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

Tue, 03 Jun 2008 13:26:47 -0700

author
jjg
date
Tue, 03 Jun 2008 13:26:47 -0700
changeset 46
7708bd6d800d
child 54
eaf608c64fec
permissions
-rw-r--r--

4075303: Use javap to enquire aboput a specific inner class
4348375: Javap is not internationalized
4459541: "javap -l" shows line numbers as signed short; they should be unsigned
4501660: change diagnostic of -help as 'print this help message and exit'
4776241: unused source file in javap...
4870651: javap should recognize generics, varargs, enum
4876942: javap invoked without args does not print help screen
4880663: javap could output whitespace between class name and opening brace
4975569: javap doesn't print new flag bits
6271787: javap dumps LocalVariableTypeTable attribute in hex, needs to print a table
6305779: javap: support annotations
6439940: Clean up javap implementation
6469569: wrong check of searchpath in JavapEnvironment
6474890: javap does not open .zip files in -classpath
6587786: Javap throws error : "ERROR:Could not find <classname>" for JRE classes
6622215: javap ignores certain relevant access flags
6622216: javap names some attributes incorrectly
6622232: javap gets whitespace confused
6622260: javap prints negative bytes incorrectly in hex
Reviewed-by: ksrini

jjg@46 1 /*
jjg@46 2 * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
jjg@46 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@46 4 *
jjg@46 5 * This code is free software; you can redistribute it and/or modify it
jjg@46 6 * under the terms of the GNU General Public License version 2 only, as
jjg@46 7 * published by the Free Software Foundation. Sun designates this
jjg@46 8 * particular file as subject to the "Classpath" exception as provided
jjg@46 9 * by Sun in the LICENSE file that accompanied this code.
jjg@46 10 *
jjg@46 11 * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@46 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@46 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
jjg@46 14 * version 2 for more details (a copy is included in the LICENSE file that
jjg@46 15 * accompanied this code).
jjg@46 16 *
jjg@46 17 * You should have received a copy of the GNU General Public License version
jjg@46 18 * 2 along with this work; if not, write to the Free Software Foundation,
jjg@46 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@46 20 *
jjg@46 21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
jjg@46 22 * CA 95054 USA or visit www.sun.com if you need additional information or
jjg@46 23 * have any questions.
jjg@46 24 */
jjg@46 25
jjg@46 26 package com.sun.tools.javap;
jjg@46 27
jjg@46 28 import java.io.PrintWriter;
jjg@46 29
jjg@46 30 import com.sun.tools.classfile.AttributeException;
jjg@46 31 import com.sun.tools.classfile.ConstantPoolException;
jjg@46 32 import com.sun.tools.classfile.DescriptorException;
jjg@46 33
jjg@46 34 /*
jjg@46 35 * A writer similar to a PrintWriter but which does not hide exceptions.
jjg@46 36 * The standard print calls are line-buffered; report calls write messages directly.
jjg@46 37 *
jjg@46 38 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
jjg@46 39 * you write code that depends on this, you do so at your own risk.
jjg@46 40 * This code and its internal interfaces are subject to change or
jjg@46 41 * deletion without notice.</b>
jjg@46 42 */
jjg@46 43 public class BasicWriter {
jjg@46 44 protected BasicWriter(Context context) {
jjg@46 45 lineWriter = LineWriter.instance(context);
jjg@46 46 out = context.get(PrintWriter.class);
jjg@46 47 }
jjg@46 48
jjg@46 49 protected void print(String s) {
jjg@46 50 lineWriter.print(s);
jjg@46 51 }
jjg@46 52
jjg@46 53 protected void print(Object o) {
jjg@46 54 lineWriter.print(o == null ? null : o.toString());
jjg@46 55 }
jjg@46 56
jjg@46 57 protected void println() {
jjg@46 58 lineWriter.println();
jjg@46 59 }
jjg@46 60
jjg@46 61 protected void println(String s) {
jjg@46 62 lineWriter.print(s);
jjg@46 63 lineWriter.println();
jjg@46 64 }
jjg@46 65
jjg@46 66 protected void println(Object o) {
jjg@46 67 lineWriter.print(o == null ? null : o.toString());
jjg@46 68 lineWriter.println();
jjg@46 69 }
jjg@46 70
jjg@46 71 protected String report(AttributeException e) {
jjg@46 72 out.println("Error: " + e.getMessage()); // i18n?
jjg@46 73 return "???";
jjg@46 74 }
jjg@46 75
jjg@46 76 protected String report(ConstantPoolException e) {
jjg@46 77 out.println("Error: " + e.getMessage()); // i18n?
jjg@46 78 return "???";
jjg@46 79 }
jjg@46 80
jjg@46 81 protected String report(DescriptorException e) {
jjg@46 82 out.println("Error: " + e.getMessage()); // i18n?
jjg@46 83 return "???";
jjg@46 84 }
jjg@46 85
jjg@46 86 protected String report(String msg) {
jjg@46 87 out.println("Error: " + msg); // i18n?
jjg@46 88 return "???";
jjg@46 89 }
jjg@46 90
jjg@46 91 private LineWriter lineWriter;
jjg@46 92 private PrintWriter out;
jjg@46 93
jjg@46 94 private static class LineWriter {
jjg@46 95 static LineWriter instance(Context context) {
jjg@46 96 LineWriter instance = context.get(LineWriter.class);
jjg@46 97 if (instance == null)
jjg@46 98 instance = new LineWriter(context);
jjg@46 99 return instance;
jjg@46 100 }
jjg@46 101
jjg@46 102 protected LineWriter(Context context) {
jjg@46 103 context.put(LineWriter.class, this);
jjg@46 104 out = context.get(PrintWriter.class);
jjg@46 105 buffer = new StringBuilder();
jjg@46 106 }
jjg@46 107
jjg@46 108 protected void print(String s) {
jjg@46 109 if (s == null)
jjg@46 110 s = "null";
jjg@46 111 for (int i = 0; i < s.length(); i++) {
jjg@46 112 char c = s.charAt(i);
jjg@46 113 if (c == '\n') {
jjg@46 114 println();
jjg@46 115 } else {
jjg@46 116 buffer.append(c);
jjg@46 117 }
jjg@46 118 }
jjg@46 119
jjg@46 120 }
jjg@46 121
jjg@46 122 protected void println() {
jjg@46 123 out.println(buffer);
jjg@46 124 buffer.setLength(0);
jjg@46 125 }
jjg@46 126
jjg@46 127 private PrintWriter out;
jjg@46 128 private StringBuilder buffer;
jjg@46 129 }
jjg@46 130 }
jjg@46 131

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