Null Pointer when adding image

[2006 IR Open Dicussion]

By: Michael Boeni - mbo

Null Pointer when adding image

2006-03-20 08:36

Hi all

 

I am trying to insert a chart into a report by handing over a "java.awt.Image" as a parameter. No matter what I do, I get the following exception:

 

---Exception---

Uncaught error fetching image:

java.lang.NullPointerException

at sun.awt.image.URLImageSource.getConnection(URLImageSource.java:99)

at sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:108)

at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:248)

at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)

at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)

java.lang.IllegalArgumentException: Width (-1) and height (-1) cannot be <= 0

at java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:999)

---><---

 

I use the following code to read the image:

 

--- Get the image ---

image = Toolkit.getDefaultToolkit().getImage(getClass().getResource("D:\alienbrain\work\jasper_testing\jasper_testing\sample_reports\logo.jpg"));

---><---

 

And the following code is used to fill and show the report:

 

--- Fill/Show Report ---

JasperReport jasperReport;

JasperPrint jasperPrint;

try

{

 

Map parameters = new HashMap();

parameters.put("HITSChart", getImage());

 

jasperReport = JasperCompileManager.compileReport("sample_reports\connect_hits_top10.jrxml");

jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, new HITSTop10DS());

// JasperExportManager.exportReportToPdfFile(jasperPrint, "sample_reports\connect_test_report1.pdf");

JasperViewer.viewReport(jasperPrint);

}

catch (JRException ex)

{

ex.printStackTrace();

}

---><---

 

And here is the report I am using:

 

--- Report ---

<?xml version="1.0" encoding="UTF-8" ?>

<!-- Created with iReport - A designer for JasperReports -->

<!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd">

<jasperReport

name="connect_hits_top10"

columnCount="1"

printOrder="Vertical"

orientation="Portrait"

pageWidth="595"

pageHeight="842"

columnWidth="535"

columnSpacing="0"

leftMargin="30"

rightMargin="30"

topMargin="20"

bottomMargin="20"

whenNoDataType="NoPages"

isTitleNewPage="false"

isSummaryNewPage="false">

<property name="ireport.scriptlethandling" value="0" />

<property name="ireport.encoding" value="UTF-8" />

<import value="java.util.*" />

<import value="net.sf.jasperreports.engine.*" />

<import value="net.sf.jasperreports.engine.data.*" />

 

<parameter name="HITSChart" isForPrompting="false" class="java.awt.Image"/>

 

<field name="HITSRankingValue" class="java.lang.String"/>

<field name="ReportTitle" class="java.lang.String"/>

<field name="HITSEntityNameValue" class="java.lang.String"/>

 

<background>

<band height="0" isSplitAllowed="true" >

</band>

</background>

<title>

<band height="50" isSplitAllowed="true" >

<textField isStretchWithOverflow="false" pattern="" isBlankWhenNull="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >

<reportElement

mode="Transparent"

x="5"

y="6"

width="404"

height="38"

forecolor="#000000"

backcolor="#FFFFFF"

key="textField-2"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<textElement textAlignment="Left" verticalAlignment="Top" rotation="None" lineSpacing="Single">

<font fontName="Arial" pdfFontName="Helvetica" size="18" isBold="false" isItalic="false" isUnderline="false" isPdfEmbedded ="false" pdfEncoding ="Cp1252" isStrikeThrough="false" />

</textElement>

<textFieldExpression class="java.lang.String"><![CDATA[$F{ReportTitle}]]></textFieldExpression>

</textField>

<image scaleImage="RetainShape" vAlign="Top" hAlign="Left" isUsingCache="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >

<reportElement

mode="Opaque"

x="426"

y="6"

width="106"

height="33"

forecolor="#000000"

backcolor="#FFFFFF"

key="logo"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<graphicElement stretchType="NoStretch" pen="None" fill="Solid"

/>

<imageExpression class="java.lang.String"><![CDATA["sample_reports\logo.jpg"]]></imageExpression>

</image>

</band>

</title>

<pageHeader>

<band height="400" isSplitAllowed="true" >

<image scaleImage="RetainShape" vAlign="Middle" hAlign="Center" isLazy="true" isUsingCache="false" evaluationTime="Report" hyperlinkType="None" hyperlinkTarget="Self" >

