php-java-bridge-users

RE: [Php-java-bridge-users] Bridge turns BigInteger into a double?

[Abbett, J. <Jon...@ch...>]

Your suggested solution worked after I put quotes around my numeric
parameter -- the BigInteger constructor doesn't take Longs, but it does
take Strings!

$docRef->setVersion(new java("java.lang.BigInteger","1"));

Thanks for your help,
--Jon


-----Original Message-----
From: Jost Boekemeier [mailto:jos...@ya...]=20
Sent: Thursday, November 10, 2005 2:25 PM
To: Abbett, Jonathan; php...@li...
Subject: Ant: [Php-java-bridge-users] Bridge turns BigInteger into a
double?

Hi Jonathan,

please always create a java value explicitly instead
of relying on auto-conversions for php values[1]:

Instead of

  $obj->method($phpVal);

use

  $obj->method(new java("<param-class>", $phpVal));


So your example would read:

  $docRef->setVersion(new java("java.lang.BigInteger",
1));


> It looks like the PHP-Java Bridge is transforming my
> BigInteger=20

When possible a java value is represented as a php
value. "Possible" means: All sub-types of
java.lang.Number are represented as a php exact or
inexact number and all java strings are represented as
a UTF-8 encoded[2] php string.  Everything else is
represented as a opaque object handle.

To create an object handle for such a php value one
has to invoke the constructor as shown above.


Regards,
Jost Boekemeier

[1] all instances of java.lang.Number and all
instances of java.lang.String

[2] encoding can be changed with e.g.: java_set_file_encoding("ASCII").


=09

=09
	=09
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Representation of java objects (Was: RE: [Php-java-bridge-users] Bridge turns BigInteger into a double?)

[Jost B. <jos...@ya...>]

Hi Jonathan,

I think this is a more general problem. My suggested
workaround doesn't even work for custom number types
which might not have an appropriate constructor. 
Representing a complex number as a php value isn't
possible anyway.

For version 3.0 we have the opportunity to change this
behaviour and remove auto-conversion of return values
completely. This would allow users to work with java
numbers or java strings in a natural way, for example:

$str = new java("java.lang.String", ${123}";
$str = $str->substring(2);
$str = $str->substring($str->length()-1);

If users want to convert a java object into a php
object they can always use the cast operator, for
example:

echo strchr((string)$str, "2");


Regards,
Jost Boekemeier



	

	
		
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