Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: src/share/classes/com/sun/tools/classfile/ClassReader.java

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

changeset 46
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1 /*
2 * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package com.sun.tools.classfile;
27
28 import java.io.BufferedInputStream;
29 import java.io.ByteArrayInputStream;
30 import java.io.DataInputStream;
31 import java.io.IOException;
32 import java.io.InputStream;
33
34 /**
35 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
36 * you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public class ClassReader {
41 ClassReader(ClassFile classFile, InputStream in, Attribute.Factory attributeFactory) throws IOException {
42 // null checks
43 classFile.getClass();
44 attributeFactory.getClass();
45
46 this.classFile = classFile;
47 this.in = new DataInputStream(new BufferedInputStream(in));
48 this.attributeFactory = attributeFactory;
49 }
50
51 ClassFile getClassFile() {
52 return classFile;
53 }
54
55 ConstantPool getConstantPool() {
56 return classFile.constant_pool;
57 }
58
59 public Attribute readAttribute() throws IOException {
60 int name_index = readUnsignedShort();
61 int length = readInt();
62 byte[] data = new byte[length];
63 readFully(data);
64
65 DataInputStream prev = in;
66 in = new DataInputStream(new ByteArrayInputStream(data));
67 try {
68 return attributeFactory.createAttribute(this, name_index, data);
69 } finally {
70 in = prev;
71 }
72 }
73
74 public void readFully(byte[] b) throws IOException {
75 in.readFully(b);
76 }
77
78 public int readUnsignedByte() throws IOException {
79 return in.readUnsignedByte();
80 }
81
82 public int readUnsignedShort() throws IOException {
83 return in.readUnsignedShort();
84 }
85
86 public int readInt() throws IOException {
87 return in.readInt();
88 }
89
90 public long readLong() throws IOException {
91 return in.readLong();
92 }
93
94 public float readFloat() throws IOException {
95 return in.readFloat();
96 }
97
98 public double readDouble() throws IOException {
99 return in.readDouble();
100 }
101
102 public String readUTF() throws IOException {
103 return in.readUTF();
104 }
105
106 private DataInputStream in;
107 private ClassFile classFile;
108 private Attribute.Factory attributeFactory;
109 }

Mercurial Repository: jdk8-mips64-public/langtools

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