Examples of javax.media.jai.util.ImagingListener

javax.media.jai.util.ImagingListener
An ImagingListener has the capability to report the abnormal situations in the image processing procedures. The concrete class either holds the reported information and processes it, or passes them to other processing or logging mechanisms.
A default ImagingListener resides in an instance of JAI (by calling the method setImagingListener), and can be retrieved by calling the method getImagingListener. This listener should not propagate the Throwable reported from an OperationRegistry. Otherwise, it may break the loop through the image factories. The typical JAI to be used will be the default JAI instance.
An ImagingListener can also be attached to a rendering node as a rendering hint with a key JAI.KEY_IMAGING_LISTENER. This listener can monitor errors occurring in the rendering process. The default value for this rendering hint is the listener registered to the default JAI instance.
The typical situations where ImagingListener objects can be called are: (1) The create method of a concrete RenderedImageFactory or ContextualRenderedImageFactory. (2) The rendering of the node. For the latter case, the I/O, network, and arithmetic problems will be reported.
When errors are encountered in user-written operations, those operations have two choices. The typical choice will be to simply throw an exception and let the JAI framework call errorOccurred. However, it is also acceptable to obtain the proper ImagingListener and call errorOccurred directly. This might be useful if for example special retry options were available to the user operation. Care should be taken in this case to avoid an infinite retry loop.
For backward compatibility, an instance of a simple implementation of this interface is used as the default in all the JAI instances. It re-throws the Throwable if it is a RuntimeException. For the other types of Throwable, it only prints the message and the stack trace to the stream System.err, and returns false. To process the reported errors or warnings an alternate implementation of ImagingListener should be written.

The provided Throwable, its cause, or its root cause may be re-thrown directly, or wrapped into a subclass of RuntimeException and thrown if this listener cannot handle it properly, in which case the Throwable will be propogated back to the calling application.
In the JAI 1.1.2 implementation from Sun, when the method errorOccurred is called, the parameter isRetryable is always false; future implementations may activate retry capability.
@since JAI 1.1.2

/*      */     }
/* 1510 */     return new BigInteger(uid);
/*      */   }
/*      */ 
/*      */   static void sendExceptionToListener(String message, Exception e) {
/* 1514 */     ImagingListener listener = getImagingListener((RenderingHints)null);
/*      */ 
/* 1516 */     listener.errorOccurred(message, e, ImageUtil.class, false);
/*      */   }

View Full Code Here

/*     */ 
/*     */ public class CodecRIFUtil
/*     */ {
/*     */   public static RenderedImage create(String type, ParameterBlock paramBlock, RenderingHints renderHints)
/*     */   {
/*  46 */     ImagingListener listener = ImageUtil.getImagingListener(renderHints);
/*     */ 
/*  48 */     SeekableStream source = (SeekableStream)paramBlock.getObjectParameter(0);
/*     */ 
/*  51 */     ImageDecodeParam param = null;
/*  52 */     if (paramBlock.getNumParameters() > 1) {
/*  53 */       param = (ImageDecodeParam)paramBlock.getObjectParameter(1);
/*     */     }
/*  55 */     int page = 0;
/*  56 */     if (paramBlock.getNumParameters() > 2) {
/*  57 */       page = paramBlock.getIntParameter(2);
/*     */     }
/*     */ 
/*  60 */     ImageDecoder dec = ImageCodec.createImageDecoder(type, source, param);
/*     */     try {
/*  62 */       int bound = 2;
/*  63 */       ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);
/*     */ 
/*  65 */       if (renderHints != null)
/*     */       {
/*  68 */         RenderingHints.Key key = JAI.KEY_OPERATION_BOUND;
/*  69 */         if (renderHints.containsKey(key)) {
/*  70 */           bound = ((Integer)renderHints.get(key)).intValue();
/*     */         }
/*     */ 
/*     */       }
/*     */ 
/*  77 */       boolean canAttemptRecovery = source.canSeekBackwards();
/*     */ 
/*  80 */       long streamPosition = -9223372036854775808L;
/*  81 */       if (canAttemptRecovery) {
/*     */         try {
/*  83 */           streamPosition = source.getFilePointer();
/*     */         } catch (IOException ioe) {
/*  85 */           listener.errorOccurred(JaiI18N.getString("StreamRIF1"), ioe, CodecRIFUtil.class, false);
/*     */ 
/*  89 */           canAttemptRecovery = false;
/*     */         }
/*     */       }
/*     */ 
/*  93 */       OpImage image = null;
/*     */       try
/*     */       {
/*  96 */         image = new NullOpImage(dec.decodeAsRenderedImage(page), layout, renderHints, bound);
/*     */       }
/*     */       catch (OutOfMemoryError memoryError)
/*     */       {
/* 104 */         if (canAttemptRecovery)
/*     */         {
/* 106 */           TileCache cache = image != null ? image.getTileCache() : RIFUtil.getTileCacheHint(renderHints);
/*     */ 
/* 109 */           if (cache != null) {
/* 110 */             cache.flush();
/*     */           }
/*     */ 
/* 114 */           System.gc();
/*     */ 
/* 117 */           source.seek(streamPosition);
/*     */ 
/* 120 */           image = new NullOpImage(dec.decodeAsRenderedImage(page), layout, renderHints, bound);
/*     */         }
/*     */         else
/*     */         {
/* 126 */           String message = JaiI18N.getString("CodecRIFUtil0");
/* 127 */           listener.errorOccurred(message, new ImagingException(message, memoryError), CodecRIFUtil.class, false);
/*     */         }
/*     */ 
/*     */       }
/*     */ 
/* 135 */       return image;
/*     */     } catch (Exception e) {
/* 137 */       listener.errorOccurred(JaiI18N.getString("CodecRIFUtil1"), e, CodecRIFUtil.class, false);
/*     */     }
/*     */ 
/* 140 */     return null;
/*     */   }

