/*******************************************************************************
* Copyright (c) 2006-2010 Vienna University of Technology,
* Department of Software Technology and Interactive Systems
*
* All rights reserved. This program and the accompanying
* materials are made available under the terms of the
* Apache License, Version 2.0 which accompanies
* this distribution, and is available at
* http://www.apache.org/licenses/LICENSE-2.0
*******************************************************************************/
package eu.planets_project.pp.plato.services.action;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.digester.Digester;
import org.apache.commons.logging.Log;
import eu.planets_project.pp.plato.util.PlatoLogger;
import eu.planets_project.pp.plato.xml.StrictErrorHandler;
/**
* Provides a list of defined preservation service registries.
* Creates instances of preservation service registries.
*
* @author Michael Kraxner
*
*/
public class PreservationActionRegistryFactory {
private static final Log log = PlatoLogger.getLogger(PreservationActionRegistryFactory.class);
/**
* Returns an instance of a IPreservationActionRegistry,
* which is already connected to the remote endpoint.
*
* @param registry defines type and loaction of the registry
* @return {@link IPreservationActionRegistry}
*/
static public IPreservationActionRegistry getInstance(PreservationActionRegistryDefinition registry) throws IllegalArgumentException {
try {
Class serviceLocatorClass = Class.forName(registry.getType());
Object serviceLocator = serviceLocatorClass.newInstance();
if (serviceLocator instanceof IPreservationActionRegistry) {
IPreservationActionRegistry locator = null;
locator = (IPreservationActionRegistry)serviceLocator;
locator.connect(registry.getUrl());
return locator;
}
else
throw new IllegalArgumentException("schema "+ registry.getType() + " is not a IPreservationActionRegistry.");
} catch (IllegalArgumentException e) {
throw e;
} catch (Exception e) {
throw new IllegalArgumentException("schema '" + registry.getType() + "' is not a IPreservationActionRegistry", e);
}
}
/**
*
* @return a list of all in PreservationActionRegistries.xml defined registries.
* @throws IllegalArgumentException
*/
static public List<PreservationActionRegistryDefinition> getAvailableRegistries() throws IllegalArgumentException{
ArrayList<PreservationActionRegistryDefinition> allRegistries =
new ArrayList<PreservationActionRegistryDefinition>();
String configFile = "data/services/PreservationActionRegistries.xml";
InputStream config = Thread.currentThread().getContextClassLoader().getResourceAsStream(configFile);
Digester digester = new Digester();
digester.setValidating(false);
digester.setErrorHandler(new StrictErrorHandler());
digester.push(allRegistries);
digester.addObjectCreate("*/registry", PreservationActionRegistryDefinition.class);
digester.addBeanPropertySetter("*/registry/shortname", "shortname");
digester.addBeanPropertySetter("*/registry/logo", "logo");
digester.addBeanPropertySetter("*/registry/url", "url");
digester.addBeanPropertySetter("*/registry/type", "type");
digester.addBeanPropertySetter("*/registry/active", "active");
digester.addSetNext("*/registry", "add");
try {
digester.setUseContextClassLoader(true);
digester.parse(config);
} catch (Exception e) {
log.error("Error in config file: " + configFile, e);
}
return allRegistries;
}
}