1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * 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 package org.apache.commons.vfs2.provider.ram;
18
19 import java.io.IOException;
20 import java.io.OutputStream;
21
22 import org.apache.commons.vfs2.FileSystemException;
23
24 /**
25 * OutputStream to a RamFile.
26 */
27 public class RamFileOutputStream extends OutputStream {
28
29 /**
30 * File.
31 */
32 protected RamFileObject file;
33
34 /**
35 * buffer.
36 */
37 protected byte[] buffer1 = new byte[1];
38
39 /** File is open or closed */
40 protected boolean closed;
41
42 private IOException exception;
43
44 /**
45 * @param file The base file.
46 */
47 public RamFileOutputStream(final RamFileObject file) {
48 this.file = file;
49 }
50
51 /*
52 * (non-Javadoc)
53 *
54 * @see java.io.DataOutput#write(byte[], int, int)
55 */
56 @Override
57 public void write(final byte[] b, final int off, final int len) throws IOException {
58 final RamFileData data = this.file.getData();
59 final int size = data.size();
60 final int newSize = size + len;
61 // Store the Exception in order to notify the client again on close()
62 try {
63 this.file.resize(newSize);
64 } catch (final IOException e) {
65 this.exception = e;
66 throw e;
67 }
68 System.arraycopy(b, off, data.getContent(), size, len);
69 }
70
71 /*
72 * (non-Javadoc)
73 *
74 * @see java.io.DataOutput#write(int)
75 */
76 @Override
77 public void write(final int b) throws IOException {
78 buffer1[0] = (byte) b;
79 this.write(buffer1);
80 }
81
82 @Override
83 public void flush() throws IOException {
84 }
85
86 @Override
87 public void close() throws IOException {
88 if (closed) {
89 return;
90 }
91 // Notify on close that there was an IOException while writing
92 if (exception != null) {
93 throw exception;
94 }
95 try {
96 this.closed = true;
97 // Close the
98 this.file.endOutput();
99 } catch (final Exception e) {
100 throw new FileSystemException(e);
101 }
102 }
103
104 }