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 1.21.2.3 2003/12/14 16:37:07 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;
91 con = theStorageObject.getPooledCon();
92 con.setAutoCommit(false);
93 LargeObjectManager lom;
94 java.sql.Connection jCon;
95 stmt = con.createStatement();
96 ResultSet rs = theStorageObject.executeSql(stmt,
97 "select image_data from images where id="+getId());
98 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
99 .getNativeConnection();
100 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
103 LargeObject lob = lom.open(rs.getInt(1));
104 in = (BlobInputStream)lob.getInputStream();
105 img_in = new ImageInputStream(in, con, stmt);
110 catch (Throwable t) {
111 logger.error("EntityImages.getImage failed: " + t.toString());
112 t.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
115 con.setAutoCommit(true);
117 catch (Throwable e) {
118 logger.error("EntityImages.getImage resetting transaction mode failed: " + e.toString());
119 e.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
123 theStorageObject.freeConnection(con, stmt);
125 catch (Throwable e) {
126 logger.error("EntityImages.getImage freeing connection failed: " +e.toString());
129 throwStorageObjectFailure(t, "EntityImages -- getImage failed: ");
134 public void setImage(InputStream in, String type) throws StorageObjectFailure {
138 Connection con = null;
139 PreparedStatement pstmt = null;
142 logger.debug("EntityImages.settimage :: making internal representation of image");
144 f = File.createTempFile("mir", ".tmp",
145 new File(MirPropertiesConfiguration.instance().getString("TempDir")));
146 FileUtil.write(f, in);
147 ImageProcessor processor = new ImageProcessor(f);
149 con = theStorageObject.getPooledCon();
150 con.setAutoCommit(false);
151 LargeObjectManager lom;
152 java.sql.Connection connection;
153 connection = ((com.codestudio.sql.PoolManConnectionHandle)con).getNativeConnection();
155 lom = ((org.postgresql.Connection) connection).getLargeObjectAPI();
157 int oidImage = lom.create();
158 LargeObject lobImage = lom.open(oidImage);
159 processor.descaleImage(maxImageSize, minDescaleRatio, minDescaleReduction);
160 processor.writeScaledData(lobImage.getOutputStream(), type);
162 setValueForProperty("img_height", new Integer(processor.getScaledHeight()).toString());
163 setValueForProperty("img_width", new Integer(processor.getScaledWidth()).toString());
165 int oidIcon = lom.create();
166 LargeObject lobIcon = lom.open(oidIcon);
167 processor.descaleImage(maxIconSize, minDescaleRatio, minDescaleReduction);
168 processor.writeScaledData(lobIcon.getOutputStream(), type);
171 setValueForProperty("icon_height", new Integer(processor.getScaledHeight()).toString());
172 setValueForProperty("icon_width", new Integer(processor.getScaledWidth()).toString());
174 setValueForProperty("image_data", new Integer(oidImage).toString());
175 setValueForProperty("icon_data", new Integer(oidIcon).toString());
178 catch (Exception e) {
179 throwStorageObjectFailure(e, "settimage :: setImage failed: ");
184 con.setAutoCommit(true);
185 // get rid of the temp. file
187 } catch (SQLException e) {
188 throwStorageObjectFailure(e,"Resetting transaction-mode failed");
191 theStorageObject.freeConnection(con,pstmt);
197 * Takes an OutputStream as an argument and reads in the data
198 * from the DB and writes it to the OutputStream.
200 * It will also take care of closing the OutputStream.
202 public InputStream getIcon() throws StorageObjectFailure {
205 BlobInputStream in=null;
206 ImageInputStream img_in=null;
209 con = theStorageObject.getPooledCon();
210 con.setAutoCommit(false);
211 LargeObjectManager lom;
212 java.sql.Connection jCon;
213 stmt = con.createStatement();
214 ResultSet rs = theStorageObject.executeSql(stmt, "select icon_data from images where id="+getId());
215 jCon = ((com.codestudio.sql.PoolManConnectionHandle)con)
216 .getNativeConnection();
217 lom = ((org.postgresql.Connection)jCon).getLargeObjectAPI();
220 LargeObject lob = lom.open(rs.getInt(1));
221 in = (BlobInputStream)lob.getInputStream();
222 img_in = new ImageInputStream( in, con ,stmt);
223 //img_data = rs.getBytes(1);
228 catch (Throwable t) {
229 logger.error("EntityImages.getIcon failed: "+t.toString());
230 t.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
233 con.setAutoCommit(true);
235 catch (SQLException e) {
236 logger.error("EntityImages.getIcon resetting transaction mode failed: " + e.toString());
237 e.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
240 theStorageObject.freeConnection(con, stmt);
242 catch (Throwable e) {
243 logger.error("EntityImages -- freeing connection failed: " + e.getMessage());
246 throwStorageObjectFailure(t, "EntityImages -- getIcon failed:");
253 * a small wrapper class that allows us to store the DB connection resources
254 * that the BlobInputStream is using and free them upon closing of the stream
256 private class ImageInputStream extends InputStream {
262 public ImageInputStream(BlobInputStream in, Connection con,
269 public void close () throws IOException {
272 _con.setAutoCommit(true);
273 theStorageObject.freeConnection(_con,_stmt);
275 catch (Exception e) {
276 throw new IOException("close(): "+e.toString());
280 public int read() throws IOException {