Hi Robby! The Stringtemplate generator is much more sophisticated (you have iterators, access to objects methods, ...) compared to this simple component, that simply provides variable expansion.
The other difference is: Stringtemplate is a generator, the VariableExpander is a component you can put in the middle of the pipeline whenever you need - in my case, I needed to plug it at the 3rd stage of the pipeline. For what it worths, Stringtemplate generator brings a 3rd party dependency, VariableExpander comes dependencies-free inside the cocoon-sax package. Hope this clarifies, don't hesitate to ask if you need to know more! All the best, -Simo http://people.apache.org/~simonetripodi/ http://simonetripodi.livejournal.com/ http://twitter.com/simonetripodi http://www.99soft.org/ On Thu, Dec 15, 2011 at 5:32 PM, Robby Pelssers <robby.pelss...@nxp.com> wrote: > Hi Simone, > > This sounds useful. But it's not really clear to me as to how this differs > from the Stringtemplate generator which is also part of C3. > > Robby > > -----Original Message----- > From: simone.trip...@gmail.com [mailto:simone.trip...@gmail.com] On Behalf Of > Simone Tripodi > Sent: Thursday, December 15, 2011 5:25 PM > To: dev@cocoon.apache.org > Subject: [C3] new pipeline component: variabelExpander > > Hi all guys, > I just committed r1214835 a new component I need for work, so I > thought it would have been a good idea contributing back to OSS since > C3 is the foundation of the XML processor I am writing. > > Basically, I needed to put variables inside our XML document that can > be replaced depending by the context the pipeline works, so the idea > came from Ant/Maven and some code I already did in Commons-Digester, > using the ${} marker for variables have to be expanded. > > Using that new component is very simple: given the XML > > <project> > <target> > <delete dir="${build.home}" /> > <delete dir="${dist.home}" /> > <echo>A property '${text.property}' inside the text</echo> > </target> > </project> > > users can define their variables (in form of Properties/Map<String,String>): > > Properties variables = new Properties(); > variables.setProperty( "build.base", "/Users/cocoon" ); > variables.setProperty( "build.home", "${build.base}/workspace" ); > variables.setProperty( "dist.home", "${build.base}/downloads" ); > variables.setProperty( "text.property", "Cocoon3 rocks!" ); > > then creating and run their pipeline adding the VariableExpander: > > newNonCachingPipeline().setURLGenerator( > getClass().getResource( "/variables-expander.xml" ) ) > .addVariableExpander( variables ) > .addSerializer() > .withEmptyConfiguration() > .setup( System.out ) > .execute(); > > the XML document will be processed by the next component in the > pipeline will look like: > > <project> > <target> > <delete dir="Users/cocoon/workspace" /> > <delete dir="Users/cocoon/download" /> > <echo>A property 'Cocoon3 rocks!' inside the text</echo> > </target> > </project> > > WDYT? I hope it will be useful for you as well it is for me :P > Have a nice day, all the best! > -Simo > > http://people.apache.org/~simonetripodi/ > http://simonetripodi.livejournal.com/ > http://twitter.com/simonetripodi > http://www.99soft.org/
