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  • Isomorphic
    replied
    Basically using the <DataSource> tag in this way is an unconditional load of the DataSource. So loading the same DataSource twice this way would result in clobbering the DataSource definition, with undefined behavior after that. So it's generally better to go through DataSource.load().

    Leave a comment:

  • bbruyn
    replied
    That's what it looked like. I have a case where this might be useful in my app - can you explain what you mean by, "shouldn't really be directly used in a normal app"?

    I gave it a whirl in a little test case and though things end up working in the end, I am greeted with the following along the way

    Code:
    java.lang.ClassCastException: com.smartgwt.client.data.DataSource cannot be cast to com.smartgwt.client.core.DataClass
    at com.smartgwt.client.util.ObjectFactory.createInstance(ObjectFactory.java)
    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:338)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
    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:242)
    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:338)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
    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:242)
    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:338)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
    at com.smartgwt.client.util.JSOHelper.convertToJava(JSOHelper.java)
    at com.smartgwt.client.util.JSOHelper.convertToMap(JSOHelper.java:647)
    at com.smartgwt.client.util.JSOHelper.convertToMap(JSOHelper.java:665)
    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:338)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
    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:242)
    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.reactToMessages(BrowserChannelServer.java:293)
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
    at java.lang.Thread.run(Thread.java:662)

    Leave a comment:

  • Isomorphic
    replied
    That will load the DataSource with the provided ID as part of loading the Component XML file. It's a facility used by Visual Builder to create a self-contained Component XML file for a page, and shouldn't really be directly used in a normal app.

    Leave a comment:

  • bbruyn
    replied
    Apologies if I'm hijacking the thread here, but I'm curious to know what that DataSource element in Screen.ui.xml is supposed to do - and specifically the loadID element. I don't find any reference to that anywhere...

    Thanks in advance.
    Last edited by bbruyn; 31 May 2013, 09:39. Reason: clarification on the element in question

    Leave a comment:

  • Isomorphic
    replied
    No, this reflection capability is a 4.0 feature.

    Leave a comment:

  • fatzopilot
    replied
    Hi,

    The API for 3.1 is considerably different at this point, i.e. com.smartgwt.client.bean.BeanFactory does not exist. Is there still a way to register specific classes for reflection to use them in a component schema?

    Thanks,
    fatzopilot

    Leave a comment:

  • Isomorphic
    replied
    You can do this, but your class needs to be set up for reflection.

    Note that autoDraw="false" doesn't make sense on a Component Schema (does nothing).

    Leave a comment:

  • fatzopilot
    started a topic ComponentSchema and Smartgwt 3.1

    ComponentSchema and Smartgwt 3.1

    Hi,

    according to http://www.smartclient.com/smartgwt/javadoc/com/smartgwt/client/docs/ComponentSchema.html (identically found in the smartgwtpower3.1 distribution) it should be possible to define Component Schema to extend basic classes or at least, to pre define some attributes on them.
    I tried this
    NewCustomGrid.ds.xml
    Code:
    <DataSource ID="NewCustomGrid" serverType="component"
	inheritsFrom="ListGrid" instanceConstructor="com.aCompany.client.ui.CustomListGrid"
	autoDraw="false">
</DataSource>
    Screen.ui.xml
    Code:
    <isomorphicXML xmlns:fmt="WEB-INF/">
	<DataSource>
	    <loadID>someBean</loadID>
	</DataSource>
	
	<NewCustomGrid dataSource="ref:someBean" autoFetchData="true" ID="someBeanListGrid" autoDraw="false">
	    <fields>
	       ...
	    </fields>
	    <listEndEditAction>next</listEndEditAction>
	    <showFilterEditor>true</showFilterEditor>
	    <canEdit>true</canEdit>
	    <canRemoveRecords>true</canRemoveRecords>
	</NewCustomGrid>
</isomorphicXML>
    CustomListGrid.java
    Code:
    package com.aCompany.client.ui;

import com.google.gwt.core.client.JavaScriptObject;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.util.SC;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.events.RecordClickEvent;
import com.smartgwt.client.widgets.grid.events.RecordClickHandler;

