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From "Mark Proctor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CAMEL-2921) DataFormat's should allow url query like parameters
Date Fri, 09 Jul 2010 00:15:51 GMT

    [ https://issues.apache.org/activemq/browse/CAMEL-2921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=60525#action_60525
] 

Mark Proctor commented on CAMEL-2921:
-------------------------------------

I should add that doing this allows url like parameters to be easily supported. As those parameters
just map to fields in the DataFormatDefinition; but "xstream" needs to return DataFormatDefinition
for this to work, and not the xstream DataFormat.

> DataFormat's should allow url query like parameters
> ---------------------------------------------------
>
>                 Key: CAMEL-2921
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-2921
>             Project: Apache Camel
>          Issue Type: Improvement
>          Components: camel-core
>            Reporter: Mark Proctor
>
> It would be nice if we could customise DataFormatDefinitions inline:
> marshal( "jaxb?contextPath=org.domain.package" )
> Here is an outline of some code I think that would achieve this, however to be safe (imho)
the resolver should only ever returned "cloned" copies of any registered DataFormatDefinition;
to save the originally source from being altered.
> I found this library (BSD license) that provides for reflection based cloning:
> http://commonj.googlecode.com/svn/trunk/src/org/jcommon/clone/
> Based on a blog  I read here:
> http://www.matthicks.com/2008/05/fastest-deep-cloning.html
> DataFormatDefinition
> {code}
>     public static DataFormat getDataFormat(RouteContext routeContext, DataFormatDefinition
type, String ref) {
>         if (type == null) {
>             ObjectHelper.notNull(ref, "ref or type");
>             
>             // try to let resolver see if it can resolve it, its not always possible
>             int pos = ref.indexOf( '?' );
>             if ( pos < 0 ) {                                
>                 type = routeContext.getCamelContext().resolveDataFormatDefinition( ref
);
>             } else {
>                 type = routeContext.getCamelContext().resolveDataFormatDefinition( ref.substring(0,
pos -1 ) );
>             }        
>             if (type != null &&  pos >= 0 ) {
>                 try {
>                     Map<String, Object> parameters = URISupport.parseQuery( ref.substring(
pos ) ); 
>                     try {
>                         IntrospectionSupport.setProperties(routeContext.getCamelContext().getTypeConverter(),
type, parameters);
>                     } catch (Exception e) {
>                         throw new RuntimeException( "Unable to set DataFormatDefinition
properties '" + ref + "'", e);
>                     }
>                 } catch (URISyntaxException e) {
>                     throw new RuntimeException( "Unable to parse parameters " + ref,
e);
>                 }
>                 
>                 return type.getDataFormat(routeContext);
>             }
>             DataFormat dataFormat = routeContext.getCamelContext().resolveDataFormat(ref);
>             if (dataFormat == null) {
>                 throw new IllegalArgumentException("Cannot find data format in registry
with ref: " + ref);
>             }
>             return dataFormat;
>         } else {
>             return type.getDataFormat(routeContext);
>         }
>     }
> {code}

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