| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.iapi.services.io.ApplicationObjectInputStream |
| 4 | |
| 5 | Copyright 1998, 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.io; |
| 22 | |
| 23 | import org.apache.derby.iapi.services.loader.ClassFactory; |
| 24 | |
| 25 | import java.io.ObjectStreamClass; |
| 26 | import java.io.ObjectInputStream; |
| 27 | import java.io.IOException; |
| 28 | import java.io.InputStream; |
| 29 | |
| 30 | /** |
| 31 | An object input stream that implements resolve class in order |
| 32 | to load the class through the ClassFactory.loadApplicationClass method. |
| 33 | */ |
| 34 | class ApplicationObjectInputStream extends ObjectInputStream |
| 35 | implements ErrorObjectInput |
| 36 | { |
| 37 | |
| 38 | protected ClassFactory cf; |
| 39 | protected ObjectStreamClass initialClass; |
| 40 | |
| 41 | ApplicationObjectInputStream(InputStream in, ClassFactory cf) |
| 42 | throws IOException { |
| 43 | super(in); |
| 44 | this.cf = cf; |
| 45 | } |
| 46 | |
| 47 | protected Class resolveClass(ObjectStreamClass v) |
| 48 | throws IOException, ClassNotFoundException { |
| 49 | |
| 50 | if (initialClass == null) |
| 51 | initialClass = v; |
| 52 | |
| 53 | if (cf != null) |
| 54 | return cf.loadApplicationClass(v); |
| 55 | |
| 56 | throw new ClassNotFoundException(v.getName()); |
| 57 | } |
| 58 | |
| 59 | public String getErrorInfo() { |
| 60 | if (initialClass == null) |
| 61 | return ""; |
| 62 | |
| 63 | return initialClass.getName() + " (serialVersionUID=" |
| 64 | + initialClass.getSerialVersionUID() + ")"; |
| 65 | } |
| 66 | |
| 67 | public Exception getNestedException() { |
| 68 | return null; |
| 69 | } |
| 70 | |
| 71 | } |