java - Grails XML marshalling: change default "<list>" root element name -

-

by default grails renders list in xml <list> element tag @ root. likewise renders map <map>. control name of root element.

if i'm returning arraylist of user, i'd see:

<users>     <user>...</user>     <user>...</user> </users>

how can achieve above? here requirements:

  • easy apply serialization 50+ domain classes
  • abstracted developers no explicit coding required during rendering domain objects (i.e., when render() or respond() invoked, arraylist still passed in, no explicit casting/converting as mynewtype)
  • able handle edge case of empty list (should return <users/>)

nice-to-haves:

  • if formula can applied map well, great :)

i have been semi-successful in achieving goals above, except don't know how account empty list case. implemented own objectmarshaller renders objects of type list. long list contains 1 element, can check element's type , determine plural tag name should (user => users). if list empty, , since java generics erasure (unless that's different in groovy?) have no way name empty list other defaulting <list/>, not acceptable.

some resources i've been through:

a way achieve write subclass collectionmarshaller class , register in our grails application. can example register custom implementation in bootstrap.groovy following code:

import org.codehaus.groovy.grails.web.converters.marshaller.xml.collectionmarshaller import grails.converters.xml  class bootstrap {    def init = { servletcontext ->     // register custom collection marshaller list user instances.     // root element name set users.     xml.registerobjectmarshaller(new collectionmarshaller() {         @override         public boolean supports(object object) {             object instanceof list<user>         }          @override         string getelementname(final object o) {             'users'         }     })   } }

to make work more domain classes might reference domain classes in bootstrap.groovy , loop through them configure custom collectionmarshaller instances.

for maps can extend mapmarshaller

also described in http://mrhaki.blogspot.com/2014/02/grails-goodness-customize-root-element.html


Comments

Post a Comment

Popular posts from this blog

python - Subclassed QStyledItemDelegate ignores Stylesheet -

-
i'm trying subclass qstyleditemdelegate remove focus rectangle in qcombobox . even though i'm calling base implementation of paint function , nothing else, result different. looks if parts of style-sheet influence bounding box of item taken consideration. class pstyleditemdelegate(qstyleditemdelegate): def __init__(self, *args, **kwds): super(pstyleditemdelegate, self).__init__(*args, **kwds) def paint(self, *args, **kwargs): qstyleditemdelegate.paint(*args, **kwargs) what have paint unmodified qstyleditemdelegate ? as suggested tried replacing pyside pyqt4 , works, appears bug. update pyside 1.1.2 1.2.1 result same. unfortunately switch breaks other parts of code, if there no other suggestions i'm going accept answer. edit bug tracked here
Read more

java - HttpClient 3.1 Connection pooling vs HttpClient 4.3.2 -

-
i have used httpclient3.1(java) connection pooling below : import org.apache.commons.httpclient.httpclient; import org.apache.commons.httpclient.multithreadedhttpconnectionmanager; import org.apache.commons.httpclient.params.httpclientparams; import org.apache.commons.httpclient.params.httpmethodparams; import org.apache.log4j.logger; public class httpclientmanager { private static logger logger = logger.getlogger(httpclientmanager.class); private static multithreadedhttpconnectionmanager connectionmanager = new multithreadedhttpconnectionmanager(); private static httpclientparams clientparams = new httpclientparams(); static { try { clientparams.makelenient(); clientparams.setauthenticationpreemptive(false); clientparams.setparameter(httpmethodparams.so_timeout, new integer(30000)); // set so_timeout clientparams.setparameter(httpmethodparams.head_body_check_timeout, new integer(3000)); // head responses ...
Read more

node.js - StackOverflow API not returning JSON -

-
i using node.js script gather data stackoverflow. know responses gzipped, put code in should take care of that. script follows: var request = require('request'); var zlib = require('zlib'); function getstackoverflowresponse(url, callback){ request(url, {encoding: null}, function(err, response, body){ if(response.headers['content-encoding'] == 'gzip'){ zlib.gunzip(body, function(err, dezipped) { callback(dezipped); }); } else { callback(body); } }); } var url = "https://api.stackexchange.com/docs/questions#pagesize=2&order=desc&min=2014-01-04&max=2014-02-02&sort=activity&tagged=apigee&filter=default&site=stackoverflow&run=true"; getstackoverflowresponse(url, function(questions) { console.log(questions); }); instead of getting json output, i'm getting following response: buffer 0d 0a 0d 0a 0d 0a 0d 0a 3c 21 44 4f 43 54 59 50 45 20 48...
Read more