| /******************************************************************************* |
| * Copyright (c) 2014, 2018 Willink Transformations and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v20.html |
| * |
| * Contributors: |
| * E.D.Willink - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ocl.examples.debug.ui.delegate; |
| |
| import java.util.Map; |
| |
| import org.eclipse.emf.ecore.EClassifier; |
| import org.eclipse.emf.ecore.util.QueryDelegate; |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jdt.annotation.Nullable; |
| import org.eclipse.ocl.pivot.internal.delegate.AbstractOCLDelegateFactory; |
| import org.eclipse.ocl.pivot.internal.delegate.OCLDelegateDomain; |
| import org.eclipse.ocl.pivot.utilities.ClassUtil; |
| import org.eclipse.ocl.pivot.utilities.PivotConstants; |
| |
| /** |
| * Factory for OCL query delegates. |
| * <p> |
| * The factory may be obtained by: |
| * <pre> |
| * QueryDelegate.Factory factory = QueryDelegate.Factory.Registry.INSTANCE |
| * .getFactory(OCLDelegateDomain.OCL_DELEGATE_URI); |
| * </pre> |
| * from which a query delegate may be created by: |
| * <pre> |
| * QueryDelegate delegate = factory.createQueryDelegate( |
| * classifier, // the context type |
| * map-of-name-to-classifier, // the external variable names and types |
| * string); // the OCL expression text |
| * </pre> |
| * and (repeatedly) invoked by: |
| * <pre> |
| * Object result = delegate.execute( |
| * target, // the context instance |
| * map-of-name-to-object); // the external variable bindings |
| * </pre> |
| */ |
| public class OCLDebugQueryDelegateFactory extends AbstractOCLDelegateFactory |
| implements QueryDelegate.Factory { |
| public OCLDebugQueryDelegateFactory(@NonNull String delegateURI) { |
| super(delegateURI); |
| } |
| |
| public QueryDelegate createQueryDelegate(EClassifier context, Map<String, EClassifier> parameters, String expression) { |
| if ((context == null) || (expression == null)) { |
| return null; |
| } |
| OCLDelegateDomain delegateDomain = loadDelegateDomain(ClassUtil.nonNullEMF(context.getEPackage())); |
| if (delegateDomain == null) { |
| return null; |
| } |
| return new OCLDebugQueryDelegate(delegateDomain, context, parameters, expression); |
| } |
| |
| /** |
| * The Global variant of the Factory delegates to a local ResourceSet factory if one |
| * can be located at the QueryDelegate.Factory.Registry |
| * by the DelegateResourceSetAdapter. |
| */ |
| public static class Global extends OCLDebugQueryDelegateFactory |
| { |
| public Global() { |
| super(PivotConstants.OCL_DELEGATE_URI_DEBUG); |
| } |
| |
| @Override |
| public QueryDelegate createQueryDelegate(EClassifier context, |
| Map<String, EClassifier> parameters, String expression) { |
| if ((context == null) || (expression == null)) { |
| return null; |
| } |
| Class<QueryDelegate.Factory.@NonNull Registry> castClass = QueryDelegate.Factory.Registry.class; |
| QueryDelegate.Factory.@Nullable Registry localRegistry = OCLDelegateDomain.getDelegateResourceSetRegistry(context, castClass, null); |
| if (localRegistry != null) { |
| QueryDelegate.Factory factory = localRegistry.getFactory(delegateURI); |
| if (factory != null) { |
| return factory.createQueryDelegate(context, parameters, expression); |
| } |
| } |
| return super.createQueryDelegate(context, parameters, expression); |
| } |
| } |
| } |