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 1999-2004 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.
   */
  /*
   * $Id: ExpressionNode.java,v 1.1.2.1 2005/08/01 01:30:15 jeffsuttor Exp $
   */
  package jaxp.sun.org.apache.xpath.internal;
  
  import jaxp.xml.transform.SourceLocator;
  
  /**
   * A class that implements this interface can construct expressions,
   * give information about child and parent expressions,
   * and give the originating source information.  A class that implements
   * this interface does not lay any claim to being directly executable.
   *
   * <p>Note: This interface should not be considered stable.  Only exprSetParent
   * and exprGetParent can be counted on to work reliably.  Work in progress.</p>
   */
  public interface ExpressionNode extends SourceLocator
  {
    /** This pair of methods are used to inform the node of its
      parent. */
    public void exprSetParent(ExpressionNode n);
    public ExpressionNode exprGetParent();
  
    /** This method tells the node to add its argument to the node's
      list of children.  */
    public void exprAddChild(ExpressionNode n, int i);
  
    /** This method returns a child node.  The children are numbered
       from zero, left to right. */
    public ExpressionNode exprGetChild(int i);
  
    /** Return the number of children the node has. */
    public int exprGetNumChildren();
  }
  