/*******************************************************************************
* Copyright 2006 - 2012 Vienna University of Technology,
* Department of Software Technology and Interactive Systems, IFS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package eu.scape_project.planning.services.pa;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import eu.scape_project.planning.services.PlanningServiceException;
import eu.scape_project.planning.services.action.IPreservationActionRegistry;
import eu.scape_project.planning.xml.StrictErrorHandler;
import org.apache.commons.digester3.Digester;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Provides a list of defined preservation service registries. Creates instances
* of preservation service registries.
*
* @author Michael Kraxner
*
*/
public class PreservationActionRegistryFactory {
private static Logger log = LoggerFactory.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);
}
}
static public List<PreservationActionRegistryDefinition> getAvailableRegistries() throws PlanningServiceException {
ArrayList<PreservationActionRegistryDefinition> allRegistries = new ArrayList<PreservationActionRegistryDefinition>();
String configFile = "data/services/PreservationActionRegistries.xml";
InputStream config = Thread.currentThread().getContextClassLoader().getResourceAsStream(configFile);
if (config == null) {
throw new PlanningServiceException("Config file not found: " + 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) {
throw new PlanningServiceException(e);
}
return allRegistries;
}
}