Eclipse Project Types Definition/Configuration

问题

I am trying to work with a modified version of eclipse that has it's own different project types. For some project types when I Create a project, restart and then delete(with the delete from disc not checked) the project I get the following error:

org.eclipse.core.internal.resources.ResourceException: Resource '/projectName' does not exist.
at org.eclipse.core.internal.resources.Resource.checkExists(Resource.java:341)
at org.eclipse.core.internal.resources.Resource.checkAccessible(Resource.java:215)
at org.eclipse.core.internal.resources.Project.checkAccessible(Project.java:147)
at org.eclipse.core.internal.resources.Resource.checkAccessibleAndLocal(Resource.java:221)
at org.eclipse.core.internal.resources.Resource.touch(Resource.java:1949)
at org.eclipse.core.internal.resources.Project.touch(Project.java:1403)
at org.eclipse.wst.jsdt.internal.core.SetContainerOperation.execute(SetContainerOperation.java:122)
at org.eclipse.wst.jsdt.core.JavaScriptCore.setJsGlobalScopeContainer(JavaScriptCore.java:3901)
at org.eclipse.wst.jsdt.launching.JREContainerInitializer.initialize(JREContainerInitializer.java:48)
at org.eclipse.wst.jsdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2214)
at org.eclipse.wst.jsdt.internal.core.JavaModelManager$6.run(JavaModelManager.java:2144)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2313)
at org.eclipse.wst.jsdt.internal.core.JavaModelManager.initializeAllContainers(JavaModelManager.java:2160)
at org.eclipse.wst.jsdt.internal.core.JavaModelManager.getJsGlobalScopeContainer(JavaModelManager.java:1536)
at org.eclipse.wst.jsdt.core.JavaScriptCore.getJsGlobalScopeContainer(JavaScriptCore.java:1319)
at org.eclipse.wst.jsdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2747)
at org.eclipse.wst.jsdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:2026)
at org.eclipse.wst.jsdt.core.JavaScriptCore.initializeAfterLoad(JavaScriptCore.java:2655)
at org.eclipse.wst.jsdt.internal.ui.InitializeAfterLoadJob$RealJob.run(InitializeAfterLoadJob.java:32)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

!SUBENTRY 1 org.eclipse.core.resources 4 368 2015-07-06 13:39:58.865 !MESSAGE Resource '/projectName' does not exist.

My suspicion is that eclipse does not recognize that as a project or something. So the question is the following : Does anybody know how does eclipse defines the acceptable/available project types ?

回答1:

Your stack trace shows that there is no folder projectName in the workspace, so it does not look like the project exists at all.

The contents of the .project file in the project folder defines what 'natures' and 'builders' a project has. For example a Java plug-in project .project file might look like this:

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
    <name>projectName</name>
    <comment></comment>
    <projects>
    </projects>
    <buildSpec>
        <buildCommand>
            <name>org.eclipse.jdt.core.javabuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.pde.ManifestBuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.pde.SchemaBuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.pde.ds.core.builder</name>
            <arguments>
            </arguments>
        </buildCommand>
    </buildSpec>
    <natures>
        <nature>org.eclipse.pde.PluginNature</nature>
        <nature>org.eclipse.jdt.core.javanature</nature>
    </natures>
</projectDescription>

The IProjectDescription interface provides APIs for setting these values.

来源：https://stackoverflow.com/questions/31245424/eclipse-project-types-definition-configuration