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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.Collection;
import java.util.List;
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 DefaultDefinitionsProviderExtensionPoint implements
DefinitionsProviderExtensionPoint {
private ExtensionPointRegistry extensionPointRegistry = null;
private boolean loaded;
private List<DefinitionsProvider> scaDefnsProviders = new ArrayList<DefinitionsProvider>();
public DefaultDefinitionsProviderExtensionPoint(ExtensionPointRegistry extnPtReg) {
this.extensionPointRegistry = extnPtReg;
}
public void addDefinitionsProvider(DefinitionsProvider provider) {
scaDefnsProviders.add(provider);
}
public void removeDefinitionsProvider(DefinitionsProvider provider) {
scaDefnsProviders.remove(provider);
}
public List<DefinitionsProvider> getDefinitionsProviders() {
loadProviders();
return scaDefnsProviders;
}
private synchronized void loadProviders() {
if(loaded) {
return;
}
// Get the provider service declarations
Collection<ServiceDeclaration> defnProviderDecls;
DefinitionsProvider aProvider = null;
Class<?> providerClass = null;
Constructor<?> constructor = null;
try {
defnProviderDecls =
ServiceDiscovery.getInstance().getServiceDeclarations(DefinitionsProvider.class.getName());
for (ServiceDeclaration aDefnProviderDecl : defnProviderDecls) {
providerClass = aDefnProviderDecl.loadClass();
try {
constructor = providerClass.getConstructor();
aProvider = (DefinitionsProvider)constructor.newInstance();
} catch (NoSuchMethodException e1) {
constructor = providerClass.getConstructor(ExtensionPointRegistry.class);
aProvider = (DefinitionsProvider)constructor.newInstance(extensionPointRegistry);
}
scaDefnsProviders.add(aProvider);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
loaded = true;
}
}
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