Package: org.codehaus.groovy.vmplugin

## [Java] Interface VMPlugin

- Interface to access VM version based actions. This interface is for internal use only!

- - ### Methods Summary

    Methods
    Type Params | Return Type | Name and description
    --- | --- | ---
    `` | `boolean` | `checkAccessible(Class<?> callerClass, Class<?> declaringClass, int memberModifiers, boolean allowIllegalAccess)` check whether the member can be accessed or not
    `` | `boolean` | `checkCanSetAccessible(AccessibleObject accessibleObject, Class<?> callerClass)` Check whether invoking AccessibleObject.setAccessible on the accessible object will be completed successfully
    `` | `void` | `configureAnnotation(AnnotationNode an)`
    `` | `void` | `configureAnnotationNodeFromDefinition(AnnotationNode definition, AnnotationNode root)`
    `` | `void` | `configureClassNode(CompileUnit compileUnit, ClassNode classNode)`
    `` | `Map<String, Set<String>>` | `getDefaultImportClasses(String[] packageNames)` Returns the default import classes: class name -> the relevant package names
    `` | `Object` | `getInvokeSpecialHandle(Method m, Object receiver)` Returns a handle with bound receiver to invokeSpecial the given method.
    `` | `Class[]` | `getPluginDefaultGroovyMethods()`
    `` | `Class[]` | `getPluginStaticGroovyMethods()`
    `` | `int` | `getVersion()` Gives the version the plugin is made for
    `` | `void` | `invalidateCallSites()`
    `` | `Object` | `invokeHandle(Object handle, Object[] args)` Invokes a handle produced by #getInvokeSpecialdHandle
    `` | `void` | `setAdditionalClassInformation(ClassNode c)`
    `` | `MetaMethod` | `transformMetaMethod(MetaClass metaClass, MetaMethod metaMethod, Class<?> caller)` transform meta method
    `` | `MetaMethod` | `transformMetaMethod(MetaClass metaClass, MetaMethod metaMethod)` transform meta method.
    `` | `boolean` | `trySetAccessible(AccessibleObject ao)` Set the `accessible` flag for this reflected object to `true` if possible.

- - ### Method Detail

    - #### public boolean checkAccessible(Class<?> callerClass, Class<?> declaringClass, int memberModifiers, boolean allowIllegalAccess)

      check whether the member can be accessed or not

      Parameters:
        `callerClass` - callerClass the callerClass to invoke `setAccessible`
        `declaringClass` - the type of member owner
        `memberModifiers` - modifiers of member
        `allowIllegalAccess` - whether to allow illegal access
      Returns:
        the result of checking

    - #### public boolean checkCanSetAccessible(AccessibleObject accessibleObject, Class<?> callerClass)

      Check whether invoking AccessibleObject.setAccessible on the accessible object will be completed successfully

      Parameters:
        `accessibleObject` - the accessible object to check
        `callerClass` - the callerClass to invoke `setAccessible`
      Returns:
        the check result

    - #### public void configureAnnotation(AnnotationNode an)

    - #### public void configureAnnotationNodeFromDefinition(AnnotationNode definition, AnnotationNode root)

    - #### public void configureClassNode(CompileUnit compileUnit, ClassNode classNode)

    - #### public Map<String, Set<String>> getDefaultImportClasses(String[] packageNames)

      Returns the default import classes: class name -> the relevant package names

      Parameters:
        `packageNames` - the default import package names, e.g. java.lang.
      Returns:
        the default import classes
      Since:
        3.0.2

    - #### public Object getInvokeSpecialHandle(Method m, Object receiver)

      Returns a handle with bound receiver to invokeSpecial the given method. This method will require at least Java 7, but since the source has to compile on older Java versions as well it is not marked to return a MethodHandle and uses Object instead

      Returns:
        null in case of jdk<7, otherwise a handle that takes the method call arguments for the invokespecial call

    - #### public Class[] getPluginDefaultGroovyMethods()

    - #### public Class[] getPluginStaticGroovyMethods()

    - #### public int getVersion()

      Gives the version the plugin is made for

      Returns:
        7 for jdk7, 8 for jdk8, 9 for jdk9 or higher

    - #### public void invalidateCallSites()

    - #### public Object invokeHandle(Object handle, Object[] args)

      Invokes a handle produced by #getInvokeSpecialdHandle

      Parameters:
        `handle` - the handle
        `args` - arguments for the method call, can be empty but not null
      Returns:
        the result of the method call

    - #### public void setAdditionalClassInformation(ClassNode c)

    - #### public MetaMethod transformMetaMethod(MetaClass metaClass, MetaMethod metaMethod, Class<?> caller)

      transform meta method

      Parameters:
        `metaClass` - meta class
        `metaMethod` - the original meta method
        `caller` - caller class, whose method sets accessible for methods
      Returns:
        the transformed meta method

    - #### public MetaMethod transformMetaMethod(MetaClass metaClass, MetaMethod metaMethod)

      transform meta method.

      Parameters:
        `metaClass` - meta class
        `metaMethod` - the original meta method
      Returns:
        the transformed meta method

    - #### public boolean trySetAccessible(AccessibleObject ao)

      Set the `accessible` flag for this reflected object to `true` if possible.

      throws:
        SecurityException if the request is denied by the security manager
      Parameters:
        `ao` - the accessible object
      Returns:
        `true` if the `accessible` flag is set to `true`; `false` if access cannot be enabled.