CODEWITHSUNDEEP
javajasper-reports
Hilarious404
Hilarious404

Reputation: 434

How to check if the value of BigDecimal field is negative in JasperReports

I am getting some strange negative values in my report, which could be from the database. I want to format fields to display zero when the values are negative in the expression editor. How can this be done?

Upvotes: 0

Views: 7492

Answers (1)

Alex K
Alex K

Reputation: 22867

You should use the BigDecimal.signum() method for check the sign of BigDecimal.

The expression will be:

<textFieldExpression><![CDATA[$P{bigDecimalValue}.signum() == -1 ? "0" : "Not negative big decimal"]]></textFieldExpression>

The expression for Double is simpler:

<textFieldExpression><![CDATA[$P{doubleValue} < 0 ? "0" : "Non negative double"]]></textFieldExpression>

The sample:

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="BigDecimal check" pageWidth="595" pageHeight="842" whenNoDataType="AllSectionsNoDetail" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
    <parameter name="doubleValue" class="java.lang.Double" isForPrompting="false">
        <defaultValueExpression><![CDATA[1234.567]]></defaultValueExpression>
    </parameter>
    <parameter name="bigDecimalValue" class="java.math.BigDecimal" isForPrompting="false">
        <defaultValueExpression><![CDATA[new BigDecimal(-9.8)]]></defaultValueExpression>
    </parameter>
    <title>
        <band height="70">
            <textField>
                <reportElement x="10" y="10" width="300" height="15"/>
                    <textFieldExpression><![CDATA[$P{doubleValue} < 0.0 ? "0" : "Non negative double"]]></textFieldExpression>
            </textField>
            <textField>
                <reportElement x="10" y="25" width="300" height="15"/>
                <textFieldExpression><![CDATA[$P{bigDecimalValue}.signum() == -1 ? "0" : "Not negative big decimal"]]></textFieldExpression>
            </textField>
        </band>
    </title>
</jasperReport>

The output result generated in Jaspersoft Studio will be:

enter image description here

Upvotes: 3

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