455 lines
15 KiB
Java
455 lines
15 KiB
Java
/*
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* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.javap;
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import com.sun.tools.classfile.ClassFile;
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import com.sun.tools.classfile.ConstantPool;
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import com.sun.tools.classfile.ConstantPoolException;
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import static com.sun.tools.classfile.ConstantPool.*;
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/*
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* Write a constant pool entry.
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*
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* <p><b>This is NOT part of any supported API.
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* If you write code that depends on this, you do so at your own risk.
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* This code and its internal interfaces are subject to change or
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* deletion without notice.</b>
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*/
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public class ConstantWriter extends BasicWriter {
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public static ConstantWriter instance(Context context) {
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ConstantWriter instance = context.get(ConstantWriter.class);
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if (instance == null)
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instance = new ConstantWriter(context);
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return instance;
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}
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protected ConstantWriter(Context context) {
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super(context);
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context.put(ConstantWriter.class, this);
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classWriter = ClassWriter.instance(context);
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options = Options.instance(context);
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}
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protected void writeConstantPool() {
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ConstantPool constant_pool = classWriter.getClassFile().constant_pool;
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writeConstantPool(constant_pool);
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}
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protected void writeConstantPool(ConstantPool constant_pool) {
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ConstantPool.Visitor<Integer, Void> v = new ConstantPool.Visitor<Integer,Void>() {
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public Integer visitClass(CONSTANT_Class_info info, Void p) {
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print("#" + info.name_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitDouble(CONSTANT_Double_info info, Void p) {
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println(stringValue(info));
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return 2;
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}
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public Integer visitFieldref(CONSTANT_Fieldref_info info, Void p) {
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print("#" + info.class_index + ".#" + info.name_and_type_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitFloat(CONSTANT_Float_info info, Void p) {
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println(stringValue(info));
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return 1;
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}
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public Integer visitInteger(CONSTANT_Integer_info info, Void p) {
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println(stringValue(info));
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return 1;
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}
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public Integer visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) {
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print("#" + info.class_index + ".#" + info.name_and_type_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, Void p) {
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print("#" + info.bootstrap_method_attr_index + ":#" + info.name_and_type_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitLong(CONSTANT_Long_info info, Void p) {
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println(stringValue(info));
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return 2;
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}
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public Integer visitNameAndType(CONSTANT_NameAndType_info info, Void p) {
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print("#" + info.name_index + ":#" + info.type_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitMethodref(CONSTANT_Methodref_info info, Void p) {
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print("#" + info.class_index + ".#" + info.name_and_type_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitMethodHandle(CONSTANT_MethodHandle_info info, Void p) {
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print("#" + info.reference_kind.tag + ":#" + info.reference_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitMethodType(CONSTANT_MethodType_info info, Void p) {
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print("#" + info.descriptor_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitString(CONSTANT_String_info info, Void p) {
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print("#" + info.string_index);
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tab();
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println("// " + stringValue(info));
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return 1;
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}
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public Integer visitUtf8(CONSTANT_Utf8_info info, Void p) {
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println(stringValue(info));
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return 1;
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}
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};
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println("Constant pool:");
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indent(+1);
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int width = String.valueOf(constant_pool.size()).length() + 1;
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int cpx = 1;
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while (cpx < constant_pool.size()) {
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print(String.format("%" + width + "s", ("#" + cpx)));
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try {
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CPInfo cpInfo = constant_pool.get(cpx);
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print(String.format(" = %-18s ", cpTagName(cpInfo)));
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cpx += cpInfo.accept(v, null);
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} catch (ConstantPool.InvalidIndex ex) {
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// should not happen
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}
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}
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indent(-1);
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}
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protected void write(int cpx) {
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ClassFile classFile = classWriter.getClassFile();
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if (cpx == 0) {
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print("#0");
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return;
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}
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CPInfo cpInfo;
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try {
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cpInfo = classFile.constant_pool.get(cpx);
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} catch (ConstantPoolException e) {
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print("#" + cpx);
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return;
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}
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int tag = cpInfo.getTag();
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switch (tag) {
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case CONSTANT_Methodref:
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case CONSTANT_InterfaceMethodref:
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case CONSTANT_Fieldref:
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// simplify references within this class
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CPRefInfo ref = (CPRefInfo) cpInfo;
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try {
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if (ref.class_index == classFile.this_class)
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cpInfo = classFile.constant_pool.get(ref.name_and_type_index);
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} catch (ConstantPool.InvalidIndex e) {
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// ignore, for now
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}
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}
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print(tagName(tag) + " " + stringValue(cpInfo));
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}
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String cpTagName(CPInfo cpInfo) {
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String n = cpInfo.getClass().getSimpleName();
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return n.replace("CONSTANT_", "").replace("_info", "");
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}
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String tagName(int tag) {
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switch (tag) {
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case CONSTANT_Utf8:
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return "Utf8";
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case CONSTANT_Integer:
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return "int";
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case CONSTANT_Float:
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return "float";
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case CONSTANT_Long:
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return "long";
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case CONSTANT_Double:
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return "double";
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case CONSTANT_Class:
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return "class";
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case CONSTANT_String:
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return "String";
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case CONSTANT_Fieldref:
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return "Field";
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case CONSTANT_MethodHandle:
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return "MethodHandle";
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case CONSTANT_MethodType:
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return "MethodType";
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case CONSTANT_Methodref:
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return "Method";
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case CONSTANT_InterfaceMethodref:
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return "InterfaceMethod";
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case CONSTANT_InvokeDynamic:
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return "InvokeDynamic";
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case CONSTANT_NameAndType:
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return "NameAndType";
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default:
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return "(unknown tag " + tag + ")";
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}
