| /******************************************************************************* |
| * Copyright (c) 2011, 2020 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.pivot.internal.ecore; |
| |
| import java.util.List; |
| |
| import org.eclipse.emf.ecore.EOperation; |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jdt.annotation.Nullable; |
| import org.eclipse.ocl.pivot.ExpressionInOCL; |
| import org.eclipse.ocl.pivot.OCLExpression; |
| import org.eclipse.ocl.pivot.Operation; |
| import org.eclipse.ocl.pivot.OperationCallExp; |
| import org.eclipse.ocl.pivot.TypedElement; |
| import org.eclipse.ocl.pivot.Variable; |
| import org.eclipse.ocl.pivot.evaluation.EvaluationEnvironment; |
| import org.eclipse.ocl.pivot.evaluation.Executor; |
| import org.eclipse.ocl.pivot.internal.utilities.EnvironmentFactoryInternal.EnvironmentFactoryInternalExtension; |
| import org.eclipse.ocl.pivot.library.AbstractOperation; |
| import org.eclipse.ocl.pivot.utilities.ClassUtil; |
| import org.eclipse.ocl.pivot.utilities.ParserException; |
| import org.eclipse.ocl.pivot.utilities.PivotUtil; |
| import org.eclipse.ocl.pivot.values.InvalidValueException; |
| |
| /** |
| * An EObjectOperation provides the standard LibraryOperation to implement an EOperation defined by an OCL specification. |
| * The specification is resolved lazily and so an invalid specification may throw an InvalidValueException at run-time. |
| */ |
| public class EObjectOperation extends AbstractOperation |
| { |
| protected final @NonNull Operation operation; |
| protected final @NonNull EOperation eFeature; |
| protected final @NonNull ExpressionInOCL specification; |
| |
| public EObjectOperation(@NonNull Operation operation, @NonNull EOperation eFeature, @NonNull ExpressionInOCL specification) { |
| this.operation = operation; |
| this.eFeature = eFeature; |
| this.specification = specification; |
| } |
| |
| /** |
| * @since 1.3 |
| */ |
| @Override |
| public @Nullable Object basicEvaluate(@NonNull Executor executor, @NonNull TypedElement caller, @Nullable Object @NonNull [] boxedSourceAndArgumentValues) { |
| if (specification.getOwnedBody() == null) { |
| try { |
| EnvironmentFactoryInternalExtension environmentFactory = (EnvironmentFactoryInternalExtension) executor.getEnvironmentFactory(); |
| environmentFactory.parseSpecification(specification); |
| } catch (ParserException e) { |
| throw new InvalidValueException(e, "parse failure", executor.getEvaluationEnvironment(), boxedSourceAndArgumentValues[0], caller); |
| } |
| } |
| ExpressionInOCL query = specification; |
| EvaluationEnvironment nestedEvaluationEnvironment = executor.pushEvaluationEnvironment(query, caller); |
| nestedEvaluationEnvironment.add(ClassUtil.nonNullModel(query.getOwnedContext()), boxedSourceAndArgumentValues[0]); |
| List<Variable> parameterVariables = query.getOwnedParameters(); |
| int iMax = Math.min(parameterVariables.size(), boxedSourceAndArgumentValues.length-1); |
| for (int i = 0; i < iMax; i++) { |
| nestedEvaluationEnvironment.add(ClassUtil.nonNullModel(parameterVariables.get(i)), boxedSourceAndArgumentValues[i+1]); |
| } |
| try { |
| return executor.evaluate(ClassUtil.nonNullPivot(query.getOwnedBody())); |
| } |
| finally { |
| executor.popEvaluationEnvironment(); |
| } |
| } |
| |
| @Override |
| public @Nullable Object dispatch(@NonNull Executor executor, @NonNull OperationCallExp callExp, @Nullable Object sourceValue) { |
| assert !PivotUtil.getReferredOperation(callExp).isIsValidating(); |
| List<@NonNull OCLExpression> arguments = ClassUtil.nullFree(callExp.getOwnedArguments()); |
| @Nullable Object[] sourceAndArgumentValues = new @Nullable Object[1+arguments.size()]; |
| int argumentIndex = 0; |
| sourceAndArgumentValues[argumentIndex++] = sourceValue; |
| for (@NonNull OCLExpression argument : arguments) { |
| sourceAndArgumentValues[argumentIndex++] = executor.evaluate(argument); |
| } |
| return evaluate(executor, callExp, sourceAndArgumentValues); |
| } |
| } |