| /******************************************************************************* |
| * Copyright (c) 2007, 2010 BMW Car IT, Technische Universitaet Muenchen, and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * BMW Car IT - Initial API and implementation |
| * Technische Universitaet Muenchen - Major refactoring and extension |
| *******************************************************************************/ |
| package org.eclipse.emf.edapt.internal.declaration; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.ParameterizedType; |
| import java.lang.reflect.Type; |
| import java.util.List; |
| |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.emf.ecore.EClassifier; |
| import org.eclipse.emf.ecore.EcorePackage; |
| import org.eclipse.emf.edapt.declaration.Constraint; |
| import org.eclipse.emf.edapt.declaration.DeclarationFactory; |
| import org.eclipse.emf.edapt.declaration.EdaptConstraint; |
| import org.eclipse.emf.edapt.declaration.EdaptOperation; |
| import org.eclipse.emf.edapt.declaration.EdaptParameter; |
| import org.eclipse.emf.edapt.declaration.Operation; |
| import org.eclipse.emf.edapt.declaration.Parameter; |
| |
| /** |
| * Helper class to extract the declaration of an operation from its |
| * implementation. |
| * |
| * @author herrmama |
| * @author $Author$ |
| * @version $Rev$ |
| * @levd.rating YELLOW Hash: 1F4E0BDEACEB10E61508385028C5B1B7 |
| */ |
| public class OperationExtractor { |
| |
| /** |
| * Extract the declaration of an operation from its implementation in a |
| * class. |
| */ |
| @SuppressWarnings("unchecked") |
| public Operation extractOperation(Class c) { |
| |
| final EdaptOperation operationAnnotation = (EdaptOperation) c |
| .getAnnotation(EdaptOperation.class); |
| if (operationAnnotation != null) { |
| final Operation operation = DeclarationFactory.eINSTANCE |
| .createOperation(); |
| operation.setImplementation(c); |
| if (operationAnnotation.identifier().isEmpty()) { |
| operation.setName(c.getName()); |
| } else { |
| operation.setName(operationAnnotation.identifier()); |
| } |
| operation.setLabel(operationAnnotation.label()); |
| operation.setDescription(operationAnnotation.description()); |
| operation.setBreaking(operationAnnotation.breaking()); |
| if (c.getAnnotation(Deprecated.class) != null) { |
| operation.setDeprecated(true); |
| } |
| |
| for (final Field field : c.getFields()) { |
| addParameter(operation, field); |
| } |
| for (final Method method : c.getMethods()) { |
| addConstraint(operation, method); |
| } |
| return operation; |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Add a parameter to the operation declaration based on a field of a class. |
| */ |
| private void addParameter(Operation operation, Field field) { |
| final EdaptParameter parameterAnnotation = field |
| .getAnnotation(EdaptParameter.class); |
| |
| if (parameterAnnotation != null) { |
| final Parameter parameter = DeclarationFactory.eINSTANCE |
| .createParameter(); |
| operation.getParameters().add(parameter); |
| if (parameterAnnotation.main()) { |
| parameter.setMain(true); |
| operation.getParameters().move(0, parameter); |
| } |
| |
| parameter.setName(field.getName()); |
| parameter.setDescription(parameterAnnotation.description()); |
| |
| final Class type = setManyAndReturnType(parameter, field); |
| |
| parameter.setClassifier(getEcoreType(type)); |
| } |
| } |
| |
| /** Determine whether the parameter is many-valued and return its type. */ |
| private Class setManyAndReturnType(Parameter parameter, Field field) { |
| Class type = field.getType(); |
| if (type == List.class) { |
| parameter.setMany(true); |
| final Type t = field.getGenericType(); |
| if (t instanceof ParameterizedType) { |
| final ParameterizedType pt = (ParameterizedType) t; |
| final Type a = pt.getActualTypeArguments()[0]; |
| if (a instanceof Class) { |
| type = (Class) a; |
| } |
| } |
| } |
| return type; |
| } |
| |
| /** Get the ecore type for a class. */ |
| private EClassifier getEcoreType(Class type) { |
| if (type.getPackage() == EClass.class.getPackage()) { |
| return EcorePackage.eINSTANCE.getEClassifier(type.getSimpleName()); |
| } |
| for (final EClassifier classifier : EcorePackage.eINSTANCE.getEClassifiers()) { |
| if (classifier.getInstanceClass() == type) { |
| return classifier; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Add a constraint to the operation declaration based on a method of a |
| * class. |
| */ |
| private void addConstraint(Operation operation, Method method) { |
| final EdaptConstraint constraintAnnotation = method |
| .getAnnotation(EdaptConstraint.class); |
| |
| if (constraintAnnotation != null) { |
| final Constraint constraint = DeclarationFactory.eINSTANCE |
| .createConstraint(); |
| constraint.setName(method.getName()); |
| constraint.setDescription(constraintAnnotation.description()); |
| operation.getConstraints().add(constraint); |
| |
| final String restricts = constraintAnnotation.restricts(); |
| if (!restricts.isEmpty()) { |
| constraint.setRestricts(operation.getParameter(restricts)); |
| } |
| } |
| } |
| |
| } |