I'm currently at a stage where I'm trying to figure out
how to create code blocks that I can call from different places.
There are a few ways to do this using the define tag.
If you just want to execute the same block accessing defined
variables you can use define:script:
<define:script var="scripNamet">
<!-- jelly script here -->
</define:script>
<!-- more jelly here -->
And you can call it with define:invoke:
<define:invoke script="${scriptName}"/>
NOTE: this script needs to be defined before any code that uses it as
Jelly uses a SAX parser.
If you need to parse parameters to the script it is probably better
to use define:tag and define:taglib. This is slitty more complicated:
<define:taglib uri="nameSpaceForTag">
<define:tag name="tagName">
<!-- jelly script here -->
</define:tag>
</define:taglib>
You will need to add the name space of this taglib to your j:jelly tag:
<j:jelly xmlns:j="jelly:core" xmlns:define="jelly:define"
xmlns:foo="nameSpaceForTag">
<!-- your script -->
</j:jelly>
Now when you want to use the this new tag:
<j:jelly xmlns:j="jelly:core" xmlns:define="jelly:define"
xmlns:foo="nameSpaceForTag">
<foo:tagName/>
</j:jelly>
This will then execute the newly defined nameTag. This at the moment
is the same as define:invoke, but if the foo:tagName tag has attributes:
<j:jelly xmlns:j="jelly:core" xmlns:define="jelly:define"
xmlns:foo="nameSpaceForTag">
<foo:tagName attrOne="someData" attrTwo="${someDynamicData}"/>
</j:jelly>
Then inside the definition for tagName (in the taglib) the variables
attrOne and attrTwo are avalible:
<define:taglib uri="nameSpaceForTag">
<define:tag name="tagName">
<j:out value="attrOne: ${attrOne} attrTwo: ${attrTwo}"/>
</define:tag>
</define:taglib>
If this code is to be used across multiple file it is probably best
that you place this lib in a separate file and use j:import in the
script that needs it.
Neal
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