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GeezerVison is showing docs.oracle.com — ModuleLayer.Controller (Java SE 17 & JDK 17)

Module java.base
Package java.lang

Class ModuleLayer.Controller

java.lang.Object
java.lang.ModuleLayer.Controller
Enclosing class:
ModuleLayer
public static final class ModuleLayer.Controller extends Object
Controls a module layer. The static methods defined by ModuleLayer to create module layers return a Controller that can be used to control modules in the layer.

Unless otherwise specified, passing a null argument to a method in this class causes a NullPointerException to be thrown.

API Note:
Care should be taken with Controller objects, they should never be shared with untrusted code.
Since:
9

  • Method Summary

    Modifier and Type
    Method
    Description
    ModuleLayer.Controller
    addExports(Module source, String pn, Module target)
    Updates module source in the layer to export a package to module target.
    ModuleLayer.Controller
    addOpens(Module source, String pn, Module target)
    Updates module source in the layer to open a package to module target.
    ModuleLayer.Controller
    addReads(Module source, Module target)
    Updates module source in the layer to read module target.
    ModuleLayer
    layer()
    Returns the layer that this object controls.

    Methods declared in class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • layer

      public ModuleLayer layer()
      Returns the layer that this object controls.
      Returns:
      the module layer

    • addReads

      public ModuleLayer.Controller addReads(Module source, Module target)
      Updates module source in the layer to read module target. This method is a no-op if source already reads target.
      Implementation Note:
      Read edges added by this method are weak and do not prevent target from being GC'ed when source is strongly reachable.
      Parameters:
      source - The source module
      target - The target module to read
      Returns:
      This controller
      Throws:
      IllegalArgumentException - If source is not in the module layer
      See Also:
      • Module.addReads(java.lang.Module)

    • addExports

      public ModuleLayer.Controller addExports(Module source, String pn, Module target)
      Updates module source in the layer to export a package to module target. This method is a no-op if source already exports the package to at least target.
      Parameters:
      source - The source module
      pn - The package name
      target - The target module
      Returns:
      This controller
      Throws:
      IllegalArgumentException - If source is not in the module layer or the package is not in the source module
      See Also:
      • Module.addExports(java.lang.String, java.lang.Module)

    • addOpens

      public ModuleLayer.Controller addOpens(Module source, String pn, Module target)
      Updates module source in the layer to open a package to module target. This method is a no-op if source already opens the package to at least target.
      Parameters:
      source - The source module
      pn - The package name
      target - The target module
      Returns:
      This controller
      Throws:
      IllegalArgumentException - If source is not in the module layer or the package is not in the source module
      See Also:
      • Module.addOpens(java.lang.String, java.lang.Module)
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