| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.iapi.services.classfile.ClassInput |
| 4 | |
| 5 | Copyright 2000, 2004 The Apache Software Foundation or its licensors, as applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | package org.apache.derby.iapi.services.classfile; |
| 22 | |
| 23 | import java.io.InputStream; |
| 24 | import java.io.DataInputStream; |
| 25 | import java.io.IOException; |
| 26 | |
| 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 | int getU4() throws IOException { |
| 42 | return readInt(); |
| 43 | } |
| 44 | byte[] getU1Array(int count) throws IOException { |
| 45 | byte[] b = new byte[count]; |
| 46 | readFully(b); |
| 47 | return b; |
| 48 | } |
| 49 | } |