How to migrate to GWT2.7.0 from GWT2.6.0 using Eclipse?
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Jiyuan Zheng
Mar 10, 2015, 12:14:04 PM3/10/15
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Hello, I am currently using GWT2.6.0. I am trying to migrate to 2.7 but things do not work well.
There is no eclipse version for GWT2.7, neither any instructions, so I downloaded the SDK and added it to my project setting.
I also changed module.xml file.
from:
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.6.0//EN"
to:
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.7.0//EN"
But it is unable to compile, and constantly Eclipse complains there is unknown error, or nullPointerException...
I get the following errors during compilation:
[ERROR] An internal compiler exception occurred
com.google.gwt.dev.jjs.InternalCompilerException: Unexpected error during visit.
at com.google.gwt.dev.jjs.ast.JVisitor.translateException(JVisitor.java:121)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:296)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:128)
at com.google.gwt.dev.jjs.ast.JCastOperation.traverse(JCastOperation.java:67)
at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:128)
at com.google.gwt.dev.jjs.ast.JDeclarationStatement.traverse(JDeclarationStatement.java:49)
at com.google.gwt.dev.jjs.ast.JModVisitor$ListContext.traverse(JModVisitor.java:95)
at com.google.gwt.dev.jjs.ast.JModVisitor.acceptWithInsertRemove(JModVisitor.java:351)
at com.google.gwt.dev.jjs.ast.JBlock.traverse(JBlock.java:92)
at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:149)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:145)
at com.google.gwt.dev.jjs.ast.JMethodBody.traverse(JMethodBody.java:83)
at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285)
at com.google.gwt.dev.jjs.ast.JMethod.visitChildren(JMethod.java:600)
at com.google.gwt.dev.jjs.ast.JMethod.traverse(JMethod.java:569)
at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:285)
at com.google.gwt.dev.jjs.impl.UnifyAst.mainLoop(UnifyAst.java:1505)
at com.google.gwt.dev.jjs.impl.UnifyAst.exec(UnifyAst.java:870)
at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.unifyJavaAst(JavaToJavaScriptCompiler.java:1305)
at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.constructJavaAst(JavaToJavaScriptCompiler.java:1038)
at com.google.gwt.dev.jjs.JavaToJavaScriptCompiler$Precompiler.precompile(JavaToJavaScriptCompiler.java:954)
at com.google.gwt.dev.jjs.MonolithicJavaToJavaScriptCompiler.precompile(MonolithicJavaToJavaScriptCompiler.java:303)
at com.google.gwt.dev.jjs.JavaScriptCompiler.precompile(JavaScriptCompiler.java:38)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:286)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:229)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:145)
at com.google.gwt.dev.Compiler.run(Compiler.java:206)
at com.google.gwt.dev.Compiler.run(Compiler.java:158)
at com.google.gwt.dev.Compiler$1.run(Compiler.java:120)
at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:55)
at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:50)
at com.google.gwt.dev.Compiler.main(Compiler.java:127)
Caused by: java.lang.AbstractMethodError: org.apache.xerces.dom.ElementNSImpl.setUserData(Ljava/lang/String;Ljava/lang/Object;Lorg/w3c/dom/UserDataHandler;)Ljava/lang/Object;
at com.google.gwt.uibinder.rebind.W3cDocumentBuilder.startElement(W3cDocumentBuilder.java:127)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at com.google.gwt.uibinder.rebind.W3cDomHelper.documentFor(W3cDomHelper.java:74)
at com.google.gwt.uibinder.rebind.UiBinderGenerator.getW3cDoc(UiBinderGenerator.java:204)
at com.google.gwt.uibinder.rebind.UiBinderGenerator.generateOnce(UiBinderGenerator.java:179)
at com.google.gwt.uibinder.rebind.UiBinderGenerator.generate(UiBinderGenerator.java:127)
at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40)
at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:760)
at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:160)
at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:79)
at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:276)
at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:265)
at com.google.gwt.dev.DistillerRebindPermutationOracle.getAllPossibleRebindAnswers(DistillerRebindPermutationOracle.java:87)
at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createStaticRebindExpression(UnifyAst.java:485)
at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.createRebindExpression(UnifyAst.java:443)
at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.handleMagicMethodCall(UnifyAst.java:576)
at com.google.gwt.dev.jjs.impl.UnifyAst$UnifyVisitor.endVisit(UnifyAst.java:306)
at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:248)
at com.google.gwt.dev.jjs.ast.JModVisitor.traverse(JModVisitor.java:381)
at com.google.gwt.dev.jjs.ast.JModVisitor.accept(JModVisitor.java:293)
... 40 more
[ERROR] at CompInfoEditor.java(21): GWT.create(CompInfoEditor$MyUiBinder.class)
com.google.gwt.dev.jjs.ast.JMethodCall
[ERROR] at CompInfoEditor.java(21): (CompInfoEditor$MyUiBinder) GWT.create(CompInfoEditor$MyUiBinder.class)
com.google.gwt.dev.jjs.ast.JCastOperation
[ERROR] at CompInfoEditor.java(21): static CompInfoEditor$MyUiBinder uiBinder = (CompInfoEditor$MyUiBinder) GWT.create(CompInfoEditor$MyUiBinder.class)
com.google.gwt.dev.jjs.ast.JDeclarationStatement
[ERROR] at CompInfoEditor.java(18): {
ContentPanel.$clinit();
static CompInfoEditor$MyUiBinder uiBinder = (CompInfoEditor$MyUiBinder) GWT.create(CompInfoEditor$MyUiBinder.class);
}
com.google.gwt.dev.jjs.ast.JBlock
[ERROR] at CompInfoEditor.java(18): {
ContentPanel.$clinit();
static CompInfoEditor$MyUiBinder uiBinder = (CompInfoEditor$MyUiBinder) GWT.create(CompInfoEditor$MyUiBinder.class);
}
com.google.gwt.dev.jjs.ast.JMethodBody
[ERROR] at CompInfoEditor.java(18): private static final void $clinit();
com.google.gwt.dev.jjs.ast.JMethod
Jens
Mar 10, 2015, 1:43:31 PM3/10/15
to google-we...@googlegroups.com
GWT packages Apache Xerces 2.11 into gwt-dev.jar but in your class path is a different version (maybe an older one) before the gwt-dev.jar class path entry. This causes GWT to use a Xerces version that has a different API for org.apache.xerces.dom.ElementNSImpl.setUserData() which causes your exception.
So you can either make sure that gwt-dev.jar is the first entry in your class path or you must update the Xerces library in your project.
-- J.
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