langtools/src/share/classes/com/sun/tools/javap/AttributeWriter.java
changeset 727 cb50c1ae7bab
child 733 b76c4357c649
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javap/AttributeWriter.java	Tue Jun 03 13:26:47 2008 -0700
@@ -0,0 +1,679 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.tools.javap;
+
+import java.util.Formatter;
+
+import com.sun.tools.classfile.AccessFlags;
+import com.sun.tools.classfile.AnnotationDefault_attribute;
+import com.sun.tools.classfile.Attribute;
+import com.sun.tools.classfile.Attributes;
+import com.sun.tools.classfile.CharacterRangeTable_attribute;
+import com.sun.tools.classfile.Code_attribute;
+import com.sun.tools.classfile.CompilationID_attribute;
+import com.sun.tools.classfile.ConstantPool;
+import com.sun.tools.classfile.ConstantPoolException;
+import com.sun.tools.classfile.ConstantValue_attribute;
+import com.sun.tools.classfile.DefaultAttribute;
+import com.sun.tools.classfile.Deprecated_attribute;
+import com.sun.tools.classfile.EnclosingMethod_attribute;
+import com.sun.tools.classfile.Exceptions_attribute;
+import com.sun.tools.classfile.Field;
+import com.sun.tools.classfile.InnerClasses_attribute;
+import com.sun.tools.classfile.LineNumberTable_attribute;
+import com.sun.tools.classfile.LocalVariableTable_attribute;
+import com.sun.tools.classfile.LocalVariableTypeTable_attribute;
+import com.sun.tools.classfile.ModuleExportTable_attribute;
+import com.sun.tools.classfile.ModuleMemberTable_attribute;
+import com.sun.tools.classfile.Module_attribute;
+import com.sun.tools.classfile.RuntimeInvisibleAnnotations_attribute;
+import com.sun.tools.classfile.RuntimeInvisibleParameterAnnotations_attribute;
+import com.sun.tools.classfile.RuntimeVisibleAnnotations_attribute;
+import com.sun.tools.classfile.RuntimeVisibleParameterAnnotations_attribute;
+import com.sun.tools.classfile.Signature_attribute;
+import com.sun.tools.classfile.SourceDebugExtension_attribute;
+import com.sun.tools.classfile.SourceFile_attribute;
+import com.sun.tools.classfile.SourceID_attribute;
+import com.sun.tools.classfile.StackMapTable_attribute;
+import com.sun.tools.classfile.StackMap_attribute;
+import com.sun.tools.classfile.Synthetic_attribute;
+
+import static com.sun.tools.classfile.AccessFlags.*;
+
+/*
+ *  A writer for writing Attributes as text.
+ *
+ *  <p><b>This is NOT part of any API supported by Sun Microsystems.  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.</b>
+ */
+public class AttributeWriter extends BasicWriter
+        implements Attribute.Visitor<Void,Void>
+{
+    static AttributeWriter instance(Context context) {
+        AttributeWriter instance = context.get(AttributeWriter.class);
+        if (instance == null)
+            instance = new AttributeWriter(context);
+        return instance;
+    }
+
+    protected AttributeWriter(Context context) {
+        super(context);
+        context.put(AttributeWriter.class, this);
+        annotationWriter = AnnotationWriter.instance(context);
+        codeWriter = CodeWriter.instance(context);
+        constantWriter = ConstantWriter.instance(context);
+        options = Options.instance(context);
+    }
+
+    public void write(Object owner, Attribute attr, ConstantPool constant_pool) {
+        if (attr != null) {
+            // null checks
+            owner.getClass();
+            constant_pool.getClass();
+            this.constant_pool = constant_pool;
+            this.owner = owner;
+            attr.accept(this, null);
+        }
+    }
+
+    public void write(Object owner, Attributes attrs, ConstantPool constant_pool) {
+        if (attrs != null) {
+            // null checks
+            owner.getClass();
+            constant_pool.getClass();
+            this.constant_pool = constant_pool;
+            this.owner = owner;
+            for (Attribute attr: attrs)
+                attr.accept(this, null);
+        }
+    }
+
+    public Void visitDefault(DefaultAttribute attr, Void ignore) {
+        byte[] data = attr.info;
+        int i = 0;
+        int j = 0;
+        print("  ");
+        try {
+            print(attr.getName(constant_pool));
+        } catch (ConstantPoolException e) {
+            report(e);
+            print("attribute name = #" + attr.attribute_name_index);
+        }
+        print(": ");
+        println("length = 0x" + toHex(attr.info.length));
+
+        print("   ");
+
+        while (i < data.length) {
+            print(toHex(data[i], 2));
+
+            j++;
+            if (j == 16) {
+                println();
+                print("   ");
+                j = 0;
+            } else {
+                print(" ");
+            }
+            i++;
+        }
+        println();
+        return null;
+    }
+
+    public Void visitAnnotationDefault(AnnotationDefault_attribute attr, Void ignore) {
+        println("  AnnotationDefault: ");
+        print("    default_value: ");
+        annotationWriter.write(attr.default_value);
