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/**
*
* Copyright 2005 The Apache Software Foundation
*
* 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 org.apache.tuscany.core.config.impl;
import org.apache.tuscany.common.resource.ResourceLoader;
import org.apache.tuscany.core.config.ConfigurationLoadException;
import org.apache.tuscany.core.config.ModuleComponentConfigurationLoader;
import org.apache.tuscany.core.config.ComponentTypeIntrospector;
import org.apache.tuscany.core.config.processor.ProcessorUtils;
import org.apache.tuscany.core.system.context.SystemCompositeContextImpl;
import org.apache.tuscany.core.context.impl.CompositeContextImpl;
import org.apache.tuscany.model.assembly.AssemblyFactory;
import org.apache.tuscany.model.assembly.AssemblyContext;
import org.apache.tuscany.model.assembly.Module;
import org.apache.tuscany.model.assembly.ModuleComponent;
import org.apache.tuscany.model.assembly.ModuleFragment;
import org.apache.tuscany.model.assembly.ComponentType;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* @version $Rev$ $Date$
*/
public abstract class AbstractModuleComponentConfigurationLoader implements ModuleComponentConfigurationLoader {
private static final String SCA_MODULE_FILE_NAME = "sca.module";
//FIXME can fragments have a variable prefix name?
private static final String SCA_FRAGMENT_FILE_NAME = "sca.fragment";
private static final String SYSTEM_MODULE_FILE_NAME = "system.module";
//FIXME can fragments have a variable prefix name?
private static final String SYSTEM_FRAGMENT_FILE_NAME = "system.fragment";
protected final AssemblyContext modelContext;
protected final ResourceLoader resourceLoader;
protected final AssemblyFactory assemblyFactory;
// JFM HACK
private ComponentTypeIntrospector introspector;
private ComponentType systemType;
private ComponentType compositeType;
protected ComponentTypeIntrospector getIntrospector(){
if (introspector == null){
introspector = ProcessorUtils.createCoreIntrospector(assemblyFactory);
}
return introspector;
}
protected ComponentType getSystemCompositeComponentType() throws ConfigurationLoadException {
if (systemType == null){
systemType = getIntrospector().introspect(SystemCompositeContextImpl.class);
}
return systemType;
}
protected ComponentType getCompositeComponentType() throws ConfigurationLoadException {
if (compositeType == null){
compositeType = getIntrospector().introspect(CompositeContextImpl.class);
}
return compositeType;
}
/// JFM HACK
protected AbstractModuleComponentConfigurationLoader(AssemblyContext modelContext) {
this.modelContext = modelContext;
resourceLoader = modelContext.getApplicationResourceLoader();
assemblyFactory = modelContext.getAssemblyFactory();
}
public ModuleComponent loadSystemModuleComponent(String name, String uri) throws ConfigurationLoadException {
ModuleComponent mc = loadModuleComponent(SYSTEM_MODULE_FILE_NAME, SYSTEM_FRAGMENT_FILE_NAME, name, uri);
//JFM HACK - this is completely gross since it overwrites existing component type
mc.getImplementation().setImplementationClass(SystemCompositeContextImpl.class);
mc.getImplementation().setComponentType(getSystemCompositeComponentType());
//END HACK
return mc;
}
public ModuleComponent loadModuleComponent(String name, String uri) throws ConfigurationLoadException {
ModuleComponent mc = loadModuleComponent(SCA_MODULE_FILE_NAME, SCA_FRAGMENT_FILE_NAME, name, uri);
//JFM HACK
mc.getImplementation().setImplementationClass(CompositeContextImpl.class);
mc.getImplementation().setComponentType(getCompositeComponentType());
//END HACK
return mc;
}
protected ModuleComponent loadModuleComponent(String moduleFileName, String fragmentFileName, String name, String uri) throws ConfigurationLoadException {
// Load the sca.module file
URL moduleUrl;
moduleUrl = resourceLoader.getResource(moduleFileName);
if (moduleUrl == null) {
throw new ConfigurationLoadException(moduleFileName);
}
// Load the sca.fragment files
Iterator<URL> i;
try {
i = resourceLoader.getResources(fragmentFileName);
} catch (IOException e) {
throw new ConfigurationLoadException(fragmentFileName, e);
}
List<URL> moduleFragmentUris=new ArrayList<URL>();
while (i.hasNext()) {
URL url=i.next();
moduleFragmentUris.add(url);
}
return loadModuleComponent(name, uri, moduleUrl, moduleFragmentUris);
}
public ModuleComponent loadModuleComponent(String name, String uri, URL url) throws ConfigurationLoadException {
return loadModuleComponent( name, uri, url, null);
}
public ModuleComponent loadModuleComponent(String name, String uri, URL moduleUri, Collection<URL> moduleFragmentUris) throws ConfigurationLoadException {
// Load the module file
Module module=loadModule(moduleUri);
// Load the sca.fragment files
if (moduleFragmentUris!=null) {
for (URL moduleFragmentUri : moduleFragmentUris) {
ModuleFragment moduleFragment=loadModuleFragment(moduleFragmentUri);
module.getModuleFragments().add(moduleFragment);
}
}
// Create the module component
ModuleComponent moduleComponent=assemblyFactory.createModuleComponent();
moduleComponent.setName(name);
moduleComponent.setURI(uri);
moduleComponent.setImplementation(module);
moduleComponent.initialize(modelContext);
return moduleComponent;
}
public abstract Module loadModule(URL url) throws ConfigurationLoadException;
public abstract ModuleFragment loadModuleFragment(URL url) throws ConfigurationLoadException;
}
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