ImageReader


1   /*
2    * $Id: ImageReader.java,v 1.3.2.1 2003/02/25 13:38:24 jeremias Exp $
3    * ============================================================================
4    *                    The Apache Software License, Version 1.1
5    * ============================================================================
6    * 
7    * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8    * 
9    * Redistribution and use in source and binary forms, with or without modifica-
10   * tion, are permitted provided that the following conditions are met:
11   * 
12   * 1. Redistributions of source code must retain the above copyright notice,
13   *    this list of conditions and the following disclaimer.
14   * 
15   * 2. Redistributions in binary form must reproduce the above copyright notice,
16   *    this list of conditions and the following disclaimer in the documentation
17   *    and/or other materials provided with the distribution.
18   * 
19   * 3. The end-user documentation included with the redistribution, if any, must
20   *    include the following acknowledgment: "This product includes software
21   *    developed by the Apache Software Foundation (http://www.apache.org/)."
22   *    Alternately, this acknowledgment may appear in the software itself, if
23   *    and wherever such third-party acknowledgments normally appear.
24   * 
25   * 4. The names "FOP" and "Apache Software Foundation" must not be used to
26   *    endorse or promote products derived from this software without prior
27   *    written permission. For written permission, please contact
28   *    apache@apache.org.
29   * 
30   * 5. Products derived from this software may not be called "Apache", nor may
31   *    "Apache" appear in their name, without prior written permission of the
32   *    Apache Software Foundation.
33   * 
34   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37   * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39   * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41   * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44   * ============================================================================
45   * 
46   * This software consists of voluntary contributions made by many individuals
47   * on behalf of the Apache Software Foundation and was originally created by
48   * James Tauber <jtauber@jtauber.com>. For more information on the Apache
49   * Software Foundation, please see <http://www.apache.org/>.
50   */ 
51  package org.apache.fop.image.analyser;
52  
53  // Java
54  import java.io.BufferedInputStream  ;
55  import java.io.IOException  ;
56  
57  /**
58   * ImageReader objects read image headers to determine the image size.
59   * @author Pankaj Narula
60   */
61  public interface ImageReader {
62  
63      /**
64       * Verify image type.
65       * @param bis Image buffered input stream
66       * @return true if image type is the handled one
67       * @exception IOException io error
68       */
69      boolean verifySignature(String   uri, BufferedInputStream   bis)
70              throws IOException  ;
71  
72      /**
73       * Return the used InputStream.
74       * @return BufferedInputStream used to verify image type
75       */
76      BufferedInputStream   getInputStream();
77  
78      /**
79       * Return correspondig mime type.
80       * @return image mime type
81       */
82      String   getMimeType();
83  
84      /**
85       * Return the image height.
86       * @return image height
87       */
88      int getHeight();
89  
90      /**
91       * Return the image width.
92       * @return image width
93       */
94      int getWidth();
95  }
96  
97
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