View Full Code Here

/*    */     try {
/* 87 */       op = new MlibHistogramOpImage(src, xPeriod, yPeriod, numBins, lowValueFP, highValueFP);
/*    */     }
/*    */     catch (Exception e)
/*    */     {
/* 91 */       ImagingListener listener = ImageUtil.getImagingListener(hints);
/* 92 */       String message = JaiI18N.getString("MlibHistogramRIF0");
/* 93 */       listener.errorOccurred(message, e, this, false);
/*    */     }
/*    */ 
/* 96 */     return op;
/*    */   }

View Full Code Here

/*     */     {
/*  83 */       Object object = ois.readObject();
/*  84 */       return TileCodecUtils.deserializeRaster(object);
/*     */     }
/*     */     catch (ClassNotFoundException e) {
/*  87 */       ImagingListener listener = ImageUtil.getImagingListener((RenderingHints)null);
/*     */ 
/*  89 */       listener.errorOccurred(JaiI18N.getString("ClassNotFound"), e, this, false);
/*     */ 
/*  93 */       return null;
/*     */     }
/*     */     finally {
/*  96 */       ois.close();

View Full Code Here

/* 106 */       sm = TileCodecUtils.deserializeSampleModel(ois.readObject());
/* 107 */       location = (Point)ois.readObject();
/* 108 */       data = (byte[])ois.readObject();
/*     */     }
/*     */     catch (ClassNotFoundException e) {
/* 111 */       ImagingListener listener = ImageUtil.getImagingListener((RenderingHints)null);
/*     */ 
/* 113 */       listener.errorOccurred(JaiI18N.getString("ClassNotFound"), e, this, false);
/*     */ 
/* 116 */       return null;
/*     */     }
/*     */     finally {
/* 119 */       ois.close();

View Full Code Here

/*      */     }
/*      */   }
/*      */ 
/*      */   void sendExceptionToListener(String message, Throwable e)
/*      */   {
/* 1652 */     ImagingListener listener = ImageUtil.getImagingListener((RenderingHints)null);
/*      */ 
/* 1654 */     listener.errorOccurred(message, e, this, false);
/*      */   }

View Full Code Here

/* 1095 */       System.out.println(ct);
/*      */     }
/*      */   }
/*      */ 
/*      */   void sendExceptionToListener(String message, Exception e) {
/* 1100 */     ImagingListener listener = ImageUtil.getImagingListener((RenderingHints)null);
/*      */ 
/* 1102 */     listener.errorOccurred(message, e, this, false);
/*      */   }

View Full Code Here

/*      */   {
/* 2871 */     return this.imagingListener;
/*      */   }
/*      */ 
/*      */   private void sendExceptionToListener(String message, Exception e) {
/* 2875 */     ImagingListener listener = getImagingListener();
/* 2876 */     listener.errorOccurred(message, e, this, false);
/*      */   }

View Full Code Here

/* 50 */       Class[] paramTypes = { ParameterBlock.class };
/*    */ 
/* 53 */       factoryMethod = factoryClass.getMethod("create", paramTypes);
/*    */     }
/*    */     catch (NoSuchMethodException e) {
/* 56 */       ImagingListener listener = JAI.getDefaultInstance().getImagingListener();
/*    */ 
/* 58 */       String message = JaiI18N.getString("RegistryMode0") + " " + factoryClass.getName() + ".";
/*    */ 
/* 60 */       listener.errorOccurred(message, e, RenderableCollectionRegistryMode.class, false);
/*    */     }
/*    */ 
/* 65 */     return factoryMethod;
/*    */   }

View Full Code Here

/* 51 */       Class[] paramTypes = { RenderContext.class, ParameterBlock.class };
/*    */ 
/* 55 */       factoryMethod = factoryClass.getMethod("create", paramTypes);
/*    */     }
/*    */     catch (NoSuchMethodException e) {
/* 58 */       ImagingListener listener = JAI.getDefaultInstance().getImagingListener();
/*    */ 
/* 60 */       String message = JaiI18N.getString("RegistryMode0") + " " + factoryClass.getName() + ".";
/*    */ 
/* 62 */       listener.errorOccurred(message, e, RenderableRegistryMode.class, false);
/*    */     }
/*    */ 
/* 67 */     return factoryMethod;
/*    */   }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of javax.media.jai.util.ImagingListener

com.sun.media.jai.codecimpl.util.ImageUtil

com.sun.media.jai.codecimpl.util.SunTileCache

com.sun.media.jai.codecimpl.util.SunTileScheduler

com.sun.media.jai.mlib.MediaLibAccessor

com.sun.media.jai.mlib.MlibHistogramRIF

com.sun.media.jai.opimage.CodecRIFUtil

com.sun.media.jai.opimage.EncodeRIF

com.sun.media.jai.opimage.FileLoadRIF

com.sun.media.jai.opimage.FileStoreRIF

com.sun.media.jai.opimage.HistogramRIF

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.