LetExpOperations.java

/*******************************************************************************
 * Copyright (c) 2008 IBM Corporation, Zeligsoft Inc., 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:
 *   IBM - Initial API and implementation
 *   Zeligsoft - Bug 207365
 *******************************************************************************/
package org.eclipse.ocl.expressions.operations;

import java.util.Map;

import org.eclipse.emf.common.util.BasicDiagnostic;
import org.eclipse.emf.common.util.Diagnostic;
import org.eclipse.emf.common.util.DiagnosticChain;

import org.eclipse.ocl.Environment;
import org.eclipse.ocl.expressions.LetExp;
import org.eclipse.ocl.expressions.OCLExpression;

import org.eclipse.ocl.expressions.util.ExpressionsValidator;
import org.eclipse.ocl.internal.l10n.OCLMessages;
import org.eclipse.ocl.util.OCLUtil;
import org.eclipse.ocl.util.TypeUtil;

/**
 * <!-- begin-user-doc -->
 * A static utility class that provides operations related to '<em><b>Let Exp</b></em>' model objects.
 * <!-- end-user-doc -->
 *
 * <p>
 * The following operations are supported:
 * </p>
 * <ul>
 *   <li>{@link org.eclipse.ocl.expressions.LetExp#checkLetType(org.eclipse.emf.common.util.DiagnosticChain, java.util.Map) <em>Check Let Type</em>}</li>
 * </ul>
 *
 * @generated
 */
public class LetExpOperations
		extends OCLExpressionOperations {

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected LetExpOperations() {
		super();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * type = in.type
	 * @param letExp The receiving '<em><b>Let Exp</b></em>' model object.
	 * @param diagnostics The chain of diagnostics to which problems are to be appended.
	 * @param context The cache of context-specific information.
	 * <!-- end-model-doc -->
	 * @generated NOT
	 */
	public static <C, PM> boolean checkLetType(LetExp<C, PM> letExp,
			DiagnosticChain diagnostics, Map<Object, Object> context) {
		boolean result = true;
		Environment<?, C, ?, ?, PM, ?, ?, ?, ?, ?, ?, ?> env = OCLUtil
			.getValidationEnvironment(letExp, context);

		C type = letExp.getType();
		OCLExpression<C> in = letExp.getIn();

		if ((env != null) && (type != null) && (in != null)) {
			C inType = in.getType();

			if (inType != null) {
				result = TypeUtil.exactTypeMatch(env, type, inType);
			}
		}

		if (!result) {
			if (diagnostics != null) {
				diagnostics.add(new BasicDiagnostic(Diagnostic.ERROR,
					ExpressionsValidator.DIAGNOSTIC_SOURCE,
					ExpressionsValidator.LET_EXP__LET_TYPE,
					OCLMessages.TypeConformanceLetExp_ERROR_,
					new Object[]{letExp}));
			}
		}

		return result;
	}

} // LetExpOperations