Using record.toMap() on a grouped map (or a tree) can crash the browser due to infinite recursion. After performing some operation it seems that the record itself contains a reference to the Tree and when calling record.toMap it starts going infinitely.
After the stackoverflow the browser also doesn't recover.
This was tested on the latest 4.0 nightly, with Firefox 26.0 on GWT 2.5.1.
If you want I can provide a similar example with a TreeGrid.
A safer print of selectThis:
The exception: (trimmed)
After the stackoverflow the browser also doesn't recover.
This was tested on the latest 4.0 nightly, with Firefox 26.0 on GWT 2.5.1.
If you want I can provide a similar example with a TreeGrid.
Code:
package com.genohm.slims.client.gui;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;
import com.google.gwt.user.client.Timer;
import com.smartgwt.client.core.Function;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.events.DataArrivedEvent;
import com.smartgwt.client.widgets.grid.events.DataArrivedHandler;
public class TestGroupGrid implements EntryPoint {
private Record selectThis;
@Override
public void onModuleLoad() {
DataSource.load("Unit", new Function() { //Load datasource (we use dynamic datasources)
@Override
public void execute() {
DataSource ds = DataSource.get("Unit");
final ListGrid listGrid = new ListGrid();
listGrid.setGroupByField("unit_abbreviation");
listGrid.setDataSource(ds);
listGrid.setAutoFetchData(true);
listGrid.addDataArrivedHandler(new DataArrivedHandler() {
@Override
public void onDataArrived(DataArrivedEvent event) {
listGrid.getGroupTree();
if (selectThis != null) {
//reselect the record we need to select
listGrid.selectRecord(listGrid.getRecordIndex(selectThis));
//This will destroy everything!
System.err.println(selectThis.toMap());
} else {
//select the first record (skip the group row)
listGrid.selectRecord(1);
}
}
});
//trigger a refresh
new Timer() {
@Override
public void run() {
//keep the selected record after refresh
selectThis = listGrid.getSelectedRecord();
listGrid.invalidateCache();
listGrid.fetchData();
}
}.schedule(2000);
listGrid.draw();
}
}, false);
GWT.setUncaughtExceptionHandler(new UncaughtExceptionHandler() {
@Override
public void onUncaughtException(Throwable e) {
e.printStackTrace();
}
});
}
}Code:
key: unit_type value: SCALAR
key: unit_fk_dimension value: 1
key: unit_pk value: 1
key: unit_createdOn value: Fri Dec 20 2013 12:18:03 GMT+0100 (CET)
key: unit_abbreviation value:
key: groupParentId value: null
key: _groupTree_isc_ListGrid_0 value: [object Object] <= I think this causes the record to refer to itself ultimately, causing infinite recursion for record.toMap()
key: $42c value: isc_ListGrid_0_groupTree_isc_OID_0
key: _autoAssignedName value: true
key: name value: 0_1
key: _cachedLength_isc_ListGrid_0_groupTree_isc_OID_0 value: 1
key: isFolder value: null
key: _selection_3 value: falseCode:
java.lang.StackOverflowError
at com.google.gwt.dev.util.log.AbstractTreeLogger.causedBySpecialError(AbstractTreeLogger.java:330)
at com.google.gwt.dev.util.log.AbstractTreeLogger.log(AbstractTreeLogger.java:205)
at com.google.gwt.core.ext.TreeLogger.log(TreeLogger.java:281)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:143)
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.GeneratedMethodAccessor107.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.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.GeneratedMethodAccessor107.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
....