content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 1999-2002,2004 The Apache Software Foundation.
   *
   * Licensed 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.
   */
  
  package jaxp.sun.org.apache.xerces.internal.impl.xs.models;
  
  import jaxp.sun.org.apache.xerces.internal.impl.dtd.models.CMNode;
  import jaxp.sun.org.apache.xerces.internal.impl.dtd.models.CMStateSet;
  
  /**
   * 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. */
      private Object fLeaf = null;
  
      /**
       * 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.
       */
      private int fPosition = -1;
  
      //
      // Constructors
      //
  
      /** 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
  