net.sf.dynamicreports.jasper.transformation.expression.SubreportExpression Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of dynamicreports-core Show documentation

DynamicReports is an open source Java reporting library based on JasperReports. It allows to create dynamic report designs and it doesn't need a visual report designer. You can very quickly create reports and produce documents that can be displayed, printed or exported into many popular formats such as PDF, Excel, Word and others.

There is a newer version: 6.20.1

Show newest version

/*
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2018 Ricardo Mariaca and the Dynamic Reports Contributors
 * http://www.dynamicreports.org
 *
 * This file is part of DynamicReports.
 *
 * DynamicReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DynamicReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with DynamicReports. If not, see .
 */
package net.sf.dynamicreports.jasper.transformation.expression;

import net.sf.dynamicreports.design.base.DRDesignReport;
import net.sf.dynamicreports.design.base.expression.AbstractDesignComplexExpression;
import net.sf.dynamicreports.design.definition.DRIDesignReport;
import net.sf.dynamicreports.design.definition.expression.DRIDesignExpression;
import net.sf.dynamicreports.jasper.base.JasperReportDesign;
import net.sf.dynamicreports.jasper.transformation.JasperTransform;
import net.sf.dynamicreports.report.ReportUtils;
import net.sf.dynamicreports.report.builder.ReportBuilder;
import net.sf.dynamicreports.report.constant.Constants;
import net.sf.dynamicreports.report.definition.DRICustomValues;
import net.sf.dynamicreports.report.definition.ReportParameters;
import net.sf.dynamicreports.report.exception.DRException;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperReport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * SubreportExpression class.
 *
 * @author Ricardo Mariaca ([email protected])
 * @version $Id: $Id
 */
public class SubreportExpression extends AbstractDesignComplexExpression {
    private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;
    private static final Log log = LogFactory.getLog(SubreportExpression.class);

    private String name;
    private Integer pageWidth;
    private ReportBuilder reportBuilder;
    private Map, JasperReportDesign> reportDesigns;
    private Map, JasperReport> jasperReports;

    /**
     * Constructor for SubreportExpression.
     *
     * @param pageWidthExpression a {@link net.sf.dynamicreports.design.definition.expression.DRIDesignExpression} object.
     * @param reportExpression    a {@link net.sf.dynamicreports.design.definition.expression.DRIDesignExpression} object.
     * @param pageWidthExpression a {@link net.sf.dynamicreports.design.definition.expression.DRIDesignExpression} object.
     * @param pageWidth           a {@link java.lang.Integer} object.
     */
    public SubreportExpression(DRIDesignExpression pageWidthExpression, DRIDesignExpression reportExpression, Integer pageWidth) {
        addExpression(pageWidthExpression);
        addExpression(reportExpression);
        this.pageWidth = pageWidth;
        this.name = ReportUtils.generateUniqueName("subreportExpression");
        reportDesigns = new HashMap, JasperReportDesign>();
        jasperReports = new HashMap, JasperReport>();
    }

    /** {@inheritDoc} */
    @Override
    public Object evaluate(List values, ReportParameters reportParameters) {
        reportBuilder = (ReportBuilder) values.get(1);
        if (jasperReports.containsKey(reportBuilder)) {
            return jasperReports.get(reportBuilder);
        }
        try {
            DRICustomValues customValues = (DRICustomValues) reportParameters.getParameterValue(DRICustomValues.NAME);
            DRIDesignReport report = new DRDesignReport(reportBuilder.build(), pageWidth, customValues.getTocHeadings());
            JasperReportDesign reportDesign = new JasperReportDesign(report, reportParameters, null);
            JasperTransform jasperTransform = new JasperTransform(report, reportDesign);
            jasperTransform.transform();
            JasperReport jasperReport = JasperCompileManager.compileReport(reportDesign.getDesign());
            reportDesigns.put(reportBuilder, reportDesign);
            jasperReports.put(reportBuilder, jasperReport);
            return jasperReport;
        } catch (JRException e) {
            if (log.isErrorEnabled()) {
                log.error("Error encountered while creating subreport design", e);
            }
        } catch (DRException e) {
            if (log.isErrorEnabled()) {
                log.error("Error encountered while creating subreport design", e);
            }
        }
        return null;
    }

    /**
     * getReportDesign.
     *
     * @return a {@link net.sf.dynamicreports.jasper.base.JasperReportDesign} object.
     */
    public JasperReportDesign getReportDesign() {
        return reportDesigns.get(reportBuilder);
    }

    /**
     * Getter for the field reportBuilder.
     *
     * @return a {@link net.sf.dynamicreports.report.builder.ReportBuilder} object.
     */
    public ReportBuilder getReportBuilder() {
        return reportBuilder;
    }

    /** {@inheritDoc} */
    @Override
    public String getName() {
        return name;
    }

    /** {@inheritDoc} */
    @Override
    public Class getValueClass() {
        return JasperReport.class;
    }
}