agarrison

Since virtualization is part of jasper reports, all of it should be serializable, especially something as vital as the JRBaseDataset. Further, I don't know how many pages my report is at runtime. I found this problem on a 3 page report, but it could just as easily be a 300 page report.

I have a report that contains a subreport in the detail section. This report works fine in most cases - it generates a 3 page report. Once I add swap file virtualization, I get a NullPointerException when de-serializing the object. Based on the stack trace and the class, it appears that the reason is that some of the array fields are null (unitialized). Any one else have this problem or have a solution? Thanks java.lang.NullPointerException at java.lang.reflect.Array.newArray(Native Method) at java.lang.reflect.Array.newInstance(Array.java:70) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1670) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1344) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500) at net.sf.jasperreports.engine.base.JRBaseDataset.readObject(JRBaseDataset.java:356) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500) at net.sf.jasperreports.engine.base.JRBaseReport.readObject(JRBaseReport.java:799) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) at java.util.HashMap.readObject(HashMap.java:1184) at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:120) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:105) at net.sf.jasperreports.engine.fill.JRTemplatePrintImage.readVirtualized(JRTemplatePrintImage.java:538) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:119) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:35) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:137) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:105) at net.sf.jasperreports.engine.base.VirtualElementsData.readVirtualized(VirtualElementsData.java:179) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:119) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:35) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:137) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:105) at net.sf.jasperreports.engine.util.VirtualizationSerializer.readData(VirtualizationSerializer.java:136) at net.sf.jasperreports.engine.util.SwapFileVirtualizerStore.retrieve(SwapFileVirtualizerStore.java:137) at net.sf.jasperreports.engine.fill.StoreVirtualizer.pageIn(StoreVirtualizer.java:62) at net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer.requestData(JRAbstractLRUVirtualizer.java:536) at net.sf.jasperreports.engine.base.ElementsBlock.ensureData(VirtualizableElementList.java:463) at net.sf.jasperreports.engine.base.ElementsBlock.ensureDataAndTouch(VirtualizableElementList.java:432) at net.sf.jasperreports.engine.base.ElementsBlock.get(VirtualizableElementList.java:283) at net.sf.jasperreports.engine.base.VirtualizableElementList.get(VirtualizableElementList.java:96) at net.sf.jasperreports.engine.base.VirtualizableElementList.get(VirtualizableElementList.java:54) at java.util.AbstractList$Itr.next(AbstractList.java:358)

I have a report that contains a subreport in the detail section. It renders fine, until I try to use swap file virtualization. Then I get a null pointer exception. java.lang.NullPointerException at java.lang.reflect.Array.newArray(Native Method) at java.lang.reflect.Array.newInstance(Array.java:70) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1670) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1344) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500) at net.sf.jasperreports.engine.base.JRBaseDataset.readObject(JRBaseDataset.java:356) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:500) at net.sf.jasperreports.engine.base.JRBaseReport.readObject(JRBaseReport.java:799) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) at java.util.HashMap.readObject(HashMap.java:1184) at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:120) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:105) at net.sf.jasperreports.engine.fill.JRTemplatePrintImage.readVirtualized(JRTemplatePrintImage.java:538) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:119) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:35) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:137) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:105) at net.sf.jasperreports.engine.base.VirtualElementsData.readVirtualized(VirtualElementsData.java:179) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:119) at net.sf.jasperreports.engine.virtualization.SerializableSerializer.read(SerializableSerializer.java:35) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:137) at net.sf.jasperreports.engine.virtualization.VirtualizationInput.readJRObject(VirtualizationInput.java:105) at net.sf.jasperreports.engine.util.VirtualizationSerializer.readData(VirtualizationSerializer.java:136) at net.sf.jasperreports.engine.util.SwapFileVirtualizerStore.retrieve(SwapFileVirtualizerStore.java:137) at net.sf.jasperreports.engine.fill.StoreVirtualizer.pageIn(StoreVirtualizer.java:62) at net.sf.jasperreports.engine.fill.JRAbstractLRUVirtualizer.requestData(JRAbstractLRUVirtualizer.java:536) at net.sf.jasperreports.engine.base.ElementsBlock.ensureData(VirtualizableElementList.java:463) at net.sf.jasperreports.engine.base.ElementsBlock.ensureDataAndTouch(VirtualizableElementList.java:432) at net.sf.jasperreports.engine.base.ElementsBlock.get(VirtualizableElementList.java:283) at net.sf.jasperreports.engine.base.VirtualizableElementList.get(VirtualizableElementList.java:96) at net.sf.jasperreports.engine.base.VirtualizableElementList.get(VirtualizableElementList.java:54) at java.util.AbstractList$Itr.next(AbstractList.java:358)

I'm also having the same problem. Can you help me out.

I've created a simple subreport where the page size is 300 by 300. Next I create a simple report. I set all of the band heights to 0 except for the summary band. The page is set to Letter (portrait) size with margins of 10 on the left, 12 on the top and 0 right and bottom. I add the subreport to the summary band. If I set the summary band height to 500, the subreport shows up. As I increase the size of the summary band, however, I start seeing that the band overflows. In this example, when the subreport is set to be 669 is when the overflow happens. In the debugger I see that the actual height of the subreport is 114. Looking at the code, it seems that the availableStretch parameter to the JRFillBand.fill method decreases with an increase in the actual band height. It also seems that the fill doesn't take into account the actual height of the band. So as the availableStretch gets smaller, elements that fit easily in the band don't seem to fit at all. I need to increase the band height so that I can add more elements to the summary band. All of the elements will fit both vertically and horizontally on a page. Am I doing something wrong? Thanks for your help

I've created a custom property on a text field. I can see the property in the .jrxml file. The property also appears in the .jasper file when I view it in iReport. Here is a snippet of the JRXML with the property I created in bold <textField isStretchWithOverflow="true" isBlankWhenNull="true"> <reportElement style="GBBASE" positionType="Float" stretchType="RelativeToTallestObject" mode="Opaque" x="0" y="20" width="100" height="13" forecolor="#033D3D" backcolor="#E6E6E6"> <property name="ReportIndex" value="1"/> </reportElement> <box leftPadding="2" rightPadding="2"/> <textElement textAlignment="Left"> <font fontName="Arial" size="8" isBold="false" isItalic="false"/> </textElement> <textFieldExpression class="java.lang.String"><![CDATA["CategoryName"]]></textFieldExpression> </textField> However, when I try to use that property in the exporter, I can't find it at all. It does not appear to be associated with the JRTemplatePrintText object that is stored in the JRPage. How can I get that property when I'm in the Exporter? I am using JasperReports 3.1.3. Thanks