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comparison servlet/src/digilib/image/DocuImageImpl.java @ 1:0ff3ede32060

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Initial revision
author robcast
date Thu, 17 Jan 2002 15:25:46 +0100
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children 3b8797fc3e90 9cedd170b581
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0:ffd2df307e81 1:0ff3ede32060
1 /* DocuImage -- General image interface class implementation
2
3 Digital Image Library servlet components
4
5 Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de)
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2 of the License, or (at your
10 option) any later version.
11
12 Please read license.txt for the full details. A copy of the GPL
13 may be found at http://www.gnu.org/copyleft/lgpl.html
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 */
20
21 package digilib.image;
22
23 import java.io.*;
24 import javax.servlet.ServletResponse;
25
26 import digilib.*;
27 import digilib.io.*;
28
29 public abstract class DocuImageImpl implements DocuImage {
30
31 protected Utils util = null;
32
33 public DocuImageImpl() {
34 util = new Utils();
35 }
36
37 public DocuImageImpl(Utils u) {
38 util = u;
39 }
40
41 public void setUtils(Utils u) {
42 util = u;
43 }
44
45 protected String[] knownFileTypes = {"jpg", "png", "gif", "tiff"};
46
47 public String[] getKnownFileTypes() {
48 return knownFileTypes;
49 }
50
51 /**
52 * send an image file as-is
53 */
54 public void sendFile(File f, ServletResponse response) throws FileOpException {
55 util.dprintln(4, "sendFile("+f+")");
56 String mimeType = FileOps.mimeForFile(f);
57 if (mimeType == null) {
58 util.dprintln(2, "ERROR(sendFile): unknown file Type");
59 throw new FileOpException("Unknown file type.");
60 }
61 response.setContentType(mimeType);
62 // open file
63 try {
64 FileInputStream inFile = new FileInputStream(f);
65 OutputStream outStream = response.getOutputStream();
66 byte dataBuffer[] = new byte[1024];
67 int len;
68 while ((len = inFile.read(dataBuffer)) != -1) {
69 // copy out file
70 outStream.write(dataBuffer, 0, len);
71 }
72 inFile.close();
73 } catch (IOException e) {
74 util.dprintln(2, "ERROR(sendFile): unable to send file");
75 throw new FileOpException("Unable to send file.");
76 }
77 }
78
79 public abstract void loadImage(File f) throws FileOpException;
80 public abstract void writeImage(String mt, ServletResponse res) throws FileOpException;
81 public abstract int getWidth();
82 public abstract int getHeight();
83 public abstract void cropAndScale(int x_off, int y_off, int width, int height, float scale, int qual) throws ImageOpException;
84 }