## 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
`static boolean` `DEBUG` Debug flag.
`java.lang.ClassLoader` `loader` associated class loader

### Constructor Summary

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

### Method Summary

All Methods Static Methods Instance Methods Concrete Methods
`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)