How to pass parameters from PHP to JasperReports? - php

Question

Background
Using Centos 5.5 final, Apache Tomcat 6, Java 1.6.0_24, PHP/Java Bridge 6.2.1, and JasperReports 4.0.1.
Problem
PHP fails to add a text value to a java.util.HashMap.
Question
Does any one have any suggestions on how to accomplish this task?
Source
If I comment out the line $map->put("text", "This is a test string");, the report compiles and runs.
<?php
/**
* see if the java extension was loaded.
*/
function checkJavaExtension()
{
if(!extension_loaded('java'))
{
$sapi_type = php_sapi_name();
$port = (isset($_SERVER['SERVER_PORT']) && (($_SERVER['SERVER_PORT'])>1024)) ? $_SERVER['SERVER_PORT'] : '8080';
if ($sapi_type == "cgi" || $sapi_type == "cgi-fcgi" || $sapi_type == "cli")
{
if(!(PHP_SHLIB_SUFFIX=="so" && #dl('java.so'))&&!(PHP_SHLIB_SUFFIX=="dll" && #dl('php_java.dll'))&&!(#include_once("java/Java.inc"))&&!(require_once("http://127.0.0.1:$port/java/Java.inc")))
{
return "java extension not installed.";
}
}
else
{
if(!(#include_once("java/Java.inc")))
{
require_once("http://www.webserver.net:$port/JavaBridge/java/Java.inc");
}
}
}
if(!function_exists("java_get_server_name"))
{
return "The loaded java extension is not the PHP/Java Bridge";
}
return true;
}
/**
* convert a php value to a java one...
* #param string $value
* #param string $className
* #returns boolean success
*/
function convertValue($value, $className)
{
// if we are a string, just use the normal conversion
// methods from the java extension...
try
{
if ($className == 'java.lang.String')
{
$temp = new Java('java.lang.String', $value);
return $temp;
}
else if ($className == 'java.lang.Boolean' ||
$className == 'java.lang.Integer' ||
$className == 'java.lang.Long' ||
$className == 'java.lang.Short' ||
$className == 'java.lang.Double' ||
$className == 'java.math.BigDecimal')
{
$temp = new Java($className, $value);
return $temp;
}
else if ($className == 'java.sql.Timestamp' ||
$className == 'java.sql.Time')
{
$temp = new Java($className);
$javaObject = $temp->valueOf($value);
return $javaObject;
}
}
catch (Exception $err)
{
echo ( 'unable to convert value, ' . $value .
' could not be converted to ' . $className);
return false;
}
echo ( 'unable to convert value, class name '.$className.
' not recognised');
return false;
}
checkJavaExtension();
$map = new Java("java.util.HashMap");
$map->put("text", "This is a test string");
$compileManager = new JavaClass("net.sf.jasperreports.engine.JasperCompileManager");
$report = $compileManager->compileReport(realpath("test.jrxml"));
$fillManager = new JavaClass("net.sf.jasperreports.engine.JasperFillManager");
$emptyDataSource = new Java("net.sf.jasperreports.engine.JREmptyDataSource");
$jasperPrint = $fillManager->fillReport($report, $map, $emptyDataSource);
$outputPath = realpath(".")."/"."output.pdf";
$exportManager = new JavaClass("net.sf.jasperreports.engine.JasperExportManager");
$exportManager->exportReportToPdfFile($jasperPrint, $outputPath);
header("Content-type: application/pdf");
readfile($outputPath);
unlink($outputPath);
?>

Answer 1

Source
Here is some code to pass parameters from PHP to JasperReports automatically, based on a naming convention for user input fields.
<?php
include_once( 'db-account.php' );
checkjavaExtension();
function report_parse_post_parameters() {
# Automatically extract report parameters (data types converted in report).
$params = new java('java.util.HashMap');
# Pass the remaining POST "report_TYP" variables as report parameters.
foreach( $_POST as $name => $value ) {
if( strpos( $name, 'report_' ) === 0 ) {
$length = strlen( 'report_' );
if( strpos( $name, 'report_int_' ) === 0 ) {
$value = intval( $value );
$length = strlen( 'report_int_' );
$value = convertValue( $value, 'java.lang.Integer' );
$params->put( substr( $name, $length ), $value );
}
else if( strpos( $name, 'report_arr_' ) === 0 ) {
$length = strlen( 'report_arr_' );
$arrays = array_filter( explode( ',', $_POST[ $name ] ) );
# Map the values of the array form parameter to a java.util.ArrayList.
$arrayList = new java( 'java.util.ArrayList' );
foreach( $arrays as $value ) {
$arrayList->add( $value );
}
# Pass values into the report (without the "report_arr_" prefix).
$params->put( substr( $name, $length ), $arrayList );
}
else {
$params->put( substr( $name, $length ), $value );
}
}
}
return $params;
}
function report_execute( $filename = 'FILENAME' ) {
global $dbhost;
global $dbname;
global $dbuser;
global $dbpass;
$conn = null;
$report = realpath( '/PATH/TO/REPORT.jasper' );
try {
$params = report_parse_post_parameters();
# Load the PostgreSQL database driver.
java( 'java.lang.Class' )->forName( 'org.postgresql.Driver' );
# Attempt a database connection.
$conn = java( 'java.sql.DriverManager' )->getConnection(
"jdbc:postgresql://$dbhost/$dbname?user=$dbuser&password=$dbpass" );
# Use the fill manager to produce the report.
$fm = java('net.sf.jasperreports.engine.JasperFillManager');
$pm = $fm->fillReport($report, $params, $conn);
header('Cache-Control: private');
header('Content-Description: File Transfer');
header("Content-Disposition: attachment, filename=$filename.pdf");
header('Content-Type: application/pdf');
header('Content-Transfer-Encoding: binary');
java_set_file_encoding('ISO-8859-1');
$em = java('net.sf.jasperreports.engine.JasperExportManager');
$result = $em->exportReportToPdf($pm);
$conn->close();
header('Content-Length: ' . strlen( $result ) );
echo $result;
}
catch( Exception $ex ) {
if( $conn != null ) {
$conn->close();
}
throw $ex;
}
}
?>
Usage
Change this line:
function report_execute( $filename = 'FILENAME' ) {
Change this line:
$report = realpath( '/PATH/TO/REPORT.jasper' );
Change these lines to match your database software:
java( 'java.lang.Class' )->forName( 'org.postgresql.Driver' );
$conn = java( 'java.sql.DriverManager' )->getConnection(
"jdbc:postgresql://$dbhost/$dbname?user=$dbuser&password=$dbpass" );
Edit db-account.php:
<?php
$dbhost = 'HOSTNAME';
$dbname = 'DATABASE';
$dbuser = 'USERNAME';
$dbpass = 'PASSWORD';
?>
Example Form Input
Use a report_ prefix for user inputs, such as:
<form method="post" action='report.dhtml' class="climate" id="report-form">
<input type="hidden" name="report_int_ReportId" value="1" />
<input type="hidden" name="report_int_Radius" value="35" />
<input type="hidden" name="report_int_Trend" value="0" />
<input type="hidden" name="report_int_Relevance" value="1" />
<select id="category" name="report_int_CategoryId" value="2"></select>
<input type="text" id="city" name="report_int_CityId" />
<input class="submit-button" id="submit" type="submit" name="submit" value="Report" />
</form>
These values are then passed automatically into the report.
Note
You should not have to change the code for checkjavaExtension().