jjg@46: /*
xdono@54: * Copyright 2007-2008 Sun Microsystems, Inc. All Rights Reserved.
jjg@46: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@46: *
jjg@46: * This code is free software; you can redistribute it and/or modify it
jjg@46: * under the terms of the GNU General Public License version 2 only, as
jjg@46: * published by the Free Software Foundation. Sun designates this
jjg@46: * particular file as subject to the "Classpath" exception as provided
jjg@46: * by Sun in the LICENSE file that accompanied this code.
jjg@46: *
jjg@46: * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@46: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@46: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
jjg@46: * version 2 for more details (a copy is included in the LICENSE file that
jjg@46: * accompanied this code).
jjg@46: *
jjg@46: * You should have received a copy of the GNU General Public License version
jjg@46: * 2 along with this work; if not, write to the Free Software Foundation,
jjg@46: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@46: *
jjg@46: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
jjg@46: * CA 95054 USA or visit www.sun.com if you need additional information or
jjg@46: * have any questions.
jjg@46: */
jjg@46:
jjg@46: package com.sun.tools.javap;
jjg@46:
jjg@46: import com.sun.tools.classfile.ClassFile;
jjg@46: import com.sun.tools.classfile.ConstantPool;
jjg@46: import com.sun.tools.classfile.ConstantPoolException;
jjg@46:
jjg@46: import static com.sun.tools.classfile.ConstantPool.*;
jjg@46:
jjg@46: /*
jjg@46: * Write a constant pool entry.
jjg@46: *
jjg@46: *
This is NOT part of any API supported by Sun Microsystems. If
jjg@46: * you write code that depends on this, you do so at your own risk.
jjg@46: * This code and its internal interfaces are subject to change or
jjg@46: * deletion without notice.
jjg@46: */
jjg@46: public class ConstantWriter extends BasicWriter {
jjg@300: public static ConstantWriter instance(Context context) {
jjg@46: ConstantWriter instance = context.get(ConstantWriter.class);
jjg@46: if (instance == null)
jjg@46: instance = new ConstantWriter(context);
jjg@46: return instance;
jjg@46: }
jjg@46:
jjg@46: protected ConstantWriter(Context context) {
jjg@46: super(context);
jjg@46: context.put(ConstantWriter.class, this);
jjg@46: classWriter = ClassWriter.instance(context);
jjg@46: options = Options.instance(context);
jjg@46: }
jjg@46:
jjg@300: protected void writeConstantPool() {
jjg@300: ConstantPool constant_pool = classWriter.getClassFile().constant_pool;
jjg@300: writeConstantPool(constant_pool);
jjg@300: }
jjg@300:
jjg@300: protected void writeConstantPool(ConstantPool constant_pool) {
jjg@46: ConstantPool.Visitor v = new ConstantPool.Visitor() {
jjg@46: public Integer visitClass(CONSTANT_Class_info info, Void p) {
jjg@354: print("#" + info.name_index);
jjg@348: tab();
jjg@348: println("// " + stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitDouble(CONSTANT_Double_info info, Void p) {
jjg@354: println(stringValue(info));
jjg@46: return 2;
jjg@46: }
jjg@46:
jjg@46: public Integer visitFieldref(CONSTANT_Fieldref_info info, Void p) {
