gwt-editor-processor fails when the Driver has to edit JavaScriptObject

[nchamouard]

Simple example :

import com.google.gwt.core.client.JavaScriptObject;

public class Pojo extends JavaScriptObject {

    protected Pojo(){}

    public final native String getTest() /*-{ return this.test; }-*/;
    public final native void setTest(String value) /*-{ this.test = value; }-*/;
    
}

import org.dominokit.domino.ui.forms.TextBox;
import org.gwtproject.editor.client.Editor;
import org.gwtproject.editor.client.SimpleBeanEditorDriver;
import org.gwtproject.editor.client.annotation.IsDriver;


public class TestEditor implements  Editor<Pojo> {

    @IsDriver
    interface EditorDriver extends SimpleBeanEditorDriver<Pojo, TestEditor> {
    }

    TextBox test;
    
}

Here is the produced stacktrace :

Caused by: java.lang.ClassCastException: class com.sun.tools.javac.code.Type$TypeVar cannot be cast to class javax.lang.model.type.DeclaredType (com.sun.tools.javac.code.Type$TypeVar is in module jdk.compiler of loader 'app'; javax.lang.model.type.DeclaredType is in module java.compiler of loader 'platform')
at org.gwtproject.editor.processor.model.BeanMethod.deepCompare (BeanMethod.java:169)
at org.gwtproject.editor.processor.model.BeanMethod.isReturnTypeEnclosingElement (BeanMethod.java:162)
at org.gwtproject.editor.processor.model.BeanMethod.access$100 (BeanMethod.java:25)
at org.gwtproject.editor.processor.model.BeanMethod$3.matches (BeanMethod.java:82)
at org.gwtproject.editor.processor.model.BeanMethod.which (BeanMethod.java:114)
at org.gwtproject.editor.processor.model.EditorProperty$Builder.findBeanPropertyMethods (EditorProperty.java:176)
at org.gwtproject.editor.processor.model.EditorProperty$Builder.access (EditorProperty.java:149)
at org.gwtproject.editor.processor.model.EditorProperty$Builder.access (EditorProperty.java:60)
at org.gwtproject.editor.processor.model.EditorModel.calculateEditorData (EditorModel.java:115)
at org.gwtproject.editor.processor.model.EditorModel. (EditorModel.java:68)
at org.gwtproject.editor.processor.DriverProcessor.process (DriverProcessor.java:110)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor (JavacProcessingEnvironment.java:985)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs (JavacProcessingEnvironment.java:901)
at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run (JavacProcessingEnvironment.java:1227)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing (JavacProcessingEnvironment.java:1340)
at com.sun.tools.javac.main.JavaCompiler.processAnnotations (JavaCompiler.java:1258)
at com.sun.tools.javac.main.JavaCompiler.compile (JavaCompiler.java:936)
at com.sun.tools.javac.api.JavacTaskImpl.lambda$doCall$0 (JavacTaskImpl.java:104)
at com.sun.tools.javac.api.JavacTaskImpl.handleExceptions (JavacTaskImpl.java:147)
at com.sun.tools.javac.api.JavacTaskImpl.doCall (JavacTaskImpl.java:100)
at com.sun.tools.javac.api.JavacTaskImpl.call (JavacTaskImpl.java:94)
at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess (JavaxToolsCompiler.java:136)
at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile (JavacCompiler.java:182)
at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1209)
at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:198)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:370)
at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:351)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:171)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:163)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:294)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:960)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:566)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)

[FrankHossfeld]

The exception is caused by a cast-method from the JavaScriptObject-class:

  /**
   * A helper method to enable cross-casting from any {@link JavaScriptObject}
   * type to any other {@link JavaScriptObject} type.
   *
   * @param <T> the target type
   * @return this object as a different type
   */
  @SuppressWarnings("unchecked")
  public final <T extends JavaScriptObject> T cast() {
    return (T) this;
  }

The error occurs inside the class BeanMethod during a deepCompare.

I think a simple check using instanceOf should solve the problem.

[nchamouard]

Hello,

As the problem lies in the JavaScriptObject file, I suppose that a fix would need to be in the main gwt package ?
And therefore i cannot expect to see a solution any time soon ?
The alternative for me is to get rid of the JavaScriptObjects, which is feasible (and probably a good thing to do) but would mess with our own schedule :)
Any timing info you could give me would greatly help us to organise ourselves.

Thank you in advance !

[FrankHossfeld]

@nchamouard ATM I am not on my computer. IIRC I had a solution, which needs more testing. I'll came back to you later.

[nchamouard]

We ended replacing all JavaScriptObject and JSNI of our project with JsType(isNative=true)
It took a lot less time than I thought it would
The issue is not a very big problem for us now :)

[FrankHossfeld]

Thanks for the update. I had no time to test. I'll put it on top of the To-Do list.