01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package java.io;
19:
20: /**
21: * Objects that want to be serialized/deserialized using
22: * ObjectOutputStream/ObjectInputStream but defining their own byte
23: * representation should implement this interface.
24: */
25: public interface Externalizable extends Serializable {
26: /**
27: * Reads the next object from the ObjectInput <code>input</code>
28: *
29: * @param input
30: * the ObjectInput from which the next object is read
31: *
32: * @throws IOException
33: * If an error occurs attempting to read from this ObjectInput.
34: * @throws ClassNotFoundException
35: * If the class of the instance being loaded cannot be found
36: */
37: public void readExternal(ObjectInput input) throws IOException,
38: ClassNotFoundException;
39:
40: /**
41: * Writes the receiver to the ObjectOutput <code>output</code>.
42: *
43: * @param output
44: * an ObjectOutput where to write the object
45: *
46: * @throws IOException
47: * If an error occurs attempting to write to the ObjectOutput.
48: */
49: public void writeExternal(ObjectOutput output) throws IOException;
50: }
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