CMAny.java

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 * The Apache Software License, Version 1.1
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 * reserved.
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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) 1999, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
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package com.sun.org.apache.xerces.internal.impl.dtd.models;


/**
 * Content model any node.
 *
 * @xerces.internal
 *
 */
public class CMAny
    extends CMNode {

    //
    // Data
    //

    /**
     * The any content model type. This value is one of the following:
     * XMLContentSpec.CONTENTSPECNODE_ANY,
     * XMLContentSpec.CONTENTSPECNODE_ANY_OTHER,
     * XMLContentSpec.CONTENTSPECNODE_ANY_LOCAL.
     */
    private int fType;

    /**
     * URI of the any content model. This value is set if the type is
     * of the following:
     * XMLContentSpec.CONTENTSPECNODE_ANY,
     * XMLContentSpec.CONTENTSPECNODE_ANY_OTHER.
     */
    private String fURI;

    /**
     * Part of the algorithm to convert a regex directly to a DFA
     * numbers each leaf sequentially. If its -1, that means its an
     * epsilon node. Zero and greater are non-epsilon positions.
     */
    private int fPosition = -1;

    //
    // Constructors
    //

    /** Constructs a content model any. */
    public CMAny(int type, String uri, int position)  {
        super(type);

        // Store the information
        fType = type;
        fURI = uri;
        fPosition = position;
    }

    //
    // Package methods
    //

    final int getType() {
        return fType;
    }

    final String getURI() {
        return fURI;
    }

    final int getPosition()
    {
        return fPosition;
    }

    final void setPosition(int newPosition)
    {
        fPosition = newPosition;
    }

    //
    // CMNode methods
    //

    // package

    public boolean isNullable()
    {
        // Leaf nodes are never nullable unless its an epsilon node
        return (fPosition == -1);
    }

    public String toString()
    {
        StringBuffer strRet = new StringBuffer();
        strRet.append("(");
        strRet.append("##any:uri=");
        strRet.append(fURI);
        strRet.append(')');
        if (fPosition >= 0)
        {
            strRet.append
            (
                " (Pos:"
                + new Integer(fPosition).toString()
                + ")"
            );
        }
        return strRet.toString();
    }

    // protected

    protected void calcFirstPos(CMStateSet toSet)
    {
        // If we are an epsilon node, then the first pos is an empty set
        if (fPosition == -1)
            toSet.zeroBits();

        // Otherwise, its just the one bit of our position
        else
            toSet.setBit(fPosition);
    }

    protected void calcLastPos(CMStateSet toSet)
    {
        // If we are an epsilon node, then the last pos is an empty set
        if (fPosition == -1)
            toSet.zeroBits();

        // Otherwise, its just the one bit of our position
        else
            toSet.setBit(fPosition);
    }

} // class CMAny