/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001 The Apache Software Foundation.  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 end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS 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 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.xerces.impl.xs.models;

import org.apache.xerces.xni.QName;
import org.apache.xerces.impl.xs.SubstitutionGroupHandler;


/**
 * XSMixedCM is a derivative of the abstract content model base class that
 * handles a mixed content model with no chilren (elements).
 * In the future, this class may handle a small subset of mixed content
 * model with limited number of children (for example, a mixed content model
 * with one child)
 *
 * This model validated on the way in.
 *
 * @author Elena Litani
 * @author IBM
 * @version $Id$
 */
public class XSMixedCM  implements XSCMValidator {

    //
    // Constants
    //

    // start the content model: did not see any children
    private static final short STATE_START = 0;



    //
    // XSCMValidator methods
    //

    /**
     * This methods to be called on entering a first element whose type
     * has this content model. It will return the initial state of the content model
     *
     * @return Start state of the content model
     */
    public int[] startContentModel(){
        return (new int[] {STATE_START});    
    }


    /**
     * The method corresponds to one transaction in the content model.
     *
     * @param elementName
     * @param state  Current state
     * @return element index corresponding to the element from the Schema grammar
     */
    public Object oneTransition (QName elementName, int[] currentState, SubstitutionGroupHandler subGroupHandler){
        // mixed content model do not have any children

        // error state
        if (currentState[0] == XSCMValidator.FIRST_ERROR) {
            currentState[0] = XSCMValidator.SUBSEQUENT_ERROR;
            return null;
        }

        currentState[0] = XSCMValidator.FIRST_ERROR;
        return null;
    }


    /**
     * The method indicates the end of list of children
     *
     * @param state  Current state of the content model
     * @return true if the last state was a valid final state
     */
    public boolean endContentModel (int[] currentState){
        boolean isFinal =  false;
        int state = currentState[0];

        // error
        if (state < 0) {
            return false;
        }


        return true;
    }


} // class XSMixedCM
@@ -3781,20 +3781,16 @@
 START%7D);
-    
 %0A    %7D%0A%0A
@@ -4896,16 +4896,364 @@
 %0A    %7D%0A%0A
+    /**%0A     * check whether this content violates UPA constraint.%0A     *%0A     * @param errors to hold the UPA errors%0A     * @return true if this content model contains other or list wildcard%0A     */%0A    public boolean checkUniqueParticleAttribution(SubstitutionGroupHandler subGroupHandler) throws XMLSchemaException %7B%0A        return false;%0A    %7D%0A
 %0A%7D // cl

Need to implement a method for UniqueParticleAttribution checking.