| /* |
| * Copyright (c) 2007, 2016, 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.javap; |
| |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.ConstantPool; |
| import com.sun.tools.classfile.ConstantPoolException; |
| |
| import static com.sun.tools.classfile.ConstantPool.*; |
| |
| /* |
| * Write a constant pool entry. |
| * |
| * <p><b>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.</b> |
| */ |
| public class ConstantWriter extends BasicWriter { |
| public static ConstantWriter instance(Context context) { |
| ConstantWriter instance = context.get(ConstantWriter.class); |
| if (instance == null) |
| instance = new ConstantWriter(context); |
| return instance; |
| } |
| |
| protected ConstantWriter(Context context) { |
| super(context); |
| context.put(ConstantWriter.class, this); |
| classWriter = ClassWriter.instance(context); |
| options = Options.instance(context); |
| } |
| |
| protected void writeConstantPool() { |
| ConstantPool constant_pool = classWriter.getClassFile().constant_pool; |
| writeConstantPool(constant_pool); |
| } |
| |
| protected void writeConstantPool(ConstantPool constant_pool) { |
| ConstantPool.Visitor<Integer, Void> v = new ConstantPool.Visitor<Integer,Void>() { |
| public Integer visitClass(CONSTANT_Class_info info, Void p) { |
| print("#" + info.name_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitDouble(CONSTANT_Double_info info, Void p) { |
| println(stringValue(info)); |
| return 2; |
| } |
| |
| public Integer visitFieldref(CONSTANT_Fieldref_info info, Void p) { |
| print("#" + info.class_index + ".#" + info.name_and_type_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitFloat(CONSTANT_Float_info info, Void p) { |
| println(stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitInteger(CONSTANT_Integer_info info, Void p) { |
| println(stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) { |
| print("#" + info.class_index + ".#" + info.name_and_type_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, Void p) { |
| print("#" + info.bootstrap_method_attr_index + ":#" + info.name_and_type_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitLong(CONSTANT_Long_info info, Void p) { |
| println(stringValue(info)); |
| return 2; |
| } |
| |
| public Integer visitMethodref(CONSTANT_Methodref_info info, Void p) { |
| print("#" + info.class_index + ".#" + info.name_and_type_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitMethodHandle(CONSTANT_MethodHandle_info info, Void p) { |
| print(info.reference_kind.tag + ":#" + info.reference_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitMethodType(CONSTANT_MethodType_info info, Void p) { |
| print("#" + info.descriptor_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitModule(CONSTANT_Module_info info, Void p) { |
| print("#" + info.name_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitNameAndType(CONSTANT_NameAndType_info info, Void p) { |
| print("#" + info.name_index + ":#" + info.type_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitPackage(CONSTANT_Package_info info, Void p) { |
| print("#" + info.name_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitString(CONSTANT_String_info info, Void p) { |
| print("#" + info.string_index); |
| tab(); |
| println("// " + stringValue(info)); |
| return 1; |
| } |
| |
| public Integer visitUtf8(CONSTANT_Utf8_info info, Void p) { |
| println(stringValue(info)); |
| return 1; |
| } |
| |
| }; |
| println("Constant pool:"); |
| indent(+1); |
| int width = String.valueOf(constant_pool.size()).length() + 1; |
| int cpx = 1; |
| while (cpx < constant_pool.size()) { |
| print(String.format("%" + width + "s", ("#" + cpx))); |
| try { |
| CPInfo cpInfo = constant_pool.get(cpx); |
| print(String.format(" = %-18s ", cpTagName(cpInfo))); |
| cpx += cpInfo.accept(v, null); |
| } catch (ConstantPool.InvalidIndex ex) { |
