_attribute attr, P p); R visitExceptions(Exceptions_attribute attr, P p); R visitInnerClasses(InnerClasses_attribute attr, P p); R visitLineNumberTable(LineNumberTable_attribute attr, P p); R visitLocalVariableTable(LocalVariableTable_attribute attr, P p); R visitLocalVariableTypeTable(LocalVariableTypeTable_attribute attr, P p); R visitMethodParameters(MethodParameters_attribute attr, P p); R visitModule(Module_attribute attr, P p); R visitModuleHashes(ModuleHashes_attribute attr, P p); R visitModuleMainClass(ModuleMainClass_attribute attr, P p); R visitModulePackages(ModulePackages_attribute attr, P p); R visitModuleResolution(ModuleResolution_attribute attr, P p); R visitModuleTarget(ModuleTarget_attribute attr, P p); R visitNestHost(NestHost_attribute attr, P p); R visitNestMembers(NestMembers_attribute attr, P p); R visitRuntimeVisibleAnnotations(RuntimeVisibleAnnotations_attribute attr, P p); R visitRuntimeInvisibleAnnotations(RuntimeInvisibleAnnotations_attribute attr, P p); R visitRuntimeVisibleParameterAnnotations(RuntimeVisibleParameterAnnotations_attribute attr, P p); R visitRuntimeInvisibleParameterAnnotations(RuntimeInvisibleParameterAnnotations_attribute attr, P p); R visitRuntimeVisibleTypeAnnotations(RuntimeVisibleTypeAnnotations_attribute attr, P p); R visitRuntimeInvisibleTypeAnnotations(RuntimeInvisibleTypeAnnotations_attribute attr, P p); R visitSignature(Signature_attribute attr, P p); R visitSourceDebugExtension(SourceDebugExtension_attribute attr, P p); R visitSourceFile(SourceFile_attribute attr, P p); R visitSourceID(SourceID_attribute attr, P p); R visitStackMap(StackMap_attribute attr, P p); R visitStackMapTable(StackMapTable_attribute attr, P p); R visitSynthetic(Synthetic_attribute attr, P p); } }