问题描述
我目前正在为遗留项目创建 Maven 构建,并且我正在尝试在 Maven 构建中执行 Xtext 语言的编译,如 here 所述。我能够运行构建,但是一旦 maven 启动 Xtext MWE2 工作流程,我就会在工作流程中遇到以下问题:
[ERROR]: GeneratorException: (Element: -UNKNowN-; Reported by: Generator)
org.eclipse.internal.xtend.xtend.parser.ParseException: extraneous input '-' expecting TEXT on line 289
at org.eclipse.internal.xpand2.parser.XpandParseFacade$3.handleError(XpandParseFacade.java:74)
at org.eclipse.internal.xpand2.parser.XpandParseFacade$2.reportError(XpandParseFacade.java:63)
at org.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(BaseRecognizer.java:596)
at org.antlr.runtime.BaseRecognizer.match(BaseRecognizer.java:115)
at org.eclipse.internal.xpand2.parser.XpandParser.template(XpandParser.java:489)
at org.eclipse.internal.xpand2.parser.XpandParseFacade.file(XpandParseFacade.java:40)
at org.eclipse.internal.xpand2.parser.XpandParseFacade.file(XpandParseFacade.java:27)
at org.eclipse.xpand2.XpandExecutionContextImpl$1.parse(XpandExecutionContextImpl.java:174)
at org.eclipse.xtend.expression.ResourceManagerDefaultImpl.loadResource(ResourceManagerDefaultImpl.java:70)
at org.eclipse.xpand2.XpandExecutionContextImpl.findTemplate(XpandExecutionContextImpl.java:286)
at org.eclipse.xpand2.XpandExecutionContextImpl.findTemplate(XpandExecutionContextImpl.java:281)
at org.eclipse.xpand2.XpandExecutionContextImpl.findDeFinition(XpandExecutionContextImpl.java:233)
at org.eclipse.internal.xpand2.ast.ExpandStatement.invokeDeFinition(ExpandStatement.java:236)
at org.eclipse.internal.xpand2.ast.ExpandStatement.evaluateInternal(ExpandStatement.java:228)
at org.eclipse.internal.xpand2.ast.Statement.evaluate(Statement.java:41)
at org.eclipse.internal.xpand2.ast.AbstractDeFinition.evaluate(AbstractDeFinition.java:176)
at org.eclipse.xpand2.XpandFacade.evaluate2(XpandFacade.java:62)
at org.eclipse.xtext.generator.AbstractGeneratorFragment.generate(AbstractGeneratorFragment.java:42)
at org.eclipse.xtext.generator.parser.antlr.AbstractAntlrGeneratorFragment.generate(AbstractAntlrGeneratorFragment.java:98)
at org.eclipse.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment.generate(XtextAntlrGeneratorFragment.java:41)
at org.eclipse.xtext.generator.DefaultGeneratorFragment.generate(DefaultGeneratorFragment.java:122)
at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:154)
at org.eclipse.xtext.generator.Generator.generate(Generator.java:396)
at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:138)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:254)
at java.lang.Thread.run(Thread.java:748)
java.lang.RuntimeException: Problems running workflow at.jku.mevss.cdsl.GenerateConstraintDSL:
[ERROR]: GeneratorException: (Element: -UNKNowN-; Reported by: Generator)
org.eclipse.internal.xtend.xtend.parser.ParseException: extraneous input '-' expecting TEXT on line 289
at org.eclipse.internal.xpand2.parser.XpandParseFacade$3.handleError(XpandParseFacade.java:74)
at org.eclipse.internal.xpand2.parser.XpandParseFacade$2.reportError(XpandParseFacade.java:63)
at org.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(BaseRecognizer.java:596)
at org.antlr.runtime.BaseRecognizer.match(BaseRecognizer.java:115)
at org.eclipse.internal.xpand2.parser.XpandParser.template(XpandParser.java:489)
at org.eclipse.internal.xpand2.parser.XpandParseFacade.file(XpandParseFacade.java:40)
at org.eclipse.internal.xpand2.parser.XpandParseFacade.file(XpandParseFacade.java:27)
at org.eclipse.xpand2.XpandExecutionContextImpl$1.parse(XpandExecutionContextImpl.java:174)
at org.eclipse.xtend.expression.ResourceManagerDefaultImpl.loadResource(ResourceManagerDefaultImpl.java:70)
at org.eclipse.xpand2.XpandExecutionContextImpl.findTemplate(XpandExecutionContextImpl.java:286)
at org.eclipse.xpand2.XpandExecutionContextImpl.findTemplate(XpandExecutionContextImpl.java:281)
at org.eclipse.xpand2.XpandExecutionContextImpl.findDeFinition(XpandExecutionContextImpl.java:233)
at org.eclipse.internal.xpand2.ast.ExpandStatement.invokeDeFinition(ExpandStatement.java:236)
at org.eclipse.internal.xpand2.ast.ExpandStatement.evaluateInternal(ExpandStatement.java:228)
at org.eclipse.internal.xpand2.ast.Statement.evaluate(Statement.java:41)
at org.eclipse.internal.xpand2.ast.AbstractDeFinition.evaluate(AbstractDeFinition.java:176)
at org.eclipse.xpand2.XpandFacade.evaluate2(XpandFacade.java:62)
at org.eclipse.xtext.generator.AbstractGeneratorFragment.generate(AbstractGeneratorFragment.java:42)
at org.eclipse.xtext.generator.parser.antlr.AbstractAntlrGeneratorFragment.generate(AbstractAntlrGeneratorFragment.java:98)
at org.eclipse.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment.generate(XtextAntlrGeneratorFragment.java:41)
