JAI imageio casting problem
I recently had problems using Java Advanced Imaging (JAI).
Here is the simplified version of the problem, so we have:
Original code:
And the original exception
The problem was that I was missing that sometime the class is loaded by different class loader and it can happen that the casted class is not the same whit the one form the default class loader. Now this would have been obvious if it was in two different vm's , or maybe some object received via de/serialization ...
The question on StackOverflow
Here is the simplified version of the problem, so we have:
SomeClass c = (SomeClass) obj.getSomeClassParent()
org.somepackage.SomeClass can't be cast to org.somepackage.SomeClass
Original code:
ImageInputStream iis = ImageIO.createImageInputStream(src);
Iterator iter = ImageIO.getImageReadersByFormatName("DICOM");
ImageReader reader = iter.next();
DicomImageReadParam param = (DicomImageReadParam) reader.getDefaultReadParam();
And the original exception
org.dcm4che2.imageio.plugins.dcm.DicomImageReadParam can't be cast to
org.dcm4che2.imageio.plugins.dcm.DicomImageReadParam The problem was that I was missing that sometime the class is loaded by different class loader and it can happen that the casted class is not the same whit the one form the default class loader. Now this would have been obvious if it was in two different vm's , or maybe some object received via de/serialization ...
The question on StackOverflow
