## Class RJavaImport

- java.lang.Object
- - RJavaImport

- All Implemented Interfaces:
    `java.io.Serializable`

      public class RJavaImport
      extends java.lang.Object
      implements java.io.Serializable

  Utilities to manage java packages and how they are "imported" to R databases. This is the back door of the `javaImport` system in the R side
  Author:
    Romain Francois <francoisromain@free.fr>
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static boolean` | `DEBUG` | Debug flag.
    `java.lang.ClassLoader` | `loader` | associated class loader

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `RJavaImport​(java.lang.ClassLoader loader)` | Constructor.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `exists​(java.lang.String clazz)` |
    `boolean` | `exists_​(java.lang.String clazz)` |
    `java.lang.String[]` | `getKnownClasses()` |
    `void` | `importPackage​(java.lang.String packageName)` | Adds a package to the list of "imported" packages
    `void` | `importPackage​(java.lang.String[] packages)` | Adds a set of packages
    `java.lang.Class` | `lookup​(java.lang.String clazz)` | Look for the class in the set of packages
    `static java.lang.Class` | `lookup​(java.lang.String clazz, java.util.Set importers)` |

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### DEBUG

          public static boolean DEBUG

      Debug flag. Prints some messages if it is set to TRUE

    - #### loader

          public java.lang.ClassLoader loader

      associated class loader

  - ### Constructor Detail

    - #### RJavaImport

          public RJavaImport​(java.lang.ClassLoader loader)

      Constructor. Initializes the imported package vector and the cache

  - ### Method Detail

    - #### lookup

          public java.lang.Class lookup​(java.lang.String clazz)

      Look for the class in the set of packages
      Parameters:
        `clazz` - the simple class name
      Returns:
        an instance of Class representing the actual class

    - #### exists

          public boolean exists​(java.lang.String clazz)

      Returns:
        true if the class is known

    - #### exists_

          public boolean exists_​(java.lang.String clazz)

    - #### importPackage

          public void importPackage​(java.lang.String packageName)

      Adds a package to the list of "imported" packages
      Parameters:
        `packageName` - package path name

    - #### importPackage

          public void importPackage​(java.lang.String[] packages)

      Adds a set of packages
      Parameters:
        `packages` - package path names

    - #### getKnownClasses

          public java.lang.String[] getKnownClasses()

      Returns:
        the simple names of the classes currently known by this importer

    - #### lookup

          public static java.lang.Class lookup​(java.lang.String clazz,
                                               java.util.Set importers)