| // should not happen |
| } |
| } |
| indent(-1); |
| } |
| |
| protected void write(int cpx) { |
| ClassFile classFile = classWriter.getClassFile(); |
| if (cpx == 0) { |
| print("#0"); |
| return; |
| } |
| |
| CPInfo cpInfo; |
| try { |
| cpInfo = classFile.constant_pool.get(cpx); |
| } catch (ConstantPoolException e) { |
| print("#" + cpx); |
| return; |
| } |
| |
| int tag = cpInfo.getTag(); |
| switch (tag) { |
| case CONSTANT_Methodref: |
| case CONSTANT_InterfaceMethodref: |
| case CONSTANT_Fieldref: |
| // simplify references within this class |
| CPRefInfo ref = (CPRefInfo) cpInfo; |
| try { |
| if (ref.class_index == classFile.this_class) |
| cpInfo = classFile.constant_pool.get(ref.name_and_type_index); |
| } catch (ConstantPool.InvalidIndex e) { |
| // ignore, for now |
| } |
| } |
| print(tagName(tag) + " " + stringValue(cpInfo)); |
| } |
| |
| String cpTagName(CPInfo cpInfo) { |
| String n = cpInfo.getClass().getSimpleName(); |
| return n.replace("CONSTANT_", "").replace("_info", ""); |
| } |
| |
| String tagName(int tag) { |
| switch (tag) { |
| case CONSTANT_Utf8: |
| return "Utf8"; |
| case CONSTANT_Integer: |
| return "int"; |
| case CONSTANT_Float: |
| return "float"; |
| case CONSTANT_Long: |
| return "long"; |
| case CONSTANT_Double: |
| return "double"; |
| case CONSTANT_Class: |
| return "class"; |
| case CONSTANT_String: |
| return "String"; |
| case CONSTANT_Fieldref: |
| return "Field"; |
| case CONSTANT_MethodHandle: |
| return "MethodHandle"; |
| case CONSTANT_MethodType: |
| return "MethodType"; |
| case CONSTANT_Methodref: |
| return "Method"; |
| case CONSTANT_InterfaceMethodref: |
| return "InterfaceMethod"; |
| case CONSTANT_InvokeDynamic: |
| return "InvokeDynamic"; |
| case CONSTANT_NameAndType: |
| return "NameAndType"; |
| default: |
| return "(unknown tag " + tag + ")"; |
| } |
| } |
| |
| String stringValue(int constant_pool_index) { |
| ClassFile classFile = classWriter.getClassFile(); |
| try { |
| return stringValue(classFile.constant_pool.get(constant_pool_index)); |
| } catch (ConstantPool.InvalidIndex e) { |
| return report(e); |
| } |
| } |
| |
| String stringValue(CPInfo cpInfo) { |
| return stringValueVisitor.visit(cpInfo); |
| } |
| |
| StringValueVisitor stringValueVisitor = new StringValueVisitor(); |
| |
| private class StringValueVisitor implements ConstantPool.Visitor<String, Void> { |
| public String visit(CPInfo info) { |
| return info.accept(this, null); |
| } |
| |
| public String visitClass(CONSTANT_Class_info info, Void p) { |
| return getCheckedName(info); |
| } |
| |
| String getCheckedName(CONSTANT_Class_info info) { |
| try { |
| return checkName(info.getName()); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitDouble(CONSTANT_Double_info info, Void p) { |
| return info.value + "d"; |
| } |
| |
| public String visitFieldref(CONSTANT_Fieldref_info info, Void p) { |
| return visitRef(info, p); |
| } |
| |
| public String visitFloat(CONSTANT_Float_info info, Void p) { |
| return info.value + "f"; |
| } |
| |
| public String visitInteger(CONSTANT_Integer_info info, Void p) { |
| return String.valueOf(info.value); |
| } |
| |
| public String visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) { |
| return visitRef(info, p); |
| } |
| |
| public String visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, Void p) { |
| try { |
| String callee = stringValue(info.getNameAndTypeInfo()); |
| return "#" + info.bootstrap_method_attr_index + ":" + callee; |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitLong(CONSTANT_Long_info info, Void p) { |
| return info.value + "l"; |
| } |
| |
| public String visitModule(CONSTANT_Module_info info, Void p) { |
| try { |
| return checkName(info.getName()); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitNameAndType(CONSTANT_NameAndType_info info, Void p) { |
| return getCheckedName(info) + ":" + getType(info); |
