net.sf.dynamicreports.design.transformation.DatasetTransform Maven / Gradle / Ivy

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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.design.transformation;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import net.sf.dynamicreports.design.base.DRDesignDataset;
import net.sf.dynamicreports.design.definition.DRIDesignDataset;
import net.sf.dynamicreports.design.exception.DRDesignReportException;
import net.sf.dynamicreports.report.definition.DRIDataset;
import net.sf.dynamicreports.report.exception.DRException;

/**
 * @author Ricardo Mariaca ([email protected])
 */
public class DatasetTransform {
	private DesignTransformAccessor accessor;
	private Map datasets;
	private Map designDatasets;

	public DatasetTransform(DesignTransformAccessor accessor) {
		this.accessor = accessor;
		datasets = new HashMap();
		designDatasets = new HashMap();
	}

	public DRDesignDataset transform(DRIDataset dataset) throws DRException {
		if (dataset == null) {
			return null;
		}
		if (designDatasets.containsKey(dataset)) {
			return designDatasets.get(dataset);
		}

		DatasetExpressionTransform datasetExpressionTransform = new DatasetExpressionTransform(accessor, dataset);
		datasetExpressionTransform.transform();
		DRDesignDataset designDataset = new DRDesignDataset(datasetExpressionTransform);
		if (dataset.getQuery() != null) {
			designDataset.setQuery(accessor.getReportTransform().query(dataset.getQuery()));
		}
		designDataset.setConnectionExpression(accessor.getExpressionTransform().transformExpression(dataset.getConnectionExpression()));
		designDataset.setDataSourceExpression(accessor.getExpressionTransform().transformExpression(dataset.getDataSourceExpression()));
		designDataset.setFilterExpression(datasetExpressionTransform.transformExpression(dataset.getFilterExpression()));

		addDataset(dataset, designDataset);

		return designDataset;
	}

	public DatasetExpressionTransform getDatasetExpressionTransform(DRIDataset dataset) {
		return designDatasets.get(dataset).getDatasetExpressionTransform();
	}

	protected DRDesignDataset getDesignDataset(DRIDataset dataset) {
		return designDatasets.get(dataset);
	}

	private void addDataset(DRIDataset dataset, DRDesignDataset designDataset) {
		if (datasets.containsKey(designDataset.getName())) {
			throw new DRDesignReportException("Duplicate declaration of dataset \"" + designDataset.getName() + "\"");
		}
		datasets.put(designDataset.getName(), designDataset);
		designDatasets.put(dataset, designDataset);
	}

	public Collection getDatasets() {
		return datasets.values();
	}
}