How to add image as parameter from projects classpath in jasper reports

I designed a jasper report using ireport designer in which I added logo image in the title of the report. This image is added from the hard coded path on the local machine. I need to add the logo image from my projects classpath. To do that I created a parameter for the image in the report which is supplied from the program.

InputStream imgInputStream = this.getClass().getResourceAsStream("header.png");

HashMap<String, Object> parameters = new HashMap<String, Object>();
parameters.put("dateFrom", datum1);
parameters.put("dateTo", datum2);
parameters.put("logo", imgInputStream);


strQuery = "Select calldate,src,dst,duration,disposition,cdrcost from cdrcost where date(calldate) between '" + datum1 + "' and '" + datum2 + "'";

rs = conexiondb.Consulta(strQuery);
JRResultSetDataSource resultSetDataSource = new JRResultSetDataSource(rs);
//JasperPrint jasperPrint = JasperFillManager.fillReport(reportStream, parameters);

JasperRunManager.runReportToPdfStream(reportStream, fos, parameters, resultSetDataSource);

And below is the image snippet from the report:

<image>
  <reportElement x="0" y="1" width="555" height="61"/>
  <imageExpression><![CDATA[$P{logo}]]>
  </imageExpression>
</image>

Solution

We always pass in the image instead of the InputStream. First load up the image and set it in the parameter map:

BufferedImage image = ImageIO.read(getClass().getResource("/images/IMAGE.png"));
parameters.put("logo", image );

Then the parameter is just defined like:

<parameter name="logo" class="Object" isForPrompting="false">
  <parameterDescription><![CDATA[The letterhead image]]></parameterDescription>
  <defaultValueExpression><![CDATA[]]></defaultValueExpression>
</parameter>

And when placed in the report it looks like:

<image>
  <reportElement x="324" y="16" width="154" height="38"/>
  <imageExpression><![CDATA[$P{logo}]]></imageExpression>
</image>