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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
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 */

package com.sun.msv.verifier.regexp;

import com.sun.msv.grammar.AttributeExp;
import com.sun.msv.grammar.DataExp;
import com.sun.msv.grammar.ElementExp;
import com.sun.msv.grammar.ListExp;
import com.sun.msv.grammar.ValueExp;

/**
 * primitive unit of XML instance.
 * 
 * this object is fed to expression.
 * 
 * @author Kohsuke KAWAGUCHI
 */
public abstract class Token
{
    /** returns true if the given ElementExp can consume this token  */
    public boolean match( ElementExp p )        { return false;    }
    public boolean match( AttributeExp p )        { return false; }
    /** returns true if the given DataExp can consume this token */
    public boolean match( DataExp p )            { return false; }
    public boolean match( ValueExp p )            { return false; }
    /** returns true if the given ListExp can consume this token */
    public boolean match( ListExp p )            { return false; }
    
    /** returns true if anyString pattern can consume this token */
    public boolean matchAnyString()            { return false; }

    /** checks if this token is ignorable. */
    boolean isIgnorable() { return false; }
}