/*
 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
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package com.sun.org.apache.xerces.internal.impl.dtd.models;

import com.sun.org.apache.xerces.internal.impl.dtd.XMLContentSpec;
import com.sun.org.apache.xerces.internal.xni.QName;

Content model leaf node.
@xerces.internal
/** * Content model leaf node. * * @xerces.internal * */
public class CMLeaf extends CMNode { // // Data //
This is the element that this leaf represents.
/** This is the element that this leaf represents. */
private QName fElement = new QName();
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 CMLeaf(QName element, int position) { super(XMLContentSpec.CONTENTSPECNODE_LEAF); // Store the element index and position fElement.setValues(element); fPosition = position; }
Constructs a content model leaf.
/** Constructs a content model leaf. */
public CMLeaf(QName element) { super(XMLContentSpec.CONTENTSPECNODE_LEAF); // Store the element index and position fElement.setValues(element); } // // Package methods // final QName getElement() { return fElement; } 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() { StringBuilder strRet = new StringBuilder(fElement.toString()); strRet.append(" ("); strRet.append(fElement.uri); strRet.append(','); strRet.append(fElement.localpart); strRet.append(')'); if (fPosition >= 0) { strRet.append ( " (Pos:" + 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 CMLeaf