Module: JasperRails::Jasper::Rails

Defined in:
lib/jasper-rails.rb

Class Method Summary collapse

Class Method Details

.parameter_value_of(param) ⇒ Object

Returns the value without conversion when it’s converted to Java Types. When isn’t a Rjb class, returns a Java String of it.



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# File 'lib/jasper-rails.rb', line 131

def self.parameter_value_of(param)
  # Using Rjb::import('java.util.HashMap').new, it returns an instance of
  # Rjb::Rjb_JavaProxy, so the Rjb_JavaProxy parent is the Rjb module itself.
  if param.class.parent == Rjb
    param
  else
    JavaString.new(param.to_s)
  end
end

.render_pdf(jasper_file, datasource, parameters, options) ⇒ Object 



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# File 'lib/jasper-rails.rb', line 77

def self.render_pdf(jasper_file, datasource, parameters, options)
  options ||= {}
  parameters ||= {}
  jrxml_file  = jasper_file.sub(/\.jasper$/, ".jrxml")

  begin
    # Converting default report params to java HashMap
    jasper_params = HashMap.new
    JasperRails.config[:report_params].each do |k,v|
      jasper_params.put(k, v)
    end

    # Convert the ruby parameters' hash to a java HashMap, but keeps it as
    # default when they already represent a JRB entity.
    # Pay attention that, for now, all other parameters are converted to string!
    parameters.each do |key, value|
      jasper_params.put(JavaString.new(key.to_s), parameter_value_of(value))
    end

    # Compile it, if needed
    if !File.exist?(jasper_file) || (File.exist?(jrxml_file) && File.mtime(jrxml_file) > File.mtime(jasper_file))
      JasperCompileManager.compileReportToFile(jrxml_file, jasper_file)
    end

    # Fill the report
    if datasource
      input_source = InputSource.new
      input_source.setCharacterStream(StringReader.new(datasource.to_xml(options).to_s))
      data_document = silence_warnings do
        # This is here to avoid the "already initialized constant DOCUMENT_POSITION_*" warnings.
        JRXmlUtils._invoke('parse', 'Lorg.xml.sax.InputSource;', input_source)
      end

      jasper_params.put(JRXPathQueryExecuterFactory.PARAMETER_XML_DATA_DOCUMENT, data_document)
      jasper_print = JasperFillManager.fillReport(jasper_file, jasper_params)
    else
      jasper_print = JasperFillManager.fillReport(jasper_file, jasper_params, JREmptyDataSource.new)
    end

    # Export it!
    JasperExportManager._invoke('exportReportToPdf', 'Lnet.sf.jasperreports.engine.JasperPrint;', jasper_print)
  rescue Exception=>e
    if e.respond_to? 'printStackTrace'
      ::Rails.logger.error e.message
      e.printStackTrace
    else
      ::Rails.logger.error e.message + "\n " + e.backtrace.join("\n ")
    end
    raise e
  end
end