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**jay.l.fisher** · 3 Aug 2012, 15:57

Also getting this error when trying to encode an ArrayList<HashMap<String,String> that looks like this in debug ...

[{u=1, s=1014, c=2}, {u=1, s=1012, c=2}]

The stack ...

Code:

Caused by: com.google.gwt.core.client.JavaScriptException: (null): null
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:248)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269)
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
    at com.smartgwt.client.util.JSONEncoder.encode(JSONEncoder.java)
    at com.islandpacific.gui.client.purchasing.productionorder.ProductionPackEditor.prepareFormForSave(ProductionPackEditor.java:672)
    at com.islandpacific.gui.client.purchasing.productionorder.ProductionPackEditor.access$17(ProductionPackEditor.java:644)
    at com.islandpacific.gui.client.purchasing.productionorder.ProductionPackEditor$15.onCloseClick(ProductionPackEditor.java:626)
    at com.smartgwt.client.widgets.events.CloseClickEvent.dispatch(CloseClickEvent.java:99)
    at com.smartgwt.client.widgets.events.CloseClickEvent.dispatch(CloseClickEvent.java:1)
    at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
    at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
    at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
    at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
    at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
    at com.smartgwt.client.widgets.BaseWidget.fireEvent(BaseWidget.java:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:337)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:218)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269)
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
    at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
    at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:213)
    at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:292)
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:546)
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
    at java.lang.Thread.run(Thread.java:680)

**jay.l.fisher** · 3 Aug 2012, 15:57

SmartClient Version: SNAPSHOT_v8.3d_2012-07-21/PowerEdition Deployment (built 2012-07-21)

**Isomorphic** · 3 Aug 2012, 20:14

We believe we have fixed this issue. Please try the next nightly build (Aug 4 or greater)

Thanks
Isomorphic Software.

**jay.l.fisher** · 4 Aug 2012, 07:13

Better, but now when I encode an ArrayList<HashMap<String,String> that looks like this in debug ...

[{u=1, s=1010, c=102}, {u=1, s=1012, c=102}]

I get this

"[{u=1, s=1010, c=102}, {u=1, s=1012, c=102}]"

The whole thing is surrounded by double-quotes.

**Isomorphic** · 4 Aug 2012, 15:06

Did This ArrayList / HashMap case ever work?

JSON.encode expects to be passed a JavaScript object. If passed a native Java object directly it will essentially 'toString()' the object. We have recently made a change to quote the toString()'d output - this ensures that if a developer calls "eval()" on the result of a JSON.encode() call that hit a native java object the eval will be working with valid JS code.

RecordList / Record objects are JS based, so you can use 'getJsObj()' to pass in the JS equivalents but for other native Java objects we would expect you to need to do a conversion, possibly using JSOHelper or similar.
We do handle this kind of conversion automatically when sending Request parameters to and from the SmartClient server but if you're just calling JSON.encode() and passing in Java Objects directly from application code this wouldn't be supported.
If this is something that was working for you before and is recently broken, we may need to see a test case so we're sure we understand your usage.

Thanks
Isomorphic Software

**jay.l.fisher** · 6 Aug 2012, 06:55

Actually I changed to ArrayList / HashMap to try to avoid the original problem of the inclusion of the "__ref" attribute. I've reverted back to the original code and it is working fine now.

Thanks!

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Recent changes to JSONEncoder?

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