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Message-ID: <2984ec0b05080515165c7450af@mail.gmail.com>
Date: Fri, 5 Aug 2005 18:16:03 -0400
From: yaron kanza <yaron.kanza@gmail.com>
Reply-To: yaron kanza <yaron.kanza@gmail.com>
To: Jakarta Commons Users List <commons-user@jakarta.apache.org>,
	dmitri@apache.org
Subject: Re: [JXPath] How to use JXPath for Parsing (not Evaluating) XPath?
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References: <2984ec0b05080509021a1c47e5@mail.gmail.com>
	 <20050805181613.82780.qmail@web30509.mail.mud.yahoo.com>

Hello Dmitri,

Thank you for the quick response.

I was looking at the API of JXPathContext and I found the method
static CompiledExpression compile(java.lang.String xpath).=20
However, I couldn't find methods to traverse the parsed tree in the
CompileExpression class. So, I don't see how the compile method helps
me.

For example, suppose that I compile an expression //a/b[c=3D2]/d. Then,
how do I get the tree that represents the expression---a tree whose
root represents a descendant-or-self axis, the child of the root
represents the node-name "a", etc?

It will help me a lot if you will explain to me how to get the tree
that represents the expression (or the root of it).

Thank you very much,

Yaron


On 8/5/05, Dmitri Plotnikov <dmitri@apache.org> wrote:
> Yaron,
>=20
> JXPath will do that for you.  It does compile expressions (use the
> static method on JXPathContext) and returns a tree.
> One nice feature of that three is that if you call toString() on any
> subtree, it returns the XPath it represents.
>=20
> - Dmitri
>=20
> --- yaron kanza <yaron.kanza@gmail.com> wrote:
>=20
> > Hello,
> >
> > I need an XPath parser. That is, a tool that receives an XPath
> > expression and returns either an object tree that represents the
> > expression (DOM style) or a series of events (SAX style).
> >
> > Is JXPath the right tool for parsing XPath expressions?
> > If not, what is the right tool for parsing XPath?
> >
> > In the user's guide I found only examples showing how to use JXPath
> > for evaluating XPath expressions. I didn't find example showing how
> > to
> > parse XPath.
> >
> > Can someone please provide me more information on how to use JXPath
> > for parsing expressions?
> >
> > Does someone have examples showing how to use JXPath as a parser?
> >
> > Thank you,
> >
> > Yaron Kanza
> > The University of Toronto, Canada
> >
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> >
> >
>=20
>=20
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>=20
>

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