+        return null;
+    }
+
+    public Void visitCharacterRangeTable(CharacterRangeTable_attribute attr, Void ignore) {
+        print("  CharacterRangeTable: ");
+        for (int i = 0; i < attr.character_range_table.length; i++) {
+            CharacterRangeTable_attribute.Entry e = attr.character_range_table[i];
+            print("    " + e.start_pc + ", " +
+                    e.end_pc + ", " +
+                    Integer.toHexString(e.character_range_start) + ", " +
+                    Integer.toHexString(e.character_range_end) + ", " +
+                    Integer.toHexString(e.flags) +
+                    "\t// ");
+            print(e.start_pc + ", " +
+                    e.end_pc + ", " +
+                    (e.character_range_start >> 10) + ":" + (e.character_range_start & 0x3ff) + ", " +
+                    (e.character_range_end >> 10) + ":" + (e.character_range_end & 0x3ff));
+            if ((e.flags & CharacterRangeTable_attribute.CRT_STATEMENT) != 0)
+                print(", statement");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_BLOCK) != 0)
+                print(", block");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_ASSIGNMENT) != 0)
+                print(", assignment");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_FLOW_CONTROLLER) != 0)
+                print(", flow-controller");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_FLOW_TARGET) != 0)
+                print(", flow-target");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_INVOKE) != 0)
+                print(", invoke");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_CREATE) != 0)
+                print(", create");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_BRANCH_TRUE) != 0)
+                print(", branch-true");
+            if ((e.flags & CharacterRangeTable_attribute.CRT_BRANCH_FALSE) != 0)
+                print(", branch-false");
+
+
+
+        }
+        return null;
+    }
+
+    public Void visitCode(Code_attribute attr, Void ignore) {
+        codeWriter.write(attr, constant_pool);
+        println();
+        return null;
+    }
+
+    public Void visitCompilationID(CompilationID_attribute attr, Void ignore) {
+        constantWriter.write(attr.compilationID_index);
+        return null;
+    }
+
+    public Void visitConstantValue(ConstantValue_attribute attr, Void ignore) {
+        if (options.compat) // BUG 6622216 javap names some attributes incorrectly
+            print("  Constant value: ");
+        else
+            print("  ConstantValue: ");
+        constantWriter.write(attr.constantvalue_index);
+        if (!options.compat) // BUG 6622232 javap gets whitespace confused
+            println();
+        return null;
+    }
+
+    public Void visitDeprecated(Deprecated_attribute attr, Void ignore) {
+        if (!(options.compat && owner instanceof Field)) // BUG 6622232 javap gets whitespace confused
+            print("  ");
+        println("Deprecated: true");
+        return null;
+    }
+
+    public Void visitEnclosingMethod(EnclosingMethod_attribute attr, Void ignore) {
+        print("  EnclosingMethod: #" + attr.class_index + ".#" + attr.method_index
+                + "\t// " + getJavaClassName(attr));
+        if (attr.method_index != 0)
+            print("." + getMethodName(attr));
+        println();
+        return null;
+    }
+
+    private String getJavaClassName(EnclosingMethod_attribute a) {
+        try {
+            return getJavaName(a.getClassName(constant_pool));
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    private String getMethodName(EnclosingMethod_attribute a) {
+        try {
+            return a.getMethodName(constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitExceptions(Exceptions_attribute attr, Void ignore) {
+        println("  Exceptions: ");
+        print("   throws ");
+        for (int i = 0; i < attr.number_of_exceptions; i++) {
+            if (i > 0)
+                print(", ");
+            print(getJavaException(attr, i));
+        }
+        if (!options.compat) // BUG 6622232 javap gets whitespace confused
+            println();
+        return null;
+    }
+
+    String getJavaException(Exceptions_attribute attr, int index) {
+        try {
+            return getJavaName(attr.getException(index, constant_pool));
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitInnerClasses(InnerClasses_attribute attr, Void ignore) {
+        boolean first = true;
+        if (options.compat) {
+            writeInnerClassHeader();
+            first = false;
+        }
+        for (int i = 0 ; i < attr.classes.length; i++) {
+            InnerClasses_attribute.Info info = attr.classes[i];
+            //access
+            AccessFlags access_flags = info.inner_class_access_flags;
+            if (options.compat) {
+                // BUG 6622215: javap ignores certain relevant access flags
