On gradle projects in Eclipse StringIndexOutOfBoundException from spring-boot annotation processor

[kdvolder]

The reason appears to be that an assumption is made that project output folder must end with the word 'classes' but this is not the case. Output folders in Eclipse are configurable to different locations and in Gradle projects they used the 'default' which is a folder in the project called 'bin'.

!ENTRY org.eclipse.jdt.apt.pluggable.core 1 1 2015-01-14 17:09:12.352
!MESSAGE java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.substring(String.java:1954)
    at org.springframework.boot.configurationprocessor.ConfigurationMetadataAnnotationProcessor.getAdditionalMetadata(ConfigurationMetadataAnnotationProcessor.java:484)
    at org.springframework.boot.configurationprocessor.ConfigurationMetadataAnnotationProcessor.mergeAdditionalMetadata(ConfigurationMetadataAnnotationProcessor.java:442)
    at org.springframework.boot.configurationprocessor.ConfigurationMetadataAnnotationProcessor.writeMetaData(ConfigurationMetadataAnnotationProcessor.java:379)
    at org.springframework.boot.configurationprocessor.ConfigurationMetadataAnnotationProcessor.process(ConfigurationMetadataAnnotationProcessor.java:178)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.handleProcessor(RoundDispatcher.java:139)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.round(RoundDispatcher.java:110)
    at org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:159)
    at org.eclipse.jdt.internal.apt.pluggable.core.dispatch.IdeAnnotationProcessorManager.processAnnotations(IdeAnnotationProcessorManager.java:134)
    at org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:855)
    at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:434)
    at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:367)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.compile(BatchImageBuilder.java:179)
    at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:304)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:61)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:256)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:186)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)