Re: GWT 2.8 compile fails; 2.7 works

Oops! I do get the error. I was wrong when I said it worked for me. When I attempted to change the GWT version from 2.7.0 to 2.8.0 in eclipse, eclipse switched it back to 2.7.0 for reasons I cannot figure out. Given below are the offending UiBinder code, the corresponding Java code, and the stack trace when switching a running application from GWT 2.7 to 2.8. Any help would be greatly appreciated.

<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
  xmlns:g="urn:import:com.google.gwt.user.client.ui"
  xmlns:m="urn:import:gwt.material.design.client.ui">
  <g:HTMLPanel>
    <g:PopupPanel ui:field="launchPad" styleName="launch">
          <m:MaterialColumn ui:field="container" shadow="3">

                  <!-- Dialog title -->

                  <m:MaterialPanel styleName="centeredContentDiv peruseStandardBackground noPadding">
                    <m:MaterialLabel styleName="launchTitle">PeruseLab - Loading your drawings...</m:MaterialLabel>
                    <m:MaterialProgress type="INDETERMINATE" enabled="false" ui:field="progressBar" />
                    <!-- The above shows the progress bar while retrieving drawing(s) for user -->
                  </m:MaterialPanel>
               </m:MaterialColumn>
            </g:PopupPanel>
      </g:HTMLPanel>
</ui:UiBinder>

public class Loader extends Composite {

    interface LoaderUiBinder extends UiBinder<Widget, Loader> {
    }

    private static LoaderUiBinder uiBinder = GWT.create(LoaderUiBinder.class);

    @UiField
    PopupPanel launchPad;

    @UiField
    MaterialColumn container;

    public Loader() {
        initWidget(uiBinder.createAndBindUi(this));
    }

    public void hide() {
        clear();
        launchPad.hide(true);
    }

    public void show() {
        launchPad.show();
    }

    private void clear() {
        while (container.getWidgetCount() > 0) {
            container.remove(0);
        }
    }
}

Caused by: java.lang.NoSuchMethodError: com.google.gwt.uibinder.rebind.UiBinderWriter.<init>(Lcom/google/gwt/core/ext/typeinfo/JClassType;Ljava/lang/String;Ljava/lang/String;Lcom/google/gwt/core/ext/typeinfo/TypeOracle;Lcom/google/gwt/uibinder/rebind/MortalLogger;Lcom/google/gwt/uibinder/rebind/FieldManager;Lcom/google/gwt/uibinder/rebind/messages/MessagesWriter;Lcom/google/gwt/uibinder/rebind/DesignTimeUtils;Lcom/google/gwt/uibinder/rebind/UiBinderContext;ZZLjava/lang/String;Lcom/google/gwt/dev/resource/ResourceOracle;Lcom/google/gwt/resources/rg/GssResourceGenerator$GssOptions;)V
 at com.google.gwt.uibinder.rebind.UiBinderGenerator.generateOnce(UiBinderGenerator.java:174)
 at com.google.gwt.uibinder.rebind.UiBinderGenerator.generate(UiBinderGenerator.java:128)
 at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40)
 at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:745)
 at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:103)
 at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:78)
 at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:262)
 at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:251)
 at com.google.gwt.dev.PrecompilationContextCreator$1.getAllPossibleRebindAnswers(PrecompilationContextCreator.java:86)
 at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createStaticRebindExpression(UnifyAst.java:519)
 at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createRebindExpression(UnifyAst.java:487)
 at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.maybeHandleMagicMethodCall(UnifyAst.java:415)
 at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.visit(UnifyAst.java:402)
 at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:265)
 at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:361)
 at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:273)
 ... 46 more
            [ERROR] at Loader.java(29): GWT.create(Loader$LoaderUiBinder.class)
               com.google.gwt.dev.jjs.ast.JMethodCall
            [ERROR] at Loader.java(29): (Loader$LoaderUiBinder) GWT.create(Loader$LoaderUiBinder.class)
               com.google.gwt.dev.jjs.ast.JCastOperation
            [ERROR] at Loader.java(29): static Loader$LoaderUiBinder uiBinder = (Loader$LoaderUiBinder) GWT.create(Loader$LoaderUiBinder.class)
               com.google.gwt.dev.jjs.ast.JDeclarationStatement
            [ERROR] at Loader.java(24): {
  Composite.$clinit();
  static Loader$LoaderUiBinder uiBinder = (Loader$LoaderUiBinder) GWT.create(Loader$LoaderUiBinder.class);
}
               com.google.gwt.dev.jjs.ast.JBlock
            [ERROR] at Loader.java(24): {
  Composite.$clinit();
  static Loader$LoaderUiBinder uiBinder = (Loader$LoaderUiBinder) GWT.create(Loader$LoaderUiBinder.class);
}
               com.google.gwt.dev.jjs.ast.JMethodBody
            [ERROR] at Loader.java(24): com.snkv.peruse.client.Loader.$clinit()V
               com.google.gwt.dev.jjs.ast.JMethod
      [ERROR] Compiler returned false
      [WARN] recompile failed

On Monday, November 21, 2016 at 4:07:42 PM UTC-5, jgindin wrote:

In our app, we have a UiBinder widget (SomeViewImpl) which has, as its root element, a widget which itself is a UiBinder widget (CollectionManagementLayout).

My UiBinder declaration in SomeViewImpl looks like this:

interface CollectionManagementPanelUiBinder extends UiBinder<CollectionManagementLayout, SomeViewImpl> {}

The UiBinder XML for the SomeViewImpl class starts off like this:

  <collectionmanagement:CollectionManagementLayout ui:field="layout">

    . . . 
  </collectionmanagement:CollectionManagementLayout>

This code compiles just fine in GWT 2.7, but with 2.8, I get the following error:

[ERROR] Errors in 'generated://09CDEAB17C92C8C75AB00C9F2F0DF847/com/myco/myproduct/client/stuff/collections/SomeViewImpl_CollectionManagementPanelUiBinderImpl.java'

      [ERROR] Line 17: The interface UiBinder cannot be implemented more than once with different arguments: UiBinder<CollectionManagementLayout,SomeViewImpl> and UiBinder<CollectionManagementLayout,SomeViewImpl>

      See snapshot: /tmp/com.myco.myproduct.client.stuff.collections.SomeViewImpl_CollectionManagementPanelUiBinderImpl3472216513944602205.java

   Tracing compile failure path for type 'com.myco.myproduct.client.stuff.collections.SomeViewImpl_CollectionManagementPanelUiBinderImpl'

      [ERROR] Errors in 'generated://09CDEAB17C92C8C75AB00C9F2F0DF847/com/myco/myproduct/client/stuff/collections/SomeViewImpl_CollectionManagementPanelUiBinderImpl.java'

         [ERROR] Line 17: The interface UiBinder cannot be implemented more than once with different arguments: UiBinder<CollectionManagementLayout,SomeViewImpl> and UiBinder<CollectionManagementLayout,SomeViewImpl>

The generated code looks like this:

public class SomeViewImpl_CollectionManagementPanelUiBinderImpl 

  implements UiBinder<CollectionManagementLayout, SomeViewImpl>, 

  SomeViewImpl.CollectionManagementPanelUiBinder {

I worked around this by changing the UiBinder declaration in SomeViewImpl to be:

interface CollectionManagementPanelUiBinder extends UiBinder<Widget, SomeViewImpl> {}

My question is: Should this have failed in GWT 2.7? Or is there a bug in GWT 2.8?

thanks,

jay

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