bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/ImageBundleFactory.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.g2d.image.impl;\r
  13 \r
  14 import java.net.URL;\r
  15 \r
  16 import org.eclipse.core.runtime.FileLocator;\r
  17 import org.eclipse.core.runtime.IPath;\r
  18 import org.eclipse.core.runtime.Path;\r
  19 import org.eclipse.core.runtime.Platform;\r
  20 import org.osgi.framework.Bundle;\r
  21 import org.simantics.g2d.image.Image;\r
  22 import org.simantics.g2d.image.ImageUtils;\r
  23 import org.simantics.utils.datastructures.cache.IFactory;\r
  24 \r
  25 /**\r
  26  * Lazy initialization of bundle resources.\r
  27  * This class is capable of opening .svg .png .jpg etc files.\r
  28  * \r
  29  * @See {@link ImageUtils}\r
  30  * @author Toni Kalajainen\r
  31  */\r
  32 public class ImageBundleFactory extends ImageURLFactory implements IFactory<Image> {\r
  33 \r
  34         private static URL _resolveFilename(String filename)\r
  35         throws RuntimeException\r
  36         {\r
  37                 IPath p = new Path(filename);\r
  38                 String bundleId = p.segment(0);\r
  39                 IPath bundlePath = p.removeFirstSegments(1);            \r
  40                 Bundle bundle = Platform.getBundle(bundleId);\r
  41                 URL url = FileLocator.find(bundle, bundlePath, null);\r
  42                 if (url==null) \r
  43                 throw new RuntimeException("File '" + bundlePath + "' not found in bundle '" + bundleId + "'");\r
  44                 return url;\r
  45         }\r
  46         \r
  47         public ImageBundleFactory(String filename) \r
  48         throws RuntimeException\r
  49         {\r
  50                 super(_resolveFilename(filename));              \r
  51         }\r
  52         \r
  53 }\r