src/share/classes/com/sun/tools/classfile/ClassFile.java

Thu, 04 Aug 2016 23:36:47 -0700

author
asaha
date
Thu, 04 Aug 2016 23:36:47 -0700
changeset 3270
8a30511b2ea4
parent 1863
8e3d391c88c6
child 2525
2eb010b6cb22
permissions
-rw-r--r--

8162511: 8u111 L10n resource file updates
Summary: 8u111 L10n resource file updates
Reviewed-by: coffeys
Contributed-by: li.jiang@oracle.com

jjg@46 1 /*
vromero@1784 2 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. 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
ohair@554 7 * published by the Free Software Foundation. Oracle designates this
jjg@46 8 * particular file as subject to the "Classpath" exception as provided
ohair@554 9 * by Oracle 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 *
ohair@554 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554 22 * or visit www.oracle.com if you need additional information or have any
ohair@554 23 * 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.IOException;
jjg@46 30 import java.io.InputStream;
vromero@1863 31 import java.nio.file.Files;
vromero@1784 32 import java.nio.file.Path;
jjg@46 33
jjg@46 34 import static com.sun.tools.classfile.AccessFlags.*;
jjg@46 35
jjg@46 36 /**
jjh@972 37 * See JVMS, section 4.2.
jjg@46 38 *
jjg@581 39 * <p><b>This is NOT part of any supported API.
jjg@581 40 * If you write code that depends on this, you do so at your own risk.
jjg@46 41 * This code and its internal interfaces are subject to change or
jjg@46 42 * deletion without notice.</b>
jjg@46 43 */
jjg@46 44 public class ClassFile {
jjg@46 45 public static ClassFile read(File file)
jjg@46 46 throws IOException, ConstantPoolException {
vromero@1863 47 return read(file.toPath(), new Attribute.Factory());
jjg@46 48 }
jjg@46 49
vromero@1863 50 public static ClassFile read(Path input)
vromero@1784 51 throws IOException, ConstantPoolException {
vromero@1863 52 return read(input, new Attribute.Factory());
vromero@1863 53 }
vromero@1863 54
vromero@1863 55 public static ClassFile read(Path input, Attribute.Factory attributeFactory)
vromero@1863 56 throws IOException, ConstantPoolException {
vromero@1863 57 try (InputStream in = Files.newInputStream(input)) {
vromero@1863 58 return new ClassFile(in, attributeFactory);
vromero@1863 59 }
vromero@1784 60 }
vromero@1784 61
jjg@46 62 public static ClassFile read(File file, Attribute.Factory attributeFactory)
jjg@46 63 throws IOException, ConstantPoolException {
vromero@1863 64 return read(file.toPath(), attributeFactory);
jjg@46 65 }
jjg@46 66
jjg@46 67 public static ClassFile read(InputStream in)
jjg@46 68 throws IOException, ConstantPoolException {
jjg@46 69 return new ClassFile(in, new Attribute.Factory());
jjg@46 70 }
jjg@46 71
jjg@46 72 public static ClassFile read(InputStream in, Attribute.Factory attributeFactory)
jjg@46 73 throws IOException, ConstantPoolException {
jjg@46 74 return new ClassFile(in, attributeFactory);
jjg@46 75 }
jjg@46 76
jjg@46 77 ClassFile(InputStream in, Attribute.Factory attributeFactory) throws IOException, ConstantPoolException {
jjg@46 78 ClassReader cr = new ClassReader(this, in, attributeFactory);
jjg@46 79 magic = cr.readInt();
jjg@46 80 minor_version = cr.readUnsignedShort();
jjg@46 81 major_version = cr.readUnsignedShort();
jjg@46 82 constant_pool = new ConstantPool(cr);
jjg@46 83 access_flags = new AccessFlags(cr);
jjg@46 84 this_class = cr.readUnsignedShort();
jjg@46 85 super_class = cr.readUnsignedShort();
jjg@46 86
jjg@46 87 int interfaces_count = cr.readUnsignedShort();
jjg@46 88 interfaces = new int[interfaces_count];
jjg@46 89 for (int i = 0; i < interfaces_count; i++)
