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/*****************************************************************************
* Copyright (c) 2015 CEA LIST and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Gabriel Pascual (ALL4TEC) gabriel.pascual@all4tec.net - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.textedit.constraintwithessentialocl.xtext;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.papyrus.extensionpoints.editors.configuration.IDirectEditorConstraint;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.uml2.uml.Constraint;
import org.eclipse.uml2.uml.LiteralString;
import org.eclipse.uml2.uml.OpaqueExpression;
import org.eclipse.uml2.uml.ValueSpecification;
/**
* Constraint for OCL Direct Editor.
*
* @author Gabriel Pascual
*
*/
public class OCLDirectEditorConstraint implements IDirectEditorConstraint {
/** The Constant OCL_LANGAGE_CONSTRAINT. */
private static final String OCL_LANGUAGE_CONSTRAINT = "OCL Language Constraint"; //$NON-NLS-1$
/** The Constant OCL_LANGAGE_BODY. */
private static final String OCL_LANGUAGE_BODY = "OCL"; //$NON-NLS-1$
/**
* Constructor.
*
*/
public OCLDirectEditorConstraint() {
}
/**
* @see org.eclipse.papyrus.extensionpoints.editors.configuration.IDirectEditorConstraint#getLabel()
*
* @return
*/
public String getLabel() {
return OCL_LANGUAGE_CONSTRAINT;
}
/**
* @see org.eclipse.papyrus.extensionpoints.editors.configuration.IDirectEditorConstraint#appliesTo(java.lang.Object)
*
* @param selection
* @return
*/
public boolean appliesTo(Object selection) {
boolean appliedConstraint = false;
EObject resolvedEObject = EMFHelper.getEObject(selection);
if (resolvedEObject instanceof Constraint) {
Constraint selectedConstraint = (Constraint) resolvedEObject;
appliedConstraint = checkValueSpecification(selectedConstraint.getSpecification());
}
else if (resolvedEObject instanceof ValueSpecification) {
appliedConstraint = checkValueSpecification((ValueSpecification) resolvedEObject);
}
return appliedConstraint;
}
/**
* check whether a value specification complies with OCL editor
* @param specification
* @return true, if either opaque-expression (empty or OCL as language) or a literal string
*/
public boolean checkValueSpecification(ValueSpecification specification) {
if (specification instanceof OpaqueExpression) {
return ((OpaqueExpression) specification).getBodies().isEmpty() || ((OpaqueExpression) specification).getLanguages().contains(OCL_LANGUAGE_BODY);
}
else {
return specification instanceof LiteralString;
}
}
}
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