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https://issues.apache.org/jira/browse/AXIS2-4026?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Detelin Yordanov updated AXIS2-4026:
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Attachment: httplog.txt
stacktrace.txt
Http request response and stacktrace.
> ClassCastException when serializing simple-typed multidimensional array bean
> fields
> -----------------------------------------------------------------------------------
>
> Key: AXIS2-4026
> URL: https://issues.apache.org/jira/browse/AXIS2-4026
> Project: Axis 2.0 (Axis2)
> Issue Type: Bug
> Components: adb
> Affects Versions: nightly
> Environment: Tomcat 5.5.26, JDK 1.5.0_11
> Reporter: Detelin Yordanov
> Attachments: EchoService.aar, httplog.txt, stacktrace.txt
>
>
> Hi guys,
> I found a problem in the latest multidimensional array support stuff added
> by Amila. The problem appears when serializing a response bean containing
> a simple-typed multidimensional array field, e.g.:
> public class SimpleBean {
> public int[][] numbers;
> public int[][] getNumbers() {
> return numbers;
> }
> public void setNumbers(int[][] numbers) {
> this.numbers = numbers;
> }
> }
> When serializing this to XML on the server side an exception gets thrown:
> Caused by: java.lang.ClassCastException: [I
> at
> org.apache.axis2.databinding.utils.reader.ADBXMLStreamReaderImpl.processProperties(ADBXMLStreamReaderImpl.java:948)
> at
> org.apache.axis2.databinding.utils.reader.ADBXMLStreamReaderImpl.next(ADBXMLStreamReaderImpl.java:833)
> at org.apache.axis2.util.StreamWrapper.next(StreamWrapper.java:71)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:506)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:161)
> The reason for this seems to be the code in the ADBXMLStreamReaderImpl that
> handles array types:
> } else if (propertyValue.getClass().isArray()) {
> // this is an arrary object and we need to get the pull parser
> for that
> Object[] objectArray = (Object[]) propertyValue;
> if (objectArray.length == 0) {
> //advance the index
> currentPropertyIndex = currentPropertyIndex + 2;
> return processProperties();
> } else {
> The propertyValue here happens to be int[], and trying to cast it to Object[]
> causes the exception.
> The real reason for propertyValue being int[] (not Integer[] for example) is
> hidden in the BeanUtils.getPullParser(..) method where array fields are
> handled:
> (See line 164 of BeanUtil.java at rev 692771):
> Object value;
> if (readMethod != null) {
> readMethod.setAccessible(true);
> value = readMethod.invoke(beanObject, null);
> }
> The problem is due to a subtle change in the Java reflection API from 1.4.2
> to 1.5.0, in 1.5.0 a new sentence appears describing the return type:
> "If the method completes normally, the value it returns is returned to the
> caller of invoke; if the value has a primitive type, it is first
> appropriately wrapped in an
> object. However, if the value has the type of an array of a primitive type,
> the elements of the array are not wrapped in objects; in other words, an
> array of
> primitive type is returned."
> This means that when reading int[][] { new int[] {1, 2}, new int[] {3, 4} }
> and converting this to Object[], we get e.g.
> new Object[] { int[] {1, 2}, new int[] {3, 4} },
> here the elements in the Object array are one dimensional arrays of int and
> this is OK (these elements are Objects), but when trying to cast each element
> to one dimensional array of Object in the ADBXMLStreamReaderImpl we got the
> ClassCastException since this conversion is not possible, e.g. :
> Object[] objArray = new Object[] { int[] {1, 2}, new int[] {3, 4} };
> Object obj = objArray[0]; //FINE
> Object[] intArray = (Object[])objArray[0]; //ClassCastException
> It seems that some additional checks for primitive typed arrays are required.
> Regards,
> Detelin
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