| } |
| |
| String getCheckedName(CONSTANT_NameAndType_info info) { |
| try { |
| return checkName(info.getName()); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitPackage(CONSTANT_Package_info info, Void p) { |
| try { |
| return checkName(info.getName()); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| String getType(CONSTANT_NameAndType_info info) { |
| try { |
| return info.getType(); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitMethodHandle(CONSTANT_MethodHandle_info info, Void p) { |
| try { |
| return info.reference_kind + " " + stringValue(info.getCPRefInfo()); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitMethodType(CONSTANT_MethodType_info info, Void p) { |
| try { |
| return info.getType(); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitMethodref(CONSTANT_Methodref_info info, Void p) { |
| return visitRef(info, p); |
| } |
| |
| public String visitString(CONSTANT_String_info info, Void p) { |
| try { |
| ClassFile classFile = classWriter.getClassFile(); |
| int string_index = info.string_index; |
| return stringValue(classFile.constant_pool.getUTF8Info(string_index)); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| |
| public String visitUtf8(CONSTANT_Utf8_info info, Void p) { |
| String s = info.value; |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < s.length(); i++) { |
| char c = s.charAt(i); |
| switch (c) { |
| case '\t': |
| sb.append('\\').append('t'); |
| break; |
| case '\n': |
| sb.append('\\').append('n'); |
| break; |
| case '\r': |
| sb.append('\\').append('r'); |
| break; |
| case '\b': |
| sb.append('\\').append('b'); |
| break; |
| case '\f': |
| sb.append('\\').append('f'); |
| break; |
| case '\"': |
| sb.append('\\').append('\"'); |
| break; |
| case '\'': |
| sb.append('\\').append('\''); |
| break; |
| case '\\': |
| sb.append('\\').append('\\'); |
| break; |
| default: |
| if (Character.isISOControl(c)) { |
| sb.append(String.format("\\u%04x", (int) c)); |
| break; |
| } |
| sb.append(c); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| String visitRef(CPRefInfo info, Void p) { |
| String cn = getCheckedClassName(info); |
| String nat; |
| try { |
| nat = stringValue(info.getNameAndTypeInfo()); |
| } catch (ConstantPoolException e) { |
| nat = report(e); |
| } |
| return cn + "." + nat; |
| } |
| |
| String getCheckedClassName(CPRefInfo info) { |
| try { |
| return checkName(info.getClassName()); |
| } catch (ConstantPoolException e) { |
| return report(e); |
| } |
| } |
| } |
| |
| /* If name is a valid binary name, return it; otherwise quote it. */ |
| private static String checkName(String name) { |
| if (name == null) |
| return "null"; |
| |
| int len = name.length(); |
| if (len == 0) |
| return "\"\""; |
| |
| int cc = '/'; |
| int cp; |
| for (int k = 0; k < len; k += Character.charCount(cp)) { |
| cp = name.codePointAt(k); |
| if ((cc == '/' && !Character.isJavaIdentifierStart(cp)) |
| || (cp != '/' && !Character.isJavaIdentifierPart(cp))) { |
| return "\"" + addEscapes(name) + "\""; |
| } |
| cc = cp; |
| } |
| |
| return name; |
| } |
| |
| /* If name requires escapes, put them in, so it can be a string body. */ |
| private static String addEscapes(String name) { |
| String esc = "\\\"\n\t"; |
| String rep = "\\\"nt"; |
| StringBuilder buf = null; |
| int nextk = 0; |
| int len = name.length(); |
| for (int k = 0; k < len; k++) { |
| char cp = name.charAt(k); |
| int n = esc.indexOf(cp); |
| if (n >= 0) { |
| if (buf == null) |
| buf = new StringBuilder(len * 2); |
| if (nextk < k) |
| buf.append(name, nextk, k); |
| buf.append('\\'); |
| buf.append(rep.charAt(n)); |
| nextk = k+1; |
| } |
| } |
| if (buf == null) |
| return name; |
| if (nextk < len) |
| buf.append(name, nextk, len); |
| return buf.toString(); |
| } |
| |
| private ClassWriter classWriter; |
| private Options options; |
| } |