Package org.apache.lucene.util

# Class CommandLineUtil

java.lang.Object
org.apache.lucene.util.CommandLineUtil

public final class CommandLineUtil extends Object
Class containing some useful methods used by command line tools

## Method Summary

Modifier and Type
Method
Description
`static Class<? extends Directory>`
`loadDirectoryClass(String clazzName)`
Loads a specific Directory implementation
`static Class<? extends FSDirectory>`
`loadFSDirectoryClass(String clazzName)`
Loads a specific FSDirectory implementation
`static FSDirectory`
`newFSDirectory(Class<? extends FSDirectory> clazz, Path path)`
Creates a new specific FSDirectory instance
`static FSDirectory`
`newFSDirectory(Class<? extends FSDirectory> clazz, Path path, LockFactory lf)`
Creates a new specific FSDirectory instance
`static FSDirectory`
`newFSDirectory(String clazzName, Path path)`
Creates a specific FSDirectory instance starting from its class name, using the default lock factory
`static FSDirectory`
`newFSDirectory(String clazzName, Path path, LockFactory lf)`
Creates a specific FSDirectory instance starting from its class name

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

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

## Method Details

### newFSDirectory

public static FSDirectory newFSDirectory(String clazzName, Path path)
Creates a specific FSDirectory instance starting from its class name, using the default lock factory

Parameters:
  `clazzName` - The name of the FSDirectory class to load
  `path` - The path to be used as parameter constructor
Returns:
  the new FSDirectory instance

### newFSDirectory

public static FSDirectory newFSDirectory(String clazzName, Path path, LockFactory lf)
Creates a specific FSDirectory instance starting from its class name

Parameters:
  `clazzName` - The name of the FSDirectory class to load
  `path` - The path to be used as parameter constructor
  `lf` - The lock factory to be used
Returns:
  the new FSDirectory instance

### loadDirectoryClass

public static Class<? extends Directory> loadDirectoryClass(String clazzName) throws ClassNotFoundException
Loads a specific Directory implementation

Parameters:
  `clazzName` - The name of the Directory class to load
Returns:
  The Directory class loaded
Throws:
  `ClassNotFoundException` - If the specified class cannot be found.

### loadFSDirectoryClass

public static Class<? extends FSDirectory> loadFSDirectoryClass(String clazzName) throws ClassNotFoundException
Loads a specific FSDirectory implementation

Parameters:
  `clazzName` - The name of the FSDirectory class to load
Returns:
  The FSDirectory class loaded
Throws:
  `ClassNotFoundException` - If the specified class cannot be found.

### newFSDirectory

public static FSDirectory newFSDirectory(Class<? extends FSDirectory> clazz, Path path) throws ReflectiveOperationException
Creates a new specific FSDirectory instance

Parameters:
  `clazz` - The class of the object to be created
  `path` - The file to be used as parameter constructor
Returns:
  The new FSDirectory instance
Throws:
  `NoSuchMethodException` - If the Directory does not have a constructor that takes `Path`.
  `InstantiationException` - If the class is abstract or an interface.
  `IllegalAccessException` - If the constructor does not have public visibility.
  `InvocationTargetException` - If the constructor throws an exception
  `ReflectiveOperationException`

### newFSDirectory

public static FSDirectory newFSDirectory(Class<? extends FSDirectory> clazz, Path path, LockFactory lf) throws ReflectiveOperationException
Creates a new specific FSDirectory instance

Parameters:
  `clazz` - The class of the object to be created
  `path` - The file to be used as parameter constructor
  `lf` - The lock factory to be used
Returns:
  The new FSDirectory instance
Throws:
  `NoSuchMethodException` - If the Directory does not have a constructor that takes `Path`.
  `InstantiationException` - If the class is abstract or an interface.
  `IllegalAccessException` - If the constructor does not have public visibility.
  `InvocationTargetException` - If the constructor throws an exception
  `ReflectiveOperationException`