com.sun.star.lib.unoloader

Class UnoClassLoader


public final class UnoClassLoader
extends URLClassLoader

The root UNO class loader.

This class loader is able to load all published URE classes, including the classes representing the published URE UNO types. For consistency, it is important that within each Java UNO environment there is one instance of this class loader that is the defining class loader of all published URE classes (and hence of all unpublished URE classes, too) and of all classes representing UNO types (the published URE UNO types, any unpublished URE UNO types, and any additional UNO types introduced by components; for the latter, UnoClassLoader may be necessary).

This is an internal, unstable class of the Uno Runtime Environment; it should not be used by client code.

Since:
UDK 3.2.0

Constructor Summary

UnoClassLoader(URL base, URL[] classPath, ClassLoader parent)
Instantiates the root UNO class loader.

Method Summary

void
execute(URL jar, String[] arguments)
Executes a UNO JAR.
ClassLoader
getClassLoader(URL jar, Attributes mainAttributes)
Obtains a class loader for a UNO JAR.
static Attributes
getJarMainAttributes(URL jar)
Obtains the main section of the manifest of a JAR.

Constructor Details

UnoClassLoader

public UnoClassLoader(URL base,
                      URL[] classPath,
                      ClassLoader parent)
            throws MalformedURLException
Instantiates the root UNO class loader.
Parameters:
base - a base URL relative to which the URE JARs (java_uno.jar, juh.jar, jurt.jar, ridl.jar) can be found; must not be null.
classPath - an array of URLs that form the class path of this class loader; may be null, which is the same as an empty array. The URLs are interpreted in the same way as the arguments of a URLClassLoader.
parent - the parent class loader for delegation.

Method Details

execute

public void execute(URL jar,
                    String[] arguments)
            throws IOException,
                   ClassNotFoundException,
                   NoSuchMethodException,
                   InvocationTargetException
Executes a UNO JAR.
Parameters:
jar - the URL of a UNO JAR that specifies a Main-Class; must not be null.
arguments - any arguments passed to the main method of the specified Main-Class of the given JAR jar; must not be null.

getClassLoader

public ClassLoader getClassLoader(URL jar,
                                  Attributes mainAttributes)
            throws MalformedURLException
Obtains a class loader for a UNO JAR.
Parameters:
jar - the URL of a UNO JAR; must not be null.
mainAttributes - represents the main section of the manifest of the given JAR jar; null if the given JAR does not have a manifest. (This redundant parameter is there for performance reasons, as typically the caller of this method already has this information available.)
Returns:
an appropriate class loader; will never be null.

getJarMainAttributes

public static Attributes getJarMainAttributes(URL jar)
            throws IOException
Obtains the main section of the manifest of a JAR.
Parameters:
jar - the URL of a JAR; must not be null.
Returns:
the representation of the main section of the manifest of the given JAR jar, or null if the given JAR does not have a manifest.