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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.extension;
import org.apache.tuscany.core.builder.BuilderConfigException;
import org.apache.tuscany.core.builder.BuilderException;
import org.apache.tuscany.core.builder.ContextFactory;
import org.apache.tuscany.core.builder.ContextFactoryBuilder;
import org.apache.tuscany.core.builder.ContextFactoryBuilderRegistry;
import org.apache.tuscany.core.system.annotation.Autowire;
import org.apache.tuscany.core.wire.SourceWireFactory;
import org.apache.tuscany.core.wire.TargetWireFactory;
import org.apache.tuscany.core.wire.service.WireFactoryService;
import org.apache.tuscany.model.assembly.AssemblyObject;
import org.apache.tuscany.model.assembly.Component;
import org.apache.tuscany.model.assembly.ConfiguredProperty;
import org.apache.tuscany.model.assembly.ConfiguredReference;
import org.apache.tuscany.model.assembly.ConfiguredService;
import org.apache.tuscany.model.assembly.Implementation;
import org.apache.tuscany.model.assembly.Multiplicity;
import org.apache.tuscany.model.assembly.Scope;
import org.apache.tuscany.model.assembly.Service;
import org.osoa.sca.annotations.Init;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;
/**
* A runtime extension point for component types. Subclasses must be genericized according to the model implementation type they
* handle, i.e. a subclass of {@link Implementation}, and implement {@link #createContextFactory}.
*
* @version $Rev: 368822 $ $Date: 2006-01-13 10:54:38 -0800 (Fri, 13 Jan 2006) $
* @see org.apache.tuscany.core.builder.ContextFactory
*/
@org.osoa.sca.annotations.Scope("MODULE")
public abstract class ContextFactoryBuilderSupport<T extends Implementation> implements ContextFactoryBuilder {
protected ContextFactoryBuilderRegistry builderRegistry;
protected WireFactoryService wireFactoryService;
protected Class implementationClass;
/**
* Default constructor
*/
public ContextFactoryBuilderSupport() {
// reflect the generic type of the subclass
Type type = this.getClass().getGenericSuperclass();
if (type instanceof ParameterizedType) {
implementationClass = (Class) ((ParameterizedType) type).getActualTypeArguments()[0];
} else {
throw new AssertionError("Subclasses of " + ContextFactoryBuilderSupport.class.getName() + " must be genericized");
}
}
/**
* Constructs a new instance
*
* @param wireFactoryService the system service responsible for creating wire factories
*/
public ContextFactoryBuilderSupport(WireFactoryService wireFactoryService) {
this();
this.wireFactoryService = wireFactoryService;
}
@Init(eager = true)
public void init() {
builderRegistry.register(this);
}
@Autowire
public void setBuilderRegistry(ContextFactoryBuilderRegistry builderRegistry) {
this.builderRegistry = builderRegistry;
}
/**
* Sets the system service used to construct wire factories
*/
@Autowire
public void setWireFactoryService(WireFactoryService wireFactoryService) {
this.wireFactoryService = wireFactoryService;
}
public void build(AssemblyObject modelObject) throws BuilderException {
if (!(modelObject instanceof Component)) {
return;
}
Component nonGenricComponent = (Component) modelObject;
if (!implementationClass.isAssignableFrom(nonGenricComponent.getImplementation().getClass())) {
return;
}
Component<T> component = (Component<T>) modelObject;
List<Service> services = component.getImplementation().getComponentType().getServices();
Scope previous = null;
Scope scope = Scope.INSTANCE;
for (Service service : services) {
// calculate and validate the scope of the component; ensure that all service scopes are the same unless stateless
Scope current = service.getServiceContract().getScope();
if (previous != null && current != null && current != previous
&& (current != Scope.INSTANCE && previous != Scope.INSTANCE)) {
BuilderException e = new BuilderConfigException("Incompatible scopes specified for services on component");
e.setIdentifier(component.getName());
throw e;
}
if (scope != null && current != Scope.INSTANCE) {
scope = current;
}
}
ContextFactory contextFactory;
try {
contextFactory = createContextFactory(component.getName(), component.getImplementation(), scope);
// create target-side wire invocation chains for each service offered by the implementation
for (ConfiguredService configuredService : component.getConfiguredServices()) {
Service service = configuredService.getPort();
TargetWireFactory wireFactory = wireFactoryService.createTargetFactory(configuredService);
contextFactory.addTargetWireFactory(service.getName(), wireFactory);
}
// handle properties
List<ConfiguredProperty> configuredProperties = component.getConfiguredProperties();
if (configuredProperties != null) {
for (ConfiguredProperty property : configuredProperties) {
contextFactory.addProperty(property.getName(), property.getValue());
}
}
// handle references and source side reference chains
List<ConfiguredReference> configuredReferences = component.getConfiguredReferences();
if (configuredReferences != null) {
for (ConfiguredReference reference : configuredReferences) {
if (reference.getPort().getMultiplicity() == Multiplicity.ZERO_N || reference.getPort().getMultiplicity() == Multiplicity.ZERO_ONE){
if (reference.getTargetConfiguredServices().size() < 1 && reference.getTargets().size() <1 ){
continue; // not required, not configured fix TUSCANY-299
}
}
List<SourceWireFactory> wireFactories = wireFactoryService.createSourceFactory(reference);
String refName = reference.getPort().getName();
Class refClass = reference.getPort().getServiceContract().getInterface();
boolean multiplicity = reference.getPort().getMultiplicity() == Multiplicity.ONE_N
|| reference.getPort().getMultiplicity() == Multiplicity.ZERO_N;
contextFactory.addSourceWireFactories(refName, refClass, wireFactories, multiplicity);
}
}
component.setContextFactory(contextFactory);
} catch (BuilderException e) {
e.addContextName(component.getName());
throw e;
}
}
/**
* Subclasses must implement, returning a context factory appropriate to the component implementation
*
* @param componentName the name of the component
* @param implementation the component implementation
* @param scope the component implementation scope
*/
protected abstract ContextFactory createContextFactory(String componentName, T implementation, Scope scope);
}
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