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Java > Open Source Codes > org > apache > derby > iapi > services > classfile > ClassInput


1 /*
2
3    Derby - Class org.apache.derby.iapi.services.classfile.ClassInput
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.iapi.services.classfile;
23
24 import java.io.InputStream JavaDoc;
25 import java.io.DataInputStream JavaDoc;
26 import java.io.IOException JavaDoc;
27
28
29 /** A wrapper around DataInputStream to provide input functions in terms
30     of the types defined on pages 83.
31  */
32
33 class ClassInput extends DataInputStream JavaDoc {
34
35     ClassInput(InputStream JavaDoc in) {
36         super(in);
37     }
38
39     int getU2() throws IOException JavaDoc {
40         return readUnsignedShort();
41     }
42     int getU4() throws IOException JavaDoc {
43         return readInt();
44     }
45     byte[] getU1Array(int count) throws IOException JavaDoc {
46         byte[] b = new byte[count];
47         readFully(b);
48         return b;
49     }
50 }
51
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