KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > mmbase > util > images > ImageMagickImageInformer


1 /*
2  
3 This software is OSI Certified Open Source Software.
4 OSI Certified is a certification mark of the Open Source Initiative.
5  
6 The license (Mozilla version 1.0) can be read at the MMBase site.
7 See http://www.MMBase.org/license
8  
9  */
10 package org.mmbase.util.images;
11
12 import java.util.*;
13 import java.io.*;
14 import java.util.regex.*;
15
16 import org.mmbase.util.externalprocess.CommandLauncher;
17 import org.mmbase.util.externalprocess.ProcessException;
18
19 import org.mmbase.util.logging.Logging;
20 import org.mmbase.util.logging.Logger;
21
22 /**
23  * Informs about a image using the 'identify' binary of ImageMagick.
24  *
25  * @author Michiel Meeuwissen
26  * @since MMBase-1.8
27  * @version $Id: ImageMagickImageInformer.java,v 1.1 2005/05/09 09:53:07 michiel Exp $
28  */
29 public class ImageMagickImageInformer implements ImageInformer {
30     
31     private static final Logger log = Logging.getLoggerInstance(ImageMagickImageInformer.class);
32
33     // Currently only ImageMagick works, this are the default value's
34 private static String JavaDoc identifyPath = "identify"; // in the path.
35
36     private static final Pattern IDENTIFY_PATTERN = Pattern.compile(".+?\\s.*?\\s(\\d+)x(\\d+).*");
37
38     public void init(Map params) {
39         String JavaDoc identifyCommand = "identify";
40         
41         if(System.getProperty("os.name") != null && System.getProperty("os.name").startsWith("Windows")) {
42             // on the windows system, we _can_ assume the it uses .exe as extention...
43 // otherwise the check on existance of the program will fail.
44 identifyCommand += ".exe";
45         }
46
47     }
48
49
50     public Dimension getDimension(byte[] input) throws IOException {
51
52         File file = File.createTempFile("ImageMagickImageInformer", null);
53         FileOutputStream image = new FileOutputStream(file);
54         image.write(input);
55         image.close();
56
57         try {
58             CommandLauncher launcher = new CommandLauncher("ImageMagick's identify");
59             ByteArrayOutputStream errorStream = new ByteArrayOutputStream();
60             ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
61  
62             launcher.execute(identifyPath, new String JavaDoc[] {file.getCanonicalPath()});
63             launcher.waitAndRead(outputStream, errorStream);
64             String JavaDoc result = new String JavaDoc(outputStream.toByteArray()).trim();
65             Matcher matcher = IDENTIFY_PATTERN.matcher(result);
66             if (! matcher.matches()) throw new IOException("'" + result + "' doesn't match " + IDENTIFY_PATTERN);
67             return new Dimension(Integer.parseInt(matcher.group(1)), Integer.parseInt(matcher.group(2)));
68         } catch (UnsupportedEncodingException uee) {
69             log.error(uee.toString());
70         } catch (ProcessException pe) {
71             log.error(pe.toString());
72         } finally {
73             file.delete();
74         }
75         return new Dimension(0, 0);
76
77     }
78     public static void main(String JavaDoc[] args) {
79         try {
80             File file = new File(args[0]);
81             FileInputStream input = new FileInputStream(file);
82             ByteArrayOutputStream bytes = new ByteArrayOutputStream();
83             int b = input.read();
84             while (b != -1) {
85                 bytes.write(b);
86                 b = input.read();
87             }
88             input.close();
89             byte[] ba = bytes.toByteArray();
90             ImageInformer imii = new ImageMagickImageInformer();
91             ImageInformer jaiii = new JAIImageInformer();
92             ImageInformer dii = new DummyImageInformer();
93             System.out.println("Image magick " + imii.getDimension(ba));
94             System.out.println("JAI " + jaiii.getDimension(ba));
95             System.out.println("Dummy " + dii.getDimension(ba));
96         } catch (IOException ioe) {
97             throw new RuntimeException JavaDoc(ioe);
98         }
99         
100     }
101
102 }
103
Popular Tags