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, File file)	Creates a new specific FSDirectory instance
static FSDirectory	newFSDirectory(String clazzName, File file)	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 Detail

newFSDirectory

public static FSDirectory newFSDirectory(String clazzName,
                                         File file)

Creates a specific FSDirectory instance starting from its class name

Parameters:

clazzName - The name of the FSDirectory class to load

file - The file to be used as parameter constructor

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,
                                         File file)
                                  throws NoSuchMethodException,
                                         InstantiationException,
                                         IllegalAccessException,
                                         InvocationTargetException

Creates a new specific FSDirectory instance

Parameters:

clazz - The class of the object to be created

file - 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 File.

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