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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.

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/**
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2016 Ricardo Mariaca
 * 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.base;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import net.sf.dynamicreports.design.definition.expression.DRIDesignComplexExpression;
import net.sf.dynamicreports.design.definition.expression.DRIDesignSimpleExpression;
import net.sf.dynamicreports.jasper.constant.ValueType;
import net.sf.dynamicreports.jasper.exception.JasperDesignException;
import net.sf.dynamicreports.report.definition.chart.DRIChartCustomizer;
import net.sf.jasperreports.engine.JRDefaultScriptlet;
import net.sf.jasperreports.engine.JRScriptlet;
import net.sf.jasperreports.engine.JRScriptletException;
import net.sf.jasperreports.engine.fill.JRFillField;
import net.sf.jasperreports.engine.fill.JRFillGroup;
import net.sf.jasperreports.engine.fill.JRFillParameter;
import net.sf.jasperreports.engine.fill.JRFillVariable;

/**
 * @author Ricardo Mariaca ([email protected])
 */
public class JasperScriptlet extends JRDefaultScriptlet {
	public static final String NAME = "DYNAMICREPORTS";
	public static final String SCRIPTLET_NAME = NAME + JRScriptlet.SCRIPTLET_PARAMETER_NAME_SUFFIX;

	private JasperReportParameters reportParameters;

	public Object getValue(String valueName) {
		return reportParameters.getValue(valueName);
	}

	public Object getValue(String name, Object[] values) {
		return getComplexExpression(name).evaluate(Arrays.asList(values), reportParameters);
	}

	public JasperReportParameters getReportParameters() {
		return reportParameters;
	}

	private JasperCustomValues getCustomValues() {
		try {
			return (JasperCustomValues) getParameterValue(JasperCustomValues.NAME, false);
		} catch (JRScriptletException e) {
			throw new JasperDesignException("Custom values not found", e);
		}
	}

	protected ValueType getValueType(String name) {
		return getCustomValues().getValueType(name);
	}

	protected DRIDesignSimpleExpression getSimpleExpression(String name) {
		return getCustomValues().getSimpleExpression(name);
	}

	protected DRIDesignComplexExpression getComplexExpression(String name) {
		return getCustomValues().getComplexExpression(name);
	}

	protected List getChartCustomizers(String name) {
		return getCustomValues().getChartCustomizers(name);
	}

	protected Object getSystemValue(String name) {
		return getCustomValues().getSystemValue(name);
	}

	protected Collection getFields() {
		return fieldsMap.keySet();
	}

	protected Collection getVariables() {
		return variablesMap.keySet();
	}

	protected Collection getParameters() {
		return parametersMap.keySet();
	}

	protected Integer getSubreportWidth() {
		return getCustomValues().getSubreportWidth();
	}

	@Override
	public void setData(Map parsm, Map fldsm, Map varsm, JRFillGroup[] grps) {
		super.setData(parsm, fldsm, varsm, grps);
		reportParameters = new JasperReportParameters(this);
	}

	@Override
	public void afterReportInit() throws JRScriptletException {
		super.afterReportInit();
		JasperCustomValues customValues = getCustomValues();
		if (customValues != null) {
			customValues.setJasperScriptlet(this);
		}
	}
}