/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.openejb.config.provider;
import org.apache.openejb.OpenEJBException;
import org.apache.openejb.config.sys.JaxbOpenejb;
import org.apache.openejb.config.sys.ServiceProvider;
import org.apache.openejb.config.sys.ServicesJar;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* @version $Rev$ $Date$
*/
public class ServiceJarXmlLoader implements ProviderLoader {
private final Map<ID, ServiceProvider> loaded = new LinkedHashMap<ID, ServiceProvider>();
private final List<String> namespaces = new LinkedList<String>();
@Override
public ServiceProvider load(final ID id) {
id.validate();
{ // Already loaded and waiting?
final ServiceProvider provider = loaded.remove(id);
if (provider != null) {
return provider;
}
}
final String namespace = id.getNamespace();
if (namespaces.contains(namespace)) {
return null;
}
namespaces.add(namespace);
parse(namespace);
return load(id);
}
private void parse(final String namespace) {
try {// Load and try again
final ServicesJar servicesJar = JaxbOpenejb.readServicesJar(namespace);
for (final ServiceProvider provider : servicesJar.getServiceProvider()) {
final ID found = new ID(namespace, provider.getId());
loaded.put(found, provider);
}
} catch (final OpenEJBException e) {
throw new IllegalStateException(e);
}
}
@Override
public List<ServiceProvider> load(final String namespace) {
if (!namespaces.contains(namespace)) {
namespaces.add(namespace);
parse(namespace);
}
final List<ServiceProvider> list = new ArrayList<ServiceProvider>();
for (final Map.Entry<ID, ServiceProvider> entry : loaded.entrySet()) {
if (entry.getKey().getNamespace().equals(namespace)) {
list.add(entry.getValue());
}
}
return list;
}
}