Mercurial > hg > digilib-old
view servlet/src/digilib/image/DocuImageImpl.java @ 20:d407cb901df4
Initial revision
author | robcast |
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date | Thu, 17 Jan 2002 15:29:55 +0100 |
parents | 0ff3ede32060 |
children | 3b8797fc3e90 9cedd170b581 |
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/* DocuImage -- General image interface class implementation Digital Image Library servlet components Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Please read license.txt for the full details. A copy of the GPL may be found at http://www.gnu.org/copyleft/lgpl.html You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package digilib.image; import java.io.*; import javax.servlet.ServletResponse; import digilib.*; import digilib.io.*; public abstract class DocuImageImpl implements DocuImage { protected Utils util = null; public DocuImageImpl() { util = new Utils(); } public DocuImageImpl(Utils u) { util = u; } public void setUtils(Utils u) { util = u; } protected String[] knownFileTypes = {"jpg", "png", "gif", "tiff"}; public String[] getKnownFileTypes() { return knownFileTypes; } /** * send an image file as-is */ public void sendFile(File f, ServletResponse response) throws FileOpException { util.dprintln(4, "sendFile("+f+")"); String mimeType = FileOps.mimeForFile(f); if (mimeType == null) { util.dprintln(2, "ERROR(sendFile): unknown file Type"); throw new FileOpException("Unknown file type."); } response.setContentType(mimeType); // open file try { FileInputStream inFile = new FileInputStream(f); OutputStream outStream = response.getOutputStream(); byte dataBuffer[] = new byte[1024]; int len; while ((len = inFile.read(dataBuffer)) != -1) { // copy out file outStream.write(dataBuffer, 0, len); } inFile.close(); } catch (IOException e) { util.dprintln(2, "ERROR(sendFile): unable to send file"); throw new FileOpException("Unable to send file."); } } public abstract void loadImage(File f) throws FileOpException; public abstract void writeImage(String mt, ServletResponse res) throws FileOpException; public abstract int getWidth(); public abstract int getHeight(); public abstract void cropAndScale(int x_off, int y_off, int width, int height, float scale, int qual) throws ImageOpException; }