01: /*
02:
03: Derby - Class org.apache.derby.iapi.services.classfile.ClassInput
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (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;
25: import java.io.DataInputStream;
26: import java.io.IOException;
27:
28: /** A wrapper around DataInputStream to provide input functions in terms
29: of the types defined on pages 83.
30: */
31:
32: class ClassInput extends DataInputStream {
33:
34: ClassInput(InputStream in) {
35: super (in);
36: }
37:
38: int getU2() throws IOException {
39: return readUnsignedShort();
40: }
41:
42: int getU4() throws IOException {
43: return readInt();
44: }
45:
46: byte[] getU1Array(int count) throws IOException {
47: byte[] b = new byte[count];
48: readFully(b);
49: return b;
50: }
51: }
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