jjg@46 90 interfaces[i] = cr.readUnsignedShort();
jjg@46 91
jjg@46 92 int fields_count = cr.readUnsignedShort();
jjg@46 93 fields = new Field[fields_count];
jjg@46 94 for (int i = 0; i < fields_count; i++)
jjg@46 95 fields[i] = new Field(cr);
jjg@46 96
jjg@46 97 int methods_count = cr.readUnsignedShort();
jjg@46 98 methods = new Method[methods_count];
jjg@46 99 for (int i = 0; i < methods_count; i++)
jjg@46 100 methods[i] = new Method(cr);
jjg@46 101
jjg@46 102 attributes = new Attributes(cr);
jjg@46 103 }
jjg@46 104
jjg@46 105 public ClassFile(int magic, int minor_version, int major_version,
jjg@46 106 ConstantPool constant_pool, AccessFlags access_flags,
jjg@46 107 int this_class, int super_class, int[] interfaces,
jjg@46 108 Field[] fields, Method[] methods, Attributes attributes) {
jjg@46 109 this.magic = magic;
jjg@46 110 this.minor_version = minor_version;
jjg@46 111 this.major_version = major_version;
jjg@46 112 this.constant_pool = constant_pool;
jjg@46 113 this.access_flags = access_flags;
jjg@46 114 this.this_class = this_class;
jjg@46 115 this.super_class = super_class;
jjg@46 116 this.interfaces = interfaces;
jjg@46 117 this.fields = fields;
jjg@46 118 this.methods = methods;
jjg@46 119 this.attributes = attributes;
jjg@46 120 }
jjg@46 121
jjg@46 122 public String getName() throws ConstantPoolException {
jjg@46 123 return constant_pool.getClassInfo(this_class).getName();
jjg@46 124 }
jjg@46 125
jjg@46 126 public String getSuperclassName() throws ConstantPoolException {
jjg@46 127 return constant_pool.getClassInfo(super_class).getName();
jjg@46 128 }
jjg@46 129
jjg@46 130 public String getInterfaceName(int i) throws ConstantPoolException {
jjg@46 131 return constant_pool.getClassInfo(interfaces[i]).getName();
jjg@46 132 }
jjg@46 133
jjg@46 134 public Attribute getAttribute(String name) {
jjg@46 135 return attributes.get(name);
jjg@46 136 }
jjg@46 137
jjg@46 138 public boolean isClass() {
jjg@46 139 return !isInterface();
jjg@46 140 }
jjg@46 141
jjg@46 142 public boolean isInterface() {
jjg@46 143 return access_flags.is(ACC_INTERFACE);
jjg@46 144 }
jjg@46 145
jjg@345 146 public int byteLength() {
jjg@345 147 return 4 + // magic
jjg@345 148 2 + // minor
jjg@345 149 2 + // major
jjg@345 150 constant_pool.byteLength() +
jjg@345 151 2 + // access flags
jjg@345 152 2 + // this_class
jjg@345 153 2 + // super_class
jjg@345 154 byteLength(interfaces) +
jjg@345 155 byteLength(fields) +
jjg@345 156 byteLength(methods) +
jjg@345 157 attributes.byteLength();
jjg@345 158 }
jjg@345 159
jjg@345 160 private int byteLength(int[] indices) {
jjg@345 161 return 2 + 2 * indices.length;
jjg@345 162 }
jjg@345 163
jjg@345 164 private int byteLength(Field[] fields) {
jjg@345 165 int length = 2;
jjg@345 166 for (Field f: fields)
jjg@345 167 length += f.byteLength();
jjg@345 168 return length;
jjg@345 169 }
jjg@345 170
jjg@345 171 private int byteLength(Method[] methods) {
jjg@345 172 int length = 2;
jjg@345 173 for (Method m: methods)
jjg@345 174 length += m.byteLength();
jjg@345 175 return length;
jjg@345 176 }
jjg@345 177
jjg@46 178 public final int magic;
jjg@46 179 public final int minor_version;
jjg@46 180 public final int major_version;
jjg@46 181 public final ConstantPool constant_pool;
jjg@46 182 public final AccessFlags access_flags;
jjg@46 183 public final int this_class;
jjg@46 184 public final int super_class;
jjg@46 185 public final int[] interfaces;
jjg@46 186 public final Field[] fields;
jjg@46 187 public final Method[] methods;
jjg@46 188 public final Attributes attributes;
jjg@46 189 }

mercurial