Configuring a nested model element with model dsl failes with property type java.io.File

Configuring a nested model element with model dsl failes with property type java.io.File

Gradle script demonstrating the error with Gradle 2.10

apply plugin: 'cpp'

@Managed
interface Inner {

   // works
   // void setFile(String file)
   // String getFile()

   // causes an error
   void setFile(File file)
   File getFile()
}

@Managed
interface Outer {

    ModelMap<Inner> getInners()
}

class MyRuleSource extends RuleSource {
  
    @Model void outers(ModelMap<Outer> outers) {}

}

apply plugin: MyRuleSource

model {
	outers {
		myOuter(Outer) {
			inners {
				myInner(Inner) {
					
					// works
					// file = 'foo'
					
					// causes an error
					file = project.projectDir
				}
			}
		}
	}
}

Errormesage and Stacktrace

C:\Users\me\Desktop>gradle model -s
:model

------------------------------------------------------------
Root project
------------------------------------------------------------

:model FAILED

FAILURE: Build failed with an exception.

* Where:
Build file 'C:\Users\me\Desktop\build.gradle' line: 39

* What went wrong:
Execution failed for task ':model'.
> Exception thrown while executing model rule: myOuter(Outer) { ... } @ build.gradle line 31, column 3 > create(myInner)
   > Attempt to read a write only view of model of type 'org.gradle.model.ModelMap<Inner>' given to rule 'myOuter(Outer) { ... } @ build.gradle line 31, co
lumn 3'

* Try:
Run with --info or --debug option to get more log output.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':model'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)
        at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)
        at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:110)
        at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
        at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23)
        at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43)
        at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37)
        at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30)
        at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:154)
        at org.gradle.internal.Factories$1.create(Factories.java:22)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:52)
        at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:151)
        at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
        at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:99)
        at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:93)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62)
        at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:93)
        at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:82)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:94)
        at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
        at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28)
        at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78)
        at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:48)
        at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:51)
        at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:28)
        at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:43)
        at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:170)
        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237)
        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169)
        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
        at org.gradle.launcher.Main.doAction(Main.java:33)
        at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
        at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54)
        at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35)
        at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
Caused by: org.gradle.model.internal.core.ModelRuleExecutionException: Exception thrown while executing model rule: myOuter(Outer) { ... } @ build.gradle l
ine 31, column 3 > create(myInner)
        at org.gradle.model.internal.registry.DefaultModelRegistry.fireAction(DefaultModelRegistry.java:488)
        at org.gradle.model.internal.registry.DefaultModelRegistry.access$1400(DefaultModelRegistry.java:44)
        at org.gradle.model.internal.registry.DefaultModelRegistry$RunModelAction.apply(DefaultModelRegistry.java:1511)
        at org.gradle.model.internal.registry.DefaultModelRegistry.transitionTo(DefaultModelRegistry.java:379)
        at org.gradle.model.internal.registry.DefaultModelRegistry.get(DefaultModelRegistry.java:350)
        at org.gradle.model.internal.registry.DefaultModelRegistry.require(DefaultModelRegistry.java:330)
        at org.gradle.model.internal.registry.DefaultModelRegistry.realizeNode(DefaultModelRegistry.java:220)
        at org.gradle.api.reporting.model.ModelReport.report(ModelReport.java:72)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:22
7)
        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:220)

        at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:209)

        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:585)
        at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:568)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
        ... 57 more
Caused by: org.gradle.model.WriteOnlyModelViewException: Attempt to read a write only view of model of type 'org.gradle.model.ModelMap<Inner>' given to rul
e 'myOuter(Outer) { ... } @ build.gradle line 31, column 3'
        at org.gradle.model.internal.core.DefaultModelViewState.assertCanReadChildren(DefaultModelViewState.java:65)
        at org.gradle.model.internal.core.NodeBackedModelMap.get(NodeBackedModelMap.java:307)
        at org.gradle.model.internal.core.ModelMapGroovyView.getProperty(ModelMapGroovyView.java:72)
        at build_4cwuss97z0bbak7j0sjpazidz$_run_closure1$_closure2$_closure3$_closure4$_closure5.doCall(C:\Users\joerkeja\Desktop\build.gradle:39)
        at org.gradle.api.internal.ClosureBackedAction.execute(ClosureBackedAction.java:67)
        at org.gradle.model.internal.core.NoInputsModelAction.execute(NoInputsModelAction.java:39)
        at org.gradle.model.internal.core.AbstractModelActionWithView.execute(AbstractModelActionWithView.java:46)
        at org.gradle.model.internal.registry.DefaultModelRegistry$2.run(DefaultModelRegistry.java:483)
        at org.gradle.model.internal.registry.RuleContext.run(RuleContext.java:59)
        at org.gradle.model.internal.registry.DefaultModelRegistry.fireAction(DefaultModelRegistry.java:480)
        ... 72 more


BUILD FAILED

Total time: 2.496 secs