01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: *
19: */
20: package org.apache.mina.common;
21:
22: /**
23: * An {@link IoBufferWrapper} that prohibits derivation of the buffer.
24: * It is useful when you want expose your internal buffer which must be
25: * auto-expandable all the time.
26: *
27: * @author The Apache MINA Project (dev@mina.apache.org)
28: * @version $Rev: 594006 $, $Date: 2007-11-11 19:16:49 -0700 (Sun, 11 Nov 2007) $
29: */
30: public class UnderivableBuffer extends IoBufferWrapper {
31:
32: public UnderivableBuffer(IoBuffer buf) {
33: super (buf);
34: if (buf.isDerived()) {
35: throw new IllegalArgumentException(
36: "Derived buffer is not allowed.");
37: }
38: }
39:
40: @Override
41: public IoBuffer asReadOnlyBuffer() {
42: throw new UnsupportedOperationException(
43: "Buffer derivation disabled.");
44: }
45:
46: @Override
47: public IoBuffer duplicate() {
48: throw new UnsupportedOperationException(
49: "Buffer derivation disabled.");
50: }
51:
52: @Override
53: public IoBuffer slice() {
54: throw new UnsupportedOperationException(
55: "Buffer derivation disabled.");
56: }
57: }
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