<reportElement

mode="Opaque"

x="9"

y="9"

width="520"

height="380"

forecolor="#000000"

backcolor="#FFFFFF"

key="HITSChart"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<graphicElement stretchType="NoStretch" pen="None" fill="Solid"

/>

<imageExpression class="java.awt.Image"><![CDATA[$P{HITSChart}]]></imageExpression>

</image>

</band>

</pageHeader>

<columnHeader>

<band height="30" isSplitAllowed="true" >

<staticText>

<reportElement

mode="Transparent"

x="11"

y="7"

width="74"

height="14"

forecolor="#000000"

backcolor="#FFFFFF"

key="staticText-1"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<textElement textAlignment="Left" verticalAlignment="Top" rotation="None" lineSpacing="Single">

<font fontName="Arial" pdfFontName="Helvetica" size="10" isBold="false" isItalic="false" isUnderline="false" isPdfEmbedded ="false" pdfEncoding ="Cp1252" isStrikeThrough="false" />

</textElement>

<text><![CDATA[HITS Ranking]]></text>

</staticText>

<staticText>

<reportElement

mode="Transparent"

x="103"

y="8"

width="80"

height="13"

forecolor="#000000"

backcolor="#FFFFFF"

key="staticText-2"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<textElement textAlignment="Left" verticalAlignment="Top" rotation="None" lineSpacing="Single">

<font fontName="Arial" pdfFontName="Helvetica" size="10" isBold="false" isItalic="false" isUnderline="false" isPdfEmbedded ="false" pdfEncoding ="Cp1252" isStrikeThrough="false" />

</textElement>

<text><![CDATA[Entity Name]]></text>

</staticText>

</band>

</columnHeader>

<detail>

<band height="17" isSplitAllowed="true" >

<textField isStretchWithOverflow="false" pattern="" isBlankWhenNull="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >

<reportElement

mode="Transparent"

x="11"

y="2"

width="74"

height="15"

forecolor="#000000"

backcolor="#FFFFFF"

key="textField-1"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<textElement textAlignment="Left" verticalAlignment="Top" rotation="None" lineSpacing="Single">

<font fontName="Arial" pdfFontName="Helvetica" size="10" isBold="false" isItalic="false" isUnderline="false" isPdfEmbedded ="false" pdfEncoding ="Cp1252" isStrikeThrough="false" />

</textElement>

<textFieldExpression class="java.lang.String"><![CDATA[$F{HITSRankingValue}]]></textFieldExpression>

</textField>

<textField isStretchWithOverflow="false" pattern="" isBlankWhenNull="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >

<reportElement

mode="Transparent"

x="103"

y="3"

width="80"

height="12"

forecolor="#000000"

backcolor="#FFFFFF"

key="textField-3"

stretchType="NoStretch"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<box topBorder="None" topBorderColor="#000000" leftBorder="None" leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000" bottomBorder="None" bottomBorderColor="#000000"/>

<textElement textAlignment="Left" verticalAlignment="Top" rotation="None" lineSpacing="Single">

<font fontName="Arial" pdfFontName="Helvetica" size="10" isBold="false" isItalic="false" isUnderline="false" isPdfEmbedded ="false" pdfEncoding ="Cp1252" isStrikeThrough="false" />

</textElement>

<textFieldExpression class="java.lang.String"><![CDATA[$F{HITSEntityNameValue}]]></textFieldExpression>

</textField>

</band>

</detail>

<columnFooter>

<band height="30" isSplitAllowed="true" >

</band>

</columnFooter>

<pageFooter>

<band height="50" isSplitAllowed="true" >

</band>

</pageFooter>

<lastPageFooter>

<band height="50" isSplitAllowed="true" >

</band>

</lastPageFooter>

<summary>

<band height="50" isSplitAllowed="true" >

</band>

</summary>

</jasperReport>

 

---><---

 

I am using Jastperreports 1.2.

 

Help is greatly appreciated. The Demos / samples / forum searches did not really help...

 

Thanks,

Michael