v2/src/marshal/org/apache/xmlbeans/impl/marshal/CharacterVisitor.java

/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2003 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 "Apache" 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
*    XMLBeans", 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
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* 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) 2000-2003 BEA Systems
* Inc., <http://www.bea.com/>. For more information on the Apache Software
* Foundation, please see <http://www.apache.org/>.
*/

package org.apache.xmlbeans.impl.marshal;

import javax.xml.namespace.QName;
import java.util.Collection;

final class CharacterVisitor
    extends XmlTypeVisitor
{
    private final CharSequence chars;

    CharacterVisitor(RuntimeBindingProperty property,
                     Object parentObject,
                     MarshallerImpl context)
    {
        super(parentObject, property, context);
        assert (!(parentObject instanceof Collection));

        //we are getting the lexical value here because in certain cases
        //this action could end up modifying the namespace context.
        //(qname, type substitution).
        if (parentObject == null) {
            //REVIEW: should this be a special subclass for nil types?
            //Any use of this value should cause an npe later on.
            chars = null;
        } else {
            chars = grabChars();
        }
    }


    protected int getState()
    {
        return CHARS;
    }

    protected int advance()
    {
        return CHARS;
    }

    public XmlTypeVisitor getCurrentChild()
    {
        throw new AssertionError("no children");
    }

    protected QName getName()
    {
        throw new AssertionError("no name on " + this);
    }

    protected int getAttributeCount()
    {
        return 0;
    }

    protected String getAttributeValue(int idx)
    {
        throw new AssertionError("no attributes on " + this);
    }

    protected QName getAttributeName(int idx)
    {
        throw new AssertionError("no attributes on " + this);
    }

    protected CharSequence getCharData()
    {
        return chars;
    }

    private CharSequence grabChars()
    {
        final Object parent = getParentObject();
        assert parent != null : "bad visitor: this=" + this;
        return getBindingProperty().getLexical(parent, marshalContext);
    }

}