+                access_flags = access_flags.ignore(ACC_STATIC | ACC_PROTECTED | ACC_PRIVATE | ACC_INTERFACE | ACC_SYNTHETIC | ACC_ENUM);
+                // BUG 6622232: javap gets whitespace confused
+                print("   ");
+            }
+            if (options.checkAccess(access_flags)) {
+                if (first) {
+                    writeInnerClassHeader();
+                    first = false;
+                }
+                if (!options.compat) // BUG 6622232: javap gets whitespace confused
+                    print("   ");
+                for (String name: access_flags.getInnerClassModifiers())
+                    print(name + " ");
+                if (info.inner_name_index!=0) {
+                    print("#" + info.inner_name_index + "= ");
+                }
+                print("#" + info.inner_class_info_index);
+                if (info.outer_class_info_index != 0) {
+                    print(" of #" + info.outer_class_info_index);
+                }
+                print("; //");
+                if (info.inner_name_index != 0) {
+                    print(getInnerName(constant_pool, info) + "=");
+                }
+                constantWriter.write(info.inner_class_info_index);
+                if (info.outer_class_info_index != 0) {
+                    print(" of ");
+                    constantWriter.write(info.outer_class_info_index);
+                }
+                println();
+            }
+        }
+        return null;
+    }
+
+    String getInnerName(ConstantPool constant_pool, InnerClasses_attribute.Info info) {
+        try {
+            return info.getInnerName(constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    private void writeInnerClassHeader() {
+        print("  ");
+        if (options.compat) // BUG 6622216: javap names some attributes incorrectly
+            print("InnerClass");
+        else
+            print("InnerClasses");
+        println(": ");
+    }
+
+    public Void visitLineNumberTable(LineNumberTable_attribute attr, Void ignore) {
+        println("  LineNumberTable: ");
+        for (LineNumberTable_attribute.Entry entry: attr.line_number_table) {
+            println("   line " + entry.line_number + ": " + entry.start_pc);
+        }
+        return null;
+    }
+
+    public Void visitLocalVariableTable(LocalVariableTable_attribute attr, Void ignore) {
+        println("  LocalVariableTable: ");
+        println("   Start  Length  Slot  Name   Signature");
+
+        for (LocalVariableTable_attribute.Entry entry : attr.local_variable_table) {
+            Formatter formatter = new Formatter();
+            println(formatter.format("%8d %7d %5d %5s   %s",
+                    entry.start_pc, entry.length, entry.index,
+                    constantWriter.stringValue(entry.name_index),
+                    constantWriter.stringValue(entry.descriptor_index)));
+        }
+        return null;
+    }
+
+    public Void visitLocalVariableTypeTable(LocalVariableTypeTable_attribute attr, Void ignore) {
+        println("  LocalVariableTypeTable: ");
+        println("   Start  Length  Slot  Name   Signature");
+
+        for (LocalVariableTypeTable_attribute.Entry entry : attr.local_variable_table) {
+            Formatter formatter = new Formatter();
+            println(formatter.format("%8d %7d %5d %5s   %s",
+                    entry.start_pc, entry.length, entry.index,
+                    constantWriter.stringValue(entry.name_index),
+                    constantWriter.stringValue(entry.signature_index)));
+        }
+        return null;
+    }
+
+    public Void visitModule(Module_attribute attr, Void ignore) {
+        println("  Module: #" + attr.module_name + "\t// " + getModuleName(attr));
+        return null;
+    }
+
+    String getModuleName(Module_attribute attr) {
+        try {
+            return attr.getModuleName(constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitModuleExportTable(ModuleExportTable_attribute attr, Void ignore) {
+        println("  ModuleExportTable:");
+        println("    Types: (" + attr.export_type_table.length + ")");
+        for (int i = 0; i < attr.export_type_table.length; i++) {
+            println("      #" + attr.export_type_table[i] + "\t// " + getExportTypeName(attr, i));
+        }
+        return null;
+    }
+
+    String getExportTypeName(ModuleExportTable_attribute attr, int index) {
+        try {
+            return attr.getExportTypeName(index, constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitModuleMemberTable(ModuleMemberTable_attribute attr, Void ignore) {
+        println("  ModuleMemberTable:");
+        println("    Packages: (" + attr.package_member_table.length + ")");
+        for (int i = 0; i < attr.package_member_table.length; i++) {
+            println("      #" + attr.package_member_table[i] + "\t// " + getPackageMemberName(attr, i));
+        }
+        return null;
+    }
+
+    String getPackageMemberName(ModuleMemberTable_attribute attr, int index) {