public class CustomListGrid extends ListGrid {

	public CustomListGrid() {
		super();
		System.out.println("It workds!");
		addRecordClickHandler(new RecordClickHandler() {	
			@Override
			public void onRecordClick(RecordClickEvent event) {
				SC.say("Record Pressed");
			}
		});
	}

	public CustomListGrid(DataSource dataSource) {
		super(dataSource);
		System.out.println("It workds!");
		addRecordClickHandler(new RecordClickHandler() {	
			@Override
			public void onRecordClick(RecordClickEvent event) {
				SC.say("Record Pressed");
			}
		});
	}

	public CustomListGrid(JavaScriptObject jsObj) {
		super(jsObj);
		System.out.println("It workds!");
		addRecordClickHandler(new RecordClickHandler() {	
			@Override
			public void onRecordClick(RecordClickEvent event) {
				SC.say("Record Pressed");
			}
		});
	}

	@Override
	protected JavaScriptObject create() {
		SC.say("It workds!");
		return super.create();
	}
}
    and got the following error (in dev) when above Screen (using this component) was loaded:
    Code:
    12:35:26.719 [ERROR] [com.aCompany.GWTModule] 12:35:26.670:XRP1:WARN:Log:Error when executing loaded screen: TypeError: isc.com is undefined
Stack from error.stack:
    unnamed() @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:306
    unnamed(isc_c_Class_evaluat) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:213
    unnamed(isc_c_Class_globalEvalWithCaptur) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:268
    unnamed(isc_c_RPCManager_loadScreen/_6.callbac) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1242
    unnamed(isc_c_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:256
    unnamed(isc_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:311
    unnamed(isc_c_RPCManager_fireReplyCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1221
    unnamed($wnd.isc.RPCManager.fireReplyCallbac) @ :234
    unnamed(isc_c_RPCManager_fireReplyCallback) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1224
    unnamed(isc_c_RPCManager_performOperationRepl) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1221
    unnamed(isc_c_RPCManager__performTransactionRepl) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1215
    unnamed(isc_c_RPCManager_performTransactionRepl) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1181
    unnamed(anonymou) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:63
    unnamed(isc_c_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:256
    unnamed(isc_c_Comm_performXmlTransactionRepl) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:930
    unnamed(anonymou) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:63
    unnamed(isc_c_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:256
    unnamed(isc_c_Comm__fireXMLCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:912
    unnamed(isc_c_Comm_sendXmlHttpRequest/_1) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:917
    unnamed() @ 
com.smartgwt.client.core.JsObject$SGWT_WARN: 12:35:26.670:XRP1:WARN:Log:Error when executing loaded screen: TypeError: isc.com is undefined
Stack from error.stack:
    unnamed() @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:306
    unnamed(isc_c_Class_evaluat) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:213
    unnamed(isc_c_Class_globalEvalWithCaptur) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:268
    unnamed(isc_c_RPCManager_loadScreen/_6.callbac) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1242
    unnamed(isc_c_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:256
    unnamed(isc_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:311
    unnamed(isc_c_RPCManager_fireReplyCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1221
    unnamed($wnd.isc.RPCManager.fireReplyCallbac) @ :234
    unnamed(isc_c_RPCManager_fireReplyCallback) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1224
    unnamed(isc_c_RPCManager_performOperationRepl) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1221
    unnamed(isc_c_RPCManager__performTransactionRepl) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1215
    unnamed(isc_c_RPCManager_performTransactionRepl) @ com.aCompany.GWTModule/sc/modules/ISC_DataBinding.js:1181
    unnamed(anonymou) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:63
    unnamed(isc_c_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:256
    unnamed(isc_c_Comm_performXmlTransactionRepl) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:930
    unnamed(anonymou) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:63
    unnamed(isc_c_Class_fireCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:256
    unnamed(isc_c_Comm__fireXMLCallbac) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:912
    unnamed(isc_c_Comm_sendXmlHttpRequest/_1) @ com.aCompany.GWTModule/sc/modules/ISC_Core.js:917
    unnamed() @ 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:105)
    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:293)
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
    at java.lang.Thread.run(Thread.java:722)
    Are the docs misleading here (in the sense that this is only possible when defining the component directly as JS class and not as GWT class (which for me is Java)) or did I omit something?

    Thanks,
    fatzopilot
    Tags: None
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