DynamicReports:Conditional column styles

The ConditionalStyleBuilder can be used to set the style of a column conditionally. Following sample code shows how to set the background color to Orange and font to bold when the Price value is more than 1.


import java.awt.Color;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import net.sf.dynamicreports.jasper.builder.JasperReportBuilder;
import net.sf.dynamicreports.report.base.expression.AbstractSimpleExpression;
import net.sf.dynamicreports.report.builder.DynamicReports;
import net.sf.dynamicreports.report.builder.column.Columns;
import net.sf.dynamicreports.report.builder.column.TextColumnBuilder;
import net.sf.dynamicreports.report.builder.component.Components;
import net.sf.dynamicreports.report.builder.datatype.BigDecimalType;
import net.sf.dynamicreports.report.builder.datatype.DataTypes;
import net.sf.dynamicreports.report.builder.style.ConditionalStyleBuilder;
import net.sf.dynamicreports.report.builder.style.StyleBuilder;
import net.sf.dynamicreports.report.builder.style.Styles;
import net.sf.dynamicreports.report.constant.HorizontalAlignment;
import net.sf.dynamicreports.report.constant.PageType;
import net.sf.dynamicreports.report.datasource.DRDataSource;
import net.sf.dynamicreports.report.definition.ReportParameters;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.JRDataSource;

public class DynamicReportsTest {

    public DynamicReportsTest() {
        build();
    }

    public void build() {
        JasperReportBuilder report = DynamicReports.report();
        report.setPageFormat(PageType.LETTER);
//        report.setPageFormat(PageType.A4, PageOrientation.PORTRAIT);
        CurrencyType ct = new CurrencyType();
     
        TextColumnBuilder<BigDecimal> priceColumn = Columns.column("Price", "price", ct);
        TextColumnBuilder<Integer> quantityOrderedColumn = Columns.column("Quantity Ordered", "quantityOrdered", DataTypes.integerType());
        TextColumnBuilder<BigDecimal> totalPay = priceColumn.multiply(quantityOrderedColumn)
                .setTitle("Amount Paid")
                .setPattern(ct.getPattern());
        report.columns(Columns.columnRowNumberColumn("Item"),
                Columns.column("Name", "name", DataTypes.stringType()),
                priceColumn,
                quantityOrderedColumn,
                totalPay
        );

        StyleBuilder bold = Styles.style().bold();
        StyleBuilder centeredBold = Styles.style(bold)
                .setHorizontalAlignment(HorizontalAlignment.CENTER);
        StyleBuilder columnStyle = Styles.style(centeredBold);
     
        //Create the ConditionalStyleBuilder
        ConditionalStyleBuilder condColumnStyle = Styles.conditionalStyle(new CCExpression())
                .bold()
                .setHorizontalAlignment(HorizontalAlignment.CENTER)//.style(centeredBold)
                .setBackgroundColor(Color.ORANGE)
                .setBorder(Styles.pen1Point());

        //Create a StyleBuilder using the ConditionalStyleBuilder
        StyleBuilder priceStyle = Styles.style().conditionalStyles(condColumnStyle);

        report.setColumnTitleStyle(columnStyle);
        report.setColumnStyle(Styles.style().setHorizontalAlignment(HorizontalAlignment.CENTER));

        //Apply the StyleBuilder to a report column
        priceColumn.setStyle(priceStyle);
        report.highlightDetailEvenRows();
     
        report.title(Components.text("Test Report")
                .setStyle(centeredBold));
        report.title(Components.text("Detailed Report")
                .setStyle(centeredBold));
        SimpleDateFormat format = new SimpleDateFormat("MM/dd/YY");

       report.pageFooter(Components.horizontalFlowList().add(Components.text("Page "))
                .add(Components.pageNumber())
                .setStyle(bold));

       report.setDataSource(createDataSource());

       try {
            report.show();
       }catch(DRException e){
            e.printStackTrace();
       }
    }

     private class CCExpression extends AbstractSimpleExpression<Boolean> {
        public Boolean evaluate (ReportParameters param){
            BigDecimal price = param.getFieldValue("price");
            if (price.doubleValue() > 1){
                return true;
            } else {
                return false;
            }
        }
    }
 
    private class CurrencyType extends BigDecimalType {
        @Override
        public String getPattern() {
            return "$ #,###.##";
        }
    }
 
    private JRDataSource createDataSource() {
        DRDataSource dataSource = new DRDataSource("name", "price", "quantityOrdered");
        dataSource.add("Apple", new BigDecimal(1.29), 120);
        dataSource.add("Apple", new BigDecimal(1.69), 150);
        dataSource.add("Orange", new BigDecimal(0.99), 130);
        dataSource.add("Orange", new BigDecimal(0.96), 100);
        dataSource.add("Mange", new BigDecimal(0), 300);
        return dataSource;
    }
 
    public static void main(String[] args){
        new DynamicReportsTest();
    }
}
       
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