+        try {
+            return attr.getPackageMemberName(index, constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitRuntimeVisibleAnnotations(RuntimeVisibleAnnotations_attribute attr, Void ignore) {
+        println("  RuntimeVisibleAnnotations: ");
+        for (int i = 0; i < attr.annotations.length; i++) {
+            print("    " + i + ": ");
+            annotationWriter.write(attr.annotations[i]);
+            println();
+        }
+        return null;
+    }
+
+    public Void visitRuntimeInvisibleAnnotations(RuntimeInvisibleAnnotations_attribute attr, Void ignore) {
+        println("  RuntimeInvisibleAnnotations: ");
+        for (int i = 0; i < attr.annotations.length; i++) {
+            print("    " + i + ": ");
+            annotationWriter.write(attr.annotations[i]);
+            println();
+        }
+        return null;
+    }
+
+    public Void visitRuntimeVisibleParameterAnnotations(RuntimeVisibleParameterAnnotations_attribute attr, Void ignore) {
+        println("  RuntimeVisibleParameterAnnotations: ");
+        for (int param = 0; param < attr.parameter_annotations.length; param++) {
+            println("    parameter " + param + ": ");
+            for (int i = 0; i < attr.parameter_annotations[param].length; i++) {
+                print("    " + i + ": ");
+                annotationWriter.write(attr.parameter_annotations[param][i]);
+                println();
+            }
+        }
+        return null;
+    }
+
+    public Void visitRuntimeInvisibleParameterAnnotations(RuntimeInvisibleParameterAnnotations_attribute attr, Void ignore) {
+        println("  RuntimeInvisibleParameterAnnotations: ");
+        for (int param = 0; param < attr.parameter_annotations.length; param++) {
+            println("    " + param + ": ");
+            for (int i = 0; i < attr.parameter_annotations[param].length; i++) {
+                print("    " + i + ": ");
+                annotationWriter.write(attr.parameter_annotations[param][i]);
+                println();
+            }
+        }
+        return null;
+    }
+
+    public Void visitSignature(Signature_attribute attr, Void ignore) {
+        println("  Signature: #" + attr.signature_index + "\t// " + getSignature(attr));
+        return null;
+    }
+
+    String getSignature(Signature_attribute info) {
+        try {
+            return info.getSignature(constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitSourceDebugExtension(SourceDebugExtension_attribute attr, Void ignore) {
+        println("  SourceDebugExtension: " + attr.getValue());
+        return null;
+    }
+
+    public Void visitSourceFile(SourceFile_attribute attr, Void ignore) {
+        println("  SourceFile: \"" + getSourceFile(attr) + "\"");
+        return null;
+    }
+
+    private String getSourceFile(SourceFile_attribute attr) {
+        try {
+            return attr.getSourceFile(constant_pool);
+        } catch (ConstantPoolException e) {
+            return report(e);
+        }
+    }
+
+    public Void visitSourceID(SourceID_attribute attr, Void ignore) {
+        constantWriter.write(attr.sourceID_index);
+        return null;
+    }
+
+    public Void visitStackMap(StackMap_attribute attr, Void ignore) {
+        println("  StackMap: number_of_entries = " + attr.number_of_entries);
+
+        StackMapTableWriter w = new StackMapTableWriter();
+        for (StackMapTable_attribute.stack_map_frame entry : attr.entries) {
+            w.write(entry);
+        }
+        println();
+        return null;
+    }
+
+    public Void visitStackMapTable(StackMapTable_attribute attr, Void ignore) {
+        println("  StackMapTable: number_of_entries = " + attr.number_of_entries);
+
+        StackMapTableWriter w = new StackMapTableWriter();
+        for (StackMapTable_attribute.stack_map_frame entry : attr.entries) {
+            w.write(entry);
+        }
+        println();
+        return null;
+    }
+
+    class StackMapTableWriter // also handles CLDC StackMap attributes
+            implements StackMapTable_attribute.stack_map_frame.Visitor<Void,Void> {
+        public void write(StackMapTable_attribute.stack_map_frame frame) {
+            frame.accept(this, null);
+        }
+
+        public Void visit_same_frame(StackMapTable_attribute.same_frame frame, Void p) {
+            printHeader(frame);
+            println(" /* same */");
+            return null;
+        }
+
+        public Void visit_same_locals_1_stack_item_frame(StackMapTable_attribute.same_locals_1_stack_item_frame frame, Void p) {
+            printHeader(frame);
+            println(" /* same_locals_1_stack_item */");
+            printMap("stack", frame.stack);
+            return null;
+        }
+
+        public Void visit_same_locals_1_stack_item_frame_extended(StackMapTable_attribute.same_locals_1_stack_item_frame_extended frame, Void p) {
+            printHeader(frame);
+            println(" /* same_locals_1_stack_item_frame_extended */");
