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 org.apache.harmony.nio.internal;
19:
20: import java.io.IOException;
21: import java.nio.MappedByteBuffer;
22:
23: import org.apache.harmony.luni.platform.IMemorySystem;
24:
25: public final class ReadWriteFileChannel extends FileChannelImpl {
26: public ReadWriteFileChannel(Object stream, long handle) {
27: super (stream, handle);
28: }
29:
30: public final MappedByteBuffer map(MapMode mode, long position,
31: long size) throws IOException {
32: openCheck();
33: if (mode == null) {
34: throw new NullPointerException();
35: }
36: if (position < 0 || size < 0 || size > Integer.MAX_VALUE) {
37: throw new IllegalArgumentException();
38: }
39: int mapMode;
40: if (mode == MapMode.READ_ONLY) {
41: mapMode = IMemorySystem.MMAP_READ_ONLY;
42: } else if (mode == MapMode.READ_WRITE) {
43: mapMode = IMemorySystem.MMAP_READ_WRITE;
44: } else {
45: mapMode = IMemorySystem.MMAP_WRITE_COPY;
46: }
47: return mapImpl(mapMode, position, size);
48: }
49: }
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