For those that are interested, here's a summary of JSR-223, straight
from the spec lead.
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Mark Roth, Java Software
JSP 2.0 Specification Lead
Sun Microsystems, Inc.
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Hi Mark
Here's a little essay on the relationship between the JSR and PHP. Feel free to
forward it.
JSR 223 defines an API used to embed scripting engines in Java applications. As a
special case, it defines a class of Servlets that host scripting engines. The engines
generate web content by executing scripts.
One of the implementations uses the native open source PHP code and the corresponding
Servlet executes that code. There is a PHP SAPI whose callback functions are
implemented using JNI calls into the Servlet and Servlet Container. The PHP scripts
can also instantiate Java Objects using the Web Application's ClassLoader and invoke
the public methods of the objects. In cases where it makes sense, native PHP syntax
can be used to do enumerations/iterations and access collections at indexes.
The spec can also be implemented (more easily, in fact) using any of the many
Java-based scripting engines.. Rhino, Jython, BeanShell, Groovy, etc.
The spec won't specify how particular scripting languages call Java. We assume that
all of them can do it in their own fashion. With all of the Java-based scripting
engines, this is a built-in feature. To do an implementation with PHP, we did it
ourselves.
The JSR also does not deal specifically with native applications. It just so happens
that one of the implementations uses the native PHP sources to implement the Java API
that the JSR does deal with.
The Java support in PHP4 is experimental and labeled as such. It contains a lot of
good ideas, some of which we used, but as it stands, it probably isn't usable.
//mike
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