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}
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String stringValue(int constant_pool_index) {
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ClassFile classFile = classWriter.getClassFile();
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try {
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return stringValue(classFile.constant_pool.get(constant_pool_index));
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} catch (ConstantPool.InvalidIndex e) {
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return report(e);
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}
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}
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String stringValue(CPInfo cpInfo) {
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return stringValueVisitor.visit(cpInfo);
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}
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StringValueVisitor stringValueVisitor = new StringValueVisitor();
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private class StringValueVisitor implements ConstantPool.Visitor<String, Void> {
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public String visit(CPInfo info) {
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return info.accept(this, null);
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}
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public String visitClass(CONSTANT_Class_info info, Void p) {
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return getCheckedName(info);
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}
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String getCheckedName(CONSTANT_Class_info info) {
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try {
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return checkName(info.getName());
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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public String visitDouble(CONSTANT_Double_info info, Void p) {
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return info.value + "d";
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}
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public String visitFieldref(CONSTANT_Fieldref_info info, Void p) {
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return visitRef(info, p);
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}
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public String visitFloat(CONSTANT_Float_info info, Void p) {
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return info.value + "f";
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}
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public String visitInteger(CONSTANT_Integer_info info, Void p) {
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return String.valueOf(info.value);
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}
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public String visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) {
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return visitRef(info, p);
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}
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public String visitInvokeDynamic(CONSTANT_InvokeDynamic_info info, Void p) {
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try {
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String callee = stringValue(info.getNameAndTypeInfo());
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return "#" + info.bootstrap_method_attr_index + ":" + callee;
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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public String visitLong(CONSTANT_Long_info info, Void p) {
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return info.value + "l";
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}
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public String visitNameAndType(CONSTANT_NameAndType_info info, Void p) {
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return getCheckedName(info) + ":" + getType(info);
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}
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String getCheckedName(CONSTANT_NameAndType_info info) {
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try {
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return checkName(info.getName());
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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String getType(CONSTANT_NameAndType_info info) {
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try {
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return info.getType();
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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public String visitMethodHandle(CONSTANT_MethodHandle_info info, Void p) {
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try {
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return info.reference_kind.name + " " + stringValue(info.getCPRefInfo());
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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public String visitMethodType(CONSTANT_MethodType_info info, Void p) {
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try {
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return info.getType();
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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public String visitMethodref(CONSTANT_Methodref_info info, Void p) {
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return visitRef(info, p);
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}
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public String visitString(CONSTANT_String_info info, Void p) {
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try {
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ClassFile classFile = classWriter.getClassFile();
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int string_index = info.string_index;
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return stringValue(classFile.constant_pool.getUTF8Info(string_index));
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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public String visitUtf8(CONSTANT_Utf8_info info, Void p) {
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String s = info.value;
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < s.length(); i++) {
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char c = s.charAt(i);
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switch (c) {
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case '\t':
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sb.append('\\').append('t');
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break;
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case '\n':
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sb.append('\\').append('n');
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break;
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case '\r':
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sb.append('\\').append('r');
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break;
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case '\"':
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sb.append('\\').append('\"');
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break;
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default:
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sb.append(c);
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}
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}
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return sb.toString();
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}
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String visitRef(CPRefInfo info, Void p) {
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String cn = getCheckedClassName(info);
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String nat;
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try {
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nat = stringValue(info.getNameAndTypeInfo());
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} catch (ConstantPoolException e) {
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nat = report(e);
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}
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return cn + "." + nat;
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}
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String getCheckedClassName(CPRefInfo info) {
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try {
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return checkName(info.getClassName());
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} catch (ConstantPoolException e) {
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return report(e);
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}
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}
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}
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/* If name is a valid binary name, return it; otherwise quote it. */
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private static String checkName(String name) {
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if (name == null)
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return "null";
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int len = name.length();
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if (len == 0)
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return "\"\"";
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int cc = '/';
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int cp;
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for (int k = 0; k < len; k += Character.charCount(cp)) {
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cp = name.codePointAt(k);
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if ((cc == '/' && !Character.isJavaIdentifierStart(cp))
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|| (cp != '/' && !Character.isJavaIdentifierPart(cp))) {
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return "\"" + addEscapes(name) + "\"";
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}
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cc = cp;
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}
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return name;
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}
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/* If name requires escapes, put them in, so it can be a string body. */
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private static String addEscapes(String name) {
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String esc = "\\\"\n\t";
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String rep = "\\\"nt";
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StringBuilder buf = null;
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int nextk = 0;
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int len = name.length();
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for (int k = 0; k < len; k++) {
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char cp = name.charAt(k);
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int n = esc.indexOf(cp);
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if (n >= 0) {
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if (buf == null)
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buf = new StringBuilder(len * 2);
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if (nextk < k)
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buf.append(name, nextk, k);
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buf.append('\\');
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buf.append(rep.charAt(n));
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nextk = k+1;
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}
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}
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if (buf == null)
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return name;
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if (nextk < len)
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buf.append(name, nextk, len);
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return buf.toString();
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}
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private ClassWriter classWriter;
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private Options options;
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}
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