Thread: [Php-java-bridge-users] Fwd: My first attempt at using PHP/Java Bridge

Hi,

I'm working on porting an application to PHP that relies on some Java
functionality.  I've decided to use the PHP/Java Bridge.

Here is what I've got in PHP.  Summary: it takes in two strings, xml
and xsl, and should return the result of applying the xsl transform on
the xml.

So far, so good!  I originally was having trouble getting the result
back out into a PHP string variable, but there was just a simple typo
in the code,  So my post is turning into a slightly different
question.

Could someone familiar with the PHP/Java bridge look over my code and
let me know if it looks like I've got the "right idea"  I'm concerned
about performance, and the fact that the variables $xml and $xsl could
potentially be very large (megabytes of text)

Thanks in advance for any insight you can give me.  This is new ground
for me, and I want to make sure I'm not making any major mistakes.

------

function saxon($xml,$xsl){

    require_once("http://localhost:8080/JavaBridgeTemplate5442/java/Java.inc");

        $System = java("java.lang.System");
    $System->setProperty("javax.xml.transform.TransformerFactory",
"net.sf.saxon.TransformerFactoryImpl");

    $TransformerFactory = java("javax.xml.transform.TransformerFactory");
    $tFactory           = $TransformerFactory->newInstance();

    $xmlString = new Java("java.lang.String", $xml);
    $xslString = new Java("java.lang.String", $xsl);
    $xmlStringReader = new Java("java.io.StringReader", $xmlString);
    $xslStringReader = new Java("java.io.StringReader", $xslString);

    $xmlStreamSource = new
Java("javax.xml.transform.stream.StreamSource", $xmlStringReader);
    $xslStreamSource = new
Java("javax.xml.transform.stream.StreamSource", $xslStringReader);

    $transformer     = $tFactory->newTransformer($xslStreamSource);

    $outputStringWriter = new Java("java.io.StringWriter");
    $outputStreamResult = new
Java("javax.xml.transform.stream.StreamResult",$outputStringWriter);

    $transformer->transform($xmlStreamSource,$outputStreamResult);


    $outputString = new Java("java.lang.String");
    $outputString = $outputStringWriter->toString();

    return (java_values($outputString));

}

--
John

Hi,

If I understand your code correctly, your function "saxon" is called with
two arguments, $xml and $xsl being proxies for two (potentially large)
Strings.

As long as you don't evaluate these proxies (explicitly using
java_values($xml) or implicitly using a cast to ((string)$xml)), there
shouldn't be any performance problems.

The java_values() call forces the bridge to evaluate a proxy and to return
the result as a potentially large PHP value (string or array or ....). I
would call java_values() only if necessary. E.g. at the end of the script,
or right before manipulating it with native e.g. php str_* functions.

The $system->setProperty() assumes ownership of the back end. Instead of
setting the property over and over again I would set it once with a java
-D... parameter. Or rely on the JEE environment to do the correct
initialisation of your library.

Regards,
Jost Boekemeier

31. Mai 2009 4:55 nachm. schrieb am <
php...@li...>:

Hi,

I'm working on porting an application to PHP that relies on some Java
functionality.  I've decided to use the PHP/Java Bridge.

Here is what I've got in PHP.  Summary: it takes in two strings, xml
and xsl, and should return the result of applying the xsl transform on
the xml.

So far, so good!  I originally was having trouble getting the result
back out into a PHP string variable, but there was just a simple typo
in the code,  So my post is turning into a slightly different
question.

Could someone familiar with the PHP/Java bridge look over my code and
let me know if it looks like I've got the "right idea"  I'm concerned
about performance, and the fact that the variables $xml and $xsl could
potentially be very large (megabytes of text)

Thanks in advance for any insight you can give me.  This is new ground
for me, and I want to make sure I'm not making any major mistakes.

------

function saxon($xml,$xsl){

    require_once("http://localhost:8080/JavaBridgeTemplate5442/java/Java.inc
");

        $System = java("java.lang.System");
    $System->setProperty("javax.xml.transform.TransformerFactory",
"net.sf.saxon.TransformerFactoryImpl");

    $TransformerFactory = java("javax.xml.transform.TransformerFactory");
    $tFactory           = $TransformerFactory->newInstance();

    $xmlString = new Java("java.lang.String", $xml);
    $xslString = new Java("java.lang.String", $xsl);
    $xmlStringReader = new Java("java.io.StringReader", $xmlString);
    $xslStringReader = new Java("java.io.StringReader", $xslString);

    $xmlStreamSource = new
Java("javax.xml.transform.stream.StreamSource", $xmlStringReader);
    $xslStreamSource = new
Java("javax.xml.transform.stream.StreamSource", $xslStringReader);

    $transformer     = $tFactory->newTransformer($xslStreamSource);

    $outputStringWriter = new Java("java.io.StringWriter");
    $outputStreamResult = new
Java("javax.xml.transform.stream.StreamResult",$outputStringWriter);

    $transformer->transform($xmlStreamSource,$outputStreamResult);


    $outputString = new Java("java.lang.String");
    $outputString = $outputStringWriter->toString();

    return (java_values($outputString));

}

--
John

------------------------------------------------------------------------------
Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
is a gathering of tech-side developers & brand creativity professionals.
Meet
the minds behind Google Creative Lab, Visual Complexity, Processing, &
iPhoneDevCamp as they present alongside digital heavyweights like Barbarian
Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com
_______________________________________________
php-java-bridge-users mailing list
php...@li...
https://lists.sourceforge.net/lists/listinfo/php-java-bridge-users

Thank you Jost.

