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 any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
31 package mircoders.entity;
34 import java.io.IOException;
35 import java.io.InputStream;
36 import java.sql.Connection;
37 import java.sql.PreparedStatement;
38 import java.sql.ResultSet;
39 import java.sql.SQLException;
40 import java.sql.Statement;
42 import mir.config.MirPropertiesConfiguration;
43 import mir.log.LoggerWrapper;
44 import mir.misc.FileUtil;
45 import mir.storage.StorageObject;
46 import mir.storage.StorageObjectFailure;
47 import mircoders.media.ImageProcessor;
49 import org.postgresql.largeobject.BlobInputStream;
50 import org.postgresql.largeobject.LargeObject;
51 import org.postgresql.largeobject.LargeObjectManager;
55 * @author RK, mh, mir-coders
56 * @version $Id: EntityImages.java,v 1.21.2.4 2004/01/18 17:30:58 zapata Exp $
60 public class EntityImages extends EntityUploadedMedia
62 private int maxImageSize = configuration.getInt("Producer.Image.MaxSize");
63 private int maxIconSize = configuration.getInt("Producer.Image.MaxIconSize");
64 private float minDescaleRatio = configuration.getFloat("Producer.Image.MinDescalePercentage")/100;
65 private int minDescaleReduction = configuration.getInt("Producer.Image.MinDescaleReduction");
72 logger = new LoggerWrapper("Entity.UploadedMedia.Images");
75 public EntityImages(StorageObject theStorage) {
77 setStorage(theStorage);
84 public InputStream getImage() throws StorageObjectFailure {
85 logger.debug("EntityImages.getimage started");
86 java.sql.Connection con=null;
89 InputStream img_in = null;
92 con = storageObject.getPooledCon();
93 con.setAutoCommit(false);
94 LargeObjectManager lom;
95 java.sql.Connection jCon;
96 stmt = con.createStatement();
97 ResultSet rs = storageObject.executeSql(stmt,
98 "select image_data from images where id="+getId());
99 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
100 .getNativeConnection();
101 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
104 LargeObject lob = lom.open(rs.getInt(1));
105 in = (BlobInputStream)lob.getInputStream();
106 img_in = new ImageInputStream(in, con, stmt);
111 catch (Throwable t) {
112 logger.error("EntityImages.getImage failed: " + t.toString());
113 t.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
116 con.setAutoCommit(true);
118 catch (Throwable e) {
119 logger.error("EntityImages.getImage resetting transaction mode failed: " + e.toString());
120 e.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
124 storageObject.freeConnection(con, stmt);
126 catch (Throwable e) {
127 logger.error("EntityImages.getImage freeing connection failed: " +e.toString());
130 throw new StorageObjectFailure(t);
136 public void setImage(InputStream in, String type) throws StorageObjectFailure {
137 // todo: failures should be treated in a better way: exception -> rollback instead
141 Connection con = null;
142 PreparedStatement pstmt = null;
145 logger.debug("EntityImages.settimage :: making internal representation of image");
147 f = File.createTempFile("mir", ".tmp",
148 new File(MirPropertiesConfiguration.instance().getString("TempDir")));
149 FileUtil.write(f, in);
150 ImageProcessor processor = new ImageProcessor(f);
152 con = storageObject.getPooledCon();
153 con.setAutoCommit(false);
154 LargeObjectManager lom;
155 java.sql.Connection connection;
156 connection = ((com.codestudio.sql.PoolManConnectionHandle)con).getNativeConnection();
158 lom = ((org.postgresql.Connection) connection).getLargeObjectAPI();
160 int oidImage = lom.create();
161 LargeObject lobImage = lom.open(oidImage);
162 processor.descaleImage(maxImageSize, minDescaleRatio, minDescaleReduction);
163 processor.writeScaledData(lobImage.getOutputStream(), type);
165 setFieldValue("img_height", new Integer(processor.getScaledHeight()).toString());
166 setFieldValue("img_width", new Integer(processor.getScaledWidth()).toString());
168 int oidIcon = lom.create();
169 LargeObject lobIcon = lom.open(oidIcon);
170 processor.descaleImage(maxIconSize, minDescaleRatio, minDescaleReduction);
171 processor.writeScaledData(lobIcon.getOutputStream(), type);
174 setFieldValue("icon_height", new Integer(processor.getScaledHeight()).toString());
175 setFieldValue("icon_width", new Integer(processor.getScaledWidth()).toString());
177 setFieldValue("image_data", new Integer(oidImage).toString());
178 setFieldValue("icon_data", new Integer(oidIcon).toString());
181 catch (Exception e) {
182 throw new StorageObjectFailure(e);
187 con.setAutoCommit(true);
188 // get rid of the temp. file
190 catch (Throwable e) {
191 logger.error("EntityImages.setImage: unable to reset the connection to auto-commit:" + e.toString());
196 catch (Throwable t) {
197 logger.error("EntityImages.setImage: unable to delete the temporary file:" + t.toString());
202 storageObject.freeConnection(con,pstmt);
204 catch (Throwable t) {
205 logger.error("EntityImages.setImage: unable to free the connection:" + t.toString());
212 * Takes an OutputStream as an argument and reads in the data
213 * from the DB and writes it to the OutputStream.
215 * It will also take care of closing the OutputStream.
217 public InputStream getIcon() throws StorageObjectFailure {
220 BlobInputStream in=null;
221 ImageInputStream img_in=null;
224 con = storageObject.getPooledCon();
225 con.setAutoCommit(false);
226 LargeObjectManager lom;
227 java.sql.Connection jCon;
228 stmt = con.createStatement();
229 ResultSet rs = storageObject.executeSql(stmt, "select icon_data from images where id="+getId());
230 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
231 .getNativeConnection();
232 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
235 LargeObject lob = lom.open(rs.getInt(1));
236 in = (BlobInputStream)lob.getInputStream();
237 img_in = new ImageInputStream( in, con ,stmt);
238 //img_data = rs.getBytes(1);
243 catch (Throwable t) {
244 logger.error("EntityImages.getIcon failed: "+t.toString());
245 t.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
248 con.setAutoCommit(true);
250 catch (SQLException e) {
251 logger.error("EntityImages.getIcon resetting transaction mode failed: " + e.toString());
252 e.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
255 storageObject.freeConnection(con, stmt);
257 catch (Throwable e) {
258 logger.error("EntityImages -- freeing connection failed: " + e.getMessage());
261 throw new StorageObjectFailure(t);
268 * a small wrapper class that allows us to store the DB connection resources
269 * that the BlobInputStream is using and free them upon closing of the stream
271 private class ImageInputStream extends InputStream {
277 public ImageInputStream(BlobInputStream in, Connection con,
284 public void close () throws IOException {
287 _con.setAutoCommit(true);
288 storageObject.freeConnection(_con,_stmt);
290 catch (Exception e) {
291 throw new IOException("close(): "+e.toString());
295 public int read() throws IOException {