Thx for the thoughts Claus. I can hack at some embedded xpath expression in simple and see what it looks like
On Mon, Sep 23, 2013 at 8:24 AM, Claus Ibsen <claus.ib...@gmail.com> wrote: > Hi > > I do see value in having an xpath function in the simple language, as > people are still doing alot of messaging with xml payloads. > > We could try experiment with adding the xpath function that supports > > xpath(xpathExp) > > Its the result type that could be tricky as xpath returns a NodeSet by > default. > I guess usually you want to grab a single element and have its value > returned as a String, like grabbing an attribute or content of a node. > Or evaluate it as a boolean. > > So we may need a 2nd parameter to indicate the result type of a value of > - boolean > - String > > xpath(xpathExp, resultType) > > And then there is the namespace mapping. Maybe we can have 3 parameter > for optional namespace mappings, separated by comma > > xpath(xpathExp, resultType, "ns2= > http://com.foo/wine,ns3=http://com.foo/beer";) > > But as you can see this syntax is somewhat complicated and thus not so > easy to implement and for end users to understand. > > Though XML and XPath are still often used. So it could be nice with an > xpath function in the simple language. > > PS: For composite expression in Java you can use ExpressionBuilder and > PredicateBuilder to combine them. So you can do it there. > > > > On Sat, Sep 21, 2013 at 9:29 AM, Claus Ibsen <claus.ib...@gmail.com> > wrote: > > Hi > > > > Hold your horses ... Camels. > > > > It can get too confusing and complex syntax if you can inline any > > other kind of languages in the simple language. Syntax parsers and > > whatnot cannot validate and parse the other languages syntax etc. The > > name of the language is simple, so lets try to keep it that way. > > > > Also with xpath there is the namepsace problem, and as well to define > > a result type etc. > > > > > > > > > > > > > > On Fri, Sep 20, 2013 at 11:39 PM, Christian Posta > > <christian.po...@gmail.com> wrote: > >> yah i like that. can you open a jira? > >> > >> > >> On Fri, Sep 20, 2013 at 9:36 AM, Dale King <dalewk...@gmail.com> wrote: > >> > >>> Perhaps adding language prefixes so that things like ${xpath:...} or > >>> ${ognl:...} and similar would work. > >>> > >>> > >>> On Fri, Sep 20, 2013 at 11:17 AM, bonnahu <bonn...@gmail.com> wrote: > >>> > >>> > Hi Christian, > >>> > I think it would be useful if we have such "composite" expression. > What > >>> do > >>> > you think? > >>> > > >>> > > >>> > > >>> > -- > >>> > View this message in context: > >>> > > >>> > http://camel.465427.n5.nabble.com/Is-it-possible-to-include-XPath-expression-in-simple-expression-tp5739830p5739882.html > >>> > Sent from the Camel - Users mailing list archive at Nabble.com. > >>> > > >>> > >>> > >>> > >>> -- > >>> Dale King > >>> > >> > >> > >> > >> -- > >> *Christian Posta* > >> http://www.christianposta.com/blog > >> twitter: @christianposta > > > > > > > > -- > > Claus Ibsen > > ----------------- > > Red Hat, Inc. > > Email: cib...@redhat.com > > Twitter: davsclaus > > Blog: http://davsclaus.com > > Author of Camel in Action: http://www.manning.com/ibsen > > > > -- > Claus Ibsen > ----------------- > Red Hat, Inc. > Email: cib...@redhat.com > Twitter: davsclaus > Blog: http://davsclaus.com > Author of Camel in Action: http://www.manning.com/ibsen > -- *Christian Posta* http://www.christianposta.com/blog twitter: @christianposta
