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Java > Open Source Codes > org > apache > derby > client > am > BlobOutputStream


1 /*
2
3    Derby - Class org.apache.derby.client.am.BlobOutputStream
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to You under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20 */
21
22 package org.apache.derby.client.am;
23
24
25 public class BlobOutputStream extends java.io.OutputStream JavaDoc {
26     private Blob blob_;
27     private long offset_;
28
29     public BlobOutputStream(Blob blob, long offset) {
30         blob_ = blob;
31         offset_ = offset;
32         
33         /*
34             offset_=1 while blob_.binaryString_.length - blob_.dataOffset_ = 0
35             for a empty Blob hence check for offset_-1
36          */
37         if ((offset_-1) > (blob_.binaryString_.length - blob_.dataOffset_)) {
38             throw new IndexOutOfBoundsException JavaDoc();
39         }
40     }
41
42     public void write(int b) throws java.io.IOException JavaDoc {
43
44         byte[] newbuf = new byte[(int) offset_ + blob_.dataOffset_];
45         System.arraycopy(blob_.binaryString_, 0, newbuf, 0, (int) offset_ - 1 + blob_.dataOffset_);
46         blob_.binaryString_ = newbuf;
47         blob_.binaryString_[(int) offset_ + blob_.dataOffset_ - 1] = (byte) b;
48         blob_.binaryStream_ = new java.io.ByteArrayInputStream JavaDoc(blob_.binaryString_);
49         blob_.sqlLength_ = blob_.binaryString_.length - blob_.dataOffset_;
50         offset_++;
51     }
52
53     public void write(byte b[], int off, int len) throws java.io.IOException JavaDoc {
54         if (b == null) {
55             throw new NullPointerException JavaDoc();
56         } else if ((off < 0) || (off > b.length) || (len < 0) ||
57                 ((off + len) > b.length) || ((off + len) < 0)) {
58             throw new IndexOutOfBoundsException JavaDoc();
59         } else if (len == 0) {
60             return;
61         }
62         byte[] newbuf = new byte[(int) offset_ - 1 + len + blob_.dataOffset_];
63         System.arraycopy(blob_.binaryString_, 0, newbuf, 0, (int) offset_ - 1 + blob_.dataOffset_);
64         blob_.binaryString_ = newbuf;
65         for (int i = 0; i < len; i++, offset_++) {
66             blob_.binaryString_[(int) offset_ + blob_.dataOffset_ - 1] = b[off + i];
67         }
68         blob_.binaryStream_ = new java.io.ByteArrayInputStream JavaDoc(blob_.binaryString_);
69         blob_.sqlLength_ = blob_.binaryString_.length - blob_.dataOffset_;
70     }
71 }
72
73
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