src/share/classes/com/sun/tools/classfile/ClassFile.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.classfile;
jjg@46 27
jjg@46 28 import java.io.File;
jjg@46 29 import java.io.FileInputStream;
jjg@46 30 import java.io.IOException;
jjg@46 31 import java.io.InputStream;
jjg@46 32
jjg@46 33 import static com.sun.tools.classfile.AccessFlags.*;
jjg@46 34
jjg@46 35 /**
jjg@46 36 * See JVMS3, section 4.2.
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 ClassFile {
jjg@46 44 public static ClassFile read(File file)
jjg@46 45 throws IOException, ConstantPoolException {
jjg@46 46 return read(file, new Attribute.Factory());
jjg@46 47 }
jjg@46 48
jjg@46 49 public static ClassFile read(File file, Attribute.Factory attributeFactory)
jjg@46 50 throws IOException, ConstantPoolException {
jjg@46 51 FileInputStream in = new FileInputStream(file);
jjg@46 52 try {
jjg@46 53 return new ClassFile(in, attributeFactory);
jjg@46 54 } finally {
jjg@46 55 try {
jjg@46 56 in.close();
jjg@46 57 } catch (IOException e) {
jjg@46 58 // ignore
jjg@46 59 }
jjg@46 60 }
jjg@46 61 }
jjg@46 62
jjg@46 63 public static ClassFile read(InputStream in)
jjg@46 64 throws IOException, ConstantPoolException {
jjg@46 65 return new ClassFile(in, new Attribute.Factory());
jjg@46 66 }
jjg@46 67
jjg@46 68 public static ClassFile read(InputStream in, Attribute.Factory attributeFactory)
jjg@46 69 throws IOException, ConstantPoolException {
jjg@46 70 return new ClassFile(in, attributeFactory);
jjg@46 71 }
jjg@46 72
jjg@46 73 ClassFile(InputStream in, Attribute.Factory attributeFactory) throws IOException, ConstantPoolException {
jjg@46 74 ClassReader cr = new ClassReader(this, in, attributeFactory);
jjg@46 75 magic = cr.readInt();
jjg@46 76 minor_version = cr.readUnsignedShort();
jjg@46 77 major_version = cr.readUnsignedShort();
jjg@46 78 constant_pool = new ConstantPool(cr);
jjg@46 79 access_flags = new AccessFlags(cr);
jjg@46 80 this_class = cr.readUnsignedShort();
jjg@46 81 super_class = cr.readUnsignedShort();
jjg@46 82
jjg@46 83 int interfaces_count = cr.readUnsignedShort();
jjg@46 84 interfaces = new int[interfaces_count];
jjg@46 85 for (int i = 0; i < interfaces_count; i++)
jjg@46 86 interfaces[i] = cr.readUnsignedShort();
jjg@46 87
jjg@46 88 int fields_count = cr.readUnsignedShort();
jjg@46 89 fields = new Field[fields_count];
jjg@46 90 for (int i = 0; i < fields_count; i++)
jjg@46 91 fields[i] = new Field(cr);
jjg@46 92
jjg@46 93 int methods_count = cr.readUnsignedShort();
jjg@46 94 methods = new Method[methods_count];
jjg@46 95 for (int i = 0; i < methods_count; i++)
jjg@46 96 methods[i] = new Method(cr);
jjg@46 97
jjg@46 98 attributes = new Attributes(cr);
jjg@46 99 }
jjg@46 100
jjg@46 101 public ClassFile(int magic, int minor_version, int major_version,
jjg@46 102 ConstantPool constant_pool, AccessFlags access_flags,
jjg@46 103 int this_class, int super_class, int[] interfaces,
jjg@46 104 Field[] fields, Method[] methods, Attributes attributes) {
jjg@46 105 this.magic = magic;
jjg@46 106 this.minor_version = minor_version;
jjg@46 107 this.major_version = major_version;
jjg@46 108 this.constant_pool = constant_pool;
jjg@46 109 this.access_flags = access_flags;
jjg@46 110 this.this_class = this_class;
jjg@46 111 this.super_class = super_class;
jjg@46 112 this.interfaces = interfaces;
jjg@46 113 this.fields = fields;
jjg@46 114 this.methods = methods;
jjg@46 115 this.attributes = attributes;
jjg@46 116 }
jjg@46 117
jjg@46 118 public String getName() throws ConstantPoolException {
jjg@46 119 return constant_pool.getClassInfo(this_class).getName();
jjg@46 120 }
jjg@46 121
jjg@46 122 public String getSuperclassName() throws ConstantPoolException {
jjg@46 123 return constant_pool.getClassInfo(super_class).getName();
jjg@46 124 }
jjg@46 125
jjg@46 126 public String getInterfaceName(int i) throws ConstantPoolException {
jjg@46 127 return constant_pool.getClassInfo(interfaces[i]).getName();
jjg@46 128 }
jjg@46 129
jjg@46 130 public Attribute getAttribute(String name) {
jjg@46 131 return attributes.get(name);
jjg@46 132 }
jjg@46 133
jjg@46 134 public boolean isClass() {
jjg@46 135 return !isInterface();
jjg@46 136 }
jjg@46 137
jjg@46 138 public boolean isInterface() {
jjg@46 139 return access_flags.is(ACC_INTERFACE);
jjg@46 140 }
jjg@46 141
jjg@46 142 public final int magic;
jjg@46 143 public final int minor_version;
jjg@46 144 public final int major_version;
jjg@46 145 public final ConstantPool constant_pool;
jjg@46 146 public final AccessFlags access_flags;
jjg@46 147 public final int this_class;
jjg@46 148 public final int super_class;
jjg@46 149 public final int[] interfaces;
jjg@46 150 public final Field[] fields;
jjg@46 151 public final Method[] methods;
jjg@46 152 public final Attributes attributes;
jjg@46 153 }

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