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/*
* Copyright (c) 2014 CEA LIST.
*
* 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:
* CEA LIST - Initial API and implementation
*/
package org.eclipse.papyrus.uml.diagram.clazz.expressions;
import java.util.Collections;
import java.util.Map;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EParameter;
import org.eclipse.emf.ecore.EcorePackage;
import org.eclipse.ocl.Environment;
import org.eclipse.ocl.EvaluationEnvironment;
import org.eclipse.ocl.ParserException;
import org.eclipse.ocl.ecore.EcoreFactory;
import org.eclipse.ocl.ecore.OCLExpression;
import org.eclipse.ocl.ecore.Variable;
import org.eclipse.ocl.ecore.OCL.Helper;
import org.eclipse.ocl.options.ParsingOptions;
import org.eclipse.papyrus.uml.diagram.clazz.part.UMLDiagramEditorPlugin;
/**
* @generated
*/
public class UMLOCLFactory {
/**
* @generated
*/
private final UMLAbstractExpression[] expressions;
/**
* @generated
*/
private final String[] expressionBodies;
/**
* @generated
*/
protected UMLOCLFactory() {
this.expressions = new UMLAbstractExpression[1];
this.expressionBodies = new String[] { "\' \'", //$NON-NLS-1$
};
}
/**
* @generated
*/
private static UMLOCLFactory getInstance() {
UMLOCLFactory instance = UMLDiagramEditorPlugin.getInstance().getUMLOCLFactory();
if (instance == null) {
UMLDiagramEditorPlugin.getInstance().setUMLOCLFactory(instance = new UMLOCLFactory());
}
return instance;
}
/**
* @generated
*/
public static String getExpressionBody(int index) {
return getInstance().expressionBodies[index];
}
/**
* @generated
*/
public static UMLAbstractExpression getExpression(int index, EClassifier context, Map<String, EClassifier> environment) {
UMLOCLFactory cached = getInstance();
if (index < 0 || index >= cached.expressions.length) {
throw new IllegalArgumentException();
}
if (cached.expressions[index] == null) {
cached.expressions[index] = getExpression(cached.expressionBodies[index], context, environment == null ? Collections.<String, EClassifier> emptyMap() : environment);
}
return cached.expressions[index];
}
/**
* This is factory method, callers are responsible to keep reference to the return value if they want to reuse parsed expression
* @generated
*/
public static UMLAbstractExpression getExpression(String body, EClassifier context, Map<String, EClassifier> environment) {
return new Expression(body, context, environment);
}
/**
* This method will become private in the next release
* @generated
*/
public static UMLAbstractExpression getExpression(String body, EClassifier context) {
return getExpression(body, context, Collections.<String, EClassifier> emptyMap());
}
/**
* @generated
*/
private static class Expression extends UMLAbstractExpression {
/**
* @generated
*/
private final org.eclipse.ocl.ecore.OCL oclInstance;
/**
* @generated
*/
private OCLExpression oclExpression;
/**
* @generated
*/
public Expression(String body, EClassifier context, Map<String, EClassifier> environment) {
super(body, context);
oclInstance = org.eclipse.ocl.ecore.OCL.newInstance();
initCustomEnv(oclInstance.getEnvironment(), environment);
Helper oclHelper = oclInstance.createOCLHelper();
oclHelper.setContext(context());
try {
oclExpression = oclHelper.createQuery(body());
setStatus(IStatus.OK, null, null);
} catch (ParserException e) {
setStatus(IStatus.ERROR, e.getMessage(), e);
}
}
/**
* @generated
*/
@SuppressWarnings("rawtypes")
protected Object doEvaluate(Object context, Map env) {
if (oclExpression == null) {
return null;
}
// on the first call, both evalEnvironment and extentMap are clear, for later we have finally, below.
EvaluationEnvironment<?, ?, ?, ?, ?> evalEnv = oclInstance.getEvaluationEnvironment();
// initialize environment
for (Object nextKey : env.keySet()) {
evalEnv.replace((String) nextKey, env.get(nextKey));
}
try {
Object result = oclInstance.evaluate(context, oclExpression);
return oclInstance.isInvalid(result) ? null : result;
} finally {
evalEnv.clear();
oclInstance.setExtentMap(null); // clear allInstances cache, and get the oclInstance ready for the next call
}
}
/**
* @generated
*/
private static void initCustomEnv(Environment<?, EClassifier, ?, ?, ?, EParameter, ?, ?, ?, ?, ?, ?> ecoreEnv, Map<String, EClassifier> environment) {
// Use EObject as implicit root class for any object, to allow eContainer() and other EObject operations from OCL expressions
ParsingOptions.setOption(ecoreEnv, ParsingOptions.implicitRootClass(ecoreEnv), EcorePackage.eINSTANCE.getEObject());
for (String varName : environment.keySet()) {
EClassifier varType = environment.get(varName);
ecoreEnv.addElement(varName, createVar(ecoreEnv, varName, varType), false);
}
}
/**
* @generated
*/
private static Variable createVar(Environment<?, EClassifier, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?> ecoreEnv, String name, EClassifier type) {
Variable var = EcoreFactory.eINSTANCE.createVariable();
var.setName(name);
var.setType(ecoreEnv.getUMLReflection().getOCLType(type));
return var;
}
}
}
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