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package com.sun.org.apache.xerces.internal.impl.xs.models;

import com.sun.org.apache.xerces.internal.impl.dtd.models.CMNode;
import com.sun.org.apache.xerces.internal.impl.dtd.models.CMStateSet;

Content model leaf node.
Author:Neil Graham, IBM
@xerces.internal
/** * Content model leaf node. * * @xerces.internal * * @author Neil Graham, IBM */
public class XSCMLeaf extends CMNode { // // Data //
This is the leaf: element decl or wildcard decl.
/** This is the leaf: element decl or wildcard decl. */
private Object fLeaf = null;
Identify the particle: for UPA checking
/** * Identify the particle: for UPA checking */
private int fParticleId = -1;
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.
/** * 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 leaf.
/** Constructs a content model leaf. */
public XSCMLeaf(int type, Object leaf, int id, int position) { super(type); // Store the element index and position fLeaf = leaf; fParticleId = id; fPosition = position; } // // Package methods // final Object getLeaf() { return fLeaf; } final int getParticleId() { return fParticleId; } 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(fLeaf.toString()); if (fPosition >= 0) { strRet.append ( " (Pos:" + Integer.toString(fPosition) + ")" ); } 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 XSCMLeaf