FileSystemReportExporter

FileSystemReportExporter.java

package br.com.prixma.models;

import java.io.File;
import java.io.IOException;

import javax.enterprise.context.RequestScoped;
import javax.inject.Inject;

import org.slf4j.Logger;

import br.com.caelum.vraptor.jasperreports.Report;
import br.com.caelum.vraptor.jasperreports.ReportPathResolver;
import br.com.caelum.vraptor.jasperreports.download.BatchReportsDownload;
import br.com.caelum.vraptor.jasperreports.download.ReportDownload;
import br.com.caelum.vraptor.jasperreports.download.ReportsDownload;
import br.com.caelum.vraptor.jasperreports.exporter.ReportExporter;
import br.com.caelum.vraptor.jasperreports.formats.ExportFormat;

import com.google.common.io.Files;

@RequestScoped
public class FileSystemReportExporter {
	
	@Inject private ReportExporter exporter;
	@Inject private ReportPathResolver resolver;
	@Inject private Logger log;

	public File export(Report report, ExportFormat format) {
		return export(new ReportDownload(report, format));
	}
	
	public File export(ReportDownload download) {
		return write(download.getContent(exporter), download.getFileName());
	}
	
	public File export(ReportsDownload download) {
		return write(download.getContent(exporter), download.getFileName());
	}
	
	public File export(BatchReportsDownload download) {
		return write(download.getContent(exporter), download.getFileName());
	}
	
	public String getReportGenerationDirectory() {
		return resolver.getReportsPath() + File.separator + "tmp" + File.separator;
	}
	
	private File write(byte[] content, String fileName) {
		File file = new File(getReportGenerationDirectory() + fileName);
		try {
			Files.write(content, file);
			log.debug("File {} created", file.getAbsolutePath());
		} catch (IOException e) {
			log.error("Error creating report file", e);
		}
		return file;
	}

}

ReportController.java

package br.com.prixma.controllers;

import static br.com.caelum.vraptor.jasperreports.formats.ExportFormats.pdf;

import java.io.File;

import javax.inject.Inject;

import br.com.caelum.vraptor.Controller;
import br.com.caelum.vraptor.Get;
import br.com.prixma.models.FileSystemReportExporter;

@Controller
public class ReportController {
	
	@Inject FileSystemReportExporter exporter;
	
	@Get("/report/file")
	public File exportToFile() {
		File file = exporter.export(new SalesReport(), pdf());
		return file;
	}
	
}