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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.implementation.java.impl;
import java.io.IOException;
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.implementation.java.IntrospectionException;
import org.apache.tuscany.sca.implementation.java.JavaImplementation;
import org.apache.tuscany.sca.implementation.java.JavaImplementationFactory;
import org.apache.tuscany.sca.implementation.java.introspect.JavaClassVisitor;
/**
* A factory for the Java model.
*
* @version $Rev$ $Date$
*/
public abstract class JavaImplementationFactoryImpl implements JavaImplementationFactory {
private List<JavaClassVisitor> visitors = new ArrayList<JavaClassVisitor>();
private JavaClassIntrospectorImpl introspector;
private boolean loaded;
protected ExtensionPointRegistry registry;
public JavaImplementationFactoryImpl(ExtensionPointRegistry registry) {
this.registry = registry;
}
public JavaImplementation createJavaImplementation() {
JavaImplementation javaImplementation = new JavaImplementationImpl();
return javaImplementation;
}
public JavaImplementation createJavaImplementation(Class<?> implementationClass) throws IntrospectionException {
JavaImplementation javaImplementation = createJavaImplementation();
getIntrospector().introspectClass(javaImplementation, implementationClass);
return javaImplementation;
}
public void createJavaImplementation(JavaImplementation javaImplementation, Class<?> implementationClass) throws IntrospectionException {
getIntrospector().introspectClass(javaImplementation, implementationClass);
}
public void addClassVisitor(JavaClassVisitor visitor) {
for (JavaClassVisitor tmpVisitor : visitors){
if (tmpVisitor.getClass() == visitor.getClass()){
// trying to add a duplicate visitor so
// ignore it
return;
}
}
visitors.add(visitor);
}
public void removeClassVisitor(JavaClassVisitor visitor) {
visitors.remove(visitor);
}
public List<JavaClassVisitor> getClassVisitors() {
loadVisitors();
return visitors;
}
/**
* Load visitors declared under META-INF/services
*/
@SuppressWarnings("unchecked")
private synchronized void loadVisitors() {
if (loaded)
return;
// Get the databinding service declarations
Collection<ServiceDeclaration> visitorDeclarations;
try {
visitorDeclarations = registry.getServiceDiscovery().getServiceDeclarations(JavaClassVisitor.class, true);
} catch (IOException e) {
throw new IllegalStateException(e);
}
// Load data bindings
for (ServiceDeclaration visitorDeclaration: visitorDeclarations) {
JavaClassVisitor visitor = null;
try {
Class<JavaClassVisitor> visitorClass = (Class<JavaClassVisitor>)visitorDeclaration.loadClass();
try {
Constructor<JavaClassVisitor> constructor = visitorClass.getConstructor(ExtensionPointRegistry.class);
visitor = constructor.newInstance(registry);
} catch (NoSuchMethodException e) {
visitor = visitorClass.newInstance();
}
} catch (Exception e) {
IllegalStateException ie = new IllegalStateException(e);
throw ie;
}
addClassVisitor(visitor);
}
loaded = true;
}
private synchronized JavaClassIntrospectorImpl getIntrospector() {
if (introspector != null) {
return introspector;
}
introspector = new JavaClassIntrospectorImpl(getClassVisitors());
return introspector;
}
}
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