org.apache.cocoon.selection
Class ResourceExistsSelector
java.lang.Object
org.apache.cocoon.util.AbstractLogEnabled
org.apache.cocoon.selection.ResourceExistsSelector
- All Implemented Interfaces:
- Disposable, org.apache.cocoon.selection.Selector, Serviceable, ThreadSafe
- public class ResourceExistsSelector
- extends org.apache.cocoon.util.AbstractLogEnabled
- implements ThreadSafe, Serviceable, Disposable, org.apache.cocoon.selection.Selector
Selects the first of a set of Resources (usually files) that exists.
A parameter 'prefix',
<map:parameter src="prefix" value="some/path
"/<
may be supplied to the selector instance. This prefix is prepended to all
test expressions before evaluation. The default prefix is '' (empty string),
meaning that all expressions are relative to the current sitemap, unless
explicitly overridden.
NOTE:
Provided resource URI is resolved as Source, relative to the current
sitemap, which differs from behavior of selector in previous versions.
To resolve resource paths relative to the context root, provide prefix
parameter:
<map:parameter name="prefix" value="context://"/<
For example, we could define a ResourceExistsSelector with:
<map:selector name="resource-exists"
logger="sitemap.selector.resource-exists"
src="org.apache.cocoon.selection.ResourceExistsSelector" /<
And use it to build a PDF from XSL:FO or a higher-level XML format with:
<map:match pattern="**.pdf"<
<map:select type="resource-exists"<
<map:when test="context/xdocs/{1}.fo"<
<map:generate src="content/xdocs/{1}.fo" /<
</map:when<
<map:otherwise<
<map:generate src="content/xdocs/{1}.xml" /<
<map:transform src="stylesheets/document2fo.xsl" /<
</map:otherwise<
</map:select<
<map:serialize type="fo2pdf" /<
- Version:
- $Id: ResourceExistsSelector.html 1304280 2012-03-23 11:18:01Z ilgrosso $
Fields inherited from interface org.apache.cocoon.selection.Selector |
ROLE |
Methods inherited from class org.apache.cocoon.util.AbstractLogEnabled |
getLogger, setLogger |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ResourceExistsSelector
public ResourceExistsSelector()
service
public void service(ServiceManager manager)
throws ServiceException
- Specified by:
service
in interface Serviceable
- Throws:
ServiceException
dispose
public void dispose()
- Specified by:
dispose
in interface Disposable
select
public boolean select(String expression,
Map objectModel,
Parameters parameters)
- Specified by:
select
in interface org.apache.cocoon.selection.Selector
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