qualifiedrestrictionimpl.java

jena2.5.4推理机系统的一种最基本实现 HP实验室出品

/*****************************************************************************
 * Source code information
 * -----------------------
 * Original author    Ian Dickinson, HP Labs Bristol
 * Author email       [e-mail]
 * Package            Jena 2
 * Web                http://sourceforge.net/projects/jena/
 * Created            08-Sep-2003
 * Filename           $RCSfile: QualifiedRestrictionImpl.java,v $
 * Revision           $Revision: 1.8 $
 * Release status     $State: Exp $
 *
 * Last modified on   $Date: 2007/01/02 11:49:47 $
 *               by   $Author: andy_seaborne $
 *
 * (c) Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 * [See end of file]
 *****************************************************************************/

// Package
///////////////
package com.hp.hpl.jena.ontology.impl;


// Imports
///////////////
import com.hp.hpl.jena.enhanced.*;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.ontology.*;
import com.hp.hpl.jena.rdf.model.*;


/**
 * <p>
 * Implementation of qualied restrictions.
 * </p>
 *
 * @author Ian Dickinson, HP Labs
 *         (<a  href="mailto:[e-mail]" >email</a>)
 * @version CVS $Id: QualifiedRestrictionImpl.java,v 1.8 2007/01/02 11:49:47 andy_seaborne Exp $
 */
public class QualifiedRestrictionImpl
    extends RestrictionImpl
    implements QualifiedRestriction
{
    // Constants
    //////////////////////////////////

    // Static variables
    //////////////////////////////////

    /**
     * A factory for generating QualifiedRestriction facets from nodes in enhanced graphs.
     * Note: should not be invoked directly by user code: use
     * {@link com.hp.hpl.jena.rdf.model.RDFNode#as as()} instead.
     */
    public static Implementation factory = new Implementation() {
        public EnhNode wrap( Node n, EnhGraph eg ) {
            if (canWrap( n, eg )) {
                return new QualifiedRestrictionImpl( n, eg );
            }
            else {
                throw new ConversionException( "Cannot convert node " + n + " to QualifiedRestriction");
            }
        }

        public boolean canWrap( Node node, EnhGraph eg ) 
            { return isValidQualifiedRestriction( node, eg ); }
    };
    
    private static boolean isValidQualifiedRestriction( Node node, EnhGraph eg )
        {
        // node will support being a QualifiedRestriction facet if it has rdf:type owl:Restriction or equivalent
        Profile profile = (eg instanceof OntModel) ? ((OntModel) eg).getProfile() : null;
        return (profile != null)  &&  profile.isSupported( node, eg, QualifiedRestriction.class );
        }
    
    public boolean isValid() 
        { return isValidQualifiedRestriction( asNode(), getGraph() ); }

    // Instance variables
    //////////////////////////////////

    // Constructors
    //////////////////////////////////

    /**
     * <p>
     * Construct a qualified restriction node represented by the given node in the given graph.
     * </p>
     *
     * @param n The node that represents the resource
     * @param g The enh graph that contains n
     */
    public QualifiedRestrictionImpl( Node n, EnhGraph g ) {
        super( n, g );
    }


    // External signature methods
    //////////////////////////////////

    /**
     * <p>Assert that this qualified restriction restricts the property to have a given
     * cardinality and to have values belonging to the class denoted by <code>hasClassQ</code>.
     * Any existing statements for <code>hasClassQ</code>
     * will be removed.</p>
     * @param cls The class to which all of the value of the restricted property must belong
     * @exception OntProfileException If the {@link Profile#HAS_CLASS_Q()} property is not supported in the current language profile.
     */
    public void setHasClassQ( OntClass cls ) {
        setPropertyValue( getProfile().HAS_CLASS_Q(), "HAS_CLASS_Q", cls );
    }

    /**
     * <p>Answer the class or datarnage to which all values of the restricted property belong.</p>
     * @return The ontology class of the restricted property values
     * @exception OntProfileException If the {@link Profile#HAS_CLASS_Q()} property is not supported in the current language profile.
     */
    public OntResource getHasClassQ() {
        checkProfile( getProfile().HAS_CLASS_Q(), "HAS_CLASS_Q" );
        Resource r = getProperty( getProfile().HAS_CLASS_Q() ).getResource();
        if (r.canAs( OntClass.class )) {
            return (OntClass) r.as( OntClass.class );
        }
        else if (r.canAs( DataRange.class )) {
            return (DataRange) r.as( DataRange.class );
        }
        else {
            return (OntResource) r.as( OntResource.class );
        }
    }

    /**
     * <p>Answer true if this qualified property restriction has the given class as
     * the class to which all of the property values must belong.</p>
     * @param cls The class to test against
     * @return True if the given class is the class to which all members of this restriction must belong
     * @exception OntProfileException If the {@link Profile#HAS_CLASS_Q()} property is not supported in the current language profile.
     */
    public boolean hasHasClassQ( OntClass cls ) {
        return hasPropertyValue( getProfile().HAS_CLASS_Q(), "HAS_CLASS_Q", cls );
    }

    /**
     * <p>Answer true if this qualified property restriction has the given datarange as
     * the class to which all of the property values must belong.</p>
     * @param dr The datarange to test against
     * @return True if the given class is the class to which all members of this restriction must belong
     * @exception OntProfileException If the {@link Profile#HAS_CLASS_Q()} property is not supported in the current language profile.
     */
    public boolean hasHasClassQ( DataRange dr ) {
        return hasPropertyValue( getProfile().HAS_CLASS_Q(), "HAS_CLASS_Q", dr );
    }

    /**
     * <p>Remove the statement that this restriction has the given class
     * as the class to which all values must belong.  If this statement
     * is not true of the current model, nothing happens.</p>
     * @param cls The ont class that is the object of the <code>hasClassQ</code> property.
     */
    public void removeHasClassQ( OntClass cls ) {
        Property has_class_q = getProfile().HAS_CLASS_Q();
        removePropertyValue( has_class_q, "HAS_CLASS_Q", cls );
    }

    /**
     * <p>Remove the statement that this restriction has the given datarange
     * as the class to which all values must belong.  If this statement
     * is not true of the current model, nothing happens.</p>
     * @param dr The datarange that is the object of the <code>hasClassQ</code> property.
     */
    public void removeHasClassQ( DataRange dr ) {
        removePropertyValue( getProfile().HAS_CLASS_Q(), "HAS_CLASS_Q", dr );
    }


    // Internal implementation methods
    //////////////////////////////////

    //==============================================================================
    // Inner class definitions
    //==============================================================================

}

/*
 *  (c) Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 *  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */