jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javap/ConstantWriter.java@4868a36f6fd8 (annotated)

src/share/classes/com/sun/tools/javap/ConstantWriter.java@4868a36f6fd8 (annotated)

src/share/classes/com/sun/tools/javap/ConstantWriter.java

Tue, 28 Dec 2010 15:54:52 -0800

author: ohair
date: Tue, 28 Dec 2010 15:54:52 -0800
changeset 798: 4868a36f6fd8
parent 581: f2fdd52e4e87
child 826: 5cf6c432ef2f
permissions: -rw-r--r--

6962318: Update copyright year
Reviewed-by: xdono

 /*
  * Copyright (c) 2007, 2008, 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 visitLong(CONSTANT_Long_info info, Void p) {
                 println(stringValue(info));
                 return 2;
             }
             public Integer visitNameAndType(CONSTANT_NameAndType_info info, Void p) {
                 print("#" + info.name_index + ":#" + info.type_index);
                 tab();
                 println("//  " + stringValue(info));
                 return 1;
             }
             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 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_Methodref:
                 return "Method";
             case CONSTANT_InterfaceMethodref:
                 return "InterfaceMethod";
             case CONSTANT_NameAndType:
                 return "NameAndType";
             default:
                 return "(unknown 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 visitLong(CONSTANT_Long_info info, Void p) {
             return info.value + "l";
         }
         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);
             }
         }
         String getType(CONSTANT_NameAndType_info info) {
             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 '\"':
                         sb.append('\\').append('\"');
                         break;
                     default:
                         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;
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javap/ConstantWriter.java@4868a36f6fd8 (annotated)

src/share/classes/com/sun/tools/javap/ConstantWriter.java