I believe the only java_values call that I have is necessary then.  I need
to get the result of the transformation back as a string so I can output it
(and possibly evaluate it for php code)  Unless there's some better way to
get a potentially large chunk of text back from java.

/John

On Mon, Jun 1, 2009 at 2:12 AM, <php...@li...
> wrote:

> Hi,
>
> If I understand your code correctly, your function "saxon" is called with
> two arguments, $xml and $xsl being proxies for two (potentially large)
> Strings.
>
> As long as you don't evaluate these proxies (explicitly using
> java_values($xml) or implicitly using a cast to ((string)$xml)), there
> shouldn't be any performance problems.
>
> The java_values() call forces the bridge to evaluate a proxy and to return
> the result as a potentially large PHP value (string or array or ....). I
> would call java_values() only if necessary. E.g. at the end of the script,
> or right before manipulating it with native e.g. php str_* functions.
>
> The $system->setProperty() assumes ownership of the back end. Instead of
> setting the property over and over again I would set it once with a java
> -D... parameter. Or rely on the JEE environment to do the correct
> initialisation of your library.
>
> Regards,
> Jost Boekemeier
>
> 31. Mai 2009 4:55 nachm. schrieb am <
> php...@li...>:
>
> Hi,
>
> I'm working on porting an application to PHP that relies on some Java
> functionality.  I've decided to use the PHP/Java Bridge.
>
> Here is what I've got in PHP.  Summary: it takes in two strings, xml
> and xsl, and should return the result of applying the xsl transform on
> the xml.
>
> So far, so good!  I originally was having trouble getting the result
> back out into a PHP string variable, but there was just a simple typo
> in the code,  So my post is turning into a slightly different
> question.
>
> Could someone familiar with the PHP/Java bridge look over my code and
> let me know if it looks like I've got the "right idea"  I'm concerned
> about performance, and the fact that the variables $xml and $xsl could
> potentially be very large (megabytes of text)
>
> Thanks in advance for any insight you can give me.  This is new ground
> for me, and I want to make sure I'm not making any major mistakes.
>
> ------
>
> function saxon($xml,$xsl){
>
>    require_once("
> http://localhost:8080/JavaBridgeTemplate5442/java/Java.inc
> ");
>
>        $System = java("java.lang.System");
>    $System->setProperty("javax.xml.transform.TransformerFactory",
> "net.sf.saxon.TransformerFactoryImpl");
>
>    $TransformerFactory = java("javax.xml.transform.TransformerFactory");
>    $tFactory           = $TransformerFactory->newInstance();
>
>    $xmlString = new Java("java.lang.String", $xml);
>    $xslString = new Java("java.lang.String", $xsl);
>    $xmlStringReader = new Java("java.io.StringReader", $xmlString);
>    $xslStringReader = new Java("java.io.StringReader", $xslString);
>
>    $xmlStreamSource = new
> Java("javax.xml.transform.stream.StreamSource", $xmlStringReader);
>    $xslStreamSource = new
> Java("javax.xml.transform.stream.StreamSource", $xslStringReader);
>
>    $transformer     = $tFactory->newTransformer($xslStreamSource);
>
>    $outputStringWriter = new Java("java.io.StringWriter");
>    $outputStreamResult = new
> Java("javax.xml.transform.stream.StreamResult",$outputStringWriter);
>
>    $transformer->transform($xmlStreamSource,$outputStreamResult);
>
>
>    $outputString = new Java("java.lang.String");
>    $outputString = $outputStringWriter->toString();
>
>    return (java_values($outputString));
>
> }
>
> --
> John
>
>
> ------------------------------------------------------------------------------
> Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
> is a gathering of tech-side developers & brand creativity professionals.
> Meet
> the minds behind Google Creative Lab, Visual Complexity, Processing, &
> iPhoneDevCamp as they present alongside digital heavyweights like Barbarian
> Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com
> _______________________________________________
> php-java-bridge-users mailing list
> php...@li...
> https://lists.sourceforge.net/lists/listinfo/php-java-bridge-users
>
> ------------------------------------------------------------------------------
> Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT
> is a gathering of tech-side developers & brand creativity professionals.
> Meet
> the minds behind Google Creative Lab, Visual Complexity, Processing, &
> iPhoneDevCamp as they present alongside digital heavyweights like Barbarian
> Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com
> _______________________________________________
> php-java-bridge-users mailing list
> php...@li...
> https://lists.sourceforge.net/lists/listinfo/php-java-bridge-users
>



-- 
John McGowan

Lynch2
792 West Bartlett Road
Bartlett, Illinois 60103

www.lynch2.com
w:847-608-6900 Ext 4110