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/*
* 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.tuscany.sca.provider;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
/**
* Concrete Implementation for the SCADefinitionsProviderExtensionPoint
*
* @version $Rev$ $Date$
*/
public class DefaultSCADefinitionsProviderExtensionPoint implements
SCADefinitionsProviderExtensionPoint {
private ExtensionPointRegistry extensionPointRegistry = null;
private List<SCADefinitionsProvider> scaDefnsProviders = new ArrayList<SCADefinitionsProvider>();
public DefaultSCADefinitionsProviderExtensionPoint(ExtensionPointRegistry extnPtReg) {
this.extensionPointRegistry = extnPtReg;
}
public void addSCADefinitionsProvider(SCADefinitionsProvider provider) {
scaDefnsProviders.add(provider);
}
public void removeSCADefinitionsProvider(SCADefinitionsProvider provider) {
scaDefnsProviders.remove(provider);
}
public List<SCADefinitionsProvider> getSCADefinitionsProviders() {
if (scaDefnsProviders.isEmpty()) {
loadProviders();
}
return scaDefnsProviders;
}
private synchronized void loadProviders() {
// Get the provider service declarations
Set<ServiceDeclaration> defnProviderDecls;
SCADefinitionsProvider aProvider = null;
Class providerClass = null;
Constructor constructor = null;
try {
defnProviderDecls =
ServiceDiscovery.getInstance().getServiceDeclarations(SCADefinitionsProvider.class);
for (ServiceDeclaration aDefnProviderDecl : defnProviderDecls) {
providerClass = aDefnProviderDecl.loadClass();
try {
constructor = providerClass.getConstructor();
aProvider = (SCADefinitionsProvider)constructor.newInstance();
} catch (NoSuchMethodException e1) {
constructor = providerClass.getConstructor(ExtensionPointRegistry.class);
aProvider = (SCADefinitionsProvider)constructor.newInstance(extensionPointRegistry);
}
scaDefnsProviders.add(aProvider);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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