jjg@354: print("#" + info.class_index + ".#" + info.name_and_type_index);
jjg@348: tab();
jjg@348: println("// " + stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitFloat(CONSTANT_Float_info info, Void p) {
jjg@354: println(stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitInteger(CONSTANT_Integer_info info, Void p) {
jjg@354: println(stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) {
jjg@354: print("#" + info.class_index + ".#" + info.name_and_type_index);
jjg@348: tab();
jjg@348: println("// " + stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitLong(CONSTANT_Long_info info, Void p) {
jjg@354: println(stringValue(info));
jjg@46: return 2;
jjg@46: }
jjg@46:
jjg@46: public Integer visitNameAndType(CONSTANT_NameAndType_info info, Void p) {
jjg@354: print("#" + info.name_index + ":#" + info.type_index);
jjg@348: tab();
jjg@348: println("// " + stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitMethodref(CONSTANT_Methodref_info info, Void p) {
jjg@354: print("#" + info.class_index + ".#" + info.name_and_type_index);
jjg@348: tab();
jjg@348: println("// " + stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitString(CONSTANT_String_info info, Void p) {
jjg@354: print("#" + info.string_index);
jjg@348: tab();
jjg@348: println("// " + stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: public Integer visitUtf8(CONSTANT_Utf8_info info, Void p) {
jjg@354: println(stringValue(info));
jjg@46: return 1;
jjg@46: }
jjg@46:
jjg@46: };
jjg@348: println("Constant pool:");
jjg@348: indent(+1);
jjg@348: int width = String.valueOf(constant_pool.size()).length() + 1;
jjg@46: int cpx = 1;
jjg@46: while (cpx < constant_pool.size()) {
jjg@355: print(String.format("%" + width + "s", ("#" + cpx)));
jjg@46: try {
jjg@46: CPInfo cpInfo = constant_pool.get(cpx);
jjg@355: print(String.format(" = %-18s ", cpTagName(cpInfo)));
jjg@46: cpx += cpInfo.accept(v, null);
jjg@46: } catch (ConstantPool.InvalidIndex ex) {
jjg@348: // should not happen
jjg@46: }
jjg@46: }
jjg@348: indent(-1);
jjg@46: }
jjg@46:
jjg@300: protected void write(int cpx) {
jjg@46: ClassFile classFile = classWriter.getClassFile();
jjg@46: if (cpx == 0) {
jjg@46: print("#0");
jjg@46: return;
jjg@46: }
jjg@46:
jjg@46: CPInfo cpInfo;
jjg@46: try {
jjg@46: cpInfo = classFile.constant_pool.get(cpx);
jjg@46: } catch (ConstantPoolException e) {
jjg@46: print("#" + cpx);
jjg@46: return;
jjg@46: }
jjg@46:
jjg@46: int tag = cpInfo.getTag();
jjg@46: switch (tag) {
jjg@46: case CONSTANT_Methodref:
jjg@46: case CONSTANT_InterfaceMethodref:
jjg@46: case CONSTANT_Fieldref:
jjg@46: // simplify references within this class
jjg@46: CPRefInfo ref = (CPRefInfo) cpInfo;
jjg@46: try {
jjg@46: if (ref.class_index == classFile.this_class)
jjg@46: cpInfo = classFile.constant_pool.get(ref.name_and_type_index);
jjg@46: } catch (ConstantPool.InvalidIndex e) {
jjg@46: // ignore, for now
jjg@46: }
jjg@46: }
jjg@46: print(tagName(tag) + " " + stringValue(cpInfo));
jjg@46: }
jjg@46:
jjg@355: String cpTagName(CPInfo cpInfo) {
jjg@355: String n = cpInfo.getClass().getSimpleName();
jjg@355: return n.replace("CONSTANT_", "").replace("_info", "");
jjg@355: }
jjg@355:
jjg@46: String tagName(int tag) {
jjg@46: switch (tag) {
jjg@46: case CONSTANT_Utf8:
jjg@355: return "Utf8";
jjg@46: case CONSTANT_Integer:
jjg@46: return "int";
jjg@46: case CONSTANT_Float:
jjg@46: return "float";
jjg@46: case CONSTANT_Long:
jjg@46: return "long";
jjg@46: case CONSTANT_Double:
jjg@46: return "double";
jjg@46: case CONSTANT_Class:
jjg@46: return "class";
jjg@46: case CONSTANT_String:
jjg@46: return "String";
jjg@46: case CONSTANT_Fieldref:
jjg@46: return "Field";
jjg@46: case CONSTANT_Methodref:
jjg@46: return "Method";
jjg@46: case CONSTANT_InterfaceMethodref:
jjg@46: return "InterfaceMethod";
jjg@46: case CONSTANT_NameAndType:
jjg@46: return "NameAndType";
jjg@46: default:
jjg@355: return "(unknown tag)";
jjg@46: }
jjg@46: }
jjg@46:
jjg@46: String stringValue(int constant_pool_index) {
jjg@46: ClassFile classFile = classWriter.getClassFile();
jjg@46: try {
jjg@46: return stringValue(classFile.constant_pool.get(constant_pool_index));
jjg@46: } catch (ConstantPool.InvalidIndex e) {
jjg@46: return report(e);
jjg@46: }
jjg@46: }
jjg@46:
jjg@46: String stringValue(CPInfo cpInfo) {
jjg@46: return stringValueVisitor.visit(cpInfo);
jjg@46: }
jjg@46:
jjg@46: StringValueVisitor stringValueVisitor = new StringValueVisitor();
jjg@46:
jjg@46: private class StringValueVisitor implements ConstantPool.Visitor {
jjg@46: public String visit(CPInfo info) {
jjg@46: return info.accept(this, null);
jjg@46: }
jjg@46:
jjg@46: public String visitClass(CONSTANT_Class_info info, Void p) {
jjg@46: return getCheckedName(info);
jjg@46: }
jjg@46:
jjg@46: String getCheckedName(CONSTANT_Class_info info) {
jjg@46: try {
jjg@46: return checkName(info.getName());
jjg@46: } catch (ConstantPoolException e) {
jjg@46: return report(e);
jjg@46: }
jjg@46: }
jjg@46:
jjg@46: public String visitDouble(CONSTANT_Double_info info, Void p) {
jjg@46: return info.value + "d";
jjg@46: }
jjg@46:
jjg@46: public String visitFieldref(CONSTANT_Fieldref_info info, Void p) {
jjg@46: return visitRef(info, p);
jjg@46: }
jjg@46:
jjg@46: public String visitFloat(CONSTANT_Float_info info, Void p) {
jjg@46: return info.value + "f";
jjg@46: }
jjg@46:
jjg@46: public String visitInteger(CONSTANT_Integer_info info, Void p) {
jjg@46: return String.valueOf(info.value);
jjg@46: }
jjg@46:
jjg@46: public String visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info info, Void p) {
jjg@46: return visitRef(info, p);
jjg@46: }
jjg@46:
jjg@46: public String visitLong(CONSTANT_Long_info info, Void p) {
jjg@46: return info.value + "l";
jjg@46: }
jjg@46:
jjg@46: public String visitNameAndType(CONSTANT_NameAndType_info info, Void p) {
jjg@46: return getCheckedName(info) + ":" + getType(info);
jjg@46: }
jjg@46:
jjg@46: String getCheckedName(CONSTANT_NameAndType_info info) {
jjg@46: try {
jjg@46: return checkName(info.getName());
jjg@46: } catch (ConstantPoolException e) {
jjg@46: return report(e);
jjg@46: }
jjg@46: }
jjg@46:
jjg@46: String getType(CONSTANT_NameAndType_info info) {
jjg@46: try {
jjg@46: return info.getType();
jjg@46: } catch (ConstantPoolException e) {
jjg@46: return report(e);
jjg@46: }
jjg@46: }
jjg@46:
jjg@46: public String visitMethodref(CONSTANT_Methodref_info info, Void p) {
jjg@46: return visitRef(info, p);
jjg@46: }
jjg@46:
jjg@46: public String visitString(CONSTANT_String_info info, Void p) {
jjg@46: try {
jjg@46: ClassFile classFile = classWriter.getClassFile();
jjg@46: int string_index = info.string_index;
jjg@46: return stringValue(classFile.constant_pool.getUTF8Info(string_index));
jjg@46: } catch (ConstantPoolException e) {
jjg@46: return report(e);
jjg@46: }
jjg@46: }
jjg@46:
jjg@46: public String visitUtf8(CONSTANT_Utf8_info info, Void p) {
jjg@46: String s = info.value;
jjg@46: StringBuilder sb = new StringBuilder();
jjg@46: for (int i = 0; i < s.length(); i++) {
jjg@46: char c = s.charAt(i);
jjg@46: switch (c) {
jjg@46: case '\t':
jjg@46: sb.append('\\').append('t');
jjg@46: break;
jjg@46: case '\n':
jjg@46: sb.append('\\').append('n');
jjg@46: break;
jjg@46: case '\r':
jjg@46: sb.append('\\').append('r');
jjg@46: break;
jjg@46: case '\"':
jjg@46: sb.append('\\').append('\"');
jjg@46: break;
jjg@46: default:
jjg@46: sb.append(c);
jjg@46: }
jjg@46: }
jjg@46: return sb.toString();
jjg@46: }
jjg@46:
jjg@46: String visitRef(CPRefInfo info, Void p) {
jjg@46: String cn = getCheckedClassName(info);
jjg@46: String nat;
jjg@46: try {
jjg@46: nat = stringValue(info.getNameAndTypeInfo());
jjg@46: } catch (ConstantPoolException e) {
jjg@46: nat = report(e);
jjg@46: }
jjg@46: return cn + "." + nat;
jjg@46: }
jjg@46:
jjg@46: String getCheckedClassName(CPRefInfo info) {
jjg@46: try {
jjg@46: return checkName(info.getClassName());
jjg@46: } catch (ConstantPoolException e) {
jjg@46: return report(e);
jjg@46: }
jjg@46: }
jjg@46: }
jjg@46:
jjg@46:
jjg@46: /* If name is a valid binary name, return it; otherwise quote it. */
jjg@46: private static String checkName(String name) {
jjg@46: if (name == null)
jjg@46: return "null";
jjg@46:
jjg@46: int len = name.length();
jjg@46: if (len == 0)
jjg@46: return "\"\"";
jjg@46:
jjg@46: int cc = '/';
jjg@46: int cp;
jjg@46: for (int k = 0; k < len; k += Character.charCount(cp)) {
jjg@46: cp = name.codePointAt(k);
jjg@46: if ((cc == '/' && !Character.isJavaIdentifierStart(cp))
jjg@46: || (cp != '/' && !Character.isJavaIdentifierPart(cp))) {
jrose@267: return "\"" + addEscapes(name) + "\"";
jjg@46: }
jjg@46: cc = cp;
jjg@46: }
jjg@46:
jjg@46: return name;
jjg@46: }
jjg@46:
jrose@267: /* If name requires escapes, put them in, so it can be a string body. */
jrose@267: private static String addEscapes(String name) {
jrose@267: String esc = "\\\"\n\t";
jrose@267: String rep = "\\\"nt";
jrose@267: StringBuilder buf = null;
jrose@267: int nextk = 0;
jrose@267: int len = name.length();
jrose@267: for (int k = 0; k < len; k++) {
jrose@267: char cp = name.charAt(k);
jrose@267: int n = esc.indexOf(cp);
jrose@267: if (n >= 0) {
jrose@267: if (buf == null)
jrose@267: buf = new StringBuilder(len * 2);
jrose@267: if (nextk < k)
jrose@267: buf.append(name, nextk, k);
jrose@267: buf.append('\\');
jrose@267: buf.append(rep.charAt(n));
jrose@267: nextk = k+1;
jrose@267: }
jrose@267: }
jrose@267: if (buf == null)
jrose@267: return name;
jrose@267: if (nextk < len)
jrose@267: buf.append(name, nextk, len);
jrose@267: return buf.toString();
jrose@267: }
jrose@267:
jjg@46: private ClassWriter classWriter;
jjg@46: private Options options;
jjg@46: }