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Java Source | 1997-01-27 | 2.2 KB | 66 lines |
- /*
- * @(#)FileImageSource.java 1.9 95/12/14 Jim Graham
- *
- * Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- */
-
- package sun.awt.image;
-
- import java.io.InputStream;
- import java.io.FileInputStream;
- import java.io.BufferedInputStream;
- import java.io.FileNotFoundException;
-
- public class FileImageSource extends InputStreamImageSource {
- String imagefile;
-
- public FileImageSource(String filename) {
- SecurityManager security = System.getSecurityManager();
- if (security != null) {
- security.checkRead(filename);
- }
- imagefile = filename;
- }
-
- final boolean checkSecurity(Object context, boolean quiet) {
- // File based images only ever need to be checked statically
- // when the image is retrieved from the cache.
- return true;
- }
-
- protected ImageDecoder getDecoder() {
- InputStream is;
- try {
- is = new BufferedInputStream(new FileInputStream(imagefile));
- } catch (FileNotFoundException e) {
- return null;
- }
- int suffixpos = imagefile.lastIndexOf('.');
- if (suffixpos >= 0) {
- String suffix = imagefile.substring(suffixpos+1).toLowerCase();
- if (suffix.equals("gif")) {
- return new GifImageDecoder(this, is);
- } else if (suffix.equals("jpeg") || suffix.equals("jpg") ||
- suffix.equals("jpe") || suffix.equals("jfif")) {
- return new JPEGImageDecoder(this, is);
- } else if (suffix.equals("xbm")) {
- return new XbmImageDecoder(this, is);
- }
- }
- return getDecoder(is);
- }
- }
-