org.basex.query.util.pkg

Class ModuleLoader

java.lang.Object

org.basex.query.util.pkg.ModuleLoader

public final class ModuleLoader
extends java.lang.Object

Module loader.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Constructor Summary

Constructors

Constructor and Description
ModuleLoader(Context ctx) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addImport(byte[] uri, InputInfo ii, QueryParser qp) Adds a package from the repository or a Java class.
void	close() Closes opened jar files.
java.lang.Class<?>	findClass(java.lang.String clz) Returns a reference to the specified class.
java.lang.Object	findImport(java.lang.String clz) Returns an instance of the specified Java module class.
static java.lang.String	uri2path(java.lang.String uri) Converts a URI to a directory path.

Methods inherited from class java.lang.Object

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

Constructor Detail

ModuleLoader

public ModuleLoader(Context ctx)

Constructor.

Parameters:

ctx - database context

Method Detail

close

public void close()

Closes opened jar files.

addImport

public boolean addImport(byte[] uri,
                InputInfo ii,
                QueryParser qp)
                  throws QueryException

Adds a package from the repository or a Java class.

Parameters:

uri - module uri

ii - input info

qp - query parser

Returns:

if the package has been found

Throws:

QueryException - query exception

findClass

public java.lang.Class<?> findClass(java.lang.String clz)
                             throws java.lang.Throwable

Returns a reference to the specified class.

Parameters:

clz - fully classified class name

Returns:

found class, or null

Throws:

java.lang.Throwable - any exception or error: ClassNotFoundException, LinkageError or ExceptionInInitializerError.

findImport

public java.lang.Object findImport(java.lang.String clz)

Returns an instance of the specified Java module class.

Parameters:

clz - class to be found

Returns:

instance, or null

uri2path

public static java.lang.String uri2path(java.lang.String uri)

Converts a URI to a directory path. The conversion is inspired by Zorba's URI transformation (http://www.zorba-xquery.com/html/documentation/2.2.0/zorba/uriresolvers):

• The URI authority is reversed, and dots are replaced by slashes.
• The URI path is appended. If no path exists, a slash is appended.
• If the resulting string ends with a slash, "index" is appended.
• null is returned if the URI has an invalid syntax.

Parameters:

uri - namespace uri

Returns:

path, or null