+            println("     offset_delta = " + frame.offset_delta);
+            printMap("stack", frame.stack);
+            return null;
+        }
+
+        public Void visit_chop_frame(StackMapTable_attribute.chop_frame frame, Void p) {
+            printHeader(frame);
+            println(" /* chop */");
+            println("     offset_delta = " + frame.offset_delta);
+            return null;
+        }
+
+        public Void visit_same_frame_extended(StackMapTable_attribute.same_frame_extended frame, Void p) {
+            printHeader(frame);
+            println(" /* same_frame_extended */");
+            println("     offset_delta = " + frame.offset_delta);
+            return null;
+        }
+
+        public Void visit_append_frame(StackMapTable_attribute.append_frame frame, Void p) {
+            printHeader(frame);
+            println(" /* append */");
+            println("     offset_delta = " + frame.offset_delta);
+            printMap("locals", frame.locals);
+            return null;
+        }
+
+        public Void visit_full_frame(StackMapTable_attribute.full_frame frame, Void p) {
+            printHeader(frame);
+            if (frame instanceof StackMap_attribute.stack_map_frame) {
+                println("     offset = " + frame.offset_delta);
+            } else {
+                println(" /* full_frame */");
+                println("     offset_delta = " + frame.offset_delta);
+            }
+            printMap("locals", frame.locals);
+            printMap("stack", frame.stack);
+            return null;
+        }
+
+        void printHeader(StackMapTable_attribute.stack_map_frame frame) {
+            print("   frame_type = " + frame.frame_type);
+        }
+
+        void printMap(String name, StackMapTable_attribute.verification_type_info[] map) {
+            print("     " + name + " = [");
+            for (int i = 0; i < map.length; i++) {
+                StackMapTable_attribute.verification_type_info info = map[i];
+                int tag = info.tag;
+                switch (tag) {
+                    case StackMapTable_attribute.verification_type_info.ITEM_Object:
+                        print(" ");
+                        constantWriter.write(((StackMapTable_attribute.Object_variable_info) info).cpool_index);
+                        break;
+                    case StackMapTable_attribute.verification_type_info.ITEM_Uninitialized:
+                        print(" " + mapTypeName(tag));
+                        print(" " + ((StackMapTable_attribute.Uninitialized_variable_info) info).offset);
+                        break;
+                    default:
+                        print(" " + mapTypeName(tag));
+                }
+                print(i == (map.length - 1) ? " " : ",");
+            }
+            println("]");
+        }
+
+        String mapTypeName(int tag) {
+            switch (tag) {
+            case StackMapTable_attribute.verification_type_info.ITEM_Top:
+                return "top";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Integer:
+                return "int";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Float:
+                return "float";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Long:
+                return "long";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Double:
+                return "double";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Null:
+                return "null";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_UninitializedThis:
+                return "this";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Object:
+                return "CP";
+
+            case StackMapTable_attribute.verification_type_info.ITEM_Uninitialized:
+                return "uninitialized";
+
+            default:
+                report("unrecognized verification_type_info tag: " + tag);
+                return "[tag:" + tag + "]";
+            }
+        }
+    }
+
+    public Void visitSynthetic(Synthetic_attribute attr, Void ignore) {
+        println("Synthetic: true");
+        return null;
+    }
+
+    static String getJavaName(String name) {
+        return name.replace('/', '.');
+    }
+
+    String toHex(byte b, int w) {
+        if (options.compat) // BUG 6622260: javap prints negative bytes incorrectly in hex
+            return toHex((int) b, w);
+        else
+            return toHex(b & 0xff, w);
+    }
+
+    static String toHex(int i) {
+        return Integer.toString(i, 16).toUpperCase();
+    }
+
+    static String toHex(int i, int w) {
+        String s = Integer.toHexString(i).toUpperCase();
+        while (s.length() < w)
+            s = "0" + s;
+        return s.toUpperCase();
+    }
+
+    private AnnotationWriter annotationWriter;
+    private CodeWriter codeWriter;
+    private ConstantWriter constantWriter;
+    private Options options;
+
+    private ConstantPool constant_pool;
+    private Object owner;
+}