I'm receiving a java.util.List<Object[]> via JSON-rpc as a JavaScript array as follows.
[
[1, 0.10, 1.00],
[2, 0.20, 2.00],
[3, 0.30, 3.00],
[4, 0.40, 4.00],
[5, 0.50, 5.00],
[6, 0.60, 6.00],
[7, 0.70, 7.00],
[8, 0.80, 8.00],
[9, 0.90, 9.00],
[10, 1.00, 10.00],
[11, 1.10, 11.00],
[12, 1.20, 12.00],
[13, 1.30, 13.00],
[14, 1.40, 14.00],
[15, 1.50, 15.00],
[16, 1.60, 16.00],
[17, 1.70, 17.00],
[18, 1.80, 18.00]
]
I need to pass this same array back to the server (with a little modification in the last dimension).
I use the following function to send back this array.
var request;
var timeout;
var itemsArray=[];
function insert()
{
if(!request)
{
var i=0;
$('input[name="txtCharge[]"]').each(function()
{
isNaN($(this).val())||$(this).val()===''?itemsArray[i][2]='':itemsArray[i][2]=eval(eval($(this).val()).toFixed(2));
i++;
});
request = $.ajax({
dataType:"json",
type: "POST",
data: JSON.stringify({jsonrpc:'2.0', method:'insertZoneCharges', id:'jsonrpc', params:[itemsArray]}),
contentType: "application/json-rpc; charset=utf-8",
url: "AddZoneChargeList",
success: function(response)
{
alert(response.result);
},
complete: function()
{
timeout = request = null;
},
error: function(request, status, error)
{
if(status!=="timeout"&&status!=="abort")
{
alert(status+" : "+error);
}
}
});
timeout2 = setTimeout(function() {
if(request)
{
request.abort();
alert("The request has been timed out.");
}
}, 300000);
}
}
The structure of the array itemsArray after the loop is exactly the same as mentioned in the first snippet.
The method to be invoked by this jQuery function is as follows.
@Namespace("/admin_side")
@ResultPath("/WEB-INF/content")
@ParentPackage(value="json-default")
public final class ZoneCharge extends ActionSupport implements Serializable
{
private static final long serialVersionUID = 1L;
public ZoneCharge() {}
//This method is invoked by the given jQuery function.
//It should accept the array as a parameter of type List<Object[]> but it doesn't.
@SMDMethod
public String insertZoneCharges(@SMDMethodParameter(name="list")List<Object[]> list)
{
for(Object[]o:list)
{
System.out.println(o[0]+" : "+o[1]+" : "+o[2]);
}
return "The action completed successfully.";
}
@Action(value = "AddZoneChargeList",
results = {
@Result(name = ActionSupport.SUCCESS, type = "json", params = {"enableSMD", "true"})},
interceptorRefs = {
@InterceptorRef(value = "json", params = {"enableSMD", "true"})})
public String insertAction() throws Exception {
return ActionSupport.SUCCESS;
}
}
When an attempt is made to make a request, it causes the following exception to be thrown.
Feb 19, 2014 6:14:00 AM org.apache.struts2.json.rpc.RPCError error
SEVERE: Incompatible types for property insertZoneCharges
org.apache.struts2.json.JSONException: Incompatible types for property insertZoneCharges
at org.apache.struts2.json.JSONPopulator.convertToCollection(JSONPopulator.java:254)
at org.apache.struts2.json.JSONPopulator.convert(JSONPopulator.java:131)
at org.apache.struts2.json.JSONInterceptor.invoke(JSONInterceptor.java:242)
at org.apache.struts2.json.JSONInterceptor.intercept(JSONInterceptor.java:133)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at filter.NoCacheFilter.doFilter(NoCacheFilter.java:25)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.channel.ChannelProcessingFilter.doFilter(ChannelProcessingFilter.java:144)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.multipart.support.MultipartFilter.doFilterInternal(MultipartFilter.java:119)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Why isn't that array is mapped to List<Object[]>, when the same List<Object[]> is correctly mapped to an array while receiving the response from the server (this is done by a separate jQuery function which is not covered in this question)?
EDIT 1:
The following line,
data: JSON.stringify({jsonrpc:'2.0', method:'insertZoneCharges', id:'jsonrpc', params:[itemsArray]})
in the given jQuery function corresponds to the following string.
{
"jsonrpc": "2.0",
"method": "insertZoneCharges",
"id": "jsonrpc",
"params": [
[
[1, 0.1, 1],
[2, 0.2, 2],
[3, 0.3, 3],
[4, 0.4, 4],
[5, 0.5, 5],
[6, 0.6, 6],
[7, 0.7, 7],
[8, 0.8, 8],
[9, 0.9, 9],
[10, 1, 10],
[11, 1.1, 11],
[12, 1.2, 12],
[13, 1.3, 13],
[14, 1.4, 14],
[15, 1.5, 15],
[16, 1.6, 16],
[17, 1.7, 17],
[18, 1.8, 18]
]
]
}
This appears valid and should correctly be mapped to java.util.List<Object[]> without causing the exception.
EDIT 2:
This works when the generic type parameter is removed so that the list is simply List (and not <List<Object[]>>) or the parameter is made to be of type of List<List<Object>>. Something like,
@SMDMethod
public String insertZoneCharges(@SMDMethodParameter(name="list")List<List<Object>> list)
{
for(List<Object> o:list)
{
System.out.println(o);
}
return "The action completed successfully.";
}
The loop displays the following output.
[1, 0.1, 1]
[2, 0.2, 2]
[3, 0.3, 3]
[4, 0.4, 4]
[5, 0.5, 5]
[6, 0.6, 6]
[7, 0.7, 7]
[8, 0.8, 8]
[9, 0.9, 9]
[10, 1, 10]
[11, 1.1, 11]
[12, 1.2, 12]
[13, 1.3, 13]
[14, 1.4, 14]
[15, 1.5, 15]
[16, 1.6, 16]
[17, 1.7, 17]
[18, 1.8, 18]
Looking at the output, the JSON array should correctly be mapped to List<Object[]> but it doesn't happen.
EDIT 3: (not a substantial edit).
Although the actual array is invisible in the jQuery function given, this can simply be reproduced by the following jQuery function.
function insert()
{
var a=[[1, 2], [3, 4]]; //Array.
$.ajax({
dataType:"json",
type: "POST",
data: JSON.stringify({jsonrpc:'2.0', method:'insertZoneCharges', id:'jsonrpc', params:[a]}),
contentType: "application/json-rpc; charset=utf-8",
url: "AddZoneChargeList",
success: function(response)
{
alert(response.result);
},
complete: function()
{
//Do something.
},
error: function(request, status, error)
{
//Do something.
}
});
}
}
And the expected method parameter of the SMD method may either be java.util.List<Object[]> or java.util.List<Long[]>. In either case, it fails with the exception given.
Remaining one last thing. If there is a single dimensional array like (in JavaScript),
var a=[1, 2];
then this is correctly mapped to Long[] (and so as to Object[]) as an SMD method parameter.
So, now I don't see anymore where to look.
You are mapping parameters incorrectly the correct mapping would be
@SMDMethod
public String insertZoneCharges(@SMDMethodParameter(name="list")Object[] list)