45N/A/*
553N/A * Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
45N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
45N/A *
45N/A * This code is free software; you can redistribute it and/or modify it
45N/A * under the terms of the GNU General Public License version 2 only, as
553N/A * published by the Free Software Foundation. Oracle designates this
45N/A * particular file as subject to the "Classpath" exception as provided
553N/A * by Oracle in the LICENSE file that accompanied this code.
45N/A *
45N/A * This code is distributed in the hope that it will be useful, but WITHOUT
45N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
45N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
45N/A * version 2 for more details (a copy is included in the LICENSE file that
45N/A * accompanied this code).
45N/A *
45N/A * You should have received a copy of the GNU General Public License version
45N/A * 2 along with this work; if not, write to the Free Software Foundation,
45N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
45N/A *
553N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
553N/A * or visit www.oracle.com if you need additional information or have any
553N/A * questions.
45N/A */
45N/A
45N/Apackage com.sun.tools.classfile;
45N/A
45N/Aimport java.io.BufferedInputStream;
45N/Aimport java.io.ByteArrayInputStream;
45N/Aimport java.io.DataInputStream;
45N/Aimport java.io.IOException;
45N/Aimport java.io.InputStream;
45N/A
45N/A/**
580N/A * <p><b>This is NOT part of any supported API.
580N/A * If you write code that depends on this, you do so at your own risk.
45N/A * This code and its internal interfaces are subject to change or
45N/A * deletion without notice.</b>
45N/A */
45N/Apublic class ClassReader {
45N/A ClassReader(ClassFile classFile, InputStream in, Attribute.Factory attributeFactory) throws IOException {
45N/A // null checks
45N/A classFile.getClass();
45N/A attributeFactory.getClass();
45N/A
45N/A this.classFile = classFile;
45N/A this.in = new DataInputStream(new BufferedInputStream(in));
45N/A this.attributeFactory = attributeFactory;
45N/A }
45N/A
45N/A ClassFile getClassFile() {
45N/A return classFile;
45N/A }
45N/A
45N/A ConstantPool getConstantPool() {
45N/A return classFile.constant_pool;
45N/A }
45N/A
45N/A public Attribute readAttribute() throws IOException {
45N/A int name_index = readUnsignedShort();
45N/A int length = readInt();
45N/A byte[] data = new byte[length];
45N/A readFully(data);
45N/A
45N/A DataInputStream prev = in;
45N/A in = new DataInputStream(new ByteArrayInputStream(data));
45N/A try {
45N/A return attributeFactory.createAttribute(this, name_index, data);
45N/A } finally {
45N/A in = prev;
45N/A }
45N/A }
45N/A
45N/A public void readFully(byte[] b) throws IOException {
45N/A in.readFully(b);
45N/A }
45N/A
45N/A public int readUnsignedByte() throws IOException {
45N/A return in.readUnsignedByte();
45N/A }
45N/A
45N/A public int readUnsignedShort() throws IOException {
45N/A return in.readUnsignedShort();
45N/A }
45N/A
45N/A public int readInt() throws IOException {
45N/A return in.readInt();
45N/A }
45N/A
45N/A public long readLong() throws IOException {
45N/A return in.readLong();
45N/A }
45N/A
45N/A public float readFloat() throws IOException {
45N/A return in.readFloat();
45N/A }
45N/A
45N/A public double readDouble() throws IOException {
45N/A return in.readDouble();
45N/A }
45N/A
45N/A public String readUTF() throws IOException {
45N/A return in.readUTF();
45N/A }
45N/A
45N/A private DataInputStream in;
45N/A private ClassFile classFile;
45N/A private Attribute.Factory attributeFactory;
45N/A}