1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/classfile/ClassReader.java Tue Jun 03 13:26:47 2008 -0700
1.3 @@ -0,0 +1,109 @@
1.4 +/*
1.5 + * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.classfile;
1.30 +
1.31 +import java.io.BufferedInputStream;
1.32 +import java.io.ByteArrayInputStream;
1.33 +import java.io.DataInputStream;
1.34 +import java.io.IOException;
1.35 +import java.io.InputStream;
1.36 +
1.37 +/**
1.38 + * <p><b>This is NOT part of any API supported by Sun Microsystems. If
1.39 + * you write code that depends on this, you do so at your own risk.
1.40 + * This code and its internal interfaces are subject to change or
1.41 + * deletion without notice.</b>
1.42 + */
1.43 +public class ClassReader {
1.44 + ClassReader(ClassFile classFile, InputStream in, Attribute.Factory attributeFactory) throws IOException {
1.45 + // null checks
1.46 + classFile.getClass();
1.47 + attributeFactory.getClass();
1.48 +
1.49 + this.classFile = classFile;
1.50 + this.in = new DataInputStream(new BufferedInputStream(in));
1.51 + this.attributeFactory = attributeFactory;
1.52 + }
1.53 +
1.54 + ClassFile getClassFile() {
1.55 + return classFile;
1.56 + }
1.57 +
1.58 + ConstantPool getConstantPool() {
1.59 + return classFile.constant_pool;
1.60 + }
1.61 +
1.62 + public Attribute readAttribute() throws IOException {
1.63 + int name_index = readUnsignedShort();
1.64 + int length = readInt();
1.65 + byte[] data = new byte[length];
1.66 + readFully(data);
1.67 +
1.68 + DataInputStream prev = in;
1.69 + in = new DataInputStream(new ByteArrayInputStream(data));
1.70 + try {
1.71 + return attributeFactory.createAttribute(this, name_index, data);
1.72 + } finally {
1.73 + in = prev;
1.74 + }
1.75 + }
1.76 +
1.77 + public void readFully(byte[] b) throws IOException {
1.78 + in.readFully(b);
1.79 + }
1.80 +
1.81 + public int readUnsignedByte() throws IOException {
1.82 + return in.readUnsignedByte();
1.83 + }
1.84 +
1.85 + public int readUnsignedShort() throws IOException {
1.86 + return in.readUnsignedShort();
1.87 + }
1.88 +
1.89 + public int readInt() throws IOException {
1.90 + return in.readInt();
1.91 + }
1.92 +
1.93 + public long readLong() throws IOException {
1.94 + return in.readLong();
1.95 + }
1.96 +
1.97 + public float readFloat() throws IOException {
1.98 + return in.readFloat();
1.99 + }
1.100 +
1.101 + public double readDouble() throws IOException {
1.102 + return in.readDouble();
1.103 + }
1.104 +
1.105 + public String readUTF() throws IOException {
1.106 + return in.readUTF();
1.107 + }
1.108 +
1.109 + private DataInputStream in;
1.110 + private ClassFile classFile;
1.111 + private Attribute.Factory attributeFactory;
1.112 +}
