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/*
 * Copyright (c) 2001-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - 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.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR
 * CONTRIBUTORS 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
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 */

package com.sun.msv.grammar;

/**
 * <difference> name class.
 * 
 * @author Kohsuke KAWAGUCHI
 */
public class DifferenceNameClass extends NameClass {
    public final NameClass nc1;
    public final NameClass nc2;
    
    /**
     * accepts a name if it is accepted by nc1 and not by nc2.
     */
    public boolean accepts( String namespaceURI, String localPart ) {
        return nc1.accepts(namespaceURI,localPart)
            && !nc2.accepts(namespaceURI,localPart);
    }
    
    public Object visit( NameClassVisitor visitor ) {
        return visitor.onDifference(this);
    }
    
    public DifferenceNameClass( NameClass nc1, NameClass nc2 ) {
        this.nc1 = nc1;
        this.nc2 = nc2;
    }
    
    public String toString() {
        return nc1.toString()+"-"+nc2.toString();
    }
    
    // serialization support
    private static final long serialVersionUID = 1;    
}