/*
 * Copyright (c) 2005, 2006 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: ValueSpecification.java,v 1.3 2006/05/12 20:38:03 khussey Exp $
 */
package org.eclipse.uml2.uml;

/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>Value Specification</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * A value specification is the specification of a (possibly empty) set of instances, including both objects and data values.
 * ValueSpecification specializes ParameterableElement to specify that a value specification can be exposed as a formal template parameter, and provided as an actual parameter in a binding of a template.
 * <!-- end-model-doc -->
 *
 *
 * @see org.eclipse.uml2.uml.UMLPackage#getValueSpecification()
 * @model abstract="true"
 * @generated
 */
public interface ValueSpecification
		extends PackageableElement, TypedElement {

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The query isComputable() determines whether a value specification can be computed in a model. This operation cannot be fully defined in OCL. A conforming implementation is expected to deliver true for this operation for all value specifications that it can compute, and to compute all of those for which the operation is true. A conforming implementation is expected to be able to compute the value of all literals.
	 * result = false
	 * <!-- end-model-doc -->
	 * @model kind="operation" dataType="org.eclipse.uml2.uml.Boolean" required="true" ordered="false"
	 * @generated
	 */
	boolean isComputable();

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The query integerValue() gives a single Integer value when one can be computed.
	 * result = Set{}
	 * <!-- end-model-doc -->
	 * @model dataType="org.eclipse.uml2.uml.Integer" required="true" ordered="false"
	 * @generated
	 */
	int integerValue();

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The query booleanValue() gives a single Boolean value when one can be computed.
	 * result = Set{}
	 * <!-- end-model-doc -->
	 * @model dataType="org.eclipse.uml2.uml.Boolean" required="true" ordered="false"
	 * @generated
	 */
	boolean booleanValue();

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The query stringValue() gives a single String value when one can be computed.
	 * result = Set{}
	 * <!-- end-model-doc -->
	 * @model dataType="org.eclipse.uml2.uml.String" required="true" ordered="false"
	 * @generated
	 */
	String stringValue();

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The query unlimitedValue() gives a single UnlimitedNatural value when one can be computed.
	 * result = Set{}
	 * <!-- end-model-doc -->
	 * @model dataType="org.eclipse.uml2.uml.UnlimitedNatural" required="true" ordered="false"
	 * @generated
	 */
	int unlimitedValue();

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The query isNull() returns true when it can be computed that the value is null.
	 * result = false
	 * <!-- end-model-doc -->
	 * @model kind="operation" dataType="org.eclipse.uml2.uml.Boolean" required="true" ordered="false"
	 * @generated
	 */
	boolean isNull();

} // ValueSpecification