/*
 * Copyright (c) 2003, 2005 IBM Corporation 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
 *
 * $Id: StateInvariant.java,v 1.7 2005/06/15 20:06:01 khussey Exp $
 */
package org.eclipse.uml2;

import org.eclipse.emf.ecore.EClass;

/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>State Invariant</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * A StateInvariant is a runtime constraint on the participants of the interaction. It may be used to specify a variety of different kinds of constraints, such as values of attributes or variables, internal or external states, and so on. A StateInvariant is an InteractionFragment and it is placed on a Lifeline. 
 * <!-- end-model-doc -->
 *
 * <p>
 * The following features are supported:
 * <ul>
 *   <li>{@link org.eclipse.uml2.StateInvariant#getInvariant <em>Invariant</em>}</li>
 * </ul>
 * </p>
 *
 * @see org.eclipse.uml2.UML2Package#getStateInvariant()
 * @model
 * @generated
 */
public interface StateInvariant extends InteractionFragment{
	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	String copyright = "Copyright (c) IBM Corporation and others."; //$NON-NLS-1$

	/**
	 * Returns the value of the '<em><b>Invariant</b></em>' containment reference.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Invariant</em>' containment reference isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * A Constraint that should hold at runtime for this StateInvariant
	 * <!-- end-model-doc -->
	 * @return the value of the '<em>Invariant</em>' containment reference.
	 * @see #setInvariant(Constraint)
	 * @see org.eclipse.uml2.UML2Package#getStateInvariant_Invariant()
	 * @model containment="true" required="true"
	 * @generated
	 */
	Constraint getInvariant();

	/**
	 * Sets the value of the '{@link org.eclipse.uml2.StateInvariant#getInvariant <em>Invariant</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Invariant</em>' containment reference.
	 * @see #getInvariant()
	 * @generated
	 */
	void setInvariant(Constraint value);


	/**
	 * Creates a {@link org.eclipse.uml2.Constraint} and sets the '<em><b>Invariant</b></em>' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param eClass The Ecore class of the {@link org.eclipse.uml2.Constraint} to create.
	 * @return The new {@link org.eclipse.uml2.Constraint}.
	 * @see #getInvariant()
	 * @generated
	 */
    Constraint createInvariant(EClass eClass);

	/**
	 * Creates a {@link org.eclipse.uml2.Constraint} and sets the '<em><b>Invariant</b></em>' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return The new {@link org.eclipse.uml2.Constraint}.
	 * @see #getInvariant()
	 * @generated
	 */
    Constraint createInvariant();

} // StateInvariant