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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.spi.implementation.impl;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;

import org.apache.tuscany.contribution.processor.StAXArtifactProcessorExtensionPoint;
import org.apache.tuscany.core.ExtensionPointRegistry;
import org.apache.tuscany.core.ModuleActivator;
import org.apache.tuscany.databinding.DataBindingExtensionPoint;
import org.apache.tuscany.databinding.Mediator;
import org.apache.tuscany.spi.builder.BuilderRegistry;
import org.apache.tuscany.spi.implementation.ImplementationActivator;

public class ImplementationSPIModuleActivator implements ModuleActivator {

    private Collection<ImplementationArtifactProcessor> as = new ArrayList();

    public ImplementationSPIModuleActivator() {
    }
    
    public void start(ExtensionPointRegistry epRegistry) {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        Collection<ImplementationActivator> ias = Discovery.getInstances(classLoader, ImplementationActivator.class);

        StAXArtifactProcessorExtensionPoint artifactProcessors = epRegistry.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
        BuilderRegistry builderRegistry = epRegistry.getExtensionPoint(BuilderRegistry.class);

        for (ImplementationActivator ia : ias) {

            ImplementationArtifactProcessor implementationArtifactProcessor = new ImplementationArtifactProcessor(ia);
            artifactProcessors.addExtension(implementationArtifactProcessor);
            as.add(implementationArtifactProcessor);

            ImplementationBuilder builder = new ImplementationBuilder(ia);
            builder.setBuilderRegistry(builderRegistry);
            builderRegistry.register(ia.getImplementationClass(), builder);

            Mediator mediator = epRegistry.getExtensionPoint(Mediator.class);
            PropertyValueObjectFactory factory = new PropertyValueObjectFactory(mediator);
            builder.setPropertyValueObjectFactory(factory);

            DataBindingExtensionPoint dataBindingRegistry = epRegistry.getExtensionPoint(DataBindingExtensionPoint.class);
            builder.setDataBindingRegistry(dataBindingRegistry);

            builder.init();
        }
    }

    public void stop(ExtensionPointRegistry epRegistry) {
        StAXArtifactProcessorExtensionPoint artifactProcessors = epRegistry.getExtensionPoint(StAXArtifactProcessorExtensionPoint.class);
        for (ImplementationArtifactProcessor iap : as) {
            artifactProcessors.removeExtension(iap);
        }
    }

    public Map<Class, Object> getExtensionPoints() {
        return null;
    }

}