at org.eclipse.xtext.generator.DefaultGeneratorFragment.generate(DefaultGeneratorFragment.java:122)
at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:154)
at org.eclipse.xtext.generator.Generator.generate(Generator.java:396)
at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:138)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:254)
at java.lang.Thread.run(Thread.java:748)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:104)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:254)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException:
[ERROR]: GeneratorException: (Element: -UNKNowN-; Reported by: Generator)
org.eclipse.internal.xtend.xtend.parser.ParseException: extraneous input '-' expecting TEXT on line 289
at org.eclipse.internal.xpand2.parser.XpandParseFacade$3.handleError(XpandParseFacade.java:74)
at org.eclipse.internal.xpand2.parser.XpandParseFacade$2.reportError(XpandParseFacade.java:63)
at org.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(BaseRecognizer.java:596)
at org.antlr.runtime.BaseRecognizer.match(BaseRecognizer.java:115)
at org.eclipse.internal.xpand2.parser.XpandParser.template(XpandParser.java:489)
at org.eclipse.internal.xpand2.parser.XpandParseFacade.file(XpandParseFacade.java:40)
at org.eclipse.internal.xpand2.parser.XpandParseFacade.file(XpandParseFacade.java:27)
at org.eclipse.xpand2.XpandExecutionContextImpl$1.parse(XpandExecutionContextImpl.java:174)
at org.eclipse.xtend.expression.ResourceManagerDefaultImpl.loadResource(ResourceManagerDefaultImpl.java:70)
at org.eclipse.xpand2.XpandExecutionContextImpl.findTemplate(XpandExecutionContextImpl.java:286)
at org.eclipse.xpand2.XpandExecutionContextImpl.findTemplate(XpandExecutionContextImpl.java:281)
at org.eclipse.xpand2.XpandExecutionContextImpl.findDeFinition(XpandExecutionContextImpl.java:233)
at org.eclipse.internal.xpand2.ast.ExpandStatement.invokeDeFinition(ExpandStatement.java:236)
at org.eclipse.internal.xpand2.ast.ExpandStatement.evaluateInternal(ExpandStatement.java:228)
at org.eclipse.internal.xpand2.ast.Statement.evaluate(Statement.java:41)
at org.eclipse.internal.xpand2.ast.AbstractDeFinition.evaluate(AbstractDeFinition.java:176)
at org.eclipse.xpand2.XpandFacade.evaluate2(XpandFacade.java:62)
at org.eclipse.xtext.generator.AbstractGeneratorFragment.generate(AbstractGeneratorFragment.java:42)
at org.eclipse.xtext.generator.parser.antlr.AbstractAntlrGeneratorFragment.generate(AbstractAntlrGeneratorFragment.java:98)
at org.eclipse.xtext.generator.parser.antlr.XtextAntlrGeneratorFragment.generate(XtextAntlrGeneratorFragment.java:41)
at org.eclipse.xtext.generator.DefaultGeneratorFragment.generate(DefaultGeneratorFragment.java:122)
at org.eclipse.xtext.generator.CompositeGeneratorFragment.generate(CompositeGeneratorFragment.java:154)
at org.eclipse.xtext.generator.Generator.generate(Generator.java:396)
at org.eclipse.xtext.generator.Generator.invokeInternal(Generator.java:138)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:126)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:34)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:62)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:52)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:254)
at java.lang.Thread.run(Thread.java:748)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.handleIssues(Mwe2Bridge.java:56)
at org.eclipse.emf.mwe.core.lib.Mwe2Bridge.invoke(Mwe2Bridge.java:48)
at org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent.invoke(AbstractWorkflowComponent.java:201)
at org.eclipse.emf.mwe2.runtime.workflow.AbstractCompositeWorkflowComponent.invoke(AbstractCompositeWorkflowComponent.java:35)
at org.eclipse.emf.mwe2.runtime.workflow.Workflow.run(Workflow.java:19)
at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:102)
... 6 more
我搜索了一些并试图找到一种方法来使生成器更加冗长,但找不到任何东西。不幸的是,我无法从错误消息中真正找到错误的来源,因为它说导致问题的元素未知。
我还用该语言手动检查了 .xtext 文件中是否有任何松散的“-”符号,但没有找到。 关于如何调试此问题的任何线索?我什至不确定从哪里开始挖掘。
解决方法
根据您的comment,无法提供有关该项目的更多信息。相反,您正在寻找进一步调查根本原因的可能性。
我建议使用 mvnDebug
。此命令随 Maven 一起提供,允许您调试 Maven 插件的执行。要正确设置它,您需要一个带有插件源代码的 Eclipse(或任何 IDE)。我猜,您正在使用链接中显示的 xtext-maven-plugin
。要获取源代码,我发现最简单的方法是使用插件作为依赖项设置一个新的 Maven 项目。确保版本相同,否则调试会产生有趣的结果。
<dependency>
<groupId>org.eclipse.xtext</groupId>
<artifactId>xtext-maven-plugin</artifactId>
<version>${xtext-version}</version>
</dependency>
在您要调查的类之一中设置断点(例如 org.eclipse.internal.xpand2.parser.XpandParser.template(XpandParser.java:489)
)然后您使用
mvnDebug verify
(或您使用的任何目标)而不是
mvn verify
Maven 然后将等待远程调试器附加到其进程。在 Eclipse 中,您创建一个 Remote Java Application
类型的新调试配置并通过调试按钮启动它。
从那里您可以使用标准调试技术来查看错误发生的位置。