2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with the com.oreilly.servlet library, any library
22 * licensed under the Apache Software License, The Sun (tm) Java Advanced
23 * Imaging library (JAI), The Sun JIMI library (or with modified versions of
24 * the above that use the same license as the above), and distribute linked
25 * combinations including the two. You must obey the GNU General Public
26 * License in all respects for all of the code used other than the above
27 * mentioned libraries. If you modify this file, you may extend this exception
28 * to your version of the file, but you are not obligated to do so. If you do
29 * not wish to do so, delete this exception statement from your version.
32 package mircoders.entity;
40 * kind of hack for postgres non-standard LargeObjects that Poolman
41 * doesn't know about. see all the casting, LargeObj stuff in getIcon, getImage
42 * at some point when postgres has normal BLOB support, this should go.
44 import org.postgresql.Connection;
45 import org.postgresql.largeobject.LargeObject;
46 import org.postgresql.largeobject.LargeObjectManager;
47 import org.postgresql.largeobject.BlobInputStream;
54 * Diese Klasse enthält die Daten eines MetaObjekts
57 * @version $Id: EntityImages.java,v 1.6.4.5 2002/12/05 08:40:18 mh Exp $
61 public class EntityImages extends EntityUploadedMedia
69 public EntityImages(StorageObject theStorage) {
71 setStorage(theStorage);
78 public InputStream getImage() throws StorageObjectException
80 theLog.printDebugInfo("--getimage started");
81 java.sql.Connection con=null;Statement stmt=null;
82 BlobInputStream in; InputStream img_in = null;
85 con = theStorageObject.getPooledCon();
86 con.setAutoCommit(false);
87 LargeObjectManager lom;
88 java.sql.Connection jCon;
89 stmt = con.createStatement();
90 ResultSet rs = theStorageObject.executeSql(stmt,
91 "select image_data from images where id="+getId());
92 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
93 .getNativeConnection();
94 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
97 LargeObject lob = lom.open(rs.getInt(1));
98 in = (BlobInputStream)lob.getInputStream();
99 img_in = new ImageInputStream(in, con, stmt);
103 } catch (Exception e) {
105 theLog.printError("EntityImages -- getImage failed"+e.toString());
107 con.setAutoCommit(true);
108 } catch (Exception e2) {
111 "EntityImages -- getImage reseting transaction mode failed"
114 theStorageObject.freeConnection(con,stmt);
115 throwStorageObjectException(e, "EntityImages -- getImage failed: ");
121 public void setImage(InputStream in, String type)
122 throws StorageObjectException {
125 java.sql.Connection con=null;PreparedStatement pstmt=null;
129 theLog.printDebugInfo("settimage :: making internal representation of image");
131 File tempDir = new File(MirConfig.getProp("TempDir"));
132 f = File.createTempFile("mir", ".tmp", tempDir);
133 FileUtil.write(f, in);
134 WebdbImage webdbImage= new WebdbImage(f, type);
135 theLog.printDebugInfo("settimage :: made internal representation of image");
137 con = theStorageObject.getPooledCon();
138 con.setAutoCommit(false);
139 theLog.printDebugInfo("settimage :: trying to insert image");
142 LargeObjectManager lom;
143 java.sql.Connection jCon;
144 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
145 .getNativeConnection();
146 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
147 int oidImage = lom.create();
148 int oidIcon = lom.create();
149 LargeObject lobImage = lom.open(oidImage);
150 LargeObject lobIcon = lom.open(oidIcon);
151 webdbImage.setImage(lobImage.getOutputStream());
152 webdbImage.setIcon(lobIcon.getOutputStream());
156 setValueForProperty("img_height",
157 new Integer(webdbImage.getImageHeight()).toString());
158 setValueForProperty("img_width",
159 new Integer(webdbImage.getImageWidth()).toString());
160 setValueForProperty("icon_height",
161 new Integer(webdbImage.getIconHeight()).toString());
162 setValueForProperty("icon_width",
163 new Integer(webdbImage.getIconWidth()).toString());
164 setValueForProperty("image_data", new Integer(oidImage).toString());
165 setValueForProperty("icon_data", new Integer(oidIcon).toString());
168 catch (Exception e) {throwStorageObjectException(e, "settimage :: setImage gescheitert: ");}
172 con.setAutoCommit(true);
173 // get rid of the temp. file
175 } catch (Exception e) {;}
176 theStorageObject.freeConnection(con,pstmt);
182 * Takes an OutputStream as an argument and reads in the data
183 * from the DB and writes it to the OutputStream.
185 * It will also take care of closing the OutputStream.
187 public InputStream getIcon() throws StorageObjectException
189 java.sql.Connection con=null;Statement stmt=null;
190 BlobInputStream in=null;ImageInputStream img_in=null;
193 con = theStorageObject.getPooledCon();
194 con.setAutoCommit(false);
195 LargeObjectManager lom;
196 java.sql.Connection jCon;
197 stmt = con.createStatement();
198 ResultSet rs = theStorageObject.executeSql(stmt,
199 "select icon_data from images where id="+getId());
200 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
201 .getNativeConnection();
202 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
205 LargeObject lob = lom.open(rs.getInt(1));
206 in = (BlobInputStream)lob.getInputStream();
207 img_in = new ImageInputStream( in, con ,stmt);
208 //img_data = rs.getBytes(1);
212 } catch (Exception e) {
214 theLog.printError("EntityImages -- getIcon failed"+e.toString());
216 con.setAutoCommit(true);
217 } catch (Exception e2) {
220 "EntityImages -- getIcon reseting transaction mode failed"
223 theStorageObject.freeConnection(con,stmt);
224 throwStorageObjectException(e, "EntityImages -- getIcon failed:");
231 * a small wrapper class that allows us to store the DB connection resources
232 * that the BlobInputStream is using and free them upon closing of the stream
234 private class ImageInputStream extends InputStream {
237 java.sql.Connection _con;
240 public ImageInputStream(BlobInputStream in, java.sql.Connection con,
248 public void close () throws IOException {
252 _con.setAutoCommit(true);
253 theStorageObject.freeConnection(_con,_stmt);
254 } catch (Exception e) {
255 throw new IOException("close(): "+e.toString());